Motor Testing Reference

IEEE 43-2013, insulation resistance testing of electric machinery

Updated 2026-10-13

This is revision 1 of the entry. It is the current revision. The current version is at /standards/ieee-43/.

IEEE 43-2013 is the IEEE recommended practice for testing the insulation resistance of electric machinery, published under the full title IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery. [1] [2] It describes direct-voltage procedures for measuring the insulation resistance and polarization index of stator and rotor windings and explains how the results are interpreted. [3] The IEEE catalog lists the 2013 edition as an inactive-reserved standard. [4]

Scope

The publisher's catalog describes the document as covering direct-voltage procedures for insulation resistance and polarization index measurements on stator and rotor windings, together with the interpretation of the results. [3] Within the text, the scope reaches the armature and field windings of synchronous machines, induction machines, direct-current machines and synchronous condensers, and leaves out fractional-horsepower machines. [Electrical Testing Reference] The stated purposes are to define the two tests, to name the factors that affect the readings, to recommend uniform test conditions and to give a basis for interpreting results. [Electrical Testing Reference]

Edition history

The 2013 edition is a revision of IEEE 43-2000. [5] It was approved on December 11, 2013 and published on March 6, 2014. [6] [2] The document was sponsored by the Electric Machinery Committee of the IEEE Power and Energy Society. [7]

Status

The IEEE catalog lists IEEE 43-2013 with the status Inactive-Reserved Standard and records March 21, 2024 as its inactivation date. [4]

Structure

Clause 4 of IEEE 43-2013 deals with safety, and clause 5 sets out the insulation resistance and polarization index test procedures, including the choice of test voltage. [8] [9] Clause 6 treats the factors that influence the readings, such as surface condition, moisture, temperature and test voltage. [10] Clause 7 covers the conditions recorded at the time of test, clause 8 the winding connections, and clause 9 the measuring instruments and methods. [11] [12] Clause 10 covers the application of the test voltage, including allowance for the drop across a protective resistor. [13]

Clause 11 addresses the interpretation of results, and clause 12 gives recommended minimum values for insulation resistance and polarization index. [14] [Electrical Testing Reference] [Electrical Testing Reference] An informative annex, Annex A, describes variants of the polarization index based on shorter reading times. [15] [Electrical Testing Reference]

Related tests

The recommended practice is the method reference for the insulation resistance test and for the polarization index of rotating machine windings. [Electrical Testing Reference] [Electrical Testing Reference] The dielectric absorption ratio used for rotating machinery in ANSI/NETA ATS-2025 corresponds to one of its informative variants. [Electrical Testing Reference] [Electrical Testing Reference]

