HIGH POWER LABORATORY

MAJOR PRODUCT / EQUIPMENT TESTED WITH APPLICABLE STANDARDS:

• Distribution and Power Transformers as per IS 1180, IS 2026, IEC 60076, ANSI & IEEE standards
• Medium voltage circuit-breakers as per IS/IEC 62271
• Reactors and Line traps as per IEC 60076-6
• Isolated phase bus-duct as per IS 8084 and IEEE standards
• LV Bus-ways as per IS/IEC 61439-6
• Current transformers as per IEC 61869-1 & 2
• Disconnectors and Earthing switches as per IS/IEC 62271-102
• AC Metal Enclosed Switchgear as per IS/IEC 62271-200
• Compact Sub-station as per IS/IEC 62271-202
• Lightning arresters as per IEC 60099-4
• Load Break Switches as per IS/IEC 62271-103
• GIS as per 62271-203 & 62271-204

Major tests Carried Out:

• Dynamic & Thermal ability to withstand the Short Circuit Test on Transformers, Reactors & Line Traps, Bushings, etc.
• Short-time withstand current test on switchgear equipment, short-circuit duty test on circuit breakers (T100a, T100s, T60, T30, T10), Line charging, Cable charging & Capacitor bank Switching duty tests, etc.
• Induced current switch duty test on Earthing switches
• Dynamic & Thermal Short-circuit tests on UG cables
• Short-Circuit test on Lightning arresters
• Internal arc test on HT Panels, Instrument Transformers, Motor & Generator terminal box, Distribution Transformers, etc.
• Short-Circuit Making test on Earthing switches
• Short-Circuit withstand test on Earthing Electrodes
• Short-circuit withstand test on Reactors and Line Traps

Range of the test ratings possible :

• Short-circuit breaking capacity test on Circuit-breakers up to 12kV/50kA, 22kV/21kA & 36kV/31.5kA ratings
• Dynamic & Thermal ability to withstand Short-circuit test on Power Transformers up to 250MVA 220kV/400kV Voltage Class
• Short-time withstand current test on HT Panels, LT & HT Bus-ducts up to 300kA for 1.0s, 175kA for 3.0s duration, Disconnectors and Earth switches up to 400kV class for 50kA rms for 3.0s, HT Reactor & Line traps, Current Transformers up to 800 1200kV Class, Power connectors, HT Bushings, Earthing Electrodes, Motor and Generator Terminal box, etc.
• Induced Current switching duty test on Earthing switches up to 765kV Class
• Internal arc current test on HT Panels, Compact sub-stations up to 44kA rms for 1.0s and 50kA for 0.3s
• Internal arc current test up to 40kA for 1.0s on Instrument Transformers (CT & PT) up to 400kV
• Power arc test on Insulators & Insulator strings up to 400kV rating for up to 25kA rms for 0.2s
• Making duty tests on Earthing Switches up to 12kV for 40kArms/100kAp & 36kV 26.3kArms/67kA peak
• Short-circuit test/pressure relief test on Lightning arresters up to 63kArms/0.2s up to 145kV Class
• Short-circuit withstand test on Reactors and Line Traps up to 63kA/1s

Photo Gallery

Transformer under Dynamic Short-circuit test.

Cable under Short-circuit withstand test.

Current Transformer under Short-time current test

Internal arc test on Indoor Medium Voltage Cubicle

Internal arc test in Motor Terminal Box

Short-circuit withstand test on Line Trap

Induced current Switching duty test on Earth Switch of Centre-break Disconnector

Power arc test on Insulator Tension string Assembly

Power arc test on Suspension string assembly

Dry type Transformer under Short-circuit test

Short-circuit duty test on Medium Voltage Switchgear

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