Understanding The Interrupter Indicators - S&C Mark VI Instruction Sheet

Understanding the
Interrupter Indicators
An indicator is located on the underside of each
interrupter . The indicators are not meaning-
ful while the interrupters are being closed
and charged. Wait for the inter rupter charging
motors to cease operation before checking
indicator position . The inter rupters will be
automatically closed and charged following an
opening operation .
If the interrupter
CHARGED," the indicator reads "CLOSED ."
See Figure 3 .
If the interrupter is "OPEN and DIS-
CHARGED," the indicator reads "OPEN ." See
Figure 4 .
During normal operation, the interrupter
indicators will only read "OPEN" for a brief
moment after the interrupters have tripped—
before the interrupter charging motors begin
closing and charging the interrupters . If the
manual trip device (Catalog Number Suf-
fix "-T") is furnished, the interrupters will
read "OPEN" after a manual trip operation .
Refer to the instructions for using the manual
trip device in Steps 8 through 10 starting on
page 15 .
is "CLOSED and
"CLOSED and CHARGED"
Figure 3. The interrupter is "CLOSED and CHARGED." The indicator
reads "CLOSED."
"OPEN and DISCHARGED"
Figure 4. The interrupter is "OPEN and DISCHARGED." The indicator
reads "OPEN."
Indicators
S&C Instruction Sheet 712-501 7