Circuit Breaker Reference

Data record tests.dielectric-withstand.equipment.breaker-vacuum.maintenance

Verified 2026-10-29 Confidence: High

Dielectric Withstand is specified for medium-voltage vacuum circuit breakers in maintenance testing at clause 7.6.3.B.9 of ANSI/NETA MTS-2023. The clause calls for a dielectric withstand voltage test in accordance with the manufacturer's published data.

Value: medium-voltage vacuum circuit breakers

ProvenanceANSI/NETA MTS-2023 supports data record tests.dielectric-withstand.equipment.breaker-vacuum.maintenance, which is cited on the entry Dielectric Withstand.SOURCEANSI/NETA MTS-2023ANSI/NETA MTS-2023Licensed standard, clause 7.6.3.B.9DATA RECORDtests.dielectric-withstand.equipment.breaker-vacuum.maintenancetests.dielectric-withsta..Verified 2026-10-29ENTRYDielectric WithstandDielectric WithstandNo 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 MTS-2023Licensed standard, clause 7.6.3.B.9
Data recordtests.dielectric-withstand.equipment.breaker-vacuum.maintenanceVerified 2026-10-29
EntryDielectric WithstandNo revisions
Subject
Dielectric Withstand (Test methods)
Kind
Equipment fact
Source
ANSI/NETA MTS-2023, clause 7.6.3.B.9, Maintenance Testing Specifications for Electrical Power Equipment and Systems, NETA. Publisher page for ANSI/NETA MTS-2023Publisher information page
Also stated in
  • FIST 3-16, section 6.3.2.1, page 47 (May 2024).
    Read the reference passage

    6.3.2.1 AC or DC Hi-Pot Test

    "The hi-pot test is the best way to check the insulation and perform a vacuum-integrity test within one set of tests. It is also the quickest and easiest to perform. The hi-pot test is strictly a pass/fail test. An AC hi-pot is preferred due to possible x-ray emissions which can be produced by some DC hi-pot test sets when testing is performed at voltages higher than rated voltage with the contacts open."

    FIST 3-16, section 6.3.2.1, page 47, May 2024. Agency copy of FIST 3-16

    The current standard governs; this passage is a public-domain description of the practice dated May 2024.

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.dielectric-withstand.equipment.breaker-vacuum.maintenance." Circuit Breaker Reference. 2026-10-29. https://www.circuitbreakerreference.com/data/tests.dielectric-withstand.equipment.breaker-vacuum.maintenance/.