Changes

Last reviewed 2026-10-26

About this log

This page lists changes to the site in date order: pages published, substantive revisions, corrections, and datums superseded by new versions. Each entry links to the affected page or datum and, for a revised page, to the revision it produced.

Typographical fixes that change no fact are recorded only in the change log of the page concerned. Corrections made in response to reports are also listed in the corrections log.

Change log

Recorded changes per month. Every change to a data record or an article, counted by the month it was recorded.

Recorded changes per month: recorded changes per month.
Month	Changes
Oct 2026	249

The 200 most recent of 249 recorded changes, newest first.
Date	Type	Entry	Change
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.tolerance-deferred	created
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.tolerance-deferred	review_status unreviewed -> software_reviewed
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.methods	created
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.methods	review_status unreviewed -> software_reviewed
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.definition	created
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.definition	review_status unreviewed -> software_reviewed
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.conditions	created
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.conditions	revised
2026-10-24	datum	tests.transformer-turns-ratio.ieeec57-12-90.conditions	review_status unreviewed -> software_reviewed
2026-10-24	datum	tests.transformer-excitation-current.ieeec57-12-90.factory-basis	created
2026-10-24	datum	tests.transformer-excitation-current.ieeec57-12-90.factory-basis	review_status unreviewed -> software_reviewed
2026-10-24	datum	tests.transformer-excitation-current.ieeec57-12-90.basis	created
2026-10-24	datum	tests.transformer-excitation-current.ieeec57-12-90.basis	revised
2026-10-24	datum	tests.transformer-excitation-current.ieeec57-12-90.basis	review_status unreviewed -> software_reviewed
2026-10-24	datum	tests.leakage-reactance.ieeec57-12-90.reactive-component	created
2026-10-24	datum	tests.leakage-reactance.ieeec57-12-90.reactive-component	review_status unreviewed -> software_reviewed
2026-10-24	datum	tests.leakage-reactance.ieeec57-12-90.impedance-voltage-definition	created
2026-10-24	datum	tests.leakage-reactance.ieeec57-12-90.impedance-voltage-definition	revised
2026-10-24	datum	tests.leakage-reactance.ieeec57-12-90.impedance-voltage-definition	review_status unreviewed -> software_reviewed
2026-10-24	datum	tests.leakage-reactance.ieeec57-12-90.factors	created
2026-10-24	datum	tests.leakage-reactance.ieeec57-12-90.factors	revised
2026-10-24	datum	tests.leakage-reactance.ieeec57-12-90.factors	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.title	created
2026-10-24	datum	std.ieee-c57-12-90.title	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.test-types	created
2026-10-24	datum	std.ieee-c57-12-90.test-types	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.test-order	created
2026-10-24	datum	std.ieee-c57-12-90.test-order	revised
2026-10-24	datum	std.ieee-c57-12-90.test-order	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.temperature-rise-and-sound	created
2026-10-24	datum	std.ieee-c57-12-90.structure.temperature-rise-and-sound	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.short-circuit	created
2026-10-24	datum	std.ieee-c57-12-90.structure.short-circuit	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.resistance	created
2026-10-24	datum	std.ieee-c57-12-90.structure.resistance	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.ratio	created
2026-10-24	datum	std.ieee-c57-12-90.structure.ratio	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.polarity	created
2026-10-24	datum	std.ieee-c57-12-90.structure.polarity	revised
2026-10-24	datum	std.ieee-c57-12-90.structure.polarity	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.no-load-loss	created
2026-10-24	datum	std.ieee-c57-12-90.structure.no-load-loss	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.load-loss	created
2026-10-24	datum	std.ieee-c57-12-90.structure.load-loss	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.dielectric	created
2026-10-24	datum	std.ieee-c57-12-90.structure.dielectric	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.calculated-data	created
2026-10-24	datum	std.ieee-c57-12-90.structure.calculated-data	revised
2026-10-24	datum	std.ieee-c57-12-90.structure.calculated-data	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.structure.annex-b	created
2026-10-24	datum	std.ieee-c57-12-90.structure.annex-b	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.sponsor	created
2026-10-24	datum	std.ieee-c57-12-90.sponsor	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.scope	created
2026-10-24	datum	std.ieee-c57-12-90.scope	revised
2026-10-24	datum	std.ieee-c57-12-90.scope	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.revision-of	created
2026-10-24	datum	std.ieee-c57-12-90.revision-of	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.relationship.c57-12-00	created
2026-10-24	datum	std.ieee-c57-12-90.relationship.c57-12-00	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.dielectric-order	created
2026-10-24	datum	std.ieee-c57-12-90.dielectric-order	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.designation	created
2026-10-24	datum	std.ieee-c57-12-90.designation	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.definition.liquid	created
