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WARNING: AGAIN, BEFORE PROCEEDING
WITH THIS CHECK, IT IS NECESSARY THAT
THE PRIMARY CIRCUITS BE DE-ENERGIZED.
1
Manual charging handle
2
Positive interlock
Figure 7. Manual charge handle
WARNING: DO NOT ATTEMPT TO MANUALLY
CHARGE A CHARGED BREAKER. TO DO
SO COULD DAMAGE THE CHARGING
CLUTCH AND MAKE THE MANUAL CHARG-
ING FEATURE INOPERABLE.
5. Raise the breaker to the connect position.
This can be done manually with an elevat-
ing wrench or electrically with an elevat-
ing motor provided with the original equip-
ment.
To elevate the breaker, first–verify the
breaker is in the open position and the clos-
ing springs are discharged. Place the el-
evating control selector switch on the el-
evating motor to "RAISE". A clutch handle
under the elevating motor is then pulled
forward until a limit switch engages to raise
the breaker into the unit. Carefully raise the
breaker and while elevating, note that the
shutter slides open and the breaker studs
center with respect to the openings in the
stationary disconnecting devices or dam-
age to the contacts may result.
6. Hold the clutch handle in the forward posi-
tion until a limit switch on the structure
opens to stop the motor at the end of the
upward travel of the breaker. The springs
will charge when the clutch handle is re-
leased.
Courtesy of NationalSwitchgear.com
PowerVac
CAUTION: THE MOTOR RAISE/LOWER SE-
LECTOR SWITCH MUST NOT BE USED TO
ENERGIZE OR INTERRUPT MOTOR CIRCUIT
AT ANY TIME.
7. When the breaker is fully elevated, the clear-
ance between the breaker lifting rail and
the upper stop bolts should not be more
than .125" and not less than .094".
8. The positive interlock roller should be cen-
tered in the upper "VEE" and the interlock
2
roller should have 1/16" clearance to the
stationary plate directly under it.
9. In order to lower the breaker from the con-
nected position, the breaker should be
open. The closing springs will be dis-
charged when the clutch handle is en-
gaged.
To lower the breaker, place the elevating
control selector switch on the elevating
motor to "lower". A clutch handle in back
of the elevating motor is then pulled for-
ward until a limit switch engages, to lower
the breaker to the bottom of the cubicle.
10.To raise or lower the breaker, the clutch
must be held in the engaged position, oth-
erwise a spring will return it to its disen-
gaged position and open the electrical cir-
cuit to the motor.
CAUTION: THE POSITIVE INTERLOCK LE-
VER ROLLER WILL DISCHARGE THE OPEN-
ING AND CLOSING SPRINGS AS THE EL-
EVATING MOTOR CLUTCH IS ENGAGED.
11. The breaker may be raised or lowered by
an emergency hand crank which can be
inserted after removing the motor. The mo-
tor is removed by unlatching the motor
assembly from its support and disconnect-
ing the motor lead plug. After removing
the motor, insert the manual crank and pull
the clutch forward. Rotate the crank until
the coupling engages the clutch. The
clutch handle will be held in the down
position by a latch on the crank assembly.
The breaker must be open before the crank
can be inserted and held in the clutch cou-
pling.
13
5kV Vertical Lift
®
Chapter 4. Installation
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