Battery Charger Product Highlights
SENS FC and FCA battery chargers offer accurate,
automatic charging of lead-acid and nickel-cadmium batteries. Unlike
unregulated "battery boilers" or poorly regulated ferro-resonant chargers,
the output voltage automatically adjusts to changing input, load, battery
and ambient conditions. This prevents battery overcharging and consequent
loss of battery electrolyte.
SENS FC/FCA chargers are ideal for either lead-acid or
nickel-cadmium batteries.
Standard FC features include AC line compensation, precision
voltage regulation, current limiting, automatic 2-rate charging, voltmeter
and ammeter, temperature compensation, and UL listing in most sizes.
The FCA offers, in addition, a comprehensive alarm system that
meets NFPA requirements.
Charger Specifications
Input Frequency & Voltage Range
60 Hz standard; 50 Hz optional, +5%.
120 volt standard; 100, 208, 230, 277, 380, 480 volt optional, +10%.
Output Voltage
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%.
AUTOBOOST
(See Figure 1)
After battery discharge or AC failure, the charger operates in the high-rate
constant current mode until the battery voltage rises to the pre-set BOOST
(EQUALIZE) level. The charger will operate in this constant voltage BOOST
mode until the battery's current acceptance falls to 70% of the charger's
rating. At this point, the charger reverts to the lower FLOAT voltage, where
it remains until another battery discharge or AC failure.
Temperature Compensation
(See Figure 2)
All batteries have a negative temperature coefficient. SENS FC/FCA is
equipped with the appropriate temperature compensation (-0.2% per deg. C) to
assure correct charging in all conditions. Remote sensing of battery
temperature is optional.
Current Limiting & Overload Protection
(A) Indicates alarms; X specifies alarm configuration (See
Model Number Breakout to specify alarm configuration).
*120 VAC input only
SENS FC/FCA Battery Charger
Specification
Generator Set Battery Charger,
Single-Phase Input
Battery Charger Design Guidelines
Charger shall be designed for heavy-duty industrial service and capable of
full-rated output indefinitely at temperatures between -20º C and +50º C.
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. 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
Where required, the charger shall be listed by UL, ETL or another recognized
testing authority to the most recent revision of UL specification 1012. 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: (100V, 120V, 208V, 230V, 277V, 380V
or 480V).
Charger shall incorporate a soft-start feature in which the output is
gradually increased from zero to full, required output within 5 to 10
seconds. Input protection shall consist of fuses or circuit breakers. Proven
surge suