TECHNICAL SPECIFICATIONS: PART - mpmandiboardmpmandiboard.gov.in/tender/tenderfile/X Technical...

BANANA PACKHOUSE & RIPENING FACILITY FOR EXPORT

Madhya Pradesh State Agricultural Marketing Board

(MP Mandi Board)

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TECHNICAL SPECIFICATIONS: PART - I CIVIL WORK BANANA PACK HOUSE

PART - II PLANT & MACHINERY A) INSULATED PANELS B) REFRIGERATION SYSTEM C) OTHER MACHINERIES PART - III POWER SUPPLY SYSTEM HT POWER SUPPLY AND LIGHTING WORKS



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Technical Specification

PART I: CIVIL WORK GENERAL CONDITIONS OF TENDER 1 The articles of Agreement and conditions of contract issued by The Indian

Institute of Architects & P.W.D. together with the drawing specifications and bill of Quantities Govern this tender.

2 The materials, goods and workmanship shall be of the best quality of their

respective kinds and those for which there is Indian standard or code of practice shall comply therewith unless otherwise started. The descriptions of material, goods and workmanship given in any one section or trade shall apply throughout the specification unless otherwise described.

3 The contractor shall carry out every thing necessary for the proper execution of

the work whether or not shown on the drawing or described in specification, provided same may reasonably be inferred there from.

4 Figured dimension shall be followed in preference to scaled dimensions and all

dimensions and particulars shall be taken from the actual work where possible

5 The contractor shall get approval for the prepared program and progress in

conjunction with MPSAMB's officials / Consultant for timely completion of the work and shall record progress there on through out the execution of the works.

6 The contractor shall provide at all times during the execution of works and

the defect liability period proper means of access, with ladders, gangways, railings etc. and necessary attendance to move and adapt same as directed for inspection or measurement of works by the MPSAMB

7 The contractor shall deliver to the MPSAMB the works progress report in quadruplicate outlining. A) Progress during the previous weekend. B) Progress for the ensuring weekend covering the status of the drawing

material procurement , civil work, erection etc. 8 The basic prices of some materials and goods on which tender is based should

be given by the tenderer for the following items: Cement (per MT) Steel (per MT) Structural Steel (per MT) Pre quoted GI Sheets (per SQ. M.)



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These prices shall be inclusive of delivery to the site and shall be net in each case after deducting all trade discounts, rebates, allowances, and cash discounts. Fluctuation in price will be not be allowed in respect of labors, materials and goods. No escalation in the rates quoted by Tenderer shall be entertained during the contract period on any other account and any other item or materials, labors due to any other reason. The contractor shall procure the materials and goods after the approval of samples from MPSAMB official / Consultant. 9. All expenses in connection with the unloading, storing and return of goods and materials shall be allowed by the Contractor. The Contractor shall provide and install all necessary hoists, ladders, scaffolding, staging, tools, vehicles, and other plants (mechanical and otherwise) and allow for altering, adapting and maintaining them as necessary and eventually removing and making good. 10. The Contractor shall provide and maintain all necessary protective and safety clothing's and equipments for operative and site staff. 11. The Contractor shall take dimensions from the existing premises and verify all dimensions given on the drawings. He shall set out and level the works and shall provide all instruments and attendance required by the MPSAMB / Consultant for checking the work. 12. The contractor will be responsible for all payments due from him under :

i) Insurance for the workmen under workmen's compensation Act. ii) Third party insurance. iii) Contractor's all risk insurance. iv) Any other insurance as may be required by Owner/ Architect/

Consultant. v) Liability under employees’ state insurance act of Govt. of Madhypradesh. vi) Taxes under works contract act of Govt. of Madhypradesh. 13. The Contractor shall allow for costs incurred by guarantee time. 14. The contractor shall keep all persons, including those employed by sub-contractor, under control and within the boundaries of the site or area allocated to him. He shall be responsible for the care of the work and/or existing premises generally until their completion, including all work executed and material goods and plants deposited on site, together with all risks arising from the weather, carelessness of work, people damage or loss by theft or any other cases and shall make good at his own cost all

such damages or loss. The Contractor shall insure all tools brought to and deposited on the site against loss or damages by fire. 15. Contractor shall protect and maintain public and private carriage ways, roads, footpaths, pipes, gutters, service mains, cables, etc. and keep approach to the site clear and make good or pay for the reinstatement of any damage caused due to execution of the work.



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16. The Contractor shall allow for all necessary watching for the security & safety of the works and protection of the public. He shall provide and maintain at his own cost all lights, guards, fencing and watching whenever and wherever necessary or as required by the MPSAMB. 17. The Contractor shall cause no annoyance or inconvenience to occupants of the premises and of those in the vicinity. 18. If the contractor deems it necessary to execute work outside normal working hours in order to complete the works by the agree date or for any other purpose, he shall obtain the consent of the MPSAMB before doing so. 19. The contractor after obtaining the permission from proper authority shall provide all necessary artificial lighting and power for the execution and security of works with all meters, temporary wiring and fittings etc. pay all charges, and alter, adapt and maintain the temporary work as necessary, and remove and make good at completion. 20. The Contractor shall provide proper sheds for the storage and protection of materials, goods tools etc. and for the execution of work which may be prepared on site. He shall provide proper sheds for work-people, sanitary accommodation for staff (deodorise the ground after (removal), site office, washing facility etc. He shall allow for paying all rates other charges which may be made by local or other authorities in connection with temporary building erected for purpose of the contract. 21. The Contractor shall allow for forming access to and on the site with necessary temporary roads, tracks, crossings etc. and for the removal and reinforcement of fences, gates etc. 22. The Contractor shall cover up and protect the works from the weather and suspend all operations during weather conditions which in the MPSAMB's/ Consultant opinion, would be detrimental to the works. 23. The contractor shall take down and clear away all plant and temporary work, including sheds, sanitary accommodations, offices etc unless otherwise described and make good. The contractor shall remove all existing rubbish and debris and surplus materials from site as they accumulated from time to time and at completion, and clean all surfaces, including those of the affected portions of the existing premises, internally & externally, remove stains and tough up paint work and polished work and

leave the works clean and to the satisfaction of the MPSAMB at completion. The MPSAMB does not bind himself to accept the lowest or any tender without assigning any reasons thereof. The technical specifications for civil work shall be as per PWD's Hand Book and as referred and described in the schedule - B.



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Pre Engineering Building work:



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PART - II: PLANT & MACHINERY

BASIC FUNCTIONAL REQUIREMENTS: The following are the basic requirements for Banana Pack House Rooms with insulated panels : Two No. Pre cooling chamber 3 MT of size 6.00 m x 5.5m x 3.5m (Ht) Three Nos. Cold store 35 MT of size 15 m x 13m x 3.5m (Ht) Four No. Ripening chambers of size 11 m x 6 m x 3.5 ( Ht) each A. Refrigeration systems complete: 1. 9.4 TR each for Pre cooling chambers. 2. 16.60 TR for cold store I, II & III each. 3. 7.45 TR each for all ripening chambers. B. Air conditioning system complete for Packing Hall & Dispatch Dock:

11.0 TR. C. Air conditioning system complete for Ante Room : 5.5 TR. D. Processing hall of size 9.8 m x 27.8 m x 4.5 m (Ht) - 1 No.



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A) INSULATED PANELS General: The cold room and other controlled temperature areas shall be made of CAM LOCK PUF panels for Pre cooling chamber- prefabricated; pre-engineered sandwich polyurethane foam (PUF) insulation panel sandwiched between minimum 0.4mm thick precoated GI sheet steel with continuous serrations on both the side for walls and ceiling in the required thickness generally as per the specification provided below. The scope include accessories like, anodized aluminum extruded angles, flashing ceiling support hardware, if required, silicon sealants, in-situ foaming at the required place so as to have appearance like modern cold rooms complex. The ceiling and wall panels shall be self supported type. The complete cold room, as a self supported module, shall be able to with stand wind velocity of minimum 125 km/hr. The cold room shall be designed with suitable impact protection arrangement considering the usage of pallet trucks/fork lift for material handling. The design of wall panels shall be suitable for mounting the sliding up or side slide type motorized insulated doors, air curtains and lighting fixtures. Although it is proposed to support the service pipes, forced draft air coolers and cable trays for power cabling from the structural members, partial support may at times be necessary for these items from the walls/ ceiling and hence these may be designed accordingly. The Ripening room / Cold storage PUF panels shall be of tight joint for no leakage. Panels shall be joined together with heavy duty action panel fasteners sealed perfectly with suitable sealant and then the joint shall be perfectly sealed with silicon sealant. This joining arrangement is applicable for packing hall PUF panels also. The wall panels shall not buckle under the operating weight of the same. Similarly, the ceiling panels should not sag under self-weight as well as the weight of light fitting, etc. which are to be suspended from the ceiling panels. Hygiene and Aesthetics of insulation is to be considered. Insulation at different areas with its thickness Insulation at different areas with its thickness

Sl. Description Type of Insulation

Thickness (mm)

Area (Sq.mtr)

1. Ceiling Panel of Packing area & Process Hall

PUF Panels 40 As per BOQ

2 Wall Panel of Process hall area PUF Slabs for Floor Insulation

PUF Panel 40 As per BOQ

3. Wall and Ceiling Panel of Ripening area

PUF panels 80 As per BOQ

4. Wall and Ceiling Panel of Cold storages


5. Wall and Ceiling Panel of Precooling Room


6. PUF Slabs for Floor Insulation PUF Slabs 80 As per BOQ



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Other Requirements: 1. The bidder shall visit the site and take into account the conditions there in order to

supply the panels as per the exact need of the site conditions. The concerned officer shall show you the premises during office hours.

