Eaton Electrical SC200 Connecting the Battery Cables if applicable, Battery Fault Protection

Installation

Avoid:

•Installing the batteries next to any heating source or under air ducts.

•Exposing part of a battery string to direct sunlight.

•Any other locations that would cause temperature variations within the batteries.

Battery Fault Protection

A fault protection device (such as a circuit breaker or fuse) must be fitted in series with one of the battery cables of each battery string.

The fault protection device must be:

•Located as close as practical to the corresponding battery string output terminal and

•Capable of disconnecting the potential fault current of the battery string.

The battery circuit breaker(s) of the power system can not be considered as the fault protection device for the battery string(s) and associated wiring.

The interrupt rating of the battery circuit breaker(s) fitted within the power systems is 10 kA. Therefore, the maximum potential short-circuit current of a 48 V battery string must be limited to less than 10 kA or the total internal impedance of the battery string should be greater than 5.7 mΩ.

If a smaller rated external fault protection device is used, then batteries with appropriate internal impedance need to be selected.

Connecting the Battery Cables (if applicable)

This section applies to APS3-059, APS3-061 and APS6-059 power systems only.

Before You Start

Ensure that all the circuit breakers at the front of the power system and the external battery circuit breaker (close to the battery output terminals) are switched OFF.

Before proceeding check you have:

•Battery cable clamp(s) (one for APS3 models, three for APS6-059)

•2 x 25mm blunt ended screws per clamp

•1 x 16mm cable sleeve (50mm long) per clamp

•Battery cable (see specifications below).

Battery Cable Specifications

No battery cables are supplied with APS3-059, APS3-061 and APS6-059 power systems. All battery cables must meet the following specifications and no other cable sizes must be used.

Cable Style and Size: UL 1283*, 4 AWG (25mm2), multi-strand cable

Cable Length: 3m (10 feet) maximum

*Required to maintain approval compliance.

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	IPN 997-00012-41D December 2006