From the Desk of Managing Director - Amtech Electronics · 2019-05-08 · Date 31/01/17 AMBUJA...
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FOR PRIVATE CIRCULATION ONLY JULY 2017 Official News Letter of Amtech Electronics (India) Ltd., Gandhinagar, Gujarat (India) AN ISO 9001 : 2008 COMPANY QM 003 Piyush Patel Page 2 Customer’s Voice Page 3 Page 4 Appl. Case Study Page 5 Amtech Power Page 6 Product Overview Page 7 Page 8 Presence Across the Nation Inside Editor: Atul Suthar From the Desk of Managing Director Start everyday with a new hope. Leave bad memories behind and have faith for a better tomorrow Techno-Talk Digital Excitation & Control System DEC-250 The butcher asks you,“Did you see the cow here? Which way did it go?” What will be your answer? If you say “I don't know”, you are a liar. If you tell him the truth, the cow will be killed and your non-violence principle will be defeated. But Gandhiji was very clear on his principles. He replied instantly, I will tell the butcher, “I know by which road the cow went, but I will not tell you.” Morale: A true follower of the principles does not waver in the odd situations. Someone wanted to test Mahatma Gandhi, knowing that he has two principles, non-violence and truth. He asked Mahatmaji, “Suppose a cow is running away from a butcher. She comes across a junction of two roads, one going to the right and other going to left. She takes one of the roads. Chasing her, the butcher comes there. You happen to be at that point and you know which way the cow has gone”. Energy saving in ID fan Grabbing Crane Modernization Your Valuable Feedback On 2 July 2017 entered in to 31 year of its nd st Amtech Electronics (India) Limited successful industrial career, as a leading manufacturer in Motion Control Systems. Since its inception on 2 July 1987 Amtech went from strength to strength, in terms of product range, nd customers served, manpower employed, manufacturing and R&D infrastructure developed---in all walks of its industrial life. “I am thankful to my team members who were with us, who are with us and who will be with us, in our journey full of milestones of achievements” said Mr. Piyush Patel, the Managing Director of Amtech Group of Companies, during celebrations of the Foundation Day. CELEBRATIONS OF THE FOUNDATION DAY Our honorable Prime Minister Shri Narendra Modi established 21st June as International Yoga Day. In tune with that Amtech celebrated Yoga Day in its own premises. Amtech team members participated with full enthusiasm in organized Surya-Namaskars during the event. A two days In-house Training Program, on “Harmonics and their Mitigation through Active Harmonic Filter” was conducted in Amtech Training Center on 22nd and 23rd June 2017. Engineers from Atandra Energy Pvt Ltd attended it. Some fundamental questions and answers Product Overview Grabbing Crane Modernization
Transcript of From the Desk of Managing Director - Amtech Electronics · 2019-05-08 · Date 31/01/17 AMBUJA...
FOR PRIVATE CIRCULATION ONLY JULY 2017
Official News Letter of Amtech Electronics (India) Ltd., Gandhinagar, Gujarat (India)
AN ISO 9001 : 2008 COMPANYQM 003
Piyush Patel
Page 2
Customer’s Voice
Page 3
Page 4
Appl. Case Study
Page 5
Amtech Power
Page 6
Product Overview
Page 7
Page 8
PresenceAcross the Nation
Inside
Editor:Atul Suthar
From the Desk of Managing Director
Start everydaywith a new hope.
Leave badmemories
behind and havefaith for a better
tomorrow
Techno-Talk
Digital Excitation &Control System
DEC-250
The butcher asks you,“Did you see the cow here? Which way did it go?” What willbe your answer? If you say “I don't know”, you are a liar. If you tell him the truth,the cow will be killed and your non-violence principle will be defeated. ButGandhiji was very clear on his principles. He replied instantly, I will tell the butcher,“I know by which road the cow went, but I will not tell you.”
Morale: Atrue follower of the principles does not waver in the odd situations.
