American Power Conversion MX28B4800, MX28B2400 manual Installation of Circuit Breakers and Fuses

3.7. Installation of Circuit Breakers and Fuses

Plug-in Circuit Breaker Installation

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

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 3.7-1The breaker alarm terminals are designed to make contact with the alarm terminal board as the breaker is snapped into place.

3)Reattach the circuit breaker cover panel.

NOTE: Circuit breaker alarm contacts close when the circuit breaker is tripped but not when it is turned OFF.

Figure 3.7-1. Installation of Circuit Breakers

MX28B1200/2400 MX28B1200/4800 –48 VDC User’s Manual Page 19