Capacitor Laboratory

Laboratory also has facilities for undertaking tests on filter reactors and series damping reactors associated with LV capacitors. The laboratory with the unique facilities is the first of its kind in this part of the world. Recently, facilities for testing LV APFC panels have been augmented including temperature rise test.

RESOURCES

  • (a) Parallel Resonance Transformer of Rating: 50/40/30/20 kV ac, 6.8 MVA.
  • (b) Parallel Resonance Transformer rating: 70kV/38/16.5/7.1kVac, 1750KVA.
  • (c) HVDC Source of rating: 150 kV 500 mA.
  • (d) Discharge current test setup for Series Capacitors
  • (e) 3 Phase Transformer of rating: 975 KVA, 2.5kV ac.
  • (f) 3 Phase Transformer of rating: 610 KVA, 2640/1760/880Vac
  • (g)High Accuracy Capacitance/tan delta bridge system: Accuracy:3.5x10E-5.
  • (h) Standard Capacitor: 1000 pF, 25 kV.
  • (i) Precision Current Comparator up to 5000A.
  • (j) Hot Air Oven: 1.8m x 1.8m x 2.0m (W x D x H), Amb to 150°C, Accuracy: 1°C.
  • (k) Climatic test Chamber: Size: 2.00m x 2.20m x 2.50m (WxDxH),
  • Temperature: - 70°C to 100°C ± 1°C, Humidity: 10% to 95% ± 2% RH.
  • (l) Impulse generator of rating: 500 kV 15 KJ for HV capacitors
  • (m) Impulse generator of rating 18kV,100 Joules for LV Capacitors,
  • (n) 500 MHz Storage oscilloscope,
  • (o) Harmonics Generator and filter.
  • (p) 35kV DC, 1.1Amp HVDC Power Supply

MAJOR TESTS

  • Output test / Capacitance & tan delta test
  • High Voltage Tests
  • Short Circuit discharge test
  • Test for discharge device
  • Thermal stability test
  • Sealing test
  • Impulse voltage withstand test
  • Self healing test on MPP capacitors
  • Charge discharge test on LV capacitors
  • Destruction test on LV capacitors
  • Discharge current test for Series capacitors
  • Disconnecting test on Internal fuses
  • Electrical Endurance test for HV capacitors - Over voltage cycle test & Ageing test
  • Endurance test on LV capacitors -Ageing test, Charge discharge cycle test & destruction test

TESTING OF LV APFC PANELS

Tests on LV APFC panels are carried out as per IEC 61921, IEC 60439 and IS 16636. The temperature rise test will be carried out on APFC panels with all capacitor units, detuned/damping reactors, if any, and other components connected. Temperature rise test can also be carried at elevated ambient temperature of 55 °C.

ENVIRONMENTAL TESTS

  • Environmental tests are carried out on various switchgear and control gear as per IEC 62271-100,
  • Environmental tests on various equipment: Electrical, Mechanical, Automobile, Medical, ATMs, etc. as per various customer protocols.

TEMPERATURE RISE TESTS

  • Temperature rise test on Line Traps up to 4000 Amps
  • Temperature rise test and other relevant tests on detuned and harmonic reactor

RESEARCH AND CONSULATANCY

  • 1. Development of Indian Standard Specification for LV APFC Panels – Bureau of Indian Standards (BIS), New Delhi, Sponsored R&D project was completed and the standard IS 16636:2017 has been released by BIS, New Delhi.
  • 2. Development and demonstration of ultra-capacitors and lead-acid batteries based hybrid storage for a 3kW solar-powered micro-grid-IHRD project.
  • 3. Selection of appropriate type of LV capacitors for LV distribution system.
  • 4. Review of Specification for HV and LV capacitor banks
  • 5. Root cause analysis of premature failure of capacitors
  • 6. New product development
  • 7. Consultancy and field engineering services for On-Line partial discharge measurement on power transformers in services.
  • 8. Any specific problem of Power Capacitor Manufacturers, Utilities, Academic Institutions etc.

RANGE OF CAPACITOR TESTING

Capacitor Maximum Rating Standard
HV Shunt capacitors
(For Routine and Type tests)
3500 kvar, 16 kV, 50 µF IS 13925 Part 1 –2012 ,
IEC 60871-1 – 2014,
IEC 60871-4 – 2014,
IEEE Std. 18 – 2012
HV Shunt capacitors
(For Endurance test)
1000 kvar, 20 kV , 8µF
1000 kvar, 9 kV, 50 µF
IS 13925 Part 2 2002
IEC 60871-2 – 2014
HV Series capacitors
(For Routine and Type tests)
3500 kvar, 20 kV, 50 µF IEC 60143 – 1: 2015
IEC 60143 – 3: 2015
HV Series capacitors
(For Cold duty test)
1000 kvar, 16 kV, 12µF IEC 60143 – 1: 2015
IEC 60143 – 3: 2015
HV Capacitors for surge Protection. 0.33 µF, 40 kV IS 11548 – 1986
(Reaffirmed Mar 2006).
LV Motor capacitors 100 x 10 µF, 440 V ac IS 2993 – 1998.
IEC60252 -1-2001
LV fan motor Capacitors 100 x 10 µF, 440 V ac IS 1709 – 1984
(Reaffirmed Mar 2006
Amendment No. 2)
LV Capacitors for Lighting 100 x 10 µF, 440 V ac IS 1569 – 1976
(Reaffirmed 2001)
IEC 61048: 2015,
IEC 61049: 1991.
LV Power capacitors of self-healing type. 150 kvar, 1000 V ac IS 13340 Part 1:2012,
IS 13340 Part 2:2012
IEC 60831-1-2014
IEC 60831-2-2014
LV Shunt capacitors of non self – healing type. 150 kvar, 1000 V ac IS 13585 Part 1:2012
IS 13585 Part 2:2013
IEC 60931-1:1996
IEC 60931-2:1995
IEC 60931-3:1996
LV APFC Panels 800 kvar, 440 V IEC 61921-2017
IEC 61439-2011
IS 16636:2017
Capacitors for Power Electronics IEC 61071- 2017
Capacitors for Railway applications – Rolling Stock equipment IEC 61881- 2010

Contact Details

Dr.T. Bhavani Shanker
Joint Director/HoD
Capacitors Division
Phone: +91 (0) 80 - 2207 2321
Mobile: +91 9448141980
E-Mail : tbs@cpri.in

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