用途 APPLICATION
H系列塑料外壳断路器（以下简称断路器），80年代从美国西屋引进，该断路器结构新颖，性能可靠，附件齐全，分断能力高，适用于交流50Hz，或60Hz380V及以下的配
电线路中，作为分配电能和保护线路及
电源设备免受过载，欠电压和短路危害以及在正常工作条件下作为线路的不频繁转换之用。
T和S额日饿死Molded Case Circuit Breakers(hereinafter referred to as
the Breakers or the Breaker) which is introduced from westing-house
corp, USA. Is novel in structure, reliable in performance and
in possession of complete accessories and high interrupting
capacity. It is competently used in distribution circuits of
AC380V, 50Hz,or 60Hz,for power distribution and protection of
circuits and electrical equipment from overload, undervoltage and
shortcircuit, as well as for non-frequent switching under normal
working conditions.
结构 STRUCTURE
●断路器由绝缘外壳、
操作机构、
触头系统和脱扣器等四部份组成，具有快速闭合、断开和自由脱扣机构。
●断路器由瞬时动作的电磁脱扣器和延时动作的热脱扣器组成，分别用作线路的短路和过载保护。250A及以上的断路器，其电
磁铁脱扣器是可调的。
●断路器可以加装分励脱扣器、欠压脱扣器，辅助触头，报警触头和电动操作机构。
●分励脱扣器用作远距离断开断路器。
●欠电压脱扣器用作欠电压保护，当电压低于规定值时，能防止断路器闭合及自动断开断路器。
●辅助触头随主触头相应动作。
●运行过程中，当断路器因故障脱扣后，报警触头作信号报警控制。
●电动操作机构用作远距离闭合或断开断路器。
●The Breaker is composed of 4 parts, I e., the insulating
case, operating mechanism, contact system and tripping device,
featuring quick make and break and free trip.
●The tripping device is basically divided into the
instantaneous electromagnetic release and the time delay thermal
release, which are used for protection of circuit from shortcircuit
and overload respectively. The electromagnetic releases for the
Breakers with a capacity of 250A and above abjustable.
●The Breaker can be attached with shunt tripping device,
undervoltage tripping device, auxiliary contacts ,alarm contacts
and motor-operated drive.
●The shunt tripping device is used for a remote control of
disconnection of the Breaker.
●The undervoltage tipping device is for protecting the circuit
against undervoltage. When the voltage is lower than a specified
value, it can prevent the Breaker from making or the Breaker trips
automatically according to the positions of the Breaker.
●The auxiliary contact can be actuated correspondingly along
with the main contact.
If trip occurs due to a failure during operation, the alarm
contacts fixed in the Breaker are used for alarm control.
●The motor-operated mechanism is used for a remote control of
closing and opening of the Breaker.
