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MX28B1200/2400 MX28B1200/4800 –48 VDC User’s Manual Page 19
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 3.7-1 The 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