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Testsystem for sluttkontroll og tilstandskontroll av viktige komponenter i høyspenningsnettet


Med vårt nye testsystem fra Omicron kan vi tilby en rekke ulike tester for de fleste ulike komponentene som finnes i transformatorstasjoner og kraftverk. Med dette systemet kan vi utføre testing i forbidelse med sluttkontroll eller tilstandskontroll av krafttransformatorer, måletrafoer(CT&VT), effektbrytere, jordingsanlegg og impedansemålinger av linjer/kabler.


Komponenter som kan testes med systemet:

Krafttransformatorer:

  • DC winding resistance up to 100 ADC

  • Transformer demagnetization

  • Dynamic load tap changer diagnostics (on load tap changer test) up to 100 A DC

  • Transformer turns ratio (TTR) per tap up to 2 kVAC including polarity and excitation current

  • IEC 61387-1 support for transformer with unconventional vector groups

  • Automatically determination of the transformer’s vector group with CP SB1

  • Leakage reactance / short circuit impedance up to 6 AAC

  • Transformer, bushing: power/dissipation factor + insulation capacitance up to 12 kV, 300 mA | frequency from 15 Hz to 400 Hz |

  • Excitation current per tap up to 12 kV, 300 mA |

  • Surge arrestors: leakage current and watt losses up to 12 kV, 300 mA

Strømtrafoer:

  • CT ratio (with burden) up to 800 A

  • CT burden up to 6 A AC

  • CT excitation curve (knee point) up to 2 kVAC

  • Polarity check up to 800 A

  • Accuracy limiting factor (ALF) test

  • CT ratio with voltage up to 130 VAC | bushing CTs >

  • CT winding resistance up to 6 A DC

  • CT demagnetisation and remanence

  • CT voltage withstand test up to 2 kVAC

  • CT ratio Rogowski

  • CT ratio low power up to 800 A

  • Power/dissipation factor test up to 12kV

  • IEC 61850 Sampled Values testing

Spenningstrafoer:

  • VT ratio up to 2 kVAC | polarity and burden

  • VT burden up to 130 V AC | secondary

  • VT secondary voltage withstand test up to 2 kVAC

  • Polarity check with CPOL2 up to 2 kVAC

  • VT electronics up to 2 kVAC

  • IEC 61850 Sampled Values testing

  • Power/dissipation factor test up to 12 kV

Jordingsanlegg:

  • Ground grid impedance for large systems up to 100 A

  • Step and touch voltage up to 100 A

  • Ground grid impedance for small systems up to 6 AAC

  • Soil resistivity up to 6 AAC

  • Integrity check of grounding connection up to 400 ADC

  • Reduction factor / current split factor

  • Measure multiple current paths with Rogowski coil

Linjer/kabler:

  • Line impedance and k-factor up to 100 A of overhead lines or high-voltage cables

  • Mutual coupling up to 100 A

  • Positive/negativ or zero sequence impedance

Effektbrytere:

  • Contact resistance up to 400 ADC

  • Bushing: power/dissipation factor (tan δ) + insulation capacitance 12 kV, 300 mA

  • Circuit breaker: power/dissipation factor (tan δ) up to 12 kV, 300 mA | frequency from 15 Hz to 400 Hz