BS EN 61557-7:2007 PDF
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 - Phase sequence
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 - Phase sequence
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Дата публикации:
- 29 июня 2007 г.
- ICS:
- 17.220.20
- Технический комитет:
- CENELEC
- SKU:
- BS EN 61557-7:2007
Abstract
What is BS EN 61557-7 – Testing equipment for electrical safety system about?
BS EN 61557-7 is a part of IEC 61557 . BS EN 61557-7 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. BS EN 61557-7 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.
Похожие стандарты
Упомянутые в описании и другие стандарты BS