SN EN 61557-7 : 1997
Current
The latest, up-to-date edition.
ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMS UP TO 1 KV A.C. AND 1,5 KV D.C. - EQUIPMENT FOR TESTING, MEASURING OR MONITORING OF PROTECTIVE MEASURES - PART 7: PHASE SEQUENCE
12-01-2013
1 Scope
2 Normative references
3 definitions
4 Requirements
5 Marking and operating instructions
6 Tests
Annex A - Illustrations for mechanical tests
Annex ZA (normative) Normative references to international
publications with their corresponding European publications
Defines the requirements for measurement of equipment applied to testing the phase sequence in three-phase distribution systems. The phase sequence may be indicated by mechanical, visual and/or audible means. Not applicable to ancillary measuring equipment for other quantities, such as voltage testers consisting of an additional phase sequence indicator. Not applicable to monitoring relays.
| DocumentType |
Standard
|
| PublisherName |
Swiss Standards
|
| Status |
Current
|
| Standards | Relationship |
| NF EN 61557-7 : 2007 | Identical |
| DIN EN 61557-7 : 2008 | Identical |
| NBN EN 61557-7 : 2007 | Identical |
| IEC 61557-7:2007 | Identical |
| I.S. EN 61557-7:2007 | Identical |
| EN 61557-7:2007 | Identical |
| UNE-EN 61557-7:2007 | Identical |
| BS EN 61557-7:2007 | Identical |
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