TESTING LABORATORY

We put at your service a modern test laboratory amongst the best equipped in Northeast America.

We perform all tests on power transformers and equipment as per North-American and International standards such as IEEE, ANSI, CSA CEI or as per customer request.

  • Shock generator, 160kV / 120kJ/ 8 stages for basic impulse level (BIL & SIL) and power surge of maneuver, voltage class Uu to 350kV
  • Applied voltage test (Hi-Pot) 200kV / 200kVA
  • CA source for load losses and temperature rise tests (90kW)
  • Induced voltage tests (120Hz) up to 250kW with partial discharge measurements

POWER AND DISTRIBUTION TRANSFORMERS

ROUTINE TESTS (INDIVIDUAL TESTS)

  • Winding insulation resistance measurement;
  • Core insulation tests;
  • Power factor insulation measurement;
  • Single-phase excitation current measurement;
  • Winding resistance measurement;
  • Transformation ratio;
  • Polarity and phase verification;
  • No load losses and excitation current measurement;
  • Load losses and impedance calculation;
  • Lightning impulse (BIL) and switching surge (SIL)
  • Homopolar impedance measurement;
  • Power surge maneuver tests (345kV and higher);
  • Applied voltage at industrial frequency
    (Hi-Pot);
  • Induced voltage with partial discharge measurement tests;
  • On load and off-load tap changer operations;
  • Applied voltage on auxiliary circuits tests;
  • Dissolved gas analysis;
  • Tank and radiator sealing verification.

TYPE TESTS

  • Power surge maneuver tests;
  • Temperature rise and temperature rise overload tests;
  • Audible noise measurement.

SPECIAL TESTS

  • External radio disturbances measurement

DIAGNOSTIC

DETECTION AND LOCATION IN CASE OF FAULT DURING TESTS – EXTERNAL SERVICES

FAULT DURING INDUCED VOLTAGE TESTS:

DIAGNOSE AND LOCATE THE FAULT DURING TESTS WITH PARTIAL DISCHARGE MEASUREMENTS

  • Pattern Recognition in Partial Discharges (PRPD);
  • Locate fault with sensors;
  • If required, complement by multi-term electrical method;
  • A work report will be provided, confirming location of transformer internal fault if a signal is detected.

FAULT DURING BIL OR MANEUVER:

DIAGNOSE AND LOCATE THE FAULT

  • In case of a fault during BIL, a fault detection can be done;
  • Using of sensors;
  • A work report will be provided, confirming location of the transformer internal fault if a signal is detected.

Contact us for details