MX28B 9
• Control of either a battery or a load LVD
4.5 AC Input Power
Each rectifier requires 208/220/240V ac, single-phase, 50/60 Hz, supplied through an
external 20-amp two-pole breaker. A rear located enclosure, with two holes for customer-
supplied one-inch conduit entry, provides a terminal strip(s) for ac input power connection
and a separate “Earth Ground” bar for connection of the safety ground wire(s).
4.6 Battery connections
Top entry battery connections are made at the top rear of the unit (see Figure 4.6-1). The
-48V and return buses each provide two sets of threaded 3/8”-16 holes on one-inch centers
for connecting two-hole battery cable lugs.
A battery disconnect breaker is required external to this equipment. The power plant can
monitor auxiliary contacts from this breaker.
Battery temperature compensation is available. Advance Power’s standard temperature
monitor sensor and cable is used to implement this optional function.
Figure 4.6-1. Battery Cable Connection Locations