S&C Mark VI, Instruction Sheet

Page: 15 / 28

S&C Instruction Sheet 712-501 15
Switch Operation
Tripping the Circuit-Switcher Using
the Optional Manual Trip Device
If furnished, the manual trip device will be
located on a swing out panel inside the Mark VI
CS-1A Switch Operator .
When tripping the Mark VI Circuit-Switcher
using the optional manual trip device (Catalog
Number Suffix “-T”) the interrupters will trip,
clearing the circuit, but the disconnect will not
open .
DO NOT manually open the disconnect
with the manual operating handle . If available,
use a secondary-side disconnect to isolate the
Mark VI Circuit-Switcher to create a visible
gap . Contact your local S&C Sales Office for
more information .
Ç
CAUTION
DO NOT operate the Mark VI Circuit-
Switcher disconnect with the manual
operating handle while using the manual trip
device .
Manual operation of the Mark VI
Circuit-Switcher disconnect could cause
a loss of electrical coordination between
the interrupters and disconnect.
Step 8
Verify that each interrupter is “CLOSED” and the
gas-pressure gauge is in the “OK TO OPERATE”
zone . See Figure 16 .
NOTICE
Verify the disconnect blade position to
determine the “OPEN” or “CLOSED” status
of the Circuit-Switcher . The interrupter
indicators only indicate the state of the
interrupter contacts , and DO NOT indi-
cate the state of the entire Circuit-Switcher .
Step 9
Remove the two-pole pull-out fuseholder for
the motor (and space heater, if furnished) . See
Figure 17 .
Figure 16. The interrupter is “CLOSED AND CHARGED.” The interrupter
reads “CLOSED.” Gauge needle is in the white “OK TO OPERATE” zone.
Motor circuit fuseholder
Figure 17. Remove the motor circuit fuseholder.
CLOSED and CHARGED
“OK TO OPERATE” zone