IEC 61557-7
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 7: Phase sequence
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| Organization: | IEC |
| Publication Date: | 1 January 2007 |
| Status: | inactive |
| Page Count: | 20 |
| ICS Code (Power transmission and distribution networks in general): | 29.240.01 |
| ICS Code (Measurement of electrical and magnetic quantities): | 17.220.20 |
| ICS Code (Electrical insulation in general): | 29.080.01 |
scope:
This part of IEC 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.
This part of IEC 61557 does not apply to ancillary measuring equipment for other quantities, for example voltage testers comprising an additional phase sequence indicator. It does not apply to monitoring relays.
NOTE Phase lamps are not considered to be voltage testers.
Document History
August 1, 2023
Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures – Part 7: Phase sequence
This part of IEC 61557 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be...
August 1, 2023
AMENDMENT 1 Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures – Part 7: Phase sequence
A description is not available for this item.
July 1, 2019
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 7: Phase sequence
This part of IEC 61557 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be...
IEC 61557-7
January 1, 2007
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 7: Phase sequence
This part of IEC 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...
February 1, 1997
Electrical Safety in Low Voltage Distribution Systems up to 1000 V a.c. and 1500 V d.c. - Equipment for Testiong, Measuring or Monitoring of Protective Measures - Part 7: Phase Sequence
A description is not available for this item.