APC MX06 50 User Manual download pdf (Page 11)

MX06 Power Plant User’s Manual Page 7

3.4. Battery Connections

WARNING: Hazardous energy levels are present on bare conductors in

the -48VDC distribution connection area of the plant. Accidental shorting of

distribution conductors can cause arcing and high currents that can cause

serious burns or other physical harm. It is recommended that:

• Remove any jewelry, rings or watches while working on this

equipment.

• Use insulated wrenches, screwdrivers, cutters, pliers and other tools.

Planning the Battery installation

The battery cable(s) should be sized to limit the voltage drop from the DC power plant to the

battery during charging per system design requirements. The cable(s) must also carry the full

load current during battery operation. If assistance is required to determine the necessary

cables for the application, contact your sales representative or APC (Refer to Chapter 7 for APC

Customer Support information.

An external fuse or circuit breaker (various options are available from APC) is recommended in

the negative line (located at the battery end) to protect the cables from the battery to the DC

power plant. The power plant can monitor auxiliary contacts from this breaker.

Connecting the Battery Cables

WARNING: Make certain that the battery polarity is correct when making

connections to the DC power plant. Incorrect connection could cause

severe equipment damage.

The battery cable connections are located at the rear of the unit as shown in Figure 3.4-1. The

battery positive and battery negative buses each provide a pair of #10-32 studs on 5/8” centers

for connecting two-hole battery cable lugs. A ring size of 0.221 in (5.6 mm) may also be used.

Connect the battery cables as applicable using #10-32 nuts. Cover all battery connections with

heat shrink after assembly.

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APC MX06 50 User Manual Page 11