ITE 5HV-150, Инструкция по эксплуатации

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IB-5909
Fig. 7 -Front View of Housing
The shutter in
2000
and
3000
ampere housings
has different construction from that shown in Fig.
7
but its operation, as far as the breaker is con­
cerned, is the same.
BUS INSULATION
All primary bus work in the housing, with the
exception of the ground bus, is covered with either
molded insulation or sealer and tape. The molded
insulation is used for long straight through runs
and the sealer and tape are used for joints and
bends or any other place where molded insulation
is not adaptable.
PRIMARY DISCONNECTING DEVICE
Each primary terminal of a drawout circuit
breaker is equipped with a disconnect device of
the blade and multi-finger type.
The multi-finger parts are mounted on the circuit
breaker, permitting inspection of them when the
breaker is removed. This is a high pressure self­
aligning contact. All parts are silver plated, giving
a low millivolt drop. The divided path through the
8
Fig. 8-Primary Disconnecting Device
fingers tends to increase the contact pressure dur­
ing a short circuit. All contact finger springs are
outside the current path.
The stationary disconnecting device is rigidly
mounted in an insulating molding of cylindrical
shape located within the main bus housing. See
Fig. 8.
For the
SHV-350
housing, the disconnecting
device is similar, but mounted in a molding of
rectangular outline.
SECONDARY DISCONNECTING DEVICES
All circuit breakers are provided with separable
disconnecting devices of the self-aligning pressure­
type. These devices are amply proportioned for
carrying the required amount of current. The
flexible member of the device is mounted on the
breaker frame to facilitate inspection and main­
tenance. These devices make contact in the fully
connected and test position, and no test jumper is
needed. See Fig. 9 for the
5HV-75, 5HV-150
and
5HV-250
disconnecting device. The corresponding
devices for the
5HV-350
are constructed differ­
ently as shown in Fig.
10,
but operate in the same
manner.
Fig. 9-SHV-75, SHV-150 and SHV-250
Secondary Disconnecting Device
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