2. The quantities of insulated panels shall be worked out based on the site conditions and the final joint measurement after completion of job shall be considered for payment. The dimensions of the cold store doors/windows/cutouts shall be deducted from the final measurements.

3. The bidder shall arrange for all the necessary tools and tackles for installation of these insulated panels.

4. The bidder shall depute a qualified and experienced person with adequate skilled and unskilled labours for carrying out the installation.

5. The bidder shall prepare a detailed and comprehensive supply and erection schedule and submit for approval from the owner/consultant for the same.

6. The owner/consultant from time to time may issue written instructions, directions and clarifications for the work in progress at site.

7. The bidder shall depute their senior person to attend the site meeting every week and take necessary steps immediately for the decisions taken.

8. The bidder shall have to arrange on his own accommodation for his working team at site.

9. The bidder shall have to abide by the statutory rules and regulations like labour laws, factory acts, workmanship compensation act etc.

10. The owner or their representative shall visit the site for inspection of your work any time during installation with or without prior intimation.

11. During installation, the bidder shall provide for usual safety precautions and shall take out of comprehensive insurance policy for his workman against accidents.

12. The rate shall be quoted including supply, erection, commissioning and all applicable taxes etc.

TECHNICAL SPECIFICATIONS OF FLOOR INSULATION FOR EACH CHAMBER: The surface shall be cleaned thoroughly and applied one coat of salicot. Then with hot bitumen one layer of bitumen sheet (tar felt) of thickness 3 mm thick or 200 micron PVC Sheet shall be pasted with 200 mm overlapping on all the four walls. Then install 60/80 mm, as the case may be, thick insulation of polyurethane of density 40 kg/m3 in two layers of 30/40 mm thick each with bitumen in two equal layers. Then

again put 3 mm thick bitumen sheet on the top with 100 mm overlapping on all sides. TECHNICAL SPECIFICATIONS OF INSULATED DOORS: Constructional Features: The door shall be sliding type with imported compact hinges / sliding arrangement. It shall be made of 60/80 mm, as the case may be, PUF insulation material with 40 kg per cu. m. density cladded on both sides with 0.55 mm thick pre coated GI imported or equivalent sheets. The hinges shall be sturdy and made of stainless steel of AISI 304



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quality. The door shall have a heavy duty, compact and lockable latch made from AISI 304 quality stainless steel. It should have the radium indication and the facility to open from inside. The shutter shall have dual gaskets with good quality material. The frame shall be sturdy and suitable for installation with the insulated panels. B) REFRIGERATION SYSTEM The refrigeration system comprising compressor/condensing unit, air handler/air cooling unit, receiver, and other accessories, piping, valves and fittings shall be used in the chambers i.e. pre cooling, ripening and cold store for the respective functional requirements basically for bananas and other vegetables. The design considerations are listed below for all the rooms

Sr.No. Particulars Pre Cooling Ripening Cold Store I, II & III

1. Design temperature

60C 140C 40C

(This design can also be used for higher temperatures)

2. Humidity >90% >90% >90%

3. Room size As given in Part II A

As given in Part II A

As given in Part II A

4. Capacity 3 MT x 3 per batch in 6 hours

15 MT x 4 per batch

C S I – 150 MT C S II & II – 75 MT each

5. Evaporation temperature

2 deg.C 10 deg.C 0 deg.C

6. Refrigeration load, TR

9.4 each (9.5 TR x 1 Nos. )

7.5 each (3.25 TR x 2

Nos. ) for each

16.60 ( 8.40 TR x 2 Nos. )

for each

7. Refrigerant type

134a/ 404a ( or Other CFC Free)

Sr.No. Particulars Ante Room

Packing Hall & dispatch area

Processing Hall & Receiving

area

1. Design temperature

22 - 240C

22 - 240C

24 - 280C

2. Humidity 70 – 75 %

70 – 75 %

3. Room size As per drawing As per drawing

4. Evaporation temperature

14.0 14.0

5. Refrigeration load, TR

5.5 11.0

6. Refrigerant type

134a/ 404a (Other CFC Free)



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The general technical specifications for the refrigeration systems and air conditioning systems are given below:- The refrigeration system for each chamber shall basically comprise the Following A. Condensing unit with compressor, condenser and receiver. B. Air Handling Unit with cooling coil and fan section. C. Other Accessories, Piping, Valves and Fittings and controls. The detailed technical specifications for the above components are given below. A. Condensing Unit: The bidder can quote for imported Bitzer/ Emersion/ Danfoss make as per the specifications given below: a) Compressor: - The compressor shall be imported reciprocating / Scroll, hermetically sealed,

suitable for R 134a/ R 404a/ other CFC Free and the capacity shall be as per above the refrigeration system requirements. - The motor shall be induction type air/gas cooled suitable for operation on 415 Volts, 3 phase, 50 Hz, AC power supply. The compressor cylinder and head may be gas cooled. - The compressor shall be complete with cylinder liners, pistons, oil pump, crank

shaft, connecting rod, bearing, casing, safety valves and all other accessories recommended by the manufacturer to run efficiently.

- All safety devices against high pressure, low pressure and low oil pressure shall be provided with the compressor.

- The compressor shall be provided with oil charging port and oil drain plug. - The compressor shall be provided with the following accessories – i) Crank case heater ii) Magnetic oil plug iii) Suction gas strainer iv) Mufflers v) Suction and discharge shut off valves

- The following minimum controls and interlocks shall be provided with

the compressor. i) ON/OFF delay timer ii) Interlock with liquid line solenoid valves iii) Interlock with crank case heater iv) All other safety inter locks

- The bidder MUST submit the detailed technical bulletin including power requirement of the compressor along with offer for the model quoted by them.



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b. Condenser and Receiver: Air Cooled Condenser: The air cooled condenser for the required capacity shall be designed with a seamless copper tubes of not less than 13 mm diameter with Aluminium fins of 6/8 fins per 24.5 mm. The complete details such as copper tube diameter, length of tubes, fin thickness & height & number of rows and columns shall be clearly given. The condenser shall be supplied with suitable capacity axial flow fans to cool the gas in the highest ambient temperature. The horse power of the axial fans shall be given. B. Air Handling Unit for pre cooling chamber : The bidder shall also quote for the air handling unit of capacity as specified at plus 2 deg.C evaporation temperature comprising cooling coil as per design capacity and the axial fans of specified capacity necessary for pre cooling chamber as per the general technical specifications given below. C. Air Handling Unit for Ripening Room and Cold Store : a) Cooling coil: The cooling coil shall be suitable for the refrigeration load as specified in the schedule for the room temperature to be maintained at 100C as design temperature and the evaporation temperature of 7 0 C. The coil shall be fabricated from 5/8” o.d. seamless copper tubes conforming to standard BS 2017 expanded into aluminum fins @ 6 fins per inch. The length of the coil shall be worked out for the TD (Temperature difference between return air and refrigerant) of 30C at coil. The total length of coil shall be indicated in the offer. The casing shall be fabricated from 16 gauge GI sheet and shall be easily removable type. Drain tray shall be fabricated from 16 gauges GI sheet and shall be fully reversible type i.e. drain to be centrally located at one end of the tray and can be positioned at either end. The tray slope shall be sufficient so that the water is completely drained. b) Fan Section: The fans shall be axial flow type mounted on the top of the coil and having front air discharge. The capacity of the fans shall be minimum suitable for the duties specified in the technical specifications at external static pressure of 30 mm water column C. Other accessories, piping, valves and fittings:

Refrigerant Piping: a) Refrigerant piping shall be either of seamless copper tube (IS-5493 or ANSI B 31,5 Type L) shall be of either forged brass or wrought copper. b) Refrigerant piping shall consist of the following & shall be complete with all Accessories specified herein.

- Condenser drains lines. - Liquid lines. - Suction gas lines.



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c) The hot gas discharge line shall be designed to limit the pressure drop corresponding to 2 deg. F change in saturated condensing temperature. d) The suction gas line shall be designed to limit the pressure drop corresponding to 2 deg. F change in saturated evaporating temperature. The velocity of gas in the vertical & horizontal lengths of the suction gas lines, shall be high enough to ensure oil return to the compressor. Vertical risers shall be sized for part load minimum tonnage & minimum velocity shall be determined at this condition. The maximum velocity occurring at full load shall be limited to prevent excessive noise and vibration. e) Liquid lines and condenser drain line shall be sized to limit the pressure drop corresponding to a total of 1-2 deg. F. change in saturation temperatures of the refrigerant. The velocity should be kept low enough to prevent the possibility of liquid hammer. f) Instrument piping for gauges, switches etc, shall be copper only. g) Spacing and location of hangers shall conform to preferred engineering practice. h) All horizontal lines shall be pitched with a slope of 10 mm for every 3m in the direction of refrigerant flow. Refrigerant Service Valves: a) All valves as may be applicable shall have forged brass (pack less) up to 25mm

and forged brass or steel above 25mm (packed and back seated) with flange connection or seat connection for welding or brazing to pipe. For copper pipes size 5/8” and below, flare connection will be acceptable.

b) It is preferable to have the valve stems of rising stem inside screw type. The valve body and bonnet connection shall have bolted or welded connections.

c) Gland packing for the valves shall be of Teflon material. The construction of the discs of the valve shall be either globe or angle type. The valve seat shall have white metal lining or any equivalent soft replaceable lining. Valves shall be supplied with seal supplied with seal caps to protect the valve stems from air, water and other corrosive factor.

d) Valves shall be of tested quality, leak tightness of the valves shall be tested at minimum 1-5 times the design pressure for the system.

Liquid Line Solenoid Valves:

a) The liquid lines solenoid valve shall be direct acting two-way normally closed type. The solenoid valve shall be provided with a manual lift arrangement to hold the solenoid valve open during initial evacuation or pump down for service. The makes of the valves shall be imported Danfoss / Sporlan / Alcov / or any equivalent make.

b) The valve should be of tested quality capable of withstanding an external leakage test pressure of not less than 1.5 times the Safe working pressure with the valve in open position and the outlet closed.



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Refrigerant Filter cum Drier: a) The refrigerant filter cum drier shall be partial flow, cartridge type drier. The

contactor shall select the drier with adequate water capacity to suit the system requirement.

b) The refrigerant filter drier shall be provided with bypass and isolation valves to facilitate removal of drier for cleaning, recharging and reinstalling without interrupting the system operation.

c) In the cases of carbon steel refrigerant piping additionally a magnetic separator shall be provided in the liquid line of the system.

Strainers: a) A strainer shall be provided immediately ahead of the solenoid valve. The strainer

shall be an angle cartridge type. Strainer shall be of brass material complete with bronze screen and permanent magnet.

b) Where the compressor supplied does not have a build-in suction strainer, a suction strainer shall be installed immediately ahead of the compressor suction shut off valve.

Thermostatic Expansion Valve: a) Auto Thermostatic Expansion Valve (TEV) of suitable capacity shall be provided for

DX Coils of AHU. The TEV shall have an external Equalizer connection & be provided with liquid charge external type remote bulb. The makes shall be Imported of Danfoss / Sporlan / or equivalent.

b) The thermostatic expansion valve shall be of proven make as mentioned above & be selected to match the DX coil and system pressure differential.

c) The TEV shall be adjustable over a superheat range of 0 to 250F and shall set at site to the desired superheat.

d) The external remote bulb shall be properly clamped to the horizontal portion of suction line near the evaporator outlet as per standard engineering practice, to give a quick response at designed superheat conditions.

Sight Glass: a) The sight glass shall be double port type with seal caps. b) The sight glass shall be installed in the liquid line immediately ahead of the

thermostatic expansion valve to indicate condition of the liquid as it enters the expansion valve.

Thermal Insulation: a) The following length of refrigerant piping shall be insulated:

- Suction gas line b) The refrigerant suction piping between the DX coil and compressor and between

the thermostatic expansion valve & DX coil shall be insulated with100 mm thick fire

resistant expanded polystyrene or equivalent flexible insulation material. c) Moulded section shall be attached on piping & fittings with bitumen (85/25 or

85/40) or CPRX sticking compound or Shalimar Tar Products or approved equivalent. Insulation clips shall be used as necessary.

d) Pipe work insulation shall be of the closed cell type suitable for an operating temperature ranging from (-)40C to (+)1050C.

e) The thermal conductivity shall not exceed 0.0375 W/m2 0C at a mean temperature of 210C. Average water absorption shall not exceed 1.7% by volume with 28 days dimension and the density shall be approximately 90 kg/cu.m. The material shall



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have vapour resistance throughout the wall thickness. The material shall be self-extinguishing.

f) Extra insulation thickness shall be provided at pipe hangers and special care shall be taken to seal the insulation and hanger member penetration and instruments and accessories tapping.

g) Special care shall be taken to provide satisfactory insulation for valves, flange, vessel connection etc. with proper facility for maintenance and inspection.

General Instructions For Piping Erection: a) While erecting pipes, care shall be taken to check the accessibility of valves and

specialties and maintain minimum head room requirement and other necessary clearance from the adjoining work areas.

b) Cleaning of pipes: The copper pipes shall be properly cleaned prior to use in the system. The

following procedure is recommended. i) A clean, lintels cloth should be drawn through the pipe to remove all coarse

particles of dirt and dust. ii) A clean, limitless cloth saturated with trichloroethylene for copper tube and carbon

tetrachloride for steel tube, should be pulled through pipe until the saturated cloth gets discoloured by dirt.

iii) A clean cloth saturated with compressor oil squeezed dry, is drawn throughout the tubing to remove any dirt.

iv) The cleaning job is completed by pulling through a clean dry, lintless cloth. c) Bracing/welding of Pipe i) Copper piping

- Copper piping shall be brazed with sweat joints - The tubing shall be cut to have ends perfectly square using pipe cutter &

reamed to remove burrs & finally until all dirt and oxide is removed. - All joints shall be brazed as per standard brazing practice and complying with

ANSI B 31.5 code procedures. d) When solenoid valve is installed, the coil should be removed to prevent the heat of soldering/welding from ruining the insulation. When sight glasses are being installed, the glass should be removed to prevent from cracking – No heat should be applied near the bulb of the expansion valve or other places where an excessive temperature may cause damage. e) No thermal insulation/painting should be applied for the piping anchored until

testing is completed and all leaks have been properly eliminated. C) OTHER MACHINERIES:

1.1 Spray System: ( Qty – 1 set )

The details of the components including pipes fittings are given in BOQ. Pump shall be centrifugal Monoblock type and approved make. The capacity 7500 Liters per hour at 15 m head

1.2 Recirculation systems: ( Qty – 1 set) The details of the components including pipes fittings are given in BOQ. Pump shall be centrifugal Monoblock type and approved make. The capacity 10000 Liters per hour at 25 m head



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1.3 Plastic tank for sanitizer: (Qty – 1 Nos. ) The plastic tank of capacity 500 L of Sintex or equivalent make to store the sanitizer. It may be round or rectangular shape.

1.4 Banana Tractor Trolleys: ( Qty – 2 Nos ) The banana tractor trolley shall be used to carry the banana hands from the filed to the collection center. It should be fabricated from MS channels and angles as per the drawing. The three tier trolleys shall have wooden pellets covered on top with foam and resin to be mounted on each tier individually as shown. The trolley should have hooking and locking arrangement for fixing behind the tractor. It should have two rubber tyre wheels of suitable diameter at the bottom with axle.

1.5 Platform Weigh Scales: ( Qty - 3 Nos. ) The weighing scale shall be electronic digital type with platform and

display unit with capacity of 50 kg. It should have perforated plastic tray on top of the platform for keeping about 15 – 20 kgs of Banana hands. 1.6 Sanitary spray nozzles: ( Qty - 3 Nos. )

The SS spray nozzles shall be used to spray the liquid on the banana hands after weighment and before placing on the turn table manually. It should be spring loaded with a lever in order to press the same for releasing the liquid spray through the nozzle.