Someone wanted to test Mahatma Gandhi, knowing thathe has two principles, non-violence and truth.
He asked Mahatmaji, “Suppose a cow is running awayfrom a butcher. She comes across a junction of tworoads, one going to the right and other going to left. Shetakes one of the roads. Chasing her, the butcher comesthere. You happen to be at that point and you know whichway the cow has gone”.
Energy saving inID fan
Grabbing CraneModernization
Your Valuable Feedback
On 2 July 2017 entered in to 31 year of itsnd st
Amtech Electronics (India) Limitedsuccessful industrial career, as a leading manufacturer in Motion Control Systems. Since itsinception on 2 July 1987 Amtech went from strength to strength, in terms of product range,
nd
customers served, manpower employed, manufacturing and R&D infrastructuredeveloped---in all walks of its industrial life. “I am thankful to my team members who werewith us, who are with us and who will be with us, in our journey full of milestones ofachievements” said Mr. Piyush Patel, the Managing Director of Amtech Group ofCompanies, during celebrations of the Foundation Day.
CELEBRATIONS OF THE FOUNDATION DAY
Our honorable Prime Minister Shri NarendraModi established 21st June as InternationalYoga Day. In tune with that Amtechcelebrated Yoga Day in its own premises.
Amtech team members participated with fullenthusiasm in organizedSurya-Namaskarsduring the event.
A two days In-house Training Program, on“Harmonics and their Mitigation throughActive Harmonic Filter” was conducted inAmtech Training Center on 22nd and 23rdJune 2017.
Engineers from Atandra Energy Pvt Ltdattended it.
Some fundamentalquestions and answers
Product OverviewGrabbing CraneModernization
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CUSTOMER’S VOICE
This is to certify that we are using wide range of Amtech make AC VFD from 5.5 kW to 250 kW for variousApplication and Active Harmonic Filter supplied by M/s Amtech Electronics India Ltd Gandhinagar,“ ”Gujarat the details stated as under.
kW & Model Quantity Application
1. 250 kW (AMT-250-4) - 2 Nos - FD fan (CPP)
2. 132 kW (AMT-132-4) - 4 Nos - ID fan & PAFan (CPP) & Bag Filter
3. 110 kW (AMT-110-4) - 1 No. - Bag Filter & Compressor
4. 75 kW (AMT-75-4) - 2 Nos. - Bag Filter
5. 15 kW (VT-240S 015H) - 1 No. - Biomass Belt Feeder (CPP)
6. 7.5 kW (VT-230S 7P5H) - 1 No. - Biomass Belt Feeder (CPP)
7. 5.5 kW (VT-240S 5P5H) - 2 Nos. - Drag Chain Feeder (CPP)
8.Active Harmonic Filter - 1 No. - CPP
200AMP
AboveAC Variable Frequency Drive and Harmonic Filter are running successfully since 2012 and aftersales service support also good.
G. L. Suthar (HOD E&I)
Ambuja Cements Ltd. (Unit Ropar) Panjab
To Whom It May Concern
Date 31/01/17
AMBUJA CEMENTS LIMITED(Unit Ropar)
Village - Daburji, P.O. Lodhimajra Distt. Ropar - 140 113 (Panjab)Phone : 01881 - 274287, Fax : 274018, 276034
(Regd. Off. : P.O. Ambuja Nagar, Taluka - Kodinar, Distt. Junagarth, Gujarat - 362 715)
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TECHNO-TALK
Title : Some fundamental questions and answers
1. Whether fuse should be connected at load -end or source-end?
Fuse should be connected at source-end. At this location it will be able to protect from any short circuit in the cable atany point between source and load.
2. Whether Power Factor (PF) capacitor should be connected at load - end or source- end?
PF capacitor should be connected at load end. At this location, it will be able to avoid power loss in cable, as cable willnow carry less current due to reactive current compensation given by PF capacitor.
