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
- 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
- Proven SENS quality - means years
of trouble-free service.
- Take Charge of Your Batteries-
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.
|Input Frequency & Voltage Range
115 V, 60 Hz standard; 230 V, 50/60 Hz optional.
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
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.
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.
UL listed (115 V, 60 Hz only).
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.
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
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.
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
A meter for output amperes shall be provided.
The battery charger shall be Stored Energy Systems type LC or approved