S&C 2020 User Manual

16 S&C Instruction Sheet 716-504
Installation
Installing the Disconnect Pole-Units
NOTICE
Do not disassemble the insulating support
columns. The insulating support columns,
are filled with lubricated dielectric filler
which prevents contamination from affecting
the dielectric integrity of the column or the
insulated operating rod. An aerator is used
at the upper end of each support column to
eliminate water from being pumped in due to
pressure differentials caused by temperature
cycling. Disassembling the insulating
support column will cause the lubricated
filler to evacuate.
CAUTION
Lift the pole-unit by the pole-unit base
only. Do not attempt to lift the pole-unit by
the interrupter or other live parts. Lifting the
pole-unit by any other means can cause
damage to the pole-unit or personal injury.
Step 12
For 69-kV circuit-switchers with 48-inch
phase spacing: level the support brace to
the same elevation as the high-speed base. If
necessary, loosen the cap screws used to attach
the outboard pole-unit channel bases to the
high-speed base and support brace, and shift the
pole-units to level the support brace. Securely
tighten the cap screws.
For 69-kV - 138kV circuit-switchers with
all other phase spacings:
(a) Install four eyebolts on each pole-unit
base. See Figure11.
(b) Attach four suitable lifting slings to the
channel base of the pole-unit to be
mounted at the center of the high-speed
base—marked “Pole 2”—as shown in
Figure 11. Attach an additional sling
around the support insulator as shown in
Figure 11. This sling is required to
maintain stability during lifting.
(c) Ensure that the rigging does not stress
the disconnect. Unbolt the base from
the skid. Raise the pole-unit a few feet,
then remove the two ½–13×1¾-inch
hex-head galvanized steel cap screws,
at washers, and hex nuts which attach
the shipping bracket to the bottom of the
pole-unit channel base. Discard the
shipping bracket and associated
hardware.
Figure 11. Hoist the pole-unit.
Eyebolts
(not furnished)
Shipping bracket
for insulated
operating rod
Insulating
Support Column

S&C 2020 Specifications

General

Brand	S&C
Model	2020
Category	Switch
Language	English