Switchgear Testing Reference

Data record tests.visual-and-mechanical-inspection.equipment.switch-open-hv.maintenance

Verified 2026-11-02 Confidence: High

Visual and Mechanical Inspection is specified for open medium-voltage and high-voltage air switches in maintenance testing at clause 7.5.1.3.A of ANSI/NETA MTS-2023. The clause covers the physical and mechanical condition, anchorage, alignment, grounding and clearances, cleaning of the insulators, blade alignment, blade penetration, travel stops, arc interrupter operation and mechanical operation, the fuse sizes and types and the fuseholders, bolted connections, the interlocking systems, the mechanical operator tests, the operation and adjustment of motor operator limit switches and mechanical interlocks, lubrication and the operation counter, with as-found and as-left tests around the cleaning.

Value: open medium-voltage and high-voltage air switches

ProvenanceANSI/NETA MTS-2023 supports data record tests.visual-and-mechanical-inspection.equipment.switch-open-hv.maintenance, which is cited on the entry Visual and Mechanical Inspection.SOURCEANSI/NETA MTS-2023ANSI/NETA MTS-2023Licensed standard, clause 7.5.1.3.ADATA RECORDtests.visual-and-mechanical-inspection.equipment.switch-open-hv.maintenancetests.visual-and-mechani..Verified 2026-11-02ENTRYVisual and Mechanical InspectionVisual and Mechanical In..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 MTS-2023Licensed standard, clause 7.5.1.3.A
Data recordtests.visual-and-mechanical-inspection.equipment.switch-open-hv.maintenanceVerified 2026-11-02
EntryVisual and Mechanical InspectionNo revisions
Subject
Visual and Mechanical Inspection (Test methods)
Kind
Equipment fact
Source
ANSI/NETA MTS-2023, clause 7.5.1.3.A, 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 NAVFAC MO-201, section 3.4.5.1, PDF page 79, printed 3-27, item (f) (April 1990).
    Read the reference passage

    3.4.5.1 Operation Rules

    "Power-operated switches should be operated periodically to assure that the switches, their mechanism, and control features are functioning properly. Where the circuit conditions will not permit operating the switch energized, and the circuit cannot be deenergized for this purpose, it is suggested that arrangements be made to disengage the operating mechanism to be checked (provided that this method does not adversely affect the overall adjustment)."

    NAVFAC MO-201, section 3.4.5.1, PDF page 79, printed 3-27, item (f), April 1990. Agency copy of NAVFAC MO-201

    The current standard governs; this passage is a public-domain description of the practice dated April 1990.

  • Stated independently by NAVFAC MO-201, section 3.8.3.3, PDF page 111, printed 3-59, items (a) and (b); the document's "biannually" is kept as printed and its meaning (twice a year or every two years) is an open question (April 1990).
    Read the reference passage

    3.8.3.3 Switches

    "There are several different types of switches on line and on the substation busses. The primary function of a switch is to open or close a feeder. (a) Check for loose connections and proper operation biannually. (b) Check contact surfaces biannually."

    NAVFAC MO-201, section 3.8.3.3, PDF page 111, printed 3-59, items (a) and (b); the document's "biannually" is kept as printed and its meaning (twice a year or every two years) is an open question, April 1990. Agency copy of NAVFAC MO-201

    The current standard governs; this passage is a public-domain description of the practice dated April 1990.

History

Every recorded change to this data record, oldest first.
DateChange
2026-11-02created

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

"Data record tests.visual-and-mechanical-inspection.equipment.switch-open-hv.maintenance." Switchgear Testing Reference. 2026-11-02. https://www.switchgeartestingreference.com/data/tests.visual-and-mechanical-inspection.equipment.switch-open-hv.maintenance/.