User manual

64 Maintenance
UM6C28C P0728920 Standard 11.00 April 2001 Emerson Energy Systems
Figure 23 – Cross-section of an installed circuit breaker
Isolated support
Load
Push-on alarm leads
(see note)
Main discharge busbar
(DISCH BAT)
Glastic separator
C
NO
NC
Note: The position of the “C” (common) “NO” (normally
open) and “NC” (normally closed) alarm pins at the rear
of circuit breakers will vary upon the manufacturer of
the circuit breakers. However, the “C” pin should
always be connected to the main discharge bar of the
power plant. The alarm lead should be connected to the
“NO” or “NC” pin of the circuit breakers as follows:
 for standard trip circuit breakers, connect the alarm lead to the
“NC” contact,
 for mid trip circuit breakers, connect the alarm lead to the “NO”
contact.