I.B. 3A74499B
Page 6
Effective 11/97
3-2 HANDING
DO NOT USE ANY LIFTING DEVICE AS A PLAT-
FORM FOR PERFORMING MAINTENANCE, REPAIR
OR ADJUSTMENT OF THE BREAKER OR FOR
OPENING, CLOSING THE CONTACTS OR CHARG-
ING THE SPRINGS. THE BREAKER MAY SLIP OR
FALL CAUSING SEVERE PERSONAL INJURY.
ALWAYS PERFORM MAINTENANCE, REPAIR AND
ADJUSTMENTS ON A WORKBENCH CAPABLE OF
SUPPORTING THE BREAKER.
Type W-VAC breaker shipping containers are designed
to be handled either by use of a rope sling and over-
head lifting device or by a fork truck. If containers must
be skidded for any distance, it is preferable to use roller
conveyors or individual pipe rollers.
Once a breaker has been inspected for shipping dam-
age, it is best to return it to its original shipping container
until it is ready to be installed in the Metal-Clad
Switchgear.
When a breaker is ready for installation, a lifting yoke in
conjunction with an overhead lifter or portable floor lifter
can be used to move a breaker. In some instances, this
is preferable to rolling the breaker on the floor using self
contained wheels on the cradle or carriage. If the break-
er is to be lifted, position the lifting yoke over the break-
er and insert lifters into the breaker side openings with
the lifting hole toward the interrupters. Once the lifting
yoke is securely seated in the lifting holes, the breaker
can be carefully lifted and moved.
3-3 STORAGE
If the circuit breaker is to be placed in storage, maxi-
mum protection can be obtained by keeping it in the
original container.
Before placing it in storage, checks should be made to
make sure that the breaker is free from shipping dam-
age and is in satisfactory operating condition.
The breaker is shipped with its contacts open and clos-
ing springs discharged. The indicator on the front panel
should confirm this. Insert the maintenance tool in the
manual charge socket opening (Figures 3-2 and 4-1a).
Charge the closing springs by pumping the handle up
and down about 38 times until a crisp metallic "click" is
heard. This indicates that the closing springs are
charged and is shown by the closing spring "charged"
(yellow) indicator. Remove the maintenance tool. Push
the "manual close"button. The breaker will close as
shown by the breaker contacts "closed" indicator. Push
the "manual trip" button. The breaker will trip as shown
by the breaker contacts "open" indicator. After complet-
ing this initial check, leave the closing springs "dis-
charged" and breaker contacts "open"
(Figures 3-2, 4-1c and d).
Outdoor storage is NOT recommended. If unavoidable,
the outdoor location must be well drained and a tempo-
rary shelter from sun, rain, snow, corrosive fumes, dust,
dirt falling objects and excessive moisture must be pro-
vided. Containers should be arranged to permit free cir-
culation of air on all sides and temporary heaters should
be used to minimize condensation. Moisture can cause
rusting of metal parts and deterioration of high voltage
insulation. A heat level of approximately 400 watts for
each 3 cubic meters of volume is recommended with the
heaters distributed uniformly throughout the structure
near the floor.
Indoor storage should be in a building with sufficient
heat and circulation to prevent condensation. If the
building is not heated, the same general rule for heat as
for outdoor storage should be applied.
!
WARNING
Содержание 36W-VAC25
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