111 IUM Specification (Jan-2012)

7/29/2019 111 IUM Specification (Jan-2012)

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HARYANA VIDYUT PRASARAN NIGAM LTD.

TECHNICAL SPECIFICATIONS

FOR

INTERUTILITY METERING SYSTEM AND

COMMON METER READING INSTRUMENT(CMRI)

SPEC. NO. HPD/S-72/HPM-461/Vol-II/PROT. (Jan-2012)

Chief Engineer/MMDesign Directorate,HVPNL, Shakti Bhawan,Sec-6, Panchkula-134109(HARYANA).

Tel/Fax No. 0172-2583724


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TECHNICAL SPECIFICATION FOR INTERUTILITY METERING SYSTEM

1.0 The specification covers the design, manufacturing, testing, inspection, delivery ofinterutility metering system and /or common meter reading instrument (CMRI).

2.0 The energy meters specified herein shall be used for tariff metering for bulk, Inter-utility power flows in HVPNL/DISCOM. The meters shall be installed on eachcircuit as a self contained device for measurement of active energy & reactiveenergy in each successive 15-minute block and certain other functions asdescribed in the following paragraphs.

3.0 The meters shall be suitable for being connected through Test terminal blocks tothe voltage transformer having a rated secondary line to line voltage of 110 V,and to current transformers having a rated secondary current of 1 A. Any furthertransformer/transducers required for their functioning shall be in built in themeters. Necessary isolation and / or suppression shall also be built in forprotecting the meters from surges and voltage spikes that occur in the VT/CT

circuits of the switchyards. The reference frequency shall be 50Hz.

4.0 The microprocessor based 3 phase 4 wire meters shall conform to class 0.2S asper IS 14697 for Indian manufacturers or IEC- 62053-22 (2003) for foreignmanufacturers & technical specification and meter shall be stand alone type. Themeters shall bear BIS certification mark, if required as per Govt. of India Gazettenotification. It will be the responsibility of the bidder to get these meters markedwith BIS certification. The BIS certification shall be supplied with the tender.

5.0 Meters shall be supplied with associated TTBs. The Meters shall have followingfeatures: -

a) Meter shall be stand alone type.

b) For transfer of data, system should have multiple communication ports asdescribed in the following paragraphs

6.0 The active energy measurement (Wh) shall be carried out on 3 phase 4 wireprinciple with an accuracy as per class 0.2S of IS 14697/IEC- 62053- 22 (2003) Inthe meters the energy shall be computed directly in CT/VT secondary quantitiesand indicated in Watt-hours. The meters shall compute the net active energy (Wh)

sent out from the Sub-Station during each successive 15 minute block, and storein its memory along with +/- sign. It shall also display on demand the net WH sentout during the previous 15 minute block, with a minus sign if it is a net Wh receipt.

7.0 Further, the meter shall continuously integrate and display on demand the netcumulative active energy sent out from the Sub-Station upto that time. Thecumulative Wh reading at each midnight shall be stored in the meters memory.The register shall move backwards when active power flows backwards into theSub-Station.


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8.0 The meter shall count the number of cycles in VT output during each successive15-minute block and divide the same by 900 to arrive at the average frequency.This shall be stored in the meter's memory as a 2-digit code, which shall bearrived at by subtracting 49 from the average frequency, multiplying by 50 andneglecting all decimals. For e.g. 49.89 Hz shall be recorded as 44. In case theaverage frequency is less than 49.0 Hz, it shall be recorded as 00. In case it is51.0 Hz or higher, it shall be recorded as 99. The average frequency of theprevious 15-minutes block shall also be displayed on demand in Hertz. Theaccuracy of the voltage measurement/computation shall be at-least 0.5%, a betteraccuracy such as 0.2% in the 95-105% range being desirable.

9.0 The meters shall continuously compute the average of the RMS value(fundamental only) of the three lines to neutral VT secondary voltage as apercentage of 63.51 V and display the same on demand.

10.0 The meter shall also compute the reactive power (VAR) on 3 phase 4 wireprinciple. Limits of error shall be corresponding to class 1.0 as per IS 14697 for

reactive energy for Indian manufacturers or half (50%) of those permittedcorresponding to class 2.0 for reactive energy as per IEC 62053-23 (2003) forforeign manufacturers, and integrate the reactive energy (VARh) algebraically in 2separate registers, one for the period for which the average RMS voltage is 103%or higher and the other for the period for which the average RMS voltage is below97%. The current reactive power (VAR) with a minus sign if negative, andcumulative reactive energy (VARh) reading of the 2 registers shall be displayedon demand. The readings of the 2 registers at each midnight shall also be storedin the meter's memory. In the meter, the reactive power and reactive energytransmittals shall be computed in VAR/VARh directly calculated in VT and CTsecondary quantities. When lagging reactive power is being sent out from the

Sub-Station. VAR display shall have no sign and VARh registers shall moveforward. When reactive power flow is in the reverse direction. VAR display shallhave a negative sign and VARh registers shall move backwards.

