Specification for automatic change-over contactors for emergency lighting systems
Specification for automatic change-over contactors for emergency lighting systems
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What is BS 764 - Contactors for emergency lighting systems about?
BS 764 is a British Standard which specifies d.c. and single-phase a.c. automatic double-pole change-over contactors for low voltages up to 250 V employed in conjunction with storage batteries or other alternative source of supply. BS 764 specifies means for automatically changing the current supplied to safety lights from the normal source to the alternative source when the normal source fails, and of reconnecting the safety lights to the normal source when this source is restored.
Who is BS 764 - Contactors for emergency lighting systems for?
BS 764 on contactors for emergency lighting systems is helpful for:
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