Test
We have successfully carried out corona and RIV test on 765 KV clamps and connectors, as per ANSI/NEMA CC1-20094
Tests Results of 765 KV Power Connectors
| Test | NEMA Requirement | Our test Results |
|---|---|---|
| Corona Extinction Voltage (KV) | 508 | 533 to 544 |
| RIV (Micro Volts) | 200 | 79 to 89 (at 440 KV) |
Corona and RIV Test on 500 KV Clamps and connectors as per ASNI/NEMA CCI at GPRI, Vadalore, India.
Short time current test as per BS159 -for 31.5 KA-3 Sec & 40KA-3 Sec at CPRI-Bangalore (Member of STLA LAB).
Short time current test as per BS159 - for 63 KA-1 Sec at ERDA - BARODARA
Temperature rise test as per ANSI/NEMA CC1-209 at CPRI-Bhopal on 132KV, 400KV and 765KV connectors-current rating upto 3750 Amps at CPRI-Bhopal, India. (member of STLA Lab). (Connectors tested at 20% less than the recommended torque).
Performance Test (Corrosion Test-300 Hrs) as per CS57-98 at Central Power Research Institute, Bangalore, India. (member of STLA Lab).
Measurement of resistance before and after temperature rise test as per BS159 at CPRI-Bhopal, India. (member of STLA Lab).
Torque strength on bolted connectors (150% of recommended torque) as per ANSI/NEMACCI & CS57-98 at Central Power Research Institute, Bangalore, India (member of STLA Lab).
Ultimate Torque strength on bolted connectors
(200% of recommended torque) as per CS57-98 at Central Power Research Institute, Bangalore, India.
Pull out strength test as per ANSI / NEMA- CCI at Central Power Research Institute, Bangalore, India.
Cantilever test on BVS support connectors as per ANSI/NEMA-CC at CPRI-Bangalore, India.
Testing facilities :
The following testing facilities will be available at our works
- Visual & Dimensional Check.
- Galvanising Test (Preece Test)
- Ultrasonic Testing (To detect the internal defects of Connector castings)
- Tensil Test (Slip Test)
- Pull out Strength Test
- Torque Strength Test on Bolted Connectors
- Lateral Lead Test stimulating short circuit mechanical force.
- Milli Volt Drop Test (resistance test) 100 Amps D.C. Source.
Type tests at STLA approved labs
Type tests on clamps and connectors up to 765 kV system voltage at STLA approved labs-CPRI-Hyderabad, CPRI-Bhopal, CPRI-Bangalore & ERDA - India
Type test on clamps and connectors up to 330 kV system voltage EDF-France
Type tested rating
| Short time current | Temperature rise test | Visual corona and RIV |
| 40Ka for 3 secs, 50Ka for 3 secs, 63Ka for 1 sec | Up to 4725 Amps | Up to 765 kv |
| Pull out strength test 8896 N | Cantilever test on bus supports 8896 N | Spacers - Compression & tension test As per IEC 61854 & IS 10162 |
Type tests at STLA approved labs
EDF-France-
Corona and RIV test
Short time current test
