BS EN IEC 61558-1:2019

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