3. Why any equipment has to be derated at higher altitudes (typically at more than 1000 meters altitude)?
At higher altitudes air density reduces. Hence air available for cooling reduces. This reduces cooling provided by theair to the equipment. Hence the equipment cannot work at its rated capacity. Therefore it has to be derated at higheraltitudes.
4. Why high efficiency motors sometimes result in more power consumption than conventional motors?
High efficiency motors have lower slip than conventional motors. This results in high efficiency motors running atslightly higher speed than conventional motors. Centrifugal loads like fans, blowers, pumps, compressors etc.typically have their power consumption proportional to the cube of the speed at which they work. Hence with highefficiency motors they consume more power.
Consider the following example:
Conventional 2 pole motor, having efficiency of 85%, rotating at 5% slip. connected to load consuming 100 kW power,
Speed of motor = 1500 (1 - 0.05) = 1425 RPM
Input power = 100 / 0.85 = 117.6 kW ---------------------------------------------------------------(1)
High efficiency 2 pole motor, having efficient of 90%, rotating at 2% slip, connected to same load.
Speed of the motor = 1500 (1-0.02) = 1470 RPM.
Now the power consumed by load, being proportional to cube of the speed,
= 100 (1470 / 1425) 3 = 109.8 kW
Hence input power = 109.8 / 0.90 = 122 kW ---------------------------------------------------------(2)
From (1) and (2) even if high efficiency motor is used its consumption will be 4.4 kW more then conventional motor, forcentrifugal type of loads.
5. Why two capacitors connected in series to share the voltage, need to be connected with resistors across
them?
Consider the following example:
Two capacitors 1000 uF/ 400 V are connected in series and put across 700 VDC voltage. Their leakage resistance isnot identical, they are 1 Mohm and 1.3 Mohm respectively.
Hence voltage across first capacitor will be = 700 x (1 / (1 + 1.3)) = 304 V
The voltage across second capacitor will be 396 V
The voltage difference between two capacitors will be 92 V---------------------------------(1)
Hence they will share the voltage unequally and one capacitor may even exceed its rated voltage. Now suppose, thecapacitors are shunted with 100 k resistance each, with 5% tolerance.
Hence their values in the worst case can be 95 k and 105 k. These resistors will be in parallel with the leakage resistorsof each capacitor.
The equivalent resistor across first capacitor will be = 95 x 1000/ (95 + 1000) = 86.8 k
The equivalent resistance across second capacitor will be = 105 x 1300/ (105 + 1300) = 97.1 k
Hence now the voltage across first capacitor will be = 700 x (86.8/(86.8 + 97.1)) = 330 V
Voltage across second capacitor will be 370 V
The voltage difference between two capacitors will be 40 V --------------------------------(2)
From (1) and (2) the voltage difference between two capacitors will be drastically reduced, even if we have taken theworst possible combinations of capacitors and resistors across them.
Hence now the capacitors will operate in safer operating conditions w. r. t. Voltages across them.
Additional advantage of resistors across capacitors is, when the 700 V across them is switched OFF the capacitorscan discharge to safe voltage value in about five minutes time, in this case.
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Payback period approximately 4-6 Months
APPLICATION CASE STUDY
Title : Energy saving in ID fan DOC.NO. : CS-243
Industry : Cement
Application : ID Fan
Motor rating : AC Induction Motor, 3-Phase
30kW :
415Volt :
1480RPM :
50Hz :
52Amp :
Previous system : Motor was running on DOLstarter.
Problem observed : 1. High maintenance cost.
2. Energy losses due to flow control by damper
Present system : Amtech 37 kW, VT240S VFD used in place of DOLstarter.
kW (Consumption) Damper Position
Previous system (Without drive) : 29.5 kW 85% Open
Present system (With drive) : 22 kW 100% Open
System block diagram :
Merits of new system : 1. Easy & smooth operation.
