Testing power transformers
Transformer diagnosis
Neka carries out complete diagnosis of transformers and bushings.
We can perform;
-
Capacitance and power factor/dissipation factor measurement
-
DC winding resistance measurement and OLTC verification
-
Transformer turns ratio (TTR) measurement
-
Exciting current measurement
-
Short-circuit impedance / leakage reactance measurement
-
Frequency response of stray losses (FRSL) measurement
-
Demagnetization
-
Online and offline partial discharge testing
Transformer diagnosis
According to IEC 60076-11 and IEEE Std C57.12.01, partial discharge (PD) testing is mandatory for dry-type transformers on all high-voltage windings with Um > 3.6 kV.
High voltage insulation test
12 kV (20-400 Hz) with TD diagnosis
Insulation test with measurement of loss factor (TD), capacitance and impedance.
Reveals aging and weaknesses in the insulation of power transformers, transformer bushings, circuit breakers and arresters.