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This part of IEC 61000 is concerned with conducted disturbances in the frequency range from 0 kHz to 9 kHz, with an extension up to 148,5 kHz specifically for mains signalling systems. Compatibility levels are specified for electromagnetic disturbances of the types which can be expected in public medium voltage power supply systems, for guidance in: a) the limits to be set for disturbance…

This National Standard of Canada is based on International Standard CEI/IEC 61558-1:1997 (edition 1.1, 1998-07). 1 Scope 1.1 This International Standard deals with all aspects of safety (such as electrical, thermal and mechanical) of: a) Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) isolating and safety isolating transformers, associated or otherwise, having…

This National Standard of Canada is equivalent to International Standard CEI/IEC 61558-2-1:1997 (first edition 1997-02). 1 Scope Replacement: This part 2 of IEC 61558 applies to stationary or portable, single-phase or polyphase, aircooled separating transformers, associated or not, having a rated supply voltage not exceeding 1000 V a.c., a rated frequency not exceeding 500 Hz, and a…

This National Standard of Canada is equivalent to International Standard CEI/IEC 61558-2-4:1997 (first edition, 1997-02). 1 Scope Replacement: This part 2 of IEC 61558 applies to stationary or portable, single-phase or polyphase, air-cooled isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V a.c. and rated frequency not exceeding 500 Hz,…

This part of International Standard IEC 60044 applies to new single-phase capacitor voltage transformers connected between line and ground for system voltages Um ³ 72,5 kV at power frequencies from 15 Hz to 100 Hz. They are intended to supply a low voltage for measurement, control and protective functions. This publication has the status of a PAS. A PAS is a technical specification not…

This National Standard of Canada is based on International Standard CEI/IEC 71-1:1993 1 Scope This part of International Standard IEC 71 applies to three-phase a.c. systems having a highest voltage for equipment above 1 kV. It specifies the procedure for the selection of the standard withstand voltages for the phase-to-earth, phase-to-phase and longitudinal insulation of the equipment…