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文件名称:Glossary of Circuit Breaker Terms
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更新时间:2012-01-09 14:23:54
Glossary of Circuit Breaker
英语的关于断路器术语的解释
accessory = An electrical or mechanical device that performs a secondary
or minor function apart from overcurrent protection.
accessory cover = A removable cover on the front of a circuit breaker
behind which are mounted the trip unit and all electrical accessories.
adjustable rating plug = A component which plugs into the trip unit,
establishing the ampere rating of the circuit breaker
AIC = Amperes interrupting capacity.
AIR = See amperes interrupting rating.
alarm switch (bell alarm) = See overcurrent trip switch.
ambient temperature rating = Temperature at which the continuous
current rating (handle rating) of a circuit breaker is based; the temperature
of the air immediately surrounding the circuit breaker which can affect the
thermal (overload) tripping characteristics of thermal-magnetic circuit
breakers. Electronic trip circuit breakers, however, are insensitive to normal
(-10° to 50°C) ambient conditions.
ammeter (local current meter) = A module that mounts directly to the
circuit breaker trip unit and reports RMS phase and ground-fault current
values as seen by the trip unit. Current values are displayed one phase at a
time.
ampacity = The current, in amperes, that a conductor or circuit breaker can
carry continuously under the conditions of use without exceeding its
temperature rating.
ampere = The equivalent of one coulomb per second or the steady current
produced by one volt applied across a resistance of one ohm.