User manual

Maintenance 63
Emerson Energy Systems MFA150 Power System  NT6C28C User Manual
Procedure 8 – Adding a distribution circuit breaker ( continued )
Step Action
4 Position the “L” shaped Glastic separator for the new circuit breaker
as shown in Figure 23.
5 Align the new circuit breaker with the appropriate position and insert
the upper stud of the circuit breaker into the hole in the DISCH BAT
busbar.
6 Install the “C” alarm wire as shown in Figure 23.
7 Secure the small busbar at the bottom of the circuit breaker and the
“L” shaped Glastic insulator to the main isolated support with the
screw provided for that purpose as shown in Figure 23.
8 Use a properly insulated wrench to secure the hex nut holding the
circuit breaker and the “C” alarm wire to the DISCH BAT busbar.
9 Connect the “NC” or “NO” alarm wire to the circuit breaker as shown
in Figure 23, depending on whether standard trip or mid trip circuit
breakers are used ( see note below Figure 23 ).
10 If a load is to be connected to the new circuit breaker, feed the load
cable through the rear of the control and distribution panel, install the
appropriate one-hole lug at the end of the cable and connect it to the
vertical stud behind the circuit breaker as shown in Figure 23.
Note: If no load is to be connected and the circuit breaker is a
standard trip type, leave the circuit breaker in the ON position
to prevent annoyance alarms.
11 Remove the appropriate filler position from the black filler plate
mounted on the back of the front door.
12 Reinstall the top panel and close the front door of the control and
distribution panel.
13 Notify the alarm center at the end of the procedure.
–end–
Replace an existing circuit breaker as described in Procedure 9. Refer to
Figure 23.