IEC 61557-7:2007
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

Standard No.

IEC 61557-7:2007

Release Date

2007

Published By

International Electrotechnical Commission (IEC)

Status

Be replaced 2019-07

Replace By

IEC 61557-7:2019 RLV

Latest

IEC 61557-7:2019/AMD1:2023 CSV

Replace

IEC 85/295/FDIS:2006 IEC 61557-7:1997

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.

IEC 61557-7:2007 Referenced Document

• IEC 60417 
• IEC 61557-1 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 1: General requirements*， 2019-07-26 Update

IEC 61557-7:2007 history

• 0000 IEC 61557-7:2019/AMD1:2023 CSV
• 1970 IEC 61557-7:2023 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
• 0000 IEC 61557-7:2019 RLV
• 2007 IEC 61557-7:2007 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
• 1997 IEC 61557-7:1997 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