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Demand test descriptions and error codes - Avaya Support

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Figure 10: Power-Distribution Unit (J58890CH-1)<br />

Power Backup<br />

CARR-POW (Carrier Power Supply)<br />

The small battery is at the center rear of the multicarrier cabinet. This 8-AH (Amp Hour) battery<br />

is fused for short circuit protection <strong>and</strong> is charged by the J58890CH-1. The batteries also<br />

contain a thermal sensor that changes the charging voltage depending on battery temperature.<br />

The small batteries provide short-term battery holdover. If AC power fails, 48-V DC batteries<br />

power the system for:<br />

● 15 seconds in a PN cabinet<br />

● 10 minutes in the expansion control carrier in the “A” position of a PN cabinet<br />

Figure 11: Small Battery Assembly shows the small battery assembly.<br />

Issue 5 May 2009 257

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