1.7 Hand Portable Vacuum Machine: ( Qty - 2 Nos. ) The vacuum machine shall be portable type and used to remove

the air from the plastic bag after packing the banana hands in the bag. Capacity : 50 Cu Mtr per hour 1.8 S S Table: ( Qty - 3 Nos.)

The ss table of size 1.2 m Long and 0.6 m wide with four legs for the height of 1m from the ground floor made from S S of quality AISI 304.

1.9 Banana langer Stand: (Qty: 4 Nos) Material of Construction: FRAME 65 mm GI C class pipe Legs - . The legs will be from 50 mm dia. C class GI pipe. – 5 ft Height With SS hooks

1.10 Electrical Panel Board suitable for operating these machines (Qty - 1 Nos. ) 1.11 Banana hand cutting sickles: ( Qty – 25 Nos. )

The sickles shall be made from sharp metal and used to cut the banana hands from the lungar in the field.

1.12 Powerized banana receiving conveyor: (Qty – 3 Nos. ) This conveyor belt shall be flat belt type covered with foam and resin on top to carry banana to the treatment tank. The length of the

conveyor shall be 2.0 m. The banana hands shall be placed gently by this conveyor in to the treatment tank.

1.13 Dock seal: ( Qty _ 2 No. ) The dock seal retractable fixed type of approved make. Size :3270 mm (W) x 3200 mm (H) Shelter Construction : Welded 1½” Tubular Steel Framing with

synthetic coated or equivalent architectural fabric, permanently attached as outer covering. 6” steel channel bumpers are to be included to protect



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and support frame work. Base fabric to be vinyl, neoprene or Promax 5TM black color or equivalent. 1.14 Dock leveler: ( 2 No. ) The horizontal type dock leveler of approved make as per international

standard. An electro hydraulic dock leveler should provide to connect between vehicle to receiving area floor at city side.

� Dock leveler should contain platform and lip in anti slip steel. � It should contain double effect lip cylinder. � Should contain safety stop in case of accidental departure of the vehicle. � Must be maximum pressure valve. � Should be install rubber bumper guards. � Maximum length of platform - 2500 mm. � Maximum width of platform - 2030 mm. � Lip width - 500 mm. � Operated from inside receiving area. � Max Load capacity : 4.5 MT

1.15 Over Head sectional doors: (2 No.) Over Head sectional door of size 2.4 m x 2.8 m clear opening with vision window & button starter coupled with rails and slide rails from approved make. The specification as under 1.16 Roller Conveyor: (3 Nos.)

The roller conveyors shall be made light weight Aluminium / PVC Rollers of size OD 40 mm and 500 mm wide to transfer Banana handles into shallow plastic crates from 2 nd tank up to packing tables for packing in cartons. The roller shall be mounted on a galvanized tank of 1 m height from the ground floor duly filled with ball bearing on both side for smooth operation. The length of conveyor shall be 3 meters.

1.17 Ethylene Gas Emission system: (1 No.)

Preferably Imported / Equivalent - Fully automatic systems with gas SENSOR based control system for gas. The centralized ethylene Gas Emission system will be used to inject ethylene gas in the ripening chambers from the Nitrogen-ethylene mixture. It should be complete with PLC system, solenoid valves, Flow control valves, distribution pipes & gas manifold. This PLC should also control the co2 exhaust system also.

1.18 Ethylene Nitrogen (5% and 95%) Mixture cylinder – 4 nos



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LIST OF APPROVED MAKS

Sl. Equipment Approved make

A Plant & machinery

1. Condensing Unit Emerson / Blue Star / Voltas/ Danfoss/Bitzer

2. Air Cooling Unit Voltas / Blue Star / Aerotherm Products / Guntner/ Star Coolers

3. Ethylene emission systems Chemtron / FCE/ Equivalent.

4. Temp. & Humidity Controllers Carel / Dixcell / AS Controls

5. HP/LP Danfoss / Equivalent

6. OSS Danfoss / Equivalent

7. Cooling Tower Paharpur / Mihir / Advance

8. Water Circulation Pumps Grundfoss/ Kirloskar / Beacon

9. Valves & Fittings Danfoss /Johnson Controls/ Equivalent

10. TEX Valve Sporlon / Danfoss

11. Insulation Panel Voltas / Blue Star /TSSC/ APL Rinac/ equivalent.

15. Dock leveler Technocrat/ Gandhi/ Spanker Equivalent

16. OH sectional doors Gandhi/ Technocrat/ Spanker/ BG / Dan door/ Crawford

17. Dock Shelter Technocrat/ Gandhi/ Spanker Equivalent



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PART III: ELECTRICAL Transformer sub-station & H.T./LT The electrical works scope includes all items and works necessary for the functioning of the plant. The power switchboard cum Motor Control Centre as required for all the equipment under the scope of work should be supplied by the contractor. Installation of this switch board and all other electrical works including supply of power/control cables, remote push button panels, isolators, junction boxes, all basic materials, accessories, consumables, control/ interlocking wiring connected with the system shall be carried out by the contractor as per latest Electricity Rules & Standards applicable at working site. 6.1 CONDUITS AND OTHER ELECTRICAL WORKS Scope of work involves provision of conduits, switch boxes, junction boxes, outlet boxes and all similar connected work for Internal Electrification, involving concealed/surface conduits. In the concealed system, the conduits & accessories are to be provided in slabs during casting and in the walls by cutting chases. The conduit laying system shall

conform to the following specifications. The conduits to be provided shall bear ISI mark. The wall thickness shall not be less than 1.6 mm for conduits upto 32mm dia and not less than 2.00 mm for conduits above 32mm.The conduits shall be laid as per Chapter 4 “Metal Conduit using system” of C.P.W.D. General Specifications Part I (1994)(Internal) as amended upto date. All the conduits accessories shall be of threaded type. All threaded joints of the conduit shall be treated with suitable anti-corrosive compound. Any extra opening in the junction boxes and outlets shall be plugged with suitable bushes.All the outlet and junction boxes shall be filled with dry sand before recessing these in slabs. It is also recommended to provide a colour indication wherever junction boxes are provided in order to locate their position after the shuttering is recovered. Similarly fan boxes wherever provided shall be filled with dry sand. Hook to be provided in the fan boxes shall be made of plain Mild steel bar, in no case hook should be made of for steel. The conduit pipe should be laid in position and shall be adequately tied with the steel reinforcement bars by steel binding wires before concreting is done, to prevent displacement during casting. There shall be no clogging of conduits laid in the system. To facilitate subsequent drawing of wire in the conduits, GI fish wire of 16/18 SWG shall be provided in the conduit while recessing. Wherever not possible, the fish wire shall be provided immediately after opening of shuttering, Nothing extra shall be paid for providing G.I. fish wire.

Fixing of standard bends and elbows shall be avoided as far as practicable and all conduits shall be suitably bent in a long radius curve to permit easy drawing of wires. An earthed terminal with stud and two metal washers shall be provided in each metal box for termination of earth conductor. Protective conductor (loop earthing) of specified size shall be laid along the runs of conduit between the distribution boards/switch boards.For providing down drops, suitable chases to be cut in the wall by chase cutting tools. In no case haphazard cutting of wall by chisel shall be allowed. The conduits in the chase case shall be fixed by means of suitable staples, J-Hooks or any other approved means of fixing and these should not be more than 60 cm apart. After fixing the conduits, the chases shall be suitably filled with cement mortar 1:3 (1 cement: 3 coarse sand.)



