Circuit Breaker Reference

Data record tests.bushing-power-factor-and-capacitance.equipment.breaker-oil.acceptance

Verified 2026-10-29 Confidence: High

Bushing Power Factor and Capacitance is specified for medium-voltage and high-voltage oil circuit breakers in acceptance testing at clause 7.6.2.B.11 of ANSI/NETA ATS-2025. The clause calls for power-factor or dissipation-factor tests on each bushing that has a power-factor or capacitance tap, and a hot-collar test where there is none.

Value: medium-voltage and high-voltage oil circuit breakers

ProvenanceANSI/NETA ATS-2025 supports data record tests.bushing-power-factor-and-capacitance.equipment.breaker-oil.acceptance, which is cited on the entry Bushing Power Factor and Capacitance.SOURCEANSI/NETA ATS-2025ANSI/NETA ATS-2025Licensed standard, clause 7.6.2.B.11DATA RECORDtests.bushing-power-factor-and-capacitance.equipment.breaker-oil.acceptancetests.bushing-power-fact..Verified 2026-10-29ENTRYBushing Power Factor and CapacitanceBushing Power Factor and..No revisions
Provenance. Where this record comes from and where it is used: the cited source, the record itself and the entry that cites it.
Provenance: the chain from source to entry.
StepItemDetail
SourceANSI/NETA ATS-2025Licensed standard, clause 7.6.2.B.11
Data recordtests.bushing-power-factor-and-capacitance.equipment.breaker-oil.acceptanceVerified 2026-10-29
EntryBushing Power Factor and CapacitanceNo revisions
Subject
Bushing Power Factor and Capacitance (Test methods)
Kind
Equipment fact
Source
ANSI/NETA ATS-2025, clause 7.6.2.B.11, Acceptance Testing Specifications for Electrical Power Equipment and Systems, NETA. Publisher page for ANSI/NETA ATS-2025Publisher information page
Also stated in
  • FIST 4-7, section 6.1.10.2, page 46 (August 2023).
    Read the reference passage

    6.1.10.2 Insulation Test

    "Power factor tests should be performed on each phase with the breaker in both the open and the closed position. Power factor tests should be performed on each bushing of oil-filled breakers. Use conductive straps and the hot collar procedure if bushings are not equipped with a power factor tap. The power factor of an insulation should remain constant with increasing test voltage if no discharges are present."

    FIST 4-7, section 6.1.10.2, page 46, August 2023. Agency copy of FIST 4-7

    The current standard governs; this passage is a public-domain description of the practice dated August 2023.

History

Every recorded change to this data record, oldest first.
DateChange
2026-10-29created

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Cite the governing standard for the fact itself; cite this page as the finding aid.

"Data record tests.bushing-power-factor-and-capacitance.equipment.breaker-oil.acceptance." Circuit Breaker Reference. 2026-10-29. https://www.circuitbreakerreference.com/data/tests.bushing-power-factor-and-capacitance.equipment.breaker-oil.acceptance/.