2026-10-24	datum	std.ieee-c57-12-90.definition.liquid	review_status unreviewed -> software_reviewed
2026-10-24	datum	std.ieee-c57-12-90.approved	created
2026-10-24	datum	std.ieee-c57-12-90.approved	revised
2026-10-24	datum	std.ieee-c57-12-90.approved	review_status unreviewed -> software_reviewed
2026-10-24	datum	equip.liquid-filled-transformers.ieeec57-12-90.test-code	created
2026-10-24	datum	equip.liquid-filled-transformers.ieeec57-12-90.test-code	revised
2026-10-24	datum	equip.liquid-filled-transformers.ieeec57-12-90.test-code	review_status unreviewed -> software_reviewed
2026-10-13	datum	tests.winding-resistance.equipment.transformer.maintenance	created
2026-10-13	datum	tests.winding-resistance.equipment.transformer.acceptance	created
2026-10-13	datum	tests.winding-resistance.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.winding-resistance.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.winding-resistance.equipment.regulator.maintenance	created
2026-10-13	datum	tests.winding-resistance.equipment.regulator.acceptance	created
2026-10-13	datum	tests.visual-and-mechanical-inspection.equipment.transformer.maintenance	created
2026-10-13	datum	tests.visual-and-mechanical-inspection.equipment.transformer.acceptance	created
2026-10-13	datum	tests.visual-and-mechanical-inspection.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.visual-and-mechanical-inspection.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.visual-and-mechanical-inspection.equipment.regulator.maintenance	created
2026-10-13	datum	tests.visual-and-mechanical-inspection.equipment.regulator.acceptance	created
2026-10-13	datum	tests.vacuum-interrupter-mac-test.equipment.regulator.maintenance	created
2026-10-13	datum	tests.vacuum-interrupter-mac-test.equipment.regulator.acceptance	created
2026-10-13	datum	tests.vacuum-interrupter-integrity.equipment.regulator.maintenance	created
2026-10-13	datum	tests.vacuum-interrupter-integrity.equipment.regulator.acceptance	created
2026-10-13	datum	tests.transformer-turns-ratio.title	created
2026-10-13	datum	tests.transformer-turns-ratio.governed-by.ieee-c57-18-10	created
2026-10-13	datum	tests.transformer-turns-ratio.governed-by.ieee-c57-12-01	created
2026-10-13	datum	tests.transformer-turns-ratio.governed-by.ieee-c57-12-00	created
2026-10-13	datum	tests.transformer-turns-ratio.governed-by.ansi-neta-mts	created
2026-10-13	datum	tests.transformer-turns-ratio.governed-by.ansi-neta-ats	created
2026-10-13	datum	tests.transformer-turns-ratio.equipment.transformer.maintenance	created
2026-10-13	datum	tests.transformer-turns-ratio.equipment.transformer.acceptance	created
2026-10-13	datum	tests.transformer-turns-ratio.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.transformer-turns-ratio.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.transformer-turns-ratio.equipment.regulator.maintenance	created
2026-10-13	datum	tests.transformer-turns-ratio.equipment.regulator.acceptance	created
2026-10-13	datum	tests.transformer-turns-ratio.equipment.instrument.maintenance	created
2026-10-13	datum	tests.transformer-turns-ratio.equipment.instrument.acceptance	created
2026-10-13	datum	tests.transformer-excitation-current.title	created
2026-10-13	datum	tests.transformer-excitation-current.governed-by.ansi-neta-mts	created
2026-10-13	datum	tests.transformer-excitation-current.governed-by.ansi-neta-ats	created
2026-10-13	datum	tests.transformer-excitation-current.equipment.transformer.maintenance	created
2026-10-13	datum	tests.transformer-excitation-current.equipment.transformer.acceptance	created
2026-10-13	datum	tests.transformer-excitation-current.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.transformer-excitation-current.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.transformer-excitation-current.equipment.regulator.maintenance	created
2026-10-13	datum	tests.transformer-excitation-current.equipment.regulator.acceptance	created
2026-10-13	datum	tests.transformer-core-insulation-resistance.title	created
2026-10-13	datum	tests.transformer-core-insulation-resistance.governed-by.ansi-neta-mts	created
2026-10-13	datum	tests.transformer-core-insulation-resistance.governed-by.ansi-neta-ats	created
2026-10-13	datum	tests.transformer-core-insulation-resistance.equipment.transformer.maintenance	created
2026-10-13	datum	tests.transformer-core-insulation-resistance.equipment.transformer.acceptance	created
2026-10-13	datum	tests.transformer-core-insulation-resistance.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.transformer-core-insulation-resistance.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.sweep-frequency-response-analysis.title	created
2026-10-13	datum	tests.sweep-frequency-response-analysis.governed-by.ansi-neta-mts	created
2026-10-13	datum	tests.sweep-frequency-response-analysis.governed-by.ansi-neta-ats	created
2026-10-13	datum	tests.sweep-frequency-response-analysis.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.sweep-frequency-response-analysis.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.surge-arrester-and-spd-tests.equipment.transformer.maintenance	created
2026-10-13	datum	tests.surge-arrester-and-spd-tests.equipment.transformer.acceptance	created
2026-10-13	datum	tests.surge-arrester-and-spd-tests.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.surge-arrester-and-spd-tests.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.resistor-and-coil-resistance.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.resistor-and-coil-resistance.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.power-factor-tip-up.equipment.transformer.maintenance	created
2026-10-13	datum	tests.power-factor-tip-up.equipment.transformer.acceptance	created
2026-10-13	datum	tests.polarization-index-and-dielectric-absorption.equipment.regulator.maintenance	created
2026-10-13	datum	tests.partial-discharge-online.equipment.transformer.maintenance	created
2026-10-13	datum	tests.partial-discharge-online.equipment.transformer.acceptance	created
2026-10-13	datum	tests.leakage-reactance.title	created
2026-10-13	datum	tests.leakage-reactance.governed-by.ieee-c57-15	created
2026-10-13	datum	tests.leakage-reactance.governed-by.ansi-neta-mts	created
2026-10-13	datum	tests.leakage-reactance.governed-by.ansi-neta-ats	created
2026-10-13	datum	tests.leakage-reactance.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.leakage-reactance.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.leakage-reactance.equipment.regulator.acceptance	created
2026-10-13	datum	tests.insulation-resistance.equipment.transformer.maintenance	created
2026-10-13	datum	tests.insulation-resistance.equipment.transformer.acceptance	created
2026-10-13	datum	tests.insulation-resistance.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.insulation-resistance.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.insulation-resistance.equipment.regulator.maintenance	created
2026-10-13	datum	tests.insulation-resistance.equipment.regulator.acceptance	created
2026-10-13	datum	tests.insulation-power-factor-dissipation-factor.equipment.transformer.maintenance	created
2026-10-13	datum	tests.insulation-power-factor-dissipation-factor.equipment.transformer.acceptance	created
2026-10-13	datum	tests.insulation-power-factor-dissipation-factor.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.insulation-power-factor-dissipation-factor.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.insulation-power-factor-dissipation-factor.equipment.regulator.maintenance	created
2026-10-13	datum	tests.insulation-power-factor-dissipation-factor.equipment.regulator.acceptance	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.title	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.governed-by.ansi-neta-mts	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.governed-by.ansi-neta-ats	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.equipment.regulator.maintenance	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.equipment.regulator.acceptance	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.equipment.reactor.maintenance	created
2026-10-13	datum	tests.gas-blanket-oxygen-content.equipment.reactor.acceptance	created
2026-10-13	datum	tests.dynamic-winding-resistance.title	created
2026-10-13	datum	tests.dynamic-winding-resistance.governed-by.ansi-neta-mts	created
2026-10-13	datum	tests.dynamic-winding-resistance.governed-by.ansi-neta-ats	created
2026-10-13	datum	tests.dynamic-winding-resistance.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.dynamic-winding-resistance.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.dynamic-winding-resistance.equipment.regulator.maintenance	created
2026-10-13	datum	tests.dynamic-winding-resistance.equipment.regulator.acceptance	created
2026-10-13	datum	tests.dielectric-withstand.equipment.transformer.maintenance	created
2026-10-13	datum	tests.dielectric-withstand.equipment.transformer.acceptance	created
2026-10-13	datum	tests.dielectric-frequency-response.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.dielectric-frequency-response.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.control-and-functional-verification.equipment.transformer.maintenance	created
2026-10-13	datum	tests.control-and-functional-verification.equipment.transformer.acceptance	created
2026-10-13	datum	tests.control-and-functional-verification.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.control-and-functional-verification.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.control-and-functional-verification.equipment.regulator.maintenance	created
2026-10-13	datum	tests.control-and-functional-verification.equipment.regulator.acceptance	created
2026-10-13	datum	tests.bushing-power-factor-and-capacitance.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.bushing-power-factor-and-capacitance.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.bushing-power-factor-and-capacitance.equipment.regulator.maintenance	created
2026-10-13	datum	tests.bushing-power-factor-and-capacitance.equipment.regulator.acceptance	created
2026-10-13	datum	tests.bolted-connection-resistance.equipment.transformer.maintenance	created
2026-10-13	datum	tests.bolted-connection-resistance.equipment.transformer.acceptance	created
2026-10-13	datum	tests.bolted-connection-resistance.equipment.transformer-fluid.maintenance	created
2026-10-13	datum	tests.bolted-connection-resistance.equipment.transformer-fluid.acceptance	created
2026-10-13	datum	tests.bolted-connection-resistance.equipment.regulator.maintenance	created
2026-10-13	datum	tests.bolted-connection-resistance.equipment.regulator.acceptance	created
2026-10-13	datum	std.ieee-c57-18-10.title	created
2026-10-13	datum	std.ieee-c57-18-10.title	reviewed
2026-10-13	datum	std.ieee-c57-18-10.status	created
2026-10-13	datum	std.ieee-c57-18-10.status	reviewed
2026-10-13	datum	std.ieee-c57-18-10.scope	created
2026-10-13	datum	std.ieee-c57-18-10.scope	reviewed
2026-10-13	datum	std.ieee-c57-18-10.scope	edited
2026-10-13	datum	std.ieee-c57-18-10.edition.2021	created
2026-10-13	datum	std.ieee-c57-18-10.edition.2021	reviewed
2026-10-13	datum	std.ieee-c57-18-10.designation	created
2026-10-13	datum	std.ieee-c57-15.title	created