IEC/EN 60076-10 — Determination of sound levels
Measurement of transformer sound levels. Environmental noise specifications for urban substations.
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Products — switchgear & transformers
IEC/IEEE 62271, 60076, 61439, 60947, C37, C57, DER/BESS product and listing standards.
IEEE C57.12.00 / C57.12.90 — liquid-immersed transformers requirements & tests
North American liquid-immersed transformer general requirements and test code pair.
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IEEE C57.12.01 / C57.12.91 — dry-type transformers requirements & tests
North American dry-type transformer requirements and test code pair.
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IEC/EN 61869-1 — Instrument transformers — General requirements
General requirements for instrument transformers. Modern CT/VT product family base standard.
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IEC/EN 61869-2 — Current transformers
Product standard for current transformers. Accuracy classes, ratings, tests.
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IEC/EN 61869-3 — Inductive voltage transformers
Inductive voltage transformers product standard for protection and metering.
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IEC/EN 61869-4 — Combined transformers
Combined instrument transformers. Compact outdoor metering/protection units.
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IEC/EN 61869-5 — Capacitive voltage transformers
Capacitive voltage transformers for HV systems. Common on transmission circuits.
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IEEE C57.13 — Instrument transformers (US)
North American instrument transformer standard still widely referenced alongside IEC 61869.
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IEC/EN 60947-1 — LV switchgear and controlgear — General rules
General rules for LV switchgear and controlgear. Base of MCCB/ACB/contactor product standards.
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