11.0 The meter shall fully comply with all the stipulations of IS 14697/IEC- 60687-2000(or latest revision) for class 0.2S for static watt-hour meters except thosespecifically modified by this specification. The reference ambient temperatureshall be 50 deg. C.

12.0 Error shall be as per IS-14697/ IEC- 62053- 22 (2003)for all power factor anglesfrom 0 deg. to 360 deg.

13.0 Each meter shall have a test output device (visual) for checking the accuracy ofactive energy Wh and reactive energy (VARh) measurement using a suitable testequipment. The test output shall be software configurable for active energyimport/export and reactive energy import/export.

14.0 No rounding off to the next higher last decimal shall be done for voltage andfrequency displays.

15.0 The three line to neutral voltages shall be continuously monitored by individualphase wise LED's, and in case any of these falls below 70%, the normally flashinglamp provided on the meters front becomes steady. The time blocks in which

such a voltage failure occurs/persist shall also be recorded in the meter'smemory. The lamp shall automatically resume flashing when corresponding VT


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20.0 A keypad or scrolling facility shall be provided on the front of the meter forswitching on the display of the meter parameters selected and for changing fromone indication to next.

21.(A) Meter shall have a non-volatile memory in which the following shall beautomatically stored.

21.1 Average frequency for each successive 15-minute block upto second decimal/asa two-digit code.

21.2 Net Wh transmittal during each successive 15-minute block upto seconddecimal/with plus minus sign.

21.3 Cumulative Wh transmittal at each midnight in 6 digits including one decimal.21.4 Cumulative VARh transmittal for voltage high condition, at each midnight in 6 digit

including one decimal.21.5 Cumulative VARh transmittal for voltage low condition, at each midnight in 6 digit

including one decimal.21.6 Date & time blocks of failure of VT supply on any phase, as a star (*) mark.21.(B) Battery backed memory shall not be accepted.

22.0 The meter shall store all the above listed data in their memories for a period of35 days. The data older than 35 days shall get erased automatically.

23.0 CMRI/DCD: To ensure inter operability of system at the meter reading instrumentend, the common meter reading instrument (CMRI) or data collection devices(DCD) confirming to DOS platform and having min. 16 MB memory shall be usedto enable different manufacturers to download into same hand held terminal & themeters of various makes to be read through the same hand held terminal. EachCMRI shall be complete with:-

i) a lead with optical head for coupling it to the meter,ii) a lead for plugging it to a personal computer;iii) an internal battery for powering the devices;iv) a case for safely carrying it aboutv) a battery charger

The total arrangement shall be such that one (1) operation can carry out thewhole operation, in about five (5) minutes per meter.

Portable Meter Reading Instruments (MRI)/data collection devices (DCD) shallhave a key for starting the data tapping from the coupled meters memory, a key

to start data transfer to the PC, and a lamp, which would light up on completion ofdata collection, remain on while the data is held in the device and would go offwhen all data has been transferred to the PC. Data tapping operation fromCMRI/DCD shall not erase the data from the meters memory, or effect the meteroperation in any way. The memory of the CMRI/DCD shall get automaticallycleared when the data has been transferred to the PC only then the CMRI/DCDshall accept data from another meter. CMRI/DCDs shall also have necessaryprovision for meter clock correction. CMRI/ DCDs shall be compatible with earliersupplied meters in regard to data downloading etc.

23.1 Each meter shall have an optical communication port compatible to RS 232 on its

front for tapping all data stored in its memory. In addition to the above each metershall be provided with a RS485 port on one of its sides, from where all the datastored in the meters memory can also be tapped Portable Meter Reading


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24.0 The whole system shall be such as to provide a print out (both from the local PCand the remote central computer) of the following form:

23 55 +16.28 56 +15.95 55 +15.32 54 +15.66

55 +14.93 55 +14.26 54 +14.85 56 +15.17

HVPNL **** 12345.6 01234.5 00123.4 99-04-28

57 +14.72 56 +13.83 55 +13.57 53 +12.9101 52 +13.34 51 +12.76 52 +14.11 52 +15.28

25.0 All the meters shall be identical in all respects except for their unique identificationcodes. They shall also be totally sealed and tamper proof, with no possibility ofadjustment at site except for a restricted clock correction.

