Circuit Breaker Reference

Data record tests.contact-resistance.equipment.breaker-vacuum.maintenance

Verified 2026-10-29 Confidence: High

Contact Resistance is specified for medium-voltage vacuum circuit breakers in maintenance testing at clause 7.6.3.B.4 of ANSI/NETA MTS-2023. The clause calls for a static contact or pole resistance test on the breaker.

Value: medium-voltage vacuum circuit breakers

ProvenanceANSI/NETA MTS-2023 supports data record tests.contact-resistance.equipment.breaker-vacuum.maintenance, which is cited on the entry Contact Resistance.SOURCEANSI/NETA MTS-2023ANSI/NETA MTS-2023Licensed standard, clause 7.6.3.B.4DATA RECORDtests.contact-resistance.equipment.breaker-vacuum.maintenancetests.contact-resistance..Verified 2026-10-29ENTRYContact ResistanceContact ResistanceNo 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.4
Data recordtests.contact-resistance.equipment.breaker-vacuum.maintenanceVerified 2026-10-29
EntryContact ResistanceNo revisions
Subject
Contact Resistance (Test methods)
Kind
Equipment fact
Source
ANSI/NETA MTS-2023, clause 7.6.3.B.4, Maintenance Testing Specifications for Electrical Power Equipment and Systems, NETA. Publisher page for ANSI/NETA MTS-2023Publisher information page
Also stated in
  • Stated independently by FIST 3-16, section 2.4, page 10 (May 2024).
    Read the reference passage

    2.4 Contact Resistance Test

    "When performing a contact resistance test, a minimum of 100 Amps shall be used."

    FIST 3-16, section 2.4, page 10, 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.

  • Stated independently by FIST 3-16, section 2.4, page 10 (May 2024).
    Read the reference passage

    2.4 Contact Resistance Test

    "Contact resistance shall not exceed that which was set by the manufacturer's O&M manual. If the manufacturer's O&M manual is not available, the contact resistance shall not exceed 200% of the manufacturer's factory test data. [...] If any readings fail these conditions, further investigation shall be required to determine the root cause."

    FIST 3-16, section 2.4, page 10, 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

Cite this page

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

"Data record tests.contact-resistance.equipment.breaker-vacuum.maintenance." Circuit Breaker Reference. 2026-10-29. https://www.circuitbreakerreference.com/data/tests.contact-resistance.equipment.breaker-vacuum.maintenance/.