Testing CT & VT
NEKA performs testing of current transformers (CTs) and voltage transformers (VTs) as part of commissioning, acceptance testing, and condition assessment programs. The testing consists of a range of standardized procedures designed to verify performance, accuracy, and compliance with applicable standards, including IEC 61869 and NEK 440. These tests provide objective verification of equipment condition and ensure safe and reliable operation throughout the asset lifecycle.
Skillebryter og effektbryter
> Contact resistance up to 400 ADC
> Bushing: power/dissipation factor (tan δ) + insulation capacitance 15kV
> Circuit breaker: Power/dissipation factor /tan δ
CT testing
Current transformer testing
> CT ratio (with burden)
> CT burden up to 6 AAC | secondary
> CT excitation curve
> CT ratio
> CT winding resistance
> CT demagnetisation
> CT voltage withstand test
>Power/dissipation factor test up to 15 kV
VT testing
> VT ratio
> VT burden secondary
> VT secondary voltage withstand test
> VT voltage withstand test
> IEC 61850 Sampled Values testing
> Power/dissipation factor test up to 15kV
Måling av partielle utladninger på gjennomføringer
PD målinger utføres under normale driftsforhold. Litt avhengig av tilkomsten utføres målingene uten behov for driftsstans eller ved en rask utkobling for tilkobling av sensorer. Ved oppdagelse av PD aktivitet kan utstyret monters for overvåking over tid