GE Industrial Solutions PowerVac PV-VL 13.8-1000-0 and -1 - Manual (Page 64)

Page 65 GEH 6468A - Power/Vac VL Breaker
5. Hold the clutch handle in the forward position
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 released.
CAUTION: THE MOTOR RAISE/LOWER SELEC-
TOR SWITCH MUST NOT BE USED TO
ENERGIZE OR INTERRUPT MOTOR CIRCUIT
AT ANY TIME.
6. When the breaker is fully elevated, the
clearance between the breaker lifting rail and the
upper stop bolts should not be more than .125" and
not less than .094".
7. The positive interlock roller should be centered
in the upper "VEE" and the interlock roller should
have 1/16" clearance to the stationary plate directly
under it.
8. To lower the breaker, proceed the same as for
raising, except, operate the selector switch to
"LOWER". The clutch must be held in the engaged
position, otherwise a spring will return it to its
normal position, opening the electrical circuit to the
motor.
9. The breaker may be raised or lowered by an
emergency hand crank which can be inserted after
removing the motor. The motor is removed by
unlatching the motor assembly from its support and
disconnecting 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
coupling.
WARNING: AGAIN, BEFORE PROCEEDING
WITH THIS CHECK, IT IS NECESSARY THAT
THE PRIMARY CIRCUITS BE DE-ENERGIZED.
CAUTION: THE SPRING DISCHARGE CAM
WILL DISCHARGE THE OPENING AND
CLOSING SPRINGS AS THE BREAKER IS
WITHDRAWN FROM THE UNIT.
10. After the breaker is lowered and withdrawn
from the unit, inspect the contact surfaces of both
the breaker studs and the stationary disconnecting
devices.
a. Each segment of the stationary disconnecting
device should make a heavy impression in the
contact lubricant on the breaker studs. Contact
wipe should start not less than .125" from the top
of the contact ball, although each contact need not
start at the same location.
b. The penetration of the breaker stud inside the
stationary disconnecting device, as indicated by
the contact lubricant, should be .75" to .875". This
indicated that the breaker studs contacted at the
full pressure center of the silver band on the
stationary disconnecting device.
c. Should the inspection of the contacts show
that the breaker is not being raised to the proper
position, readjust the upper stop bolts and limit
switches to raise or lower the breaker to the proper
location. Lock the stop bolts in the new
position.
d. If proper contacting cannot be attained by the
above methods, additional adjustments may be
necessary.
CAUTION: DO NOT MAKE THESE ADJUST-
MENTS. CONTACT YOUR LOCAL GE REPRE-
SENTATIVE FOR ADDITIONAL INFORMATION.
POSITIVE INTERLOCK The positive
interlock functions to prevent raising or lowering a
breaker except when the primary contacts are
open. It also prevents closing the primary contacts
when the breaker is being raised or lowered by
blocking the operating mechanism mechanically
and electrically.
1. Lower the elevating mechanism lifting brackets
until the lifting brackets are in the fully lowered
position. The breaker should then enter the
housing freely. After first assuring that the breaker
primary contacts are in the open position, insert the
breaker into the unit until it rests against the rear of
the front lifting saddle of the elevating mechanism.