IEC 61557-7:1997

 
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IEC 61557-7:1997

Title
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence
Abstract
Specifies requirements for measuring equipment applied to testing th e phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible.
Issue date
1997-02-28
Category
MEAS
Included in IECEE System
2007-10-01
Test Report Form
Testing Equipment List