Thomas & Betts 20D, 15D owner manual Battery charger stages are

BATTERY CHARGING

NOTE: Freedom battery chargers are ON whenever AC power is connected to the charger input. The charger can be turned OFF using the CHARGE switch on the front of the unit. This sequence will occur each time external AC power is available. The charger can be turned ON/OFF using the Remote Control Panel or Link Instrumentation.

Each time the battery charger is engaged, the 3-stage charger proceeds automatically, resulting in an efficient complete charge and safe battery maintenance. Use of the Remote Control Panel or Link Instrument provides the ability to periodically apply an equalizing charge.

Refer to Remote Control Panel or the Link Instrument Owner’s Manual for more information.

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The battery charger stages are:

Stage 1 - Bulk Charge During the bulk charge stage most of the energy that has been consumed during discharge is returned to the battery bank. This phase is engaged as soon as the battery charger is activated. Full rated charger current is delivered to the battery bank until the bulk charge voltage limit is reached. This results in a relatively rapid recharge.

Generally, a wet cell battery bank should not be charged at a rate which exceeds 25% of its capacity.

Part No. 90-0123-00 Libertycombi.p65 10/26/98