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Installation of circuit breakers and fuses, Plug-in circuit breakers – American Power Conversion MX28B-400 User Manual

Page 26

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MX28B-400 +24V Product Manual

20

990-9218

A list of GMT type fuses available from APC DC Network Solutions Inc. is provided in Table
5.7-2.

FUSE RATING

PART NUMBER

1/4 A

FFA-0030

1/2 A

FFA-0031

3/4 A

FFA-0032

1 A

FFA-0033

1¼ A

FFA-0039

1½ A

FFA-0035

3 A

FFA-0036

5 A

FFA-0037

10 A

FFA-0038

Table 5.7-2. GMT Fuses

5.7.2 Installation of Circuit Breakers and Fuses

5.7.2.1 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 5.7-1

. 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.