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All the junction boxes required in the run of conduit and outlet boxes for providing the fixture shall be provided as per the drawing and requirement of the Engineer –in- harge. This shall be measured along the run of the conduit and nothing extra shall be paid. After the shuttering is removed the covers of junctions boxes/outlets shall be opened & properly cleaned and provided with layer of anticorrosive paint. The civil work around the boxes shall be finished properly. Similarly the contractor shall be responsible to open the covers of fan boxes and paint with anti-corrosive paint. The hooks in fan boxes if found to be titled shall be straightened. All the electrical materials to be used on the work shall be first got approved from the concerned authorities. The materials of first/standard quality from the following approved makes are to be used. In case it is established that the brands specified below are not available in the market, contractor shall submit alternative proposal for the approval of MPSAMB 6.2 TRANSFORMER, HT/LT CABLING, EARTHING AND SIMILAR ELECTRICAL WORK The scope of work comprises of design, supply, installation, testing and commissioning of circuit breaker, transformer. HT/LT cabling and earthing etc., installation of new DG sets including providing & installation etc. of AMF panel & acoustic enclosure as given in the schedule of quantities, liasoning for approval of the installation from statutory authorities as required under the rules on Turnkey basis. However, the tenderer is instructed to further design and calculate the exact BOQ quantity before quoting the rate as the variation in quantity with respect to BOQ quantity will not be paid. Further the Contractor without any extra cost will also provide any item that is otherwise required but not covered in the BOQ. The work shall comprise of entire labour including supervision and all materials necessary to make a complete installation of such tests and adjustments and commissioning as may be required to give a satisfactory working installation to the entire satisfaction of the department. The term complete installation shall mean, not only, major item of the plant and the equipment covered by these specifications, but also, incidental sundry components necessary for complete execution and satisfactory performance of installation with all labour charges whether or not, these have been mentioned in detail in the tender document. 6.3 COMPLETENESS OF TENDER All fittings, unit assemblies, accessories, hardware foundation bolts, terminals block for connections, cable glands and miscellaneous materials and accessories of items of work which are useful and necessary for efficient assembly and working of the equipment shall be deemed to have been included within the scope of the work in the tender and within the overall details for complete item, whether they have been specifically

mentioned or not. 6.4 INDIAN ELECTRICITY ACT AND RULES: All electrical works in connection with installation of electric sub-station shall be carried out in accordance with the provisions of Indian Electricity Act, 1910 and the Indian Electricity Rules 1956 amended upto date.



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6.5 DATA, MANUALS AND DRAWINGS TO BE FURNISHED BY CONTRACTOR: a) After Award of Work the contractor shall submit the following drawing for approval by the department, before execution of the work :- i) General arrangement or location drawing of the equipment complete with dimensions and clearances. ii) Details of foundation for equipments and weight of assembled equipment. iii) General arrangement drawing of H.V. Panel, Transformers, M.V. panels, earthing, cable routes etc. iv) Control and protection schematics and wiring diagrams. v) Bar chart indicating general programmes for supply installation, testing and commissioning and handling over. vi) Any other drawing or data that may be necessary for the job. b) Before Commencement of Installation The contractor shall also furnish 3 copies of detailed installation, operation and maintenance manuals of manufacturers for all items of equipment together with all relevant date sheet, spare parts catalogue, repairs assembly and adjustment procedure etc. in triplicate. 6.6 QUALITY OF MATERIALS AND WORKMANSHIP i) All parts of equipment shall be of such design, size and material so as to function satisfactorily under all rated conditions of loading and operation. All components of the equipment shall have adequate factors of safety. Materials/ components which are not conforming to standards laid down by Indian Standards Institution shall be get approved from the department before use on the work. ii) The entire work of fabrication, assembly and installation shall conform to sound engineering practice and on the basis of "fail safe" design. The mechanical parts subject to wear and tear shall be of easily replaceable type. iii) The construction shall be such as to facilitate ease of operation, inspection, maintenance and repairs. All apparatus shall also be designed to ensure satisfactory operations under working conditions as specified. Cast iron shall not normally be used for chambers of oil filled apparatus or for any part of the equipment which is in tension or subject to impact stresses. iv) All connections and contacts shall be designed to minimize the risk or accidental short-circuit caused by animals, birds, vermin.

v) Surfaces which are in contact with oil shall not be gal vanished or cadmium plated. 6.7 TEST CERTIFICATE Copies of all documents of routine and type test certificates of the equipment carried out at the manufacturers premises shall be furnished to the department alongwith the supply of the equipment.



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6.8 PAINTING & PROTECTION All equipment supplied, wherever feasible, shall be given final coat of paint over the primer after necessary treatment at the works before despatch. All damages to painting during transport and installation shall be set right or repainted to the satisfaction of the department before handing over. All structural frame work of support of various items of equipment shall be given the final coat of paint of approved shade at site after erection is complete. Additional protection measures against corrosion shall be provided when installed in special environment. Colour scheme for the equipment shall be as per relevant Indian Standards. 6.9 COMPLETION DRAWINGS Three sets of completion drawings comprising the following drawings shall be submitted by the contractor while handing over the installation. Equipment installation drawings giving complete details of the entire equipment. Electrical drawings for the entire electrical equipment showing cable sizes, equipment capacities, switchgears ratings control components, control wiring etc. Schematic diagram of the entire substation installation. 6.10 FINAL INSPECTION AND TESTING When the installation is deemed by the contractor to be complete, he shall arrange with the Department/ Inspector for inspection and testing of the installation. Test results obtained shall be recorded and installation shall not be accepted until the department/ inspecting officer is satisfied about its compliance with the requirement of these specifications. The scope of inspection and testing shall include necessary statutory inspection by the Electrical inspector to Govt. as well as inspection and calibration requirements of licensee or licensee's Engineers. 6.11 STATUTORY APPROVALS The contractor shall submit the required applications, drawings etc. to the Electrical Inspector to Govt. and/ or any other statutory authorities and obtain their approval/ sanctions etc. The final completion certificate shall be obtained by the contractor from all the statutory authorities to enable the client to commission the equipment for its utiisation. The contractor shall also depart the required fees etc. to the authorities for

getting approvals etc. Fees paid by the contractor shall be reimbursed by the dept. on production of receipts, but all other charges and Liasioning work expenses shall be borne by the contractor.



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Some of the important components specifications, requirements and other details are given below: 6.12 CIRCUIT BREAKERS - 11,000 VOLTS 6.12.1 TECHNICAL SPECIFICATIONS: The technical specifications cover the 11,000 volt Circuit Breakers to be supplied, delivered, erected and commissioned for a 11 KV system suitable for the following supply system:

Rated Voltage 11,000 Volt 3 Phase earthed system Rated Frequency 50 cycles per second Fault Level 350 MVA at 11,000 Volts or as specified.

The technical specifications of the equipment covered by the scope of the contract are detailed in the following paras and shall be suitable for continuous operation at the site conditions stipulated in these specifications. 6.12.2 STANDARDS AND CODES The following Indian Standards Specifications and Codes of Practice will apply to the equipment and the work covered by the Scope of this Contract. In addition the relevant clauses of the Indian Electricity Act 1910 and Indian Electricity Rules 1956 as amended upto date shall also apply. Wherever appropriate Indian Standards are not available, relevant British and/ or. IEC Standards shall be applicable. BIS certified equipment shall be used as a part of the Contract in line with Government Regulations. Necessary Test Certificates in support of the Certification shall be submitted prior to supply of the equipment. It is to be noted that updated and current Standards shall be applicable irrespective of those listed below. 6.12.3

TECHNICAL PARAMETERS The 11000 volt circuit breakers shall be triple pole bulk oil or minimum oil type as specified suitable for indoor mounting and shall comply with the requirements of the

11000 Volt Circuit Breaker

IS 2516 Part I IS 2516 Part II

1972 1965

Metal Enclosed Switchgear a Control gear for Voltages ab 1000 volts

IS 3427 1969

Electrical Relays for Po System Protection

IS 3427 1969

Electrical Relays for Po System Protection

IS 3231 1965

Voltage Transformers IS 3156 Parts I to IV

Current Transformers IS 2705 1964

Insulation oils for Transformer and Switchgears

IS 335 1972

PVC Sleeving for Electrical purposes IS 1951 1961



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relevant Indian Standards. The Circuit Breakers shall be suitable for operation at 11000 volts 3 phase 50 Hz supply system and shall have a certified symmetrical breaking capacity of 350 MVA t 11000 Volts or as specified. 6.12.4 CIRCUIT BREAKER CONSTRUCTIONAL FEATURES The 11000 Volt circuit breaker shall be flush front, metal clad, truck mounted oil immersed, draw out type and fully interlocked. The truck that carries the Circuit Breaker shall be of rigid fabricated construction. Each Circuit Breaker shall be housed in a separate compartment enclosed on all sides. Each withdraw able truck shall have its own Circuit Breaker with a raising and lowering mechanism. All electrical connections on the truck shall be brought to secondary plugs which engage similar sockets in the housing. The Circuit Breakers shall be of the vertical isolation double break type housed in a cylindrical tank. Interphase barriers and tank lining of insulating material shall be provided. The draw out mechanism shall be so designed and constructed as to permit smooth withdrawal and insertion. The movement shall be free of jerks, easy to operate and positive. All current carrying parts in the Circuit Breaker shall be silver plated and suitable arcing contacts shall be provided to protect the main contacts. Isolating contacts of the spring loaded self aligning pattern shall be provided for the Circuit Breaker. Suitable arc control devices shall be mounted around the fixed contacts. Terminal insulators of synthetic resin bonded paper shall be provided suitable for the specified short circuit level. Sheet steel barriers shall be provided between Instrument Panel and Potential Transformer Instrument Panel and Current Transformers Busbar chamber and Circuit Breaker compartments 6.12.5 CIRCUIT BREAKER OPERATING MECHANISM

The Circuit Breaker shall be trip free and equipped with a hand charged spring operated or motor power operated closing mechanism. The operating mechanism shall be such that the Circuit Breaker is at all times free to open immediately the trip coil is energised. Mechanical ON/ OFF position indication shall be provided on the front of the circuit breaker. The operating mechanism shall be mounted on the front panel of the truck.



