INTRODUCTION The Auto Charge-3 STEP CHARGER, Model 091-127-XXX-YY-(ZZZ)(WW) is a compact, completely automatic single channel battery charger designed specifically for periodic charging. Refer to Specifications section of this manual for Model Number Composition. Of rugged construction, the charger is made to withstand the shock and vibration encountered in vehicle mounted equipment.
PRINCIPLES OF OPERATION A three-step lead acid battery charger operates in the three stages described below: 1) A discharged battery is recharged at a constant current (bulk charge) until its voltage reaches an overcharge level of 2.48 volts per cell. At this time the charger will switch to Finish Charge.
UNDER VOLTAGE Under Voltage signaling is provided as an optional feature. It is supplied as relay contact closures internal to the charger in accordance with the following specifications. Interface Voltage and Current Rating: per NEMA Classification for AWG 18 wire and Customer Interface distance.
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THREE STAGE CHARGING CURVE ABSORPTION STAGE BATTERY CURRENT FLOAT STAGE BATTERY VOLTAGE Voltage Increasing Voltage Constant Voltage Constant Current Constant Current Decreasing Full Charge Maintained TIME STAGE I STAGE III STAGE II CONSTANT CURRENT CONSTANT VOLTAGE CONSTANT VOLTAGE (BULK) (FLOAT) (ABSORPTION) Figure 1...
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NOTE: This charger is designed to have it’s output voltage compensated for changes in Temperature. A switch on the circuit board selects whether the unit is operated in the compensated or uncompensated mode. WHEN IN THE TEMPERATURE COMPENSATED MODE THE THERMISTOR MUST BE CONNECTED. Operation without the thermistor while in the compensated mode will result in loss of voltage control and overcharging of the battery.
Under Voltage: Add suffix "UV" to Model Number for Under Voltage signaling option. Fifty (50) Hz Operation: 230VAC input power operation only. Add "/50" as suffix to 230 in Model Number for 50Hz operation. Example: 091-127-XXX-YY-230/50. Model Number Composition: 091-127-XXX-YY-ZZZ-WW...
Kussmaul Electronics Company, Inc. shall have no liability for dam- ages of any kind to associated equipment arising from the installation and /or use of the Kussmaul Electronics Company, Inc. products. The pur- chaser, by the acceptance of the equipment, assumes all liability for any damages which may result from its installation, use or misuse, by the purchaser, his or its employees or others.