2. Energy saving due to flow control by VFD.
Economical analysis :
�Energy consumption without VFD- P1 = 29.5 kW
�Energy consumption with VFD - P2 = 24 kW
�Energy saving per day ((P1-P2)*24) = 132 Units.
�Saving per day @ Rs.5/- Unit = Rs.660/-
�Saving per year (Approx. 320 Days) = Rs.2,11,200/-
30 kW, 3-PHASEINDUCTION MOTOR
AXPERT-VT240S
3-PHASE,
415 V,
AC SUPPLY
37 kW
ID FAN
AMTECH POWER VISION
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Title : Digital Excitation and Control System DECS-250 Continued from June 2017 newsletter
Limiter functions:
- V/Hz limiter - Over excitation limiter
- Under excitation limiter - Stator current limiter
- Var Limiter to limit the amount of reactive power exported from the machine
Protection
- Loss of sensing - Generator reverse power
- Generator over voltage - Generator reverse var
- Generator under voltage - Exciter �eld overvoltage
- Generator over frequency - Exciter �eld overcurrent
- Generator under frequency - Loss of PMG
- Exciter diode open detection - Exciter diode short detection
- User programmable protection
All of the generator protective features will have two settings groups.
Diagnostics and event recording
� Real time monitoring
� Oscillography
� Sequence of events
Communications
� The digital excitation system will have the following communications available:
� USB communication for interface with a local PC
� CANBUS communication for interface with additional remote I/O
� Standard 100 base T Ethernet communication for Modbus™ TCP communications as well as interface with PCsoftware.
� RS-485 communication for Modbus RTU communications
� Optional Pro�bus communication
� Optional 100 base T Ethernet communication
Physical requirements
HMI
The digital excitation system will have a 128 X 64 pixel LCD for viewing and changing settings, alarms, status andmetering data. In addition, six LED indicators will be located on the front of the unit and will indicate the followingconditions:
Null Balance
- PSS active
- Internal tracking
- Pre-position
- Lower limit
- Upper limit
The digital excitation control system will have a six-pushbutton interface to scroll, select and edit parameters.
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PRODUCT OVERVIEW
Title: Grabbing Crane Modernization
Frequent Problems in grabbing cranes are:�The original system in grab control uses a differential limit switch to get open/close positions & these positions cannot be
changed.As this system is purely mechanical, setting the position is a tedious process. The position of the switch can getdisturbed over multiple operations & to be re-set again
�Power & Rotor resistance contactors often required to change due to frequent operations�Slip-ring, carbon brushes maintenance�Arching, bigger size and bulkiness of motor puts extra load on trolley and bridge�Frequent problems in slip ring motors due to single phasing�Burning of resistor box�Regular maintenance of current carrying contacts of contactor due to frequent braking and reversal involved�Motor & Gear box coupling bolts damages & respectively motor & gearbox damage due to jerky operations�Hoist & Grab wire rope broken out due to uneven load sharing�Poor life of brake shoe as brakes used for braking the speed
The new generation of control and monitoring system, developed by , integrates theAmtech Electronics (India) Ltdoperation of EOT crane with four rope grabe by using variable frequency drive, Crane controller for controlling andmonitoring.Grabing crane used to handle the powder material, having four rope which operates hoisting and grabing operation.Synchronization of this operation was carried out by differential gearbox. Being mechanical synchronization, it pronesto backlash and takes lot of time to re-synchronize. Amtech has developed and successfully installed automationsystem for the grabbing crane. Automation system control the synchronization and whole crane operation like CrossTravel, Long Travel, Hoisting, Grabbing and safety interlocks. Automation system is using properly sized variablefrequency drive for existing slip ring motor or new induction motor to control the operation. PLC system take care ofSpeed control, Thruster control, Synchronization and Various interlocks.
