This part of IEC 61557 specifies the general requirements for measuring and monitoringequipment for testing the electrical safety in low voltage distribution systems with nominalvoltages up to 1 000 V a.c. and 1 500 V...
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标准号:
BS EN 61557-1-2007
This part of IEC 61557 specifies the general requirements for measuring and monitoringequipment for testing the electrical safety in low voltage distribution systems with nominalvoltages up to 1 000 V a.c. and 1 500 V *** measuring equipment or measuring installations involve measurement tasks of variousmeasuring equipment covered by this series of standards, then the part of this series ofstandards relevant to each of the measurement tasks is applicable.
This part of IEC 61557 specifies the requirements applicable to equipment for measuring theresistance of earth conductors, protective earth conductors and conductors for equipotentialbonding, including their connectio...
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标准号:
BS EN 61557-4-2007
This part of IEC 61557 specifies the requirements applicable to equipment for measuring theresistance of earth conductors, protective earth conductors and conductors for equipotentialbonding, including their connections and terminals, with an indication of the measured value orindication of limits.
This part of IEC 61557 specifies the requirements for testing equipment applied to the testingof the effectiveness of residual current monitors (RCMs) of type A and type B, which arealready installed in distribution *...
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标准号:
BS EN 61557-11-2009
This part of IEC 61557 specifies the requirements for testing equipment applied to the testingof the effectiveness of residual current monitors (RCMs) of type A and type B, which arealready installed in distribution *** test equipment can be used in any kind of network like a TN, TT or IT system. The testequipment may also be used for testing directionally discriminating RCMs in IT-Systems.
This part of IEC 61557 specifies the requirements applicable to equipment for measuring theinsulation resistance of equipment and installations in the de-energized state.
标准号:
BS EN 61557-2-2007
This part of IEC 61557 specifies the requirements applicable to equipment for measuring theinsulation resistance of equipment and installations in the de-energized state.
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