S&C CS-1A Manual

12 S&C Instruction Sheet 719-501
Operation
Figure 5� Manual operation�
Manual Operation
To open the circuit-switcher manually, follow these steps:
WARNING
Manually closing an energized circuit-switcher is not
recommended because of the possibility of closing into
a fault� Manually opening an energized circuit-switcher
is permissible� When the opening operation has been
initiated, however, it should be completed quickly and
without hesitation� Cranking should continue until the
circuit-switcher is fully open, as indicated by resistance
felt as the circuit-switcher power train progresses to its
stops� As the circuit-switcher moves toward the Open
position, the interrupters will close and the stored-
energy source within the brains will charge and latch�
The circuit-switcher disconnect blades should never
be in the Closed position when the interrupters are
in the Open position� Manually closing the circuit-
switcher may cause arcing, equipment damage,
and personal injury�
STEP 1� Pull the latch knob on the hub of the manual
operating handle and pivot the handle forward
slightly from its Storage position.
STEP 2� Release the latch knob while continuing to pivot
the handle forward to lock it into the Cranking
position. See Figure 1 on page 7 and Figure 5. (As
the handle is pivoted forward, the motor brake is
mechanically released. Both leads of the control
source are automatically disconnected, and both
the “opening” and “closing” motor contactors
are mechanically blocked in the Open position.
However, when the shunt-trip device option is
provided, it remains operative unless the switch
operator is in the Open posit ion.)
STEP 3� Crank the handle in the direction shown on the
arrow plate for the Open position
If desired, during manual operation, the
switch operator may also be disconnected from
the control source by removing the motor-circuit
two-pole pull-out fuseholder, located on the right-
hand inside wall of the enclosure. See Figure 2
on page 8. Likewise, the shunt-trip device may be
rendered inoperative by removing the shunt-trip
circuit two-pole pull-out fuseholder, located on
the left-hand inside wall of the enclosure.
Latch
knob

S&C CS-1A Specifications

General

Brand	S&C
Model	CS-1A
Category	Switch
Language	English