Grab crane is a type of crane used in Cement, Metal industry, Ports etc. for handling of material in powder form. The grabmechanism is just like two jaws hinged at mid-point, used to grab the material. This mechanism can be operated by eitherhydraulic or electrical system. In Hydraulic system the grab jaws are operated by hydraulic cylinders. In case of electricalsystem, there are two rope & drum assemblies on the crab trolley. The grab operation gets carried out by one of the rope &drum assembly used to hoist the grab which in turn, gets driven by electrical motor. The motors get controlled by drive toallow multiple speed operations.
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Name & Signature: Designation: Date:
Contact Number: Email:
PRODUCT OVERVIEW
Features�Retrofitting the crane using existing slipring motor/new induction motor
and removed the mechanical differential gearbox limit switch operation.�Close loop control with encoder feedback from rope drum, to
synchronize the Hoisting and Grabbing operations with proper loadsharing
�For the crane operator, the crane works as if there were only a singlehoisting device with the additional functions of “open” and “close”.Setting the nominal grab positions only has to be performed once after achange of a rope or grab unit.
�Latest series Variable frequency drive with state-of-the-art engineeredpanel with protection of crane vibration and dusty environment, ensurestrouble free operation of the crane.
�Operator cabin is equipped with monitoring system, which gives statusof whole crane operation to make the ease of operation for operator.
�User friendly HMI provides powerful diagnostic in case of any problem to reduce the downtime.�Variable frequency drive control eliminates the problems of slip-ring motor contactor, resister and thruster brake.
Benefits�Assistance from concept to commissioning�New system with existing components�Minimized maintenance reduces the cost and provides more up
time�Ease of setting Open/Close limits through HMI instead of
adjustment of mechanical limit switch.�Optimized four-rope grab control minimizes cycle time and
reduces stress on ropes�Higher reliability - Less Mechanical wear / tear – more uptime�Full motor protection�Smooth crane operation�Electronic braking hence reduced maintenance of brake�Energy saving�Easy troubleshooting�Quick and safe commissioning�Qualified after-sales service
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OPEN/CLOSEROPE DRUM
HOLD DRUM
HOIST PULLEY
OPEN/CLOSE PU
GRAB CLOSEDGRAB OPENED
Gandhinagar
Atlanta
GandhinagarAhmedabad
Mumbai
Surat
MuzaffarnagarDelhi(Gurgaon)
Vadodara
Indore
Jamnagar
Udaipur
Kolkata
Nagpur
Pune
Hyderabad
Vapi Raipur
Bhopal
Jamshedpur
JaipurLucknow
Vizag
Bangalore
Chennai
Belgaum
PondicherryTrichy
AurangabadNasik
Chandigarh
Veraval
PRESENCE ACROSS THE GLOBE
Book - PostTo
From
Works & Regd. Office :
Amtech Electronics (India) Ltd.E-6, GIDC Electronics Zone,
+91 79 23289101, 23289102, 23289103+91 79 [email protected]
PhoneFaxE-MailWeb
::::
Gandhinagar-382 028, Gujarat (India)
Head Office
Branch Office
Dealer
System Integrator
Resident Engineer
Global Distribution
M. D. Kamath
-
Regional Offices
Contact Person Phone No. (O) Mobile No. E-mail
022-28846083Vrajesh Yadav 09819900501
09108051977
09582888030
Mumbai
Bangalore
Chennai
Delhi
-
-
T. S. Sridhar 044-26358919 09840618533
.
Umesh Bhatia 09589344318Indore / Raipur [email protected]
S. Senthil Kumar 044-26358919 09940229955 [email protected]
H.O. and Service Center
Contact Person Phone No. (O) Mobile No. E-mail
Bhavana Thakkar 09909975944H.O. Gandhinagar [email protected]
Rajesh Moradiya 09909973780Amtech Service CenterGandhinagar
G. Sateesh Kumar 09573900222Hyderabad [email protected]
Kaushik C. 09932820680Kolkatta [email protected]
