Test Equipment Capabilities

60 Hz applied alternating voltage series resonant test supply:

  • 2 reactor modules in series rated 800 kV 5 A, capacitance range 0 to 14.5 nF;
  • 2 reactor modules in parallel rated 400 kV 10 A, capacitance range 0.2 to 66.3 nF;
  • Test system partial discharge ≤2 pC measured with Omicron mtronix MPD600;
  • Used with 50 pF compressed gas standard capacitor rated 600 kV;
  • Operation available at frequencies other than 60 Hz.

Applied direct voltage ± 1,200 kV 20 mA test supply:

  • Polarity reversal <2 minutes for 2.8 nF at 1,200 kV;
  • Polarity reversal <2 minutes for 11.3 nF at 625 kV;
  • Suitable for use in partial discharge measurements on transformers and bushings rated 500 kVdc.

360 kJ impulse generator:

  • 2,400 kV lightning full wave impulse;
  • 2,400 kV triggered chopping gap;
  • 1,300 kV switching impulse;
  • 12 stages (200 kV, 30 kJ per stage);
  • Resistors: 168 wave front / 48 wave tail;
    Glaninger circuit;
  • 2,400 kV compensated voltage divider;
  • Multi-channel precision digital impulse analyzing system (12 bit).

Power transformer test system:

  • 690 V 4 MVA voltage source converter ≤ 5% THD (40 Hz – 200 Hz);
  • 4 MVA step-up transformer with 52 off-voltage taps 1.55 kV to 170 kV (boost to 190 kV short time);
  • 120 MVAr capacitor bank for use during load loss and temperature rise tests, max. 42 kV 3-ph or 48 kV 1-ph;
  • 2-stage 200 kV 2,000 A current transformers and 200 kV compressed gas capacitors used in power measurement;
  • Accuracy of power measurement is better than 0.13% at 0.05 power factor;
  • Filters to facilitate partial discharge measurements <10 pC during induced tests;
  • Oil processing and testing capabilities.

Accelerated aging facilities for stator bars and coils:

  • 50 V 60 Hz 6,000 A supply for thermal cycling;
  • 50 kV 60 Hz 28 kVA supply for voltage endurance with inductive compensation;
  • Unity power-factor voltage regulator.