Power Factor / Grading Capacitance Measurement – AIS
Measuring the power factor, or the dissipation factor, also known as the tangent delta (tan δ), provides effective means for verifying the integrity of the insulation condition of circuit breaker components. In particular, the insulation condition of dead tank high voltage breaker bushings should be verified with this measurement. On dead tank breakers this measurement method is used to verify the insulation condition of the bushings by detecting deterioration in capacitive layers. On life tank high voltages breakers this measurement method is used to evaluate the capacitance of grading capacitors. If the measurement is performed outside of mains frequency, interferences from nearby live station components can be filtered out and minimized. Measuring over a range of frequencies provides better insight into the insulation condition.
Expert recommends
CPX 200 + HVX10
Combining CPX 200 and HVX10 enables high-precision capacitance and power/dissipation factor measurements for circuit breakers up to 10 kV, covering a frequency range of 1 Hz to 600 Hz. Four integrated measurement channels let operators guard the interrupters instead of grounding them, ensuring maximum accuracy.
HVX10
Mounting kit for 19-inch racks
With four measurement inputs, CPX 200 + HVX10 offers a powerful dual benefit: it precisely measures interrupter timing while actively safeguarding grading capacitors – all inside one smart solution.
Benefits of this solution
High level of mobility
One system – multiple tests
Accurate and flexible
Other solutions
TESTRANO 600 + CP TD12/15
TESTRANO 600 can be used to comprehensively test power and distribution transformers, which can measure frequencies from 15 Hz to 599 Hz. When combined with the CP TD12/15, the device provides powerful insights into the insulation condition of high voltage components.