Notes

  1. IEEE 43-2013. The publisher catalog gives the full title of IEEE 43-2013 as IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery. Value: IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery. Datum std.ieee-43.title
  2. IEEE 43-2013. IEEE 43-2013 is the 2013 edition of the IEEE document titled IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery, published on 2014-03-06. Value: 2013. Datum std.ieee-43.edition.2013
  3. IEEE 43-2013. The recommended practice describes direct-voltage procedures for measuring the insulation resistance and polarization index of stator and rotor windings and explains how to interpret the results. Datum std.ieee-43.scope
  4. IEEE 43-2013. The IEEE catalog lists IEEE 43-2013 with the status Inactive-Reserved Standard, with an inactivation date of 2024-03-21. Value: Inactive-Reserved Standard. Datum std.ieee-43.status
  5. IEEE 43-2013, clause Front matter. IEEE 43-2013 is a revision of IEEE 43-2000. Value: 2013. Datum std.ieee-43.revision-of
  6. IEEE 43-2013, clause Front matter. The 2013 edition of IEEE 43 was approved on 2013-12-11. Value: 2013. Datum std.ieee-43.approved
  7. IEEE 43-2013, clause Front matter. IEEE 43-2013 was sponsored by the Electric Machinery Committee of the IEEE Power and Energy Society. Datum std.ieee-43.sponsor
  8. IEEE 43-2013, clause 4. Clause 4 of IEEE 43-2013 deals with safety during insulation resistance testing. Datum std.ieee-43.structure.safety
  9. IEEE 43-2013, clause 5. Clause 5 of IEEE 43-2013 sets out the insulation resistance and polarization index test procedures and the choice of test voltage. Datum std.ieee-43.structure.procedure
  10. IEEE 43-2013, clause 6. Clause 6 of IEEE 43-2013 covers the factors that affect insulation resistance readings, among them surface condition, moisture, temperature and test voltage. Datum std.ieee-43.structure.factors
  11. IEEE 43-2013, clause 7, 8. Clause 7 of IEEE 43-2013 covers the conditions recorded at the time of test, and clause 8 covers the winding connections used for the test. Datum std.ieee-43.structure.conditions
  12. IEEE 43-2013, clause 9. Clause 9 of IEEE 43-2013 describes the instruments and methods for measuring insulation resistance. Datum std.ieee-43.structure.instruments
  13. IEEE 43-2013, clause 10. Clause 10 of IEEE 43-2013 covers how the test voltage is applied and held, including allowance for the drop across a protective resistor. Datum std.ieee-43.structure.voltage-application
  14. IEEE 43-2013, clause 11, 12. Clause 11 of IEEE 43-2013 covers the interpretation of test results, and clause 12 gives recommended minimum values. Datum std.ieee-43.structure.interpretation
  15. IEEE 43-2013, clause Annex A. Annex A of IEEE 43-2013 is informative and describes variants of the polarization index. Datum std.ieee-43.structure.annex-a

Data records

  • The 2013 edition of IEEE 43 was approved on 2013-12-11. Value: 2013. Source: IEEE 43-2013, clause Front matter. Verified 2026-10-13. Record std.ieee-43.approved
  • IEEE 43-2013 is the 2013 edition of the IEEE document titled IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery, published on 2014-03-06. Value: 2013. Source: IEEE 43-2013. Verified 2026-10-13. Record std.ieee-43.edition.2013
  • IEEE 43-2013 is a revision of IEEE 43-2000. Value: 2013. Source: IEEE 43-2013, clause Front matter. Verified 2026-10-13. Record std.ieee-43.revision-of
  • The recommended practice describes direct-voltage procedures for measuring the insulation resistance and polarization index of stator and rotor windings and explains how to interpret the results. Source: IEEE 43-2013. Verified 2026-10-13. Record std.ieee-43.scope
  • IEEE 43-2013 was sponsored by the Electric Machinery Committee of the IEEE Power and Energy Society. Source: IEEE 43-2013, clause Front matter. Verified 2026-10-13. Record std.ieee-43.sponsor
  • The IEEE catalog lists IEEE 43-2013 with the status Inactive-Reserved Standard, with an inactivation date of 2024-03-21. Value: Inactive-Reserved Standard. Source: IEEE 43-2013. Verified 2026-10-13. Record std.ieee-43.status
  • Annex A of IEEE 43-2013 is informative and describes variants of the polarization index. Source: IEEE 43-2013, clause Annex A. Verified 2026-10-13. Record std.ieee-43.structure.annex-a
  • Clause 7 of IEEE 43-2013 covers the conditions recorded at the time of test, and clause 8 covers the winding connections used for the test. Source: IEEE 43-2013, clause 7, 8. Verified 2026-10-13. Record std.ieee-43.structure.conditions
  • Clause 6 of IEEE 43-2013 covers the factors that affect insulation resistance readings, among them surface condition, moisture, temperature and test voltage. Source: IEEE 43-2013, clause 6. Verified 2026-10-13. Record std.ieee-43.structure.factors
  • Clause 9 of IEEE 43-2013 describes the instruments and methods for measuring insulation resistance. Source: IEEE 43-2013, clause 9. Verified 2026-10-13. Record std.ieee-43.structure.instruments
  • Clause 11 of IEEE 43-2013 covers the interpretation of test results, and clause 12 gives recommended minimum values. Source: IEEE 43-2013, clause 11, 12. Verified 2026-10-13. Record std.ieee-43.structure.interpretation
  • Clause 5 of IEEE 43-2013 sets out the insulation resistance and polarization index test procedures and the choice of test voltage. Source: IEEE 43-2013, clause 5. Verified 2026-10-13. Record std.ieee-43.structure.procedure
  • Clause 4 of IEEE 43-2013 deals with safety during insulation resistance testing. Source: IEEE 43-2013, clause 4. Verified 2026-10-13. Record std.ieee-43.structure.safety
  • Clause 10 of IEEE 43-2013 covers how the test voltage is applied and held, including allowance for the drop across a protective resistor. Source: IEEE 43-2013, clause 10. Verified 2026-10-13. Record std.ieee-43.structure.voltage-application
  • The publisher catalog gives the full title of IEEE 43-2013 as IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery. Value: IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery. Source: IEEE 43-2013. Verified 2026-10-13. Record std.ieee-43.title

