24
S&C Instruction Sheet 716-502
STEP 23.
Insert the motor-and-closing circuit fuse holder.
Then, close the control power KNIFE switch. See
Figure 22.
STEP 24.
Press the CLOSE pushbutton or send a
Close
command to the switch operator. See Figure 16 on
page 20. (TRIP and CLOSE pushbuttons are not
included on operators specifi ed with catalog number
suffi x “-J.” In such instances, momentarily touch a
jumper between terminals 1 and 3 to close the
circuit-switcher.)
The closing latch will release, discharging the
closing spring. This action closes the interrupters.
The switch-position indicator on the high-speed
base will move to the
Closed
position. See Figure
25 on page 26. If the position-indicating lamp option
has been specified, the red lamp will light. See Fig-
ure 16 on page 20.
STEP 25.
When the circuit-switcher is ready to be placed in
service, the motor and closing circuit fuses can—at
the user’s option—be replaced with the slugs
furnished. This practice is recommended for
increased reliability because low-voltage fuses can
be damaged by the repeated inrush current
experienced during normal opening operations and
can “sneak out,” leaving the circuit-switcher
inoperable.
NOTICE
Before replacing these fuses with slugs, make
certain the control-source battery is adequately
protected to prevent discharge using fuses or
circuit breakers located at the battery bus .
STEP 26.
Please complete and mail the Circuit-Switcher
registra tion card. The information requested on this
card is vital to ensure prompt notifi cation in the
event fi eld modifi ca tions are needed.
Figure 21. Check that the interphase drive lever has been con-
nected to the uni-ball coupling and check that the adjustable
locking rod has been removed.
Interphase
drive lever
Adjustable locking
rod (marked with a
black/yellow striped
label)
¾
-inch stainless-steel pin
and cotter pin
Uni - b all
coupling
Figure 22. The motor-and-closing circuit fuse holders and the
control-source knife switch.
Installation
