Specifications
92
Molded Case Circuit Breaker A circuit breaker enclosed in an insulated housing. In the United
States, molded case circuit breakers conform to NEMA AB-1 and
UL 489 speciļ¬cations.
ON
OFF
O
800A
I
Typ
e/Typo
NMG
!
!
!
DANGER
DANGER
PELIGRO
F
ra
m
e M
G
150A
OFF
O
I
ON
Type/Tipo
NDG
Frame D
G
150
A
OFF
O
I
ON
T
yp
e
/T
ip
o
NDG
F
ram
e
D
G
Molded Case Switch A switch enclosed in the same type of insulated housing as a
molded case circuit breaker. Siemens molded case switches
employ the same operating mechanism as thermal-magnetic
and magnetic only circuit breakers. A preset instantaneous
function is factory installed to allow the switch to trip and
protect itself at a high fault current, but the switch provides no
thermal overload protection or short circuit protection.
Motor (Electric) A device that transforms electrical energy into mechanical
energy.
Motor Control Center A metal structure containing multiple motor control units.
Typically, individual control circuits are mounted in removable
containers, often referred to as pans or buckets.