Sources

  • IEEE 43-2013, IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery, 2013 edition, IEEE. Held as: Public page. Publisher page
  • IEEE 43-2013, Recommended Practice for Testing Insulation Resistance of Electric Machinery, 2013 edition, IEEE. Cited: clause Front matter; clause 4; clause 5; clause 6; clause 7, 8; clause 9; clause 10; clause 11, 12; clause Annex A. Held as: Purchased single-user copy. Publisher page

Obtaining the documents

Changelog (31 entries)
DateRevisionChange
2026-10-131created
2026-10-13created (std.ieee-43.approved)
2026-10-13reviewed (std.ieee-43.approved)
2026-10-13created (std.ieee-43.edition.2013)
2026-10-13reviewed (std.ieee-43.edition.2013)
2026-10-13created (std.ieee-43.revision-of)
2026-10-13reviewed (std.ieee-43.revision-of)
2026-10-13created (std.ieee-43.scope)
2026-10-13reviewed (std.ieee-43.scope)
2026-10-13created (std.ieee-43.sponsor)
2026-10-13reviewed (std.ieee-43.sponsor)
2026-10-13created (std.ieee-43.status)
2026-10-13reviewed (std.ieee-43.status)
2026-10-13created (std.ieee-43.structure.annex-a)
2026-10-13reviewed (std.ieee-43.structure.annex-a)
2026-10-13created (std.ieee-43.structure.conditions)
2026-10-13reviewed (std.ieee-43.structure.conditions)
2026-10-13created (std.ieee-43.structure.factors)
2026-10-13reviewed (std.ieee-43.structure.factors)
2026-10-13created (std.ieee-43.structure.instruments)
2026-10-13reviewed (std.ieee-43.structure.instruments)
2026-10-13created (std.ieee-43.structure.interpretation)
2026-10-13reviewed (std.ieee-43.structure.interpretation)
2026-10-13created (std.ieee-43.structure.procedure)
2026-10-13reviewed (std.ieee-43.structure.procedure)
2026-10-13created (std.ieee-43.structure.safety)
2026-10-13reviewed (std.ieee-43.structure.safety)
2026-10-13created (std.ieee-43.structure.voltage-application)
2026-10-13reviewed (std.ieee-43.structure.voltage-application)
2026-10-13created (std.ieee-43.title)
2026-10-13reviewed (std.ieee-43.title)

Cite this page

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

Permanent revision URL: https://www.motortestingreference.com/standards/ieee-43/rev/1/. Current version: https://www.motortestingreference.com/standards/ieee-43/.

"IEEE 43-2013, insulation resistance testing of electric machinery." Motor Testing Reference. Revision 1, 2026-10-13. https://www.motortestingreference.com/standards/ieee-43/rev/1/.