S&C CS-1A Manual

S&C Instruction Sheet 719-501 7
Overview
The Type CS-1A Switch Operator is a high-speed operator
having an operating time of 1.5 seconds maximum. It
is expressly designed for power operation of MarkV
Circuit-Switchers.
High-speed, high-torque power operation of Mark V
Circuit-Switchers, by means of the Type CS-1A Switch
Operator, is essential to attain the two-time duty-cycle
fault-closing ratings of 30,000 amperes RMS three-phase
symmetrical, 76,500 amperes peak for vertical-break
style and integer-style models; and two-time duty-cycle
fault-closing ratings of 40,000 amperes RMS three-phase
symmetrical, 102,000 amperes peak for center-break style
models.
Power operation also provides opening and closing
without hesitation under ¾-inch (19-mm) ice formation
for vertical-break style and integer-style models, 1½-inch
(38-mm) ice formation for center-break style models; close
interphase simultaneity; long life of fault-closing contacts
under normal operating duties; and avoidance of exces-
sive switching transients due to prolonged or unstable
prestrike arcing.
Because of its high-speed operation, the Type CS-1A
Switch Operator is not suitable for use with switches of
other manufacture.
Before operating the Type CS-1A Switch Operator,
become familiar with the parts of the switch operator
and Mark V Circuit-Switcher, as shown in Figures 1 and
2 on pages 7 and 8.

S&C CS-1A Specifications

General

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