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Standard
Designated

BS EN IEC 61558-1:2019

Safety of transformers, reactors, power supply units and combinations thereof - General requirements and tests

Current

•

Published:

31 Jan 2026

Overview
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Product Details
Descriptors
Tracking tests
Alternating-current transformers
Small-power transformers
Polyphase transformers
Dielectric-strength tests
Protected electrical equipment
Impact testing
Electric enclosures
Power output
Electrical safety
Power transformers
Electrical testing
Safety measures
Overload protection
Temperature-rise limit
Portable
Single-phase transformers
Flexible conductors
Resistance measurement
Clearance distances
Cut-out devices
Switches
Drop tests
Electrical insulation
Torque
Fire tests
Isolating transformers
Type testing
Screws (bolts)
Circuits
Earthing
Mechanical testing
Rated voltage
Windings
Marking
Rated frequencies
Dry-type transformers
Electric terminals
Dielectric strength
Transformers
Electrical equipment
Symbols
Thermal testing
Leakage paths
Electrical protection equipment
Cable glands
Electric power systems
Short-circuit current tests
Classification systems
Corrosion tests
Environmental testing
Safety isolating transformers
Stationary
ICS Codes
29.180 Transformers. Reactors
Committee
PEL/96
International relationships
Identical to:

EN IEC 61558-1:2019/AC:2026-01

IEC 61558-1/COR1

ISBN
978 0 539 40282 7
Publisher
BSI