BS EN IEC 62271-107:2019

This part of IEC 62271 applies to three-pole-operated fused circuit-switchers designed with rated voltages above 1 kV up to and including 52 kV for use on three-phase alternating current systems of either 50 Hz or 60 Hz.

They can be designed either as stand-alone devices, or be embedded in a switchgear and controlgear assembly.

They are intended to be used for circuits or applications requiring only a normal mechanical and electrical endurance capability. Such applications cover protection of HV/LV transformers for instance, but exclude distribution lines or cables, as well as motor circuits and capacitor bank circuits.

Short-circuit conditions with low currents, up to the fused circuit-switcher rated take-over current, are dealt with by supplementary devices (strikers, relays, etc.), properly arranged, tripping the circuit-switcher. Current-limiting fuses are incorporated in order to ensure that the short-circuit breaking capacity of the device is above that of the circuit-switcher alone.

Cross References:
EN 60282-1:2009
IEC 62271-1:2017
IEC 62271-105:2012
EN 62271-103:2011
EN 62271-105:2012
EN 62271-100:2009/A1:2012
IEC 62271-100:2008/AMD2:2017
IEC 60282-1:2009/AMD1:2014
EN 62271-1:2017
IEC 60282-1:2009
EN 62271-100:2009/A2:2017
EN 60282-1:2009/A1:2014
IEC 62271-100:2008/AMD1:2012
IEC 62271-103:2011
EN 62271-100:2009
IEC 62271-100:2008
IEC 62271-201
IEC/TR 62655
EN IEC 62271-102
IEC 62271-200
IEC 60050
EN 62271-201
EN 62271-200
IEC 62271-102
IEEE C37.016


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