The maintenance of your electrical installations avoids the risks, to guarantee the safety of the people, to optimize the operation of your equipment and to increase its lifetime.

ERE Qualifelec Maintenance

– Preventive and curative maintenance
– Installation audit
– Mechanical and electrical tests
– Decontamination of transformers
– Maintenance on cells and transformers
– Oil analysis and treatment
– Transformer testing
– Isolation tests

Type Tests:

Temperature-rise type test (IEC 60076-2).
Dielectric type tests (IEC 60076-3). Lightning impulse test

Determination of sound level for each method of cooling for which a guaranteed sound level is specified. (IEC 60076-10)

Special Test:

Short-Circuit withstand test

Routine Test (According IEC 60076-1):

11.1 General requirements for routine, type and special tests
11.2 Measurement of winding resistance
11.3 Measurement of voltage ratio and check of phase displacement
11.4 Measurement of short-circuit impedance and load losses
11.5 Measurement of no-load losses and current
11.6 Measurement of zero-sequence impedance(s) on three-phase transformers
11.7 Tests on on-load tap-changers – Operation test

11.8 Leak testing with pressure for liquid-immersed transformers
11.9 Vacuum deflection test for liquid immersed transformers
11.10 Pressure deflection test for liquid immersed transformers
11.11 Vacuum tightness test on site for liquid immersed transformers
11.12 Check of core and frame insulation

ERE - Maintenance Transformateur