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Products Testing
Transformers
I) Routine tests
  • a-Measurement of winding resistance (IEC 60076-1 par. 10.2).
  • b-Measurement of voltage ratio and check of phase displacement (IEC 60076-1 par. 10.3).
  • c-Measurement of short-circuit impedance and load loss (IEC 60076-1 par. 10.4).
  • d-Measurement of no-load loss and current (IEC 60076-1 par. 10.5).
  • e-Dielectric routine tests (IEC 60076-3).
  • f-Tests on on-load tap-changers, where appropriate (IEC 60076-1 par. 10.8).

II) Type tests
  • a-Temperature-rise test (IEC 60076-2).
  • b-Dielectric type tests (IEC 60076-3).

III) Special tests
  • a-Dielectric special tests (IEC 60076-3).
  • b-Determination of capacitances windings-to-earth, and between windings.
  • c-Determination of transient voltage transfer characteristics.
  • d-Measurement of zero-sequence impedance(s) on three-phase transformers (IEC 60076-1 par. 10.7).
  • e-Short-circuit withstand test (IEC 60076-5).
  • f-Determination of sound levels (IEC 60551).
  • g-Measurement of the harmonics of the no-load current (IEC 60076-1 par. 10.6).
  • h-Measurement of the power taken by the fan and oil pump motors.
  • i-Measurement of insulation resistance to earth of the windings, and/or measurement of dissipation factor (tan δ) of the insulation system capacitances. (These are reference values for comparison with later measurement in the field. No limitations for the values are given here.)
  • j-Measurement of the level of the partial discharges (which are localized electrical discharges in insulating media of the transformer) test according to IEC 60270

Matelec has 4 electrical tests laboratories as follows:
  • Laboratory N1 (distribution transformers p to 2500kVA /36kV) :
    The test of par. I , II , III-b, III-d, III-f, III-g, III-h, III-i could be implemented in this platform.
    In addition, we are equipped to perform the partial discharges (which are localized electrical discharges in insulating media of the transformer) test according to IEC 60270
  • Laboratory N2 (distribution transformers up to 2500kVA /36kV) :
    The test of par. I , II , III-b, III-d, III-f, III-g, III-h, III-i could be implemented in this platform.
  • Laboratory N3 (power transformers up to 40MVA /72.5kV):
    The test of par. I , II , III-b, III-d, III-f, III-g, III-h, III-i could be implemented in this platform.
  • Laboratory N4 (power transformers up to 120MVA /245kV):
    The test of par. I , II, III-a , III-b, III-d, III-f, III-g, III-h, III-I, III-J could be implemented in this platform.
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