BS 764-1990 紧急照明系统用的自动转换接触器规范

标准号：BS 764-1990
中文标准名称：紧急照明系统用的自动转换接触器规范
英文标准名称：Specification for automatic change-over contactors for emergency lighting systems
标准类型：K31
发布日期：1990/5/31 12:00:00
实施日期：1990/5/31 12:00:00
中国标准分类号：K31
国际标准分类号：29.120.40
适用范围：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.