beautypg.com

Installation of circuit breakers and fuses, Plug-in circuit breakers – APC DC Power Plant MX28B-1200 User Manual

Page 32

background image

MX28B-1200 PRODUCT MANUAL

Revision B

26 MX28B-1200/2400

Fuse holders that accommodate telecom fuses are located in a separate fuse power distribution
box frame. The fuse holders are designed to hold Bussmann® (or equivalent) TPL-series fuses
in sizes of 70 amps to 600 amps. The following stock sizes are available from APC:

FUSE

RATING

APC PART

NUMBER

200 A

FFA-0106

300 A

FFA-0093

600 A

FFA-0099

Table 5-5 Telecom Power Fuses

5.8.2 Installation of Circuit Breakers and Fuses

5.8.2.1 Plug-in Circuit Breakers

1) Remove the circuit breaker cover panel and the plastic cover(s) from the desired

location(s).

2) Install the circuit breaker(s) by snapping the top terminal onto the upper bus bar and

rotating the unit down until the second terminal snaps onto the breaker termination post
as shown in Figure 5-9. The breaker alarm terminals are designed to make contact with
the alarm terminal board as the breaker is snapped into place.

NOTE: Circuit breaker alarm contacts close when the circuit breaker is tripped but

not when it is turned OFF.

***** CAUTION *****

During circuit breaker installation, carefully align the breaker alarm terminals with the alarm
terminal board to avoid breaker terminal damage.

3) Reattach the circuit breaker cover panel.

This manual is related to the following products: