Specification for automatic change-over contactors for emergency lighting systems.

Informácie o norme:

Označenie normy: BS 764:1990
Dátum vydania normy: 31.5.1990
Počet strán: 14
Približná hmotnosť: 42 g (0.09 libier)
Krajina: Britská technická norma
Kategória: Technické normy BS

Anotácia textu normy BS 764:1990 :

Design and performance requirements for d.c. and single-phase a.c. double-pole change-over contactors for low-voltages up to 250 volts and a range of standard current ratings, which are used to provide the automatic transfer of current supplied to safety lights from the normal source to an alternative source when the normal source fails; reconnection is automatic when the normal supply conditions are restored. Status: Confirmed