Electrical Testing Reference

Data record tests.current-circuit-injection.equipment.commissioning-mv.commissioning

Verified 2026-10-29 Confidence: High

Current Circuit Injection is specified for medium-voltage systems in commissioning testing at clause 7.2.A.34 of ANSI/NETA ECS-2024. The pre-energization clause calls for system primary injection (through-fault) testing in accordance with the owner's project requirements.

Value: medium-voltage systems

ProvenanceANSI/NETA ECS-2024 supports data record tests.current-circuit-injection.equipment.commissioning-mv.commissioning, which is cited on the entry Current Circuit Injection.SOURCEANSI/NETA ECS-2024ANSI/NETA ECS-2024Licensed standard, clause 7.2.A.34DATA RECORDtests.current-circuit-injection.equipment.commissioning-mv.commissioningtests.current-circuit-in..Verified 2026-10-29ENTRYCurrent Circuit InjectionCurrent Circuit InjectionNo 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 ECS-2024Licensed standard, clause 7.2.A.34
Data recordtests.current-circuit-injection.equipment.commissioning-mv.commissioningVerified 2026-10-29
EntryCurrent Circuit InjectionNo revisions
Subject
Current Circuit Injection (Test methods)
Kind
Equipment fact
Source
ANSI/NETA ECS-2024, clause 7.2.A.34, Standard for Electrical Commissioning Specifications, NETA. Publisher page for ANSI/NETA ECS-2024Publisher information page
Also stated in
  • FIST 3-8, section 8.1, page 21 (May 2011 (minor revisions 09/27/2021)).
    Read the reference passage

    8.1 Primary and Secondary Injection Test Techniques

    "One approach to test the total protection system is to use primary injection techniques (see appendix H) that trigger protective relays and lockout relay, trip circuit breakers, and initiate annunciations and indications. This technique also tests the CT or PT ratios, polarity, and phasing. Verify PT and CT secondary grounding in separate tests. If primary injection is not possible, use secondary injection techniques (see appendix H). These techniques locate wiring errors, insulation failures, loose connections, and other problems that go undetected if only relays are tested."

    FIST 3-8, section 8.1, page 21, May 2011 (minor revisions 09/27/2021). Agency copy of FIST 3-8

    The current standard governs; this passage is a public-domain description of the practice dated May 2011 (minor revisions 09/27/2021).

  • FIST 3-8, appendix H, page 107, Primary Injection (May 2011 (minor revisions 09/27/2021)).
    Read the reference passage

    Appendix H - Protection System Primary and Secondary Injection Test Methods

    "Primary injection testing is performed by injecting primary currents and/or voltages onto the primary windings of the current transformers (CTs) and potential transformers (PTs). A source(s) capable of supplying voltages and currents equal to normal and abnormal operation values must be available."

    FIST 3-8, appendix H, page 107, Primary Injection, May 2011 (minor revisions 09/27/2021). Agency copy of FIST 3-8

    The current standard governs; this passage is a public-domain description of the practice dated May 2011 (minor revisions 09/27/2021).

  • FIST 3-8, appendix H, page 108 (May 2011 (minor revisions 09/27/2021)).
    Read the reference passage

    Appendix H - Protection System Primary and Secondary Injection Test Methods

    "Primary injection testing is suited for the commissioning of new equipment, after a circuit modification, or periodic functional tests. Primary injection testing also will provide valuable information as to the saturation level of the instrument transformers."

    FIST 3-8, appendix H, page 108, May 2011 (minor revisions 09/27/2021). Agency copy of FIST 3-8

    The current standard governs; this passage is a public-domain description of the practice dated May 2011 (minor revisions 09/27/2021).

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.current-circuit-injection.equipment.commissioning-mv.commissioning." Electrical Testing Reference. 2026-10-29. https://www.electricaltestingreference.com/data/tests.current-circuit-injection.equipment.commissioning-mv.commissioning/.