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The operating handle and the mechanical trip push button shall be at the front of and integral with the Circuit Breaker. The operating mechanism shall provide four distinct and separate positions of the Circuit Breaker on the candle Service Test Isolated Maintenance 6.12.6 CIRCUIT BREAKER INTERLOCKING Each Circuit Breaker shall be provided with the following mechanical safety interlocks to ensure protection to the equipment and the operator. The Circuit Breaker cannot be raised and plugged into the busbar and feeder spouts unless the tank is bolted to the top plate. The Circuit Breaker cannot be raised or lowered unless the main contacts are open. The Circuit Breaker cannot be withdrawn from or pushed into the housing unless it is in the fully lowered position and the main contacts are open. The Circuit Breaker cannot be put into service without making the secondary connections between the truck and housing. The cover of the draw out voltage transformer cannot be opened unless the transformer is isolated. 6.12.7 CIRCUIT BREAKER AUXILIARY CONTACTS The Circuit Breaker shall have a minimum of 4 N.O. and 4 N.C. auxiliary contacts rated at 5 amps. These contacts shall close before the main contacts when the Circuit Breaker is plugged in and vice versa when the Circuit Breaker is lowered. 6.12.8 PROTECTIVE RELAYS The Circuit Breaker shall have over current, earth fault protection and auxiliary relay devices as specified in the Schedule of Quantities. These relays shall be mounted flush on a separate compartment with access from the rear for wiring and maintenance.

6.12.9 POTENTIAL AND INSTRUMENT TRANSFORMERS A draw out type oil filled voltage transformer shall be mounted in the panel and connected to the bus bars. The tank shall be arranged for horizontal isolation. The primary fuses and current limiting resistors may be mounted inside the tank but cartridge type secondary fuses shall be mounted on the exterior of the tank.



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The Circuit Breaker shall have the required current transformers as specified in the Schedule of Quantities for metering and protection mounted outside the Circuit Breaker Compartment but within the free standing cubicle. The transformers shall comply to the relevant Indian Standards. All current transformers for metering shall be Accuracy Class I and of capacity and ratio as required. Separate sets of current transformers shall be provided for metering and protection. 6.12.10 INSTRUMENTATION Instruments and indicating lamps as required in the Schedule of Quantities shall not be mounted on the Circuit Breaker compartment door. A separate adequate compartment shall be provided. The instruments and relays shall be accessible for testing and maintenance without danger of accidental contact with live parts in the Switch gear Panel. Square pattern flush mounting meters and selector switches of the three way and OFF pattern complying with the requirements of the relevant Indian Standards shall be used. The current transformers for metering and protection shall be mounted on the solid copper bus bars with proper supports. Neon Type indicating lamps shall be provided for phase and other operational indications. 6.12.11 SWITCHGEAR PANEL INTERNAL WIRING All wiring for relays and metering shall be with PVC insulated copper conductor wires. The wiring shall be coded and labeled with approved ferrules for identification. The minimum size of copper conductor control wires shall be 1.5 sq.mm.All control circuits shall be provided with protective H.R.C. fuses and Instrument test plugs for testing the meters. 6.12.12 EARTHING The frame of the Circuit Breaker shall be properly earthed when the Circuit Breaker is racked into the cubicle. 6.12.13 TYPE TEST CERTIFICATES

The contractor shall submit type test certificates of the Circuit Breakers complying to the relevant Indian Standards from a recognised Test House. 6.12.14 SHEET STEEL TREATMENT AND PAINTING Sheet steel materials used in the construction of the Switchgear Panels should have undergone a rigorous rust proofing process comprising of alkaline degreasing, descaling in dilute sulphuric acid and a recognised phosphating process. The sheet steel work shall



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then receive two coats of oxide filler prier before final painting. Castings shall be scrupulously cleaned and fettled before receiving a similar oxide primer coat. All sheet steel work shall after metal treatment be spray or powder painted with two coats of shade 692 to IS 5 on the outside and white on the inside. Each coat of paint shall be properly stoved and the paint thickness shall be not less than 50 microns. 6.13 TECHNICAL SPECIFICATIONS: MEDIUM VOLTAGE SWITCHGEAR 6.13.1 STANDARDS AND CODES The following Indian Standard Specifications and Codes of Practice will apply to the equipment and the work covered by the scope of this contract. In addition the relevant clauses of the Indian Electricity Act 1910 and Indian Electricity Rules 1956 as amended upto date shall also apply. Wherever appropriate Indian Standards are not available, relevant British and/ or IEC Standards shall be applicable. BIS certified equipment shall be used as a part of the Contract in line with Government regulations. Necessary test certificates in support of the certification shall be submitted prior to supply of the equipment. It is to be noted that updated and current Standards shall be applicable irrespective of those listed below. 433 Volt circuit breakers IS 2516 Part I 1985

IS 2516 Part I 1980 IS 2516 Part II 1985

Switchgear busbars IS 11353 1985 Enclosures for low voltage switchgear IS 2147 1962 Electrical relays for power system Protection IS 3231 1977 Code of Practice for installation and maintenance of switchgear not exceeding 1000 volts IS 10118 1982

General requirements for switchgear and control gear for voltages not exceeding 1000 volts IS 4237 1982 Specifications for factory built assemblies of switchgear and control gear for voltages upto and including 1000 volt ac or 1200 volt dc IS 8623 1980



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6.13.2 MEDIUM VOLTAGE SWITCH BOARDS GENERAL ♦ All the Medium Voltage Switch Boards shall be suitable for operation at three phase/ three phase 4 wire, 440 volt, 50 Hz, neutral grounded at transformer system with a short circuit level withstand of not less than 35 MVA at 415 volts and a short time rating of not less than 35 MVA at 415 volts for 1 second. ♦ The Switch Boards shall comply with the latest edition with upto date amendments of relevant Indian Standards and Indian Electricity Rules and Regulations. 6.13.3 SWITCH BOARD CONFIGURATION The Switch Board shall be configured with Air Circuit Breakers, Fuse Switch Units, MCCB's, and other equipment as called for in the Schedule of Quantities. The Fuse Switch units and MCCB's shall be arranged in multi-tier formation whereas the Air Circuit Breakers shall be arranged in Single or Double tier formation only to facilitate operation and maintenance. The Switch Boards shall be of adequate size with a provision of 25% spare space to accommodate possible future additional switch gear. 6.13.4 EQUIPMENT SPECIFICATIONS All equipment used to configure the Switch Board shall comply to the relevant Standards and Codes of the Bureau of Indian Standards and Codes of the Bureau of Indian Standards and to the detailed technical Specifications as included in this tender document. 6.13.5 CONSTRUCTIONAL FEATUES The Switch Boards shall be metal enclosed, sheet steel cubicle pattern, extensible, dead front, floor mounting type and suitable for indoor mounting. The Switch Boards shall be totally enclosed, completely dust and vermin proof. Synthetic rubber gaskets between all adjacent units and beneath all covers shall be provided to

render the joints dust and vermin proof to provide a degree of protection of IP 52. All doors and covers shall also be fully gasketed with synthetic rubber and shall be lockable. The Switch Board shall be fabricated with CRCA sheet steel of thickness not less than 2.0 mm and shall be folded and braced as necessary to provide a rigid support for all components. The doors and covers shall be constructed from CRCA sheet steel of thickness not less than 1.6 mm. Joints of any kind in sheet metal shall be seam welded and all welding slag ground off and welding pits wiped smooth with plumber metal.



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All panels and covers shall be properly fitted and square with the frame. The holes in the panel shall be correctly positioned. Fixing screws shall enter holes tapped into an adequate thickness of metal or provided with hank nuts. Self threading screws shall not be used in the construction of the Switch Boards. 6.13.6 SWITCHBOARD DIMENSIONAL LIMITATIONS A base channel 75 mm x 5 mm thick shall be provided at the bottom. A minimum of 200 mm blank space between the floor of switch board and bottom most unit shall be provided. The overall height of the Switch Board shall be limited to 2100 mm The height of the operating handle, push buttons etc. shall be restricted between 300 mm and 2000 mm from finished floor level. 6.13.7 SWITCH BOARD COMPARTMENTALISATION The Switch Board shall be divided into distinct separate compartments comprising. A completely enclosed ventilated dust and vermin proof bus bar compartment for the horizontal and vertical bus bars. Each circuit breaker, switch fuse unit and MCCB shall be housed in separate compartments enclosed on all sides. Sheet steel hinged lockable doors for each separate compartment shall be provided and duly interlocked with the breaker/ switch fuse unit in "on" and 'off' position. For all Circuit Breakers separate and adequate compartments shall be provided for accommodating instruments, indicating lamps, control contactors and control fuses etc. These shall be accessible for testing and maintenance without any danger of accidental contact with live parts of the circuit breaker, bus bars and connections. A horizontal wire way with screwed cover shall be provided at the top to take interconnecting control wiring between vertical sections.

Separate cable compartments running the heights of the switch board in the case of front access Boards shall be provided for incoming and out going cables. Cable compartments shall be of adequate size for easy termination of all incoming and outgoing cables entering from bottom or top.



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Adequate and proper support shall be provided in cable compartments to support cables. 6.13.8 SWITCH BOARD BUS BARS The Bus Bar and interconnections shall be of electrolytic Copper/ Aluminium and of rectangular cross sections suitable for full load current for phase bus bars and half rated current for neutral bus bar. The maximum current density for copper shall be 1.6 amps per sq. mm. And for Aluminium shall be 1 amp. per Sq. mm and suitable to withstand the stresses of a 35 MVA fault level at 415 volts for 1 second. The bus bars and interconnections shall be insulated with insulation tape/ fibre glass. The bus bars shall be extensible on either side of the Switch Board. The bus bars shall be supported on non-breakable, non-hygroscopic insulated supports at regular intervals, to withstand the forces arising from a fault level of 35 MVA at 415 volts for 1 second. All bus bars shall be colour coded. All bus bar connections in Switch Boards shall be bolted with brass bolts and nuts. Additional cross section of bus bars shall be provided wherever holes are drilled in the bus bars. 6.13.9 SWITCH BOARD INTERCONNECTIONS All connections between the bus bars/ switches/ cable terminations shall be through solid copper strips of adequate size to carry full rated current and PVC/ fibre glass insulated. For unit ratings upto 100 amps PVC insulated copper conductor wires of adequate size to carry full load current shall be used. The terminations of all such interconnections shall be crimped. 6.13.10 DRAWOUT FEATURES All Circuit Breakers and MCCB's shall be provided in fully drawout cubicles. These cubicles shall be such that drawout is possible without disconnection of the wires and

cables. The power and control circuits shall have self aligning and self isolating contacts. The fixed and moving contacts shall be easily accessible for operation and maintenance. Mechanical interlocks shall be provided on the drawout cubicles to ensure safety and compliance to relevant Standards. 6.13.11 INSTRUMENT ACCOMODATION Instruments and indicating lamps shall not be mounted on the Circuit Breaker Compartment door for which a separate and adequate compartment shall be provided



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and the instrumentation shall be accessible for testing and maintenance without danger of accidental contact with live parts of the Switch Board. For fuse switch units/ MCCB's instruments and indicating lamps can be provided on the compartment doors. The current transformers for metering and for protection shall be mounted on the solid copper/ aluminium bus bars with proper supports. 6.13.12 WIRING ♦ All wiring for relays and meters shall be with PVC insulated copper conductor wires. The wiring shall be coded and labeled with approved ferrules for identification. The minimum size of copper conductor control wires shall be 1.5 sq. mm. 6.13.13 CABLE TERMINATIONS Knockout holes of appropriate size and number shall be provided in the Switch Board in Conformity with the location of incoming and outgoing conduits/ cables.

The cable terminations of the Circuit Breakers shall be brought out to terminal cable sockets suitably located at the rear of the panel. The cable terminations for the switch fuse units/ MCCB/ MCB's shall be brought out to the rear in the case of rear access switchboards or in the cable compartment in the case of front access Switch Boards. The Switch Boards shall be complete with tinned brass cable sockets, tinned brass compression glands, gland plates, supporting clamps and brackets etc. for termination of 1100 Volt grade aluminium conductor PVC/ PVCA cables. 6.13.14 EARTHING A main earth bar of G.I./ copper as required shall be provided throughout the full length of the Switch Board with a provision to make connections to the sub-station earths on both sides. 6.13.15 SHEET STEEL TREATMENT AND PAINTING

Sheet Steel materials used in the construction of these units should have undergone a rigorous rust proofing process comprising of alkaline degreasing, descaling in dilute sulphuric acid and a recognised phosphating process. The steel work shall then receive two costs of oxide filler primer before final painting. Castings shall be scrupulously cleaned and fettled before receiving a similar oxide primer coat. All sheet steel shall after metal treatment be spray or power painted with two coats of shade 692 to IS 5 on the outside and white on the inside. Each coat of paint shall be properly stoved and the paint thickness shall not be less than 50 microns.



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6.13.16 NAME PLATES AND LABELS Suitable engraved white on black name plates and indentification labels of metal for all Switch Boards and Circuits shall be provided. These shall indicate the feeder number and feeder designation. 6.13.17 INSTALLATION The foundations prepared as per the manufacturers drawings shall be levelled, checked for accuracy and the Switch Board installed. All bus bar connections shall be checked with a feeler gauge after installation. The cable end boxes shall be sealed to prevent entry of moisture. The main earth bar shall be connected to the sub-station earths. A 15 mm thick rubber matting of approved make on a 100 mm high timber platform shall be provided in front of and along the full length of the Switch Board. The width of the matting shall be 1000 mm. The rubber mat shall withstand 15 KV for 1 minute and leakage current shall not exceed 160 ma/sq. metre. After installation the Switch Board shall be tested as required prior to commissioning. 6.14 OIL COOLED TRANSFORMER GENERAL The step down double wound core type transformers shall be suitable for Indoor mounting with a voltage ratio of 11000/ 415 volts and of the naturally cooled oil immersed type ON with a Delta/ Star configuration. The transformer shall comply with the regulations of IEC 76. B.S. 171 and I.S. 2026 - 1977 as amended up-to-date. 6.14.1 TRANSFORMER DETAILED SPECIFICATIONS : TRANSFORMER OPERATION The transformer shall be suitable for operation on 11 Kv, 3 phase 50 cycle earthed system, connected Delta on H.V. side and star on the L.V. side with neutral brought out for independent earthing (Vector Group DY II). The transformer shall be suitable for continuous operation at the rated capacity under Site conditions.

6.14.2 TRANSFORMER MATERIAL The material used in the manufacture of the transformer shall be of the best quality of their respective kind available as per standard specifications. 6.14.3 CORE MATERIAL The magnetic iron core shall be made of high grade alloy, low loss grain oriented cold rolled steel stampings.



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6.14.4 CORE WINDINGS The high voltage and low voltage windings shall be of copper conductors arranged on the vertical limbs in the steel tank. 6.14.5 INSULATION CLASS The insulation material used shall be insulation class 'A'. 6.14.6 TRANSFORMER TAPPINGS The transformer shall be provided with an off load externally hand operated switch with 5 off load taps set for plus/ minus 2.5%, 5% and minus 7.5% on H.V. side so as to give a constant voltage on L.V. side. 6.14.7 TRANSFORMER CHARACTERISTICS ♦ The no load voltage ratio of the transformer shall be 11000/415 volts and the

percentage impedance shall not exceed 5%. 6.14.8 TRANSFORMER TERMINATIONS The transformer shall have cable boxes with suitable glands and cable sockets for receiving 11,000 volt grade XLPE or PILCDSTA cables on the H.V. side as required. On the L.T. side the transformer shall have suitable compression glands and cable sockets for crimping of 1100 volt grade PVC & A cables or a suitable terminal arrangement with extended busbars to receive 415 volt Bus Duct with copper/ aluminum bus bars as specified. 6.14.9 TEMPERATURE RISE PARAMETERS Thermistor sensors shall be embedded in the low voltage winding for warning and tripping, for temperature control. The temperature detectors shall be suitable for 24 volts D.C. The temperature rise when continuously operated of windings by resistance method shall not exceed 55 deg. C. over 45 deg. C. ambient. 6.14.10 TRANSFORMER FITTINGS

The transformer shall be manufactured in accordance with the requirements as specified in the Standards stated above and shall be fitted with: Diagram and Rating plate Lifting Lugs Two earthing terminals on either side of the tank. Four bidirectional rollers on the under carriage for movement. Winding Temperature Indicator with alarm contacts for alarm and trip circuits.



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Externally operated tapping switch with locking arrangement. Terminal marking plate. Jacking Lugs. H.V. cable box for 3 core XLPE/ PILCDSTA cable as required. L.V. cable box suitable for reception of PVC & A armoured cables or chamber for receiving bus Duct as required. Oil conservator with drain plug Oil filling hole and cap. Filter valve with plug. Drain valve with plug or cover plate. Oil level indicator with minimum marking. Dehydrating breather. Air release valve. Explosion vent. Thermometer pocket with plug. 150 mm dial type contact thermometer with maximum temperature indicator and alarm and resetting device. Buchholz relay of double float type with M.S. box for terminating control cables of 4 x 2.5 sq. mm. Size. The transformer shall be complete with the first filling of insulating oil as per IS 335 - 1972 including make up fill at site. 6.14.11 TRANSFORMER GUARANTEED TECHNICAL PARTICULARS The following guaranteed technical particulars of the transformer shall be intimated. Core Loss Load Loss Percentage Impedance 6.14.12 TRANSFORMER TESTING Prior to acceptance and despatch of the transformer, the Client reserves the right to witness the routine tests at manufacturers works. The transformer shall be subjected to the following tests as per IS 2026 - 1962 at the manufacturers Works. The test certificates shall be submitted to the clients for approval prior to despatch.

Measurement of Winding Resistance Ratio polarity and phase relationship No load and load losses Impedance voltage No load and load current Insulation resistance Induced over voltage withstand Separate source voltage withstand Temperature Rise



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Impulse voltage withstand, if required by Client. 6.14.13 INSTALLATION The transformer shall be installed as per the manufacturers instruction manual and shall conform to the requirements of IS 1886-1967. The transformer foundations shall be cast as required. If any lifting is required, the same shall be done by all the lifting lugs to avoid any imbalance. The transformer wheels shall be locked by suitable locking arrangement to avoid accidental movement after testing and commissioning. The transformer cable end boxes shall be sealed to prevent entry of moisture. The transformer neutral and body earthing shall be as per the requirements of IS 3043 - 1966 and the Local Inspecting Authorities. 6.14.14 COMMISSIONING TESTS The following tests shall be carried out prior to commissioning: Insulation resistance of the winding between phases and phase and earth on the H.T. side. Winding resistance of all the windings on all tap positions. Di-electric strength of oil shall be tested in accordance with IS 335- 1963. In case the same is not satisfactory, the oil shall be filtered till a proper di-electric strength is obtained. Operation of Bucholz relay shall be tested in conjunction with H.T. Circuit Breaker to test Bucholz alarm, trip and high temperature alarm. The transformer breathers shall be cleaned and filled with transformer oil and silica gel. Voltage ratio test shall be carried out by applying low voltage on H.T. side and measuring the voltage between phases and phase and neutral on the L.T. side for every tap setting.

If necessary the transformer shall be heated by applying low voltage on the H.T. side and shorting the L.T. side. This shall be done for a period of 48 hours or till all the moisture has been removed from the transformer. On commissioning of the transformer the following readings shall be taken: L.T. side voltages at all tap settings. Temperature rise under no load conditions.



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6.14.15 EARTHING SYSTEM SCOPE This section covers the general requirements of the earthing system for sub-station installation. SYSTEMS Earthing system shall comprise earth electrodes in accordance with clause 1.6.10.3. of General Specifications for Elect. Works (Part I- Internal) 1972. For every additional transformer 2 more separate and distinct earth electrodes shall be provided for neutral earthing. The body earthing for transformers, HV & MV panels shall be done to a common earth bus connected to two separate and distinct earth electrodes. Note: For a single transformer sub-station, the total number of earth electrodes shall be 4 (2 for neutral and 2 for connection to a common earth bus for body earthing). For a two transformer substation total number of earth electrodes shall be 6 (4 for neutral earthing and 2 for connecting to a common earth bus for body earthing). ELECTRODES: The earth electrodes shall be as per CPWD General Specifications (Part I - internal) 1972 amended upto-date. LOCATION OF EARTH ELECTRODES: Normally an earth electrode shall not be situated less than 1.5 m from any building. Care shall be taken that the excavation for earth electrode may not affect the column footings or foundation of the building. In such cases electrodes may be farther away from the building. The location of the earth electrode will be such where the soil has reasonable chance of remaining moist. As far as possible, entrances, pavements and road ways are to be definitely avoided for locating the earth electrode. WATERING ARRANGEMENT:

Method of watering arrangement shall comply with CPWD General Specifications. SIZE OF EARTH LEAD: The recommended sizes of copper earth bus lead in case of sub-stations shall be in accordance with cl. 1.6.7.2. of General Specifications for Electrical works (Part I - Internal) 1972 amended upto-date. The minimum size of earth lead shall be 20 mm x 4 mm copper or equivalent GI strip.



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INSTALLATION: All joints shall be revetted and sweated. Joints in the earth bar shall be bolted and the joints faces tinned. Where the diameter of the bolt for connecting earth bar to apparatus exceeds one quarter of the width of the earth bar, the connection to the bolt shall be made with a wider piece of flange of copper jointed to earth bar. These shall be tinned at the point of connection to equipment and special care taken to ensure a permanent low resistance contact to iron or steel All steel bolts, nuts, washers, etc. shall be cadmium plated. Main earth-bars shall be spaced sufficiently away from the surface to which they are fixed such as walls or the side of trenches to allow for ease of connections. Copper earth bars shall not be fixed by ferrous fittings. The earthing shall be suitably protected from mechanical injury by galvanised iron pipe wherever it passes through wall and floor. The portion within ground shall be buried at least 60 cm deep. The earthing lead shall be securely bolted and soldered to the plate or pipe as the case may be . In the case of the plate, the lead shall be connected by means of a cable socket with two bolts and nuts. All washers shall be of the same materials as the plate or pipe. All iron bolts nuts, and washers shall be galvanize. TESTING After installation, the tests as specified in CPWD General Specifications for Electrical Works (Part-I - Internal) 1972 shall be carried out and results recorded.



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MAKES OF ELECTRICAL ITEMS

Sr. No.

Item description Acceptable makes

1 GOD, DOF Atlas / Kiran / Pactil

2 HT Insulators W.S. / BHEL / Jayashree

3 HT Lightening arrestor Elpro

4 Transformer Kirloskar / CGL / Patson

5 HT Metering cubicle Huphen

6 TOD meter ABB / L&T

7 Diesel engine Cummins / Kirloskar

8 Alternator Stamford / Kirloskar

9 DG set assembler Cummins / Kirloskar authorized agency

10 Electric motors CGL/ KEC / NGEF / Siemens / BB

11 Switch-fuse unit / MCCB L& T / Siemens

12 Changeover switch HPL / Havells

13 DOL / SD starters / Contactors L& T / Siemens

14 Voltmeter / Ammeter A.E. / L&T

15 Indication lamps (cluster LED ) Teknik / L&T / Siemens

16 Push-buttons Teknik / L&T / Siemens

17 Selector switches Kaycee / Salzer

18 Control fuses L& T / Siemens

19 Terminals Elmex

20 Panel & lighting wires Polycab / Finolex

21 HV cables CCI / RPG

22 HV cable terminations Raychem

23 LV cables CCI / RPG/ Finolex / Polycab

24 Cable lugs Dowells

25 Cable glands Comet

26 Lighting fixtures CGL / Bajaj / Phillips

27 Lighting panels / MCB-DBs MDS

28 MCBs Siemens / MDS

29 Ceiling fans CGL / Bajaj

30 Exhaust fans CGL / GEC

31 Light switches, plugs, sockets Anchor

32 Metal-clad plug sockets MDS / BCH

33 PF capacitors L& T / CGL / Ducati

34 APFC relay Syntron / Sycon NOTES : 1) Contractor shall supply equipment / material of one of the above approved makes only. 2) Any makes other than those specified above shall be mentioned in Tender as Deviation and shall be subject to Owner’s/ Consultant prior approval.



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3) Makes for items not covered above shall be subject to Owner’s/ Consultant prior approval.

TECHNICAL SPECIFICATIONS: PART - mpmandiboardmpmandiboard.gov.in/tender/tenderfile/X Technical...

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