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DIN EN IEC 63522-21 VDE 0435-2027-21:2026-05

Electrical relays – Tests and measurements

Part 21: Thermal endurance

(IEC 63522-21:2025); German version EN IEC 63522-21:2025
Class/Status: Standard, valid
Released: 2026-05
VDE Art. No.: 0400764

Note: You can pre-order this document (delivery subject to availability). Valid from 2026-05-01.

This part of IEC 63522 is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of specimens to perform under expected conditions of transportation, storage and all aspects of operational use.
The object of this test is to define a standard test method for resistance:
– to high temperature for long periods.

This Document is related to the following Topics (in bold):

29	ELECTRICAL ENGINEERING
29.020	Electrical engineering in general
29.030	Magnetic materials
29.035	Insulating materials
29.040	Insulating fluids
29.050	Superconductivity and conducting materials
29.060	Electrical wires and cables
29.080	Insulation
29.100	Components for electrical equipment
29.120	Electrical accessories
29.130	Switchgear and controlgear
29.140	Lamps and related equipment
29.160	Rotating machinery
29.180	Transformers. Reactors
29.200	Rectifiers. Converters. Stabilized power supply
29.220	Galvanic cells and batteries
29.240	Power transmission and distribution networks
29.260	Electrical equipment for working in special conditions
29.280	Electric traction equipment

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DIN EN IEC 63522-21 VDE 0435-2027-21:2026-05

Electrical relays – Tests and measurements

Part 21: Thermal endurance

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