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