ITE 5HV-150, Instructions Manual

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Fig. 12-5HV-75 Racking and Indicator Assembly,
"Unlock" Position
with the ground bus in the bottom of the housing.
The main circuit movable disconnecting devices
on the breaker are disengaged and separated a
safe distance from the stationary part of the devices
located on the housings.
If the circuit breaker is put in the "CLOSE"
position, the hole for the racking bar is covered
and the breaker may not be racked to the con­
nected "OPERATING" position, but if the breaker
is in the "OPEN" position the racking handle may
be inserted and the breaker be racked to the con­
nected position.
At all positions of the circuit breaker between
the "RACKED-OUT" and connected "OPERAT­
ING" positions, the latch of the breaker is held in
the disengaged position, so that the breaker may
not be closed either manually or electrically. The
interlock that holds the latch
in
the disengaged
position is mounted on the breaker and is operated
by the racking bar.
With the circuit breaker in the connected
"OPERATING" position, it is usual to connect the
control circuits so that the breaker can be operated
from a control switch mounted on the front of the
housing or from a remote point. The breaker cannot
be operated from the push button station on its
front panel, Figs.
12
and 13. The push button sta­
tion operates the breaker only in the "TEST" posi­
tion. Other connections are sometimes made at the
request of the user.
An outlined procedure for installing and re­
moving a circuit breaker from service is as follows:
INSTALLATION OF 5HV-75
CIRCUIT BREAKERS
I.
The circuit breaker should be in the "OPEN"
position and the indicator at "RACKED-OUT"
position. Indicator for locking device should be
pointing to "UNLOCK" position.
2. With the use of the drawout handle, back the
breaker into the housing so that the guide bar on
the breaker enters the guide slot in the housing.
Push breaker toward rear until breaker reaches the
floor stop which latches it in the "TEST" position.
IO
Fig. 13-5HV-150 and 5HV-250 Racking and
Indicator Assembly, "Unlock" Position
If it is desired to test the breaker for operation
electrically and manually before putting it into
service, it may be done in this position by means
of the push button on the front of the breaker,
Fig.
12
and by means of the maintenance handle
as shown in Fig.
15.
3. With the breaker in the "OPEN" position,
and using the drawout handle, move the release
lever toward the guide slot with the right foot, and
proceed to push the breaker further toward the
rear until the breaker engages the stop in the
housing. Turn locking device to "LOCK" position.
Breaker is now in the "RACKED-OUT" position.
Rack in by inserting the crank and turning clock­
wise, Fig.
17,
until pointer on breaker panel indi­
cates the breaker is in the connected "OPER­
ATING" position, Fig. 18.
REMOVING 5HV -75 BREAKER FROM
HOUSING
1. Trip breaker by means of the control switch
on front of housing.
2. Open door, insert crank and rack breaker,
Fig. 17, to "RACKED-OUT" position as indicated
by pointer on breaker nameplate.
If it is desired to remove the breaker completely
from the housing, continue as follows:
a. Move locking device to "UNLOCK" posi-
tion as shown in Fig.
12.
· ··
b. Apply drawout handle to front wheels and
draw breaker from housing until it reaches the
·floor stop. Move the release lever toward the guide
slot with the right foot and continue to draw the
breaker from housing as shown in Fig. 19.
INSTALLATION OF 5HV-150 AND
5HV -250 CIRCUIT BREAKERS
I.
The circuit breaker should be in the "OPEN"
position and the indicator at "RACKED-OUT"
position. Indicator for locking device should be
pointing to "UNLOCK" position.
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