Supplementary Test Laboratory

Besides catering to Routine Tests as per requirements of all follow-up tests for the short circuit tests taken up in the other two Short-Circuit Testing Laboratories (Test station-I & II), this laboratory facilities were extended/ developed to take up a number of type tests on LV & HV electrical equipment.

Presently, the facilities are divided in the following laboratories:

• High Voltage Lab
• Temperature Rise Test Lab
• CT and VT Test Lab
• Partial Discharge Lab
• Mechanical and Electrical Endurance Lab
• ACB, MCCB, MCB, RCCB, Contactors and Fuse Test Lab
• IP Test lab

TEST FACILITY:

• Lightning impulse Withstand and Flashover Test. (upto 50MVA, 220kV Class on transformers and 400kV class on switchgears and disconnectors)
• Power frequency voltage withstand test.(Dry & Wet)
• Temperature rise test (for LT/HT Switchgears upto 25 kA & Transformers upto 20 MVA).
• Routine and type tests on Current Transformer upto 25000 Amps and Voltage Transformer upto 132kV Class Test Facility.
• Ingress Protection against solid and liquid particles upto IP 68.
• Partial discharge test upto 100kV.
• Environmental & Humidity test.
• Induced over voltage test.
• All Tests on LT ACB/MCCB/Fuses/RCCB/MCB barring SC & EMI/EMC Facility.
• Mechanical Endurance Test Set on LT Switchgear and HT Switchgears

Equipments Facility :

• 350 kV, 250 kVA High Voltage transformer of Kirloskar Make.
• 2400 kV, 240 kJ impulse generator of BHT make.
• 800 kV, 20 kJ impulse generator of Haefely make.
• 35kV, 100 J impulse generator for testing HT & LT equipments of Haefely Make.
• High current transformers and regulators for temperature rise upto 25 kA. The set-up is unique in India.
• High current transformers and regulators for temperature rise upto 10 kA and 2000 A.
• Multiple current injection set for temperature rise of LT switchgears to feed rated current in each feeder (Make: Sarman).

• The CT-PT test set-up for tests upto 25000A CT primary current and 132kV PT primary voltage respectively. The measuring equipments are microprocessor based of Tettex make and has a very high accuracy.
• Resistance and reactance banks for electrical endurance tests on equipments rated upto 630A, 415V.
• Timers and PLCs for mechanical endurance and other sequential tests.