Brochure

PowerPact H-, J-, and L-Frame Circuit Breakers
Glossary
266
02/2016 © 2011–2016 Schneider Electric
All Rights Reserved
drawout circuit breaker = An assembly of a circuit breaker and a supporting structure (cradle) so
constructed that the circuit breaker is supported and can be moved to either the main circuit connected
or disconnected position without removing connections or mounting supports.
drawout mechanism = A mechanism which engages the drawout cradle assembly and draws the
circuit breaker into or out of the equipment. The drawout mechanism includes the drawout mechanism
shaft, drawout levering device arms and a drawout position indicator.
drawout position indicator = An indicating means which shows the position of the circuit breaker in
the drawout structure.
drawout access cover (drawout shaft cover) = A shutter which allows or restricts access to the
drawout shaft.
electrical closing push button (BPFE) = A push button used to electrically close a circuit breaker
using a shunt close with communication option. This takes into account all safety functions that are
part of the control and monitoring system of the installation.
electrical operator (motor operator) = An electrical device used to open and close a circuit breaker
or switch and reset a circuit breaker. See also spring charging motor.
electronic trip circuit breaker = A circuit breaker which uses current sensors and electronic circuitry
to sense, measure and respond to current levels.
fixed-mounted circuit breaker = A circuit breaker so mounted that it cannot be removed without
removing primary and sometimes secondary connections and/or mounting supports.
frame size = The largest ampere rating available in a group of circuit breakers of similar physical
configuration.
frequency = The number of cycles per second for an alternating current system.
frequency rating = The range of frequencies within which a product can be applied.
ground fault = An unintentional current path, through ground, back to the source.
ground-fault delay = The length of time the circuit breaker trip unit will delay before initiating a trip
signal to the circuit breaker after a ground fault has been detected.
ground-fault module = An electronic accessory used in combination with thermal-magnetic circuit
breakers to provide branch circuit ground-fault protection and ground-fault indication.
ground-fault pickup = The level of ground-fault current at which the trip system begins timing.
handle rating = Continuous current rating.
IDMTL = Long-time delay curve which can be varied in slope to enhance selectivity.
IEC
®
= International Electrotechnical Commission.
IEEE
®
= Institute of Electrical and Electronics Engineers.
Ig = See ground-fault pickup.
Ii = See instantaneous pickup.
In = See sensor rating.
individually-mounted circuit breaker = A circuit breaker so mounted that it cannot be removed
without removing primary and sometimes secondary connections and/or mounting supports.
instantaneous pickup = The current level at which the circuit breaker will trip with no intentional time
delay.
instantaneous trip = A qualifying term indicating that no delay is purposely introduced in the tripping
action of the circuit breaker during short-circuit conditions.
insulated case circuit breaker (ICCB) = UL Standard 489 Listed non-fused molded case circuit breakers
which utilize a two-step stored energy closing mechanism, electronic trip system and drawout construction.