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Battery chargers, rectifiers, dc power systems by SENSBattery chargers, rectifiers, dc power

LC Battery Charger

Premium Battery Charger Performance at a Low Price.

  • Automatic 2-rate charging - offers fastest battery charging and lowest
    water consumption.
  • Temperature compensation - eliminates the No. 1 cause of premature battery failure.
  • Current limited - protects charger from overload; crank disconnect not required.
  • Aluminum housing - gives modern appearance and corrosion protection.
  • Proven SENS quality - means years
    of trouble-free service.
  • Take Charge of Your Batteries-
Battery charger by SENS


Battery Charger Product Highlights

SENS LC battery charger offers accurate, completely automatic charging of lead-acid and nickel-cadmium batteries. Unlike unregulated "battery boilers" or poorly regulated ferro-resonant chargers, the LC's output voltage automatically adjusts to changing input, load, battery and ambient conditions. The result is fast battery charging without overcharging and consequent loss of battery electrolyte.

The LC's 2-rate charging offers faster battery recharge than single-rate chargers with higher amp ratings. Standard LC features include AC line compensation, precision voltage regulation, current limiting, automatic 2-rate charging, ammeter and temperature compensation.


Charger Specifications

Input Frequency & Voltage Range
115 V, 60 Hz standard; 230 V, 50/60 Hz optional.


Battery chargers, rectifiers, dc power systems model number

12, 24, 36 and 48 volts nominal. Adjustable float voltage. Boost voltage is fixed at approximately 5% above float voltage. 3.5 amps maximum current. 2.3 amps maximum for 48-volt units.

Output Voltage Regulation
+1% of the correct temperature-compensated value from no load to full load with simultaneous variations in input voltage of 10% and frequency of 5%.

After a battery has been discharged or when AC power is restored following a power failure, the charger operates in the high-rate constant current mode until the battery voltage rises to the pre-set boost level. Once this boost level is reached, the charger operates in constant voltage boost mode until the battery's current acceptance falls to less than 70% of the charger's rated output. The charger then reverts to the lower float voltage, where it operates until another battery discharge or AC failure.

Temperature Compensation
All batteries have a negative temperature coefficient. SENS LC is equipped with temperature compensation to assure correct charging in all conditions.

Current Limiting & Overload Protection

  • Electronic current limiting.
  • AC & DC fuses.
DC ammeter: 2.5" scale.


  • Internal adjustment for float voltage.
  • Boost voltage is fixed at approximately 5% above the float level.

Operating temperature: -10C to +50C.
Humidity: 5% to 95% non-condensing.

Housing: Clear anodized aluminum, wall mounted.


Battery charger mechanical drawing

UL listed (115 V, 60 Hz only).

Charger part numbers

SENS LC Battery Charger Specification
Low-Cost Generator Set Battery Charger

Battery Charger Design Guidelines
This specification is for engine starting applications where "trickle chargers" were used, where the required amperage typically does not exceed 5 amps, and where improved gen-set starting reliability is necessary. Charger shall be designed for heavy-duty industrial service and capable of full-rated output indefinitely at temperatures between -10 C and +50 C. The charger shall be capable of recharging a fully discharged battery of the maintenance-free lead acid, conventional (wet) lead acid or nickel-cadmium type. Charger shall maintain the battery automatically and minimize the need for battery electrolyte replenishment. Conservatively rated SCRs and diodes in full-wave bridge shall be used. A crank disconnect relay shall not be required to protect the charger from overload. Regulation shall not be by cycling charger on and off. Charger shall be wall mounted and natural convection cooled. The housing shall be constructed of rustproof metal (e.g. aluminum) and treated with a protective coating.

Battery Charger Standards
The charger shall be designed and built in accordance with applicable NEMA standards, UL 1012, and the best commercial practice for industrial-grade battery chargers. The manufacturer shall maintain a comprehensive quality control system and shall be ISO 9001 or ISO 9002 registered.

Battery Charger Input
Charger shall operate from: 50 Hz (48 to 53 range) or 60 Hz
(57 to 63 range).
Nominal input voltage shall be: (120V or 230V).
Input shall be fused. Proven surge suppression devices shall be fitted.

Battery Charger Output

General Characteristics
Output voltage shall be (12, 24, 36, or 48) volts nominal. Output current shall be sufficient to fully recharge a battery within six hours after supplying six starting attempts of 45 seconds each to a starter with a rolling current of 1,000 amps. Full rated output current shall be available at both float and high-rate voltage settings. Charger shall be equipped with an output fuse and electronic current limit. The charger's current limit shall be fixed at 100%, and shall protect the charger against damage caused by an output short circuit. Output voltage shall be adjustable via an internal potentiometer.


Regulation and Temperature Compensation
Voltage regulation shall be within +1 of the correct temperature-compensated value from no load to full load with simultaneous variations of +10% input voltage and +5% input frequency. DC output shall be constant voltage and current limited. The charger shall be protected against damage by reverse connection of the battery.


Charger shall incorporate automatic ambient temperature compensation to maximize battery performance and life. Temperature coefficient shall be (-0.2%) per degree C to assure correct charging in all temperatures.

Float/Equalize Control
The charger shall be equipped with an automatic high rate (equalize) charge facility operating in response to the battery's state of charge. Charger shall operate at the high rate until the battery is fully charged, then revert to float voltage to prevent overcharging. High-rate operation shall be governed by the requirement of the battery. Mechanical or electronic timers shall not be used. Boost voltage shall be a fixed increment above the float voltage.

A meter for output amperes shall be provided.

The battery charger shall be Stored Energy Systems type LC or approved equivalent.



Power Factor Inc.

2526 Manana Suite 102 Dallas, Texas 75220


Established 1996

While every precaution has been taken to ensure accuracy and completeness in this literature, Power Factor Inc. assumes no responsibility, and disclaims all liability for damages resulting from use of this information or for any errors or omissions. Specifications subject to change without notice.
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