JS EN 61557-7:2009
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence
This part of JS 61557 specifies the requirements for measuring equipment applied to testing the phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible.
General information
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Status
Published Document (JS)
Publication date
01/02/2010
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Effiective date
01/08/2010
Number of pages
12
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