American Power Conversion MX28B200 user manual Circuit Breaker Connections 60-100 Amps

Load Connections should be made as shown in Figure 3.8-1

Figure 3.8-1 Standard lug for 1 to 50A breakers.

NOTE: Load return lugs are connected to the front of the return bus to prevent interfering with the top cover of the unit.

Circuit Breaker Connections (60-100 Amps)

Connections for 60 to 100 amp DC loads are twice as wide as the smaller breakers and therefore require two positions and a circuit breaker adapter kit. The adaptor connects the two output lug positions to one lug. Adaptors are available with studs for #10-32 nuts on 5/8” centers, #10-32 nuts on ¾” centers, or ¼-20 nuts on 1” centers. The adaptor is installed directly above the two positions the circuit breaker is mounted on using #10 screws provided in the kit. The lugs (not included with the kit) fasten on to the adaptor’s studs using nuts and washers provided in the kit.

The load returns connect to the return bus located just above and rearward of the breaker connection points as seen in Figure 2.1-1. The return bus provides 24 sets of threaded #10-32 holes on 5/8” centers and four sets of threaded ¼-20 holes on ¾” centers for connection of two-hole lugs on load return wires.

Load Connections should be made as shown in Figure 3.8-2.

Page 16 MX28B200/400 –48 VDC User’s Manual (990-9133)