26.0 The meter shall safely withstand the usual fluctuations arising during faults inparticular, VT secondary voltage 115% of rated applied continuously and 190% ofrated for 3 seconds and CT secondary current 150% of rated applied continuouslyand 30 times of rated applied for 0.5 seconds, shall not cause any damage to orthe mal-operation of the meters.

27.0 The meter shall continue to function for remaining healthy phase(s), in case offailure of one or two phases of VT supply. In case of a complete VT supply failure,the computation of average frequency (as per 8.0) shall be done only for theperiod during which the VT supply was available in the 15-minute block. Any timeblock contraction or elongation for clock correction shall also be duly accountedfor.

28.0 The harmonics shall be filtered out while measuring the Wh, VAR and VARh andonly fundamental frequency quantities shall be measured or computed.

29.0 VOID

30.0 VOID

31.0 Every meter shall be indelibly marked with connection diagram showing thephase sequence for which it is intended and shall be attached on the meters. Incase of any special precautions need to be taken at the time of testing the meter,the same shall be indicated alongwith the circuit diagram.

32.0 VOID

33.0 Sealing arrangement: Sealing arrangement for meters and TTBs shall beprovided as under:

33.1 TTBs: Each TTB shall have the provision for two seals.33.2 Meters: Meter body or cover & meter terminal blocks shall be sealable including

each optical communication port.

34.0 The meters shall be supplied housed in compact and sturdy; metallic or mouldedcases of non-rusting construction and/or finish. The cases shall be designed forsimple mounting on a plane, vertical surface such as a control/relay panel front.All terminals for CT and VT connections shall be arranged in a row along themeters lowerside. Terminals shall have a suitable construction with barriers andcover, to provide a secure and safe connection of CTs and VTs leads throughstranded copper conductors of 4.0 sq. mm. size.


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The meters shall also withstand without any damage or maloperation reasonablemechanical shocks, earthquake forces, ambient temperature variations, relativehumidity etc. They shall have an IP-51 category dust-tight construction, and shallbe capable of satisfactory operation in an indoor, non-air conditioned installation.

The contractor shall be responsible for total installation and commissioning of themeters (alongwith test blocks, if supplied separately)as per Owners advice,including unpacking and inspection on receipt at site, mounting the meters onexisting control and relay panels at an appropriate viewing height., connection ofCT and VT circuits including any required rewiring (however, supply & installationof 4cx4mm2 control cables (laid through 2.5 dia HDD PVC Pipe) from CT, VT tometering system are not in the scope of this specification), functional testing,commissioning and handing over. The Contractors personnel shall procure/carrythe necessary tools, equipment, materials and consumables (including insulatedwires, lugs, ferrules, hardware etc.).

35.0 Inspection & Testing:35.1 Type Tests:

The meter should be fully type tested as per IS 14697 for Indian Manufacturers orIEC-62053-22 (2003) & IEC-62053-23 (2003) for foreign manufacturers.

35.2 Routine Tests:

All Routine tests as per IS 14697 shall be carried out by the supplier on themetersfor compliance in both directions of power flow.

35.3 Acceptance Tests:

All equipment, after final assembly and before despatch from manufacturer'sworks shall be duly tested as per IS 14697 for compliance in both directions ofpower flow in presence of purchaser's representative, unless dispensed with inwriting by the purchaser. In addition, the following acceptance tests shall also beconducted:-

1. Functional checks for display and memory.2. Accuracy of voltage and frequency measurement.

All DCDs/MRIs after final assembly and before dispatch from Manufacturersworks shall be duly tested to verify that they are suitable for supply to thepurchaser. In particular, each and every DCD/MRI shall be subjected to thefollowing acceptance test:-

1. Functional checks2. Downloading Meter Data from the Meter(s).3. Compatibility with PC software4. Downloading the meter data on PC5. Functioning of advance and retard time commands.6. Per meter downloading time verification7. Capacity of DCD/MRI for data storage.

36.0 Quality Assurance

The quality control procedure to be adopted during installation of the specifiedequipment shall be mutually discussed and finalized in due course, generallybased on the established and proven practices.


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37.0 Any meter, which fails to fully comply with the specification requirements, shallbe liable to be rejected by the purchaser.

38.0 VOID

39.0 Following technical information shall be furnished by the bidders in theiroffers.:

39.1.1 The prospective bidder shall be required to submit complete type test reportsfrom Govt. approved laboratory alongwith bid. The type test reports shall not bemore than seven years old reckoned from the date of opening of part-1 tender.

39.2 Guaranteed Technical Particulars as per Annexure-I.

40.0 SERVICE CONDITIONS

Equipment to be supplied against this specification shall be suitable forsatisfactory continuous operation under the following tropical conditions:-

i. Location IN THE STATE OF HARYANA

ii. Max. ambient air temp (0C) 50iii. Min. ambient air temp (0C) -2.5

iv. Maximum Relative humidity (%) 100

v. Minimum Relative humidity (%) 26

vi. Average annual rainfall (mm) 900

vii. Max. wind pressure (Kg/sq.m.) 195

viii. Max. altitude above mean sea level(meters)

1000

ix. Isoceraunic level (days/year) 50

x. Seismic level (horizontal acceleration) 0.3g

Note: Moderately hot and humid tropical climate conducive to rust and fungus growth.The climatic conditions are also prone to wide variations in ambient conditions.Smoke is also present in the atmosphere. Heavy lightening also occur during Juneto October.


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One Block At the beginning of each day in Following Format:

Meter SerialNo MidNight Net Wh Reactive High Energy Reactive Low Energy Date

16 IP data in each row and total 6 rows for complete 24 hours data

Format for IP wise information:StartingHour AvgFreq StatusIndication NetEnergy AvgFreq StatusIndication NetEnergy ...

StatusIndication gives following Information:

* to indicate Supply Down.Supply failure might be momentary or might have lasted for several

rr to indicate time retard "aa" to indicate time advance

Sum of net energies(for 96 IP) at the end of last row of the day having complete 24 hours data

--*/


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Annexure II/* HeaderInformation */Meter Serial No.Load Survey Data From: 26/02/2010 To:01/04/2010

DateTimeSlot

CodedFrequency

NetWh

TimeRetard/Advance

PT StatusIndicator (for low

voltage indication)2/26/2010 0:15 49 15.78 aa *2/26/2010 0:30 23 9.64 rr *2/26/2010 0:452/26/2010 1:002/26/2010 1:152/26/2010 1:30

2/26/2010 1:452/26/2010 2:00

2/26/2010 2:152/26/2010 2:302/26/2010 2:452/26/2010 3:002/26/2010 3:152/26/2010 3:302/26/2010 3:452/26/2010 4:002/26/2010 4:152/26/2010 4:302/26/2010 4:452/26/2010 5:00

2/26/2010 5:152/26/2010 5:302/26/2010 5:452/26/2010 6:002/26/2010 6:152/26/2010 6:302/26/2010 6:452/26/2010 7:002/26/2010 7:152/26/2010 7:302/26/2010 7:452/26/2010 8:00

2/26/2010 8:152/26/2010 8:302/26/2010 8:452/26/2010 9:002/26/2010 9:152/26/2010 9:302/26/2010 9:452/26/2010 10:002/26/2010 10:152/26/2010 10:30

C:\Users\ITMS4\Desktop\IUM_Specification_(Jan-2012).doc 14


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2/26/2010 10:452/26/2010 11:002/26/2010 11:152/26/2010 11:302/26/2010 11:452/26/2010 12:002/26/2010 12:15

2/26/2010 12:302/26/2010 12:452/26/2010 13:002/26/2010 13:152/26/2010 13:302/26/2010 13:452/26/2010 14:002/26/2010 14:152/26/2010 14:302/26/2010 14:452/26/2010 15:002/26/2010 15:15

2/26/2010 15:302/26/2010 15:452/26/2010 16:002/26/2010 16:152/26/2010 16:302/26/2010 16:452/26/2010 17:002/26/2010 17:152/26/2010 17:302/26/2010 17:452/26/2010 18:002/26/2010 18:15

2/26/2010 18:302/26/2010 18:452/26/2010 19:002/26/2010 19:152/26/2010 19:302/26/2010 19:452/26/2010 20:002/26/2010 20:152/26/2010 20:302/26/2010 20:452/26/2010 21:002/26/2010 21:15

2/26/2010 21:302/26/2010 21:452/26/2010 22:002/26/2010 22:152/26/2010 22:302/26/2010 22:452/26/2010 23:002/26/2010 23:152/26/2010 23:302/26/2010 23:45



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2/26/2010 0:00Total

DateTimeSlot

CodedFrequency

NetWh

TimeRetard/Advance

PT StatusIndicator (for low

voltage indication)2/27/2010 0:152/27/2010 0:30

2/27/2010 0:452/27/2010 1:002/27/2010 1:152/27/2010 1:302/27/2010 1:452/27/2010 2:002/27/2010 2:152/27/2010 2:302/27/2010 2:452/27/2010 3:002/27/2010 3:152/27/2010 3:30

2/27/2010 3:452/27/2010 4:002/27/2010 4:152/27/2010 4:302/27/2010 4:452/27/2010 5:002/27/2010 5:152/27/2010 5:30

111 IUM Specification (Jan-2012)

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