Page 2
IMPORTANT:
Read manual before installing or maintaining equipment! Make absolutely sure that
equipment is de-energized and properly grounded.
This manual should be used in conjunction with the factory drawings. The drawings contain critical
information, which if not followed could affect the operation of the switch.
Instructions can not cover all possible variations in equipment nor provide for every possible contingency
to be met in connection with installation, operation or maintenance. Should further information be
required or should particular problems arise which are not covered sufficiently for the purchaser’s
purposes, the concern should be referred to the factory.
For Technical Assistance Call 276-688-3328
RECEIVING INSPECTION
Check the shipment for completeness against the
bill of material and installation drawings. If
damage is found, file a claim immediately with the
transportation company and notify your Pascor
Atlantic representative.
HANDLING
Handling of disconnect switches should be done
with care. Porcelain is fragile and may be
damaged due to improper handling.
Factory drawings should be followed during
installation. It is recommended that switches be
fully assembled and adjusted at ground level
before being placed into position. This should
minimize final adjustments.
Lifting of switches by insulators, contacts, or live
parts should be avoided, because of possible
damage to these parts. Attachments for hoisting
should be made to the switch bases unless
otherwise instructed. (See Fig. 2)
CAUTION: When uncrating switches having
blade counterbalances (Fig. 3), open the switch
blade to relieve the pressure of the counter
balance before removing the live parts from the
base.
INSTALLATION AND ADJUSTMENT
If the switches have already been assembled with
insulators at the factory, proceed to step 5.
However, it is recommended that each switch pole
be checked for alignment and proper adjustment
after being mounted on the structure.
Step 1—Check Bases
Check bases to make sure that the spacers and rotor
bearing tops are square and level. The tops of the
two supports on the hinge end must be exactly the
same height. If necessary, make adjustments or
shim. Shims, leveling screws, and adjusting nuts
are shown in Fig. 1 and are explained in step 3.
Step 2—Assemble Insulators
Assemble the insulator stacks to switch base. Do
not disturb the position of the switch crank when
mounting the insulator stack to the rotor bearing, as
the crank has been properly located at the factory.
In some cases, involving higher voltage switches,
the installer may choose to mount the switch bases
on the structure before assembling the insulators.
In such cases the switch bases should be mounted
on the supporting structure in the positions shown
on the installation drawing. The bases should be
level and parallel to each other. Make sure that the
base for the drive phase is in the correct location
and operating cranks are at their proper angles.
Remove the “slack” from the rotating insulator by
rotating the insulator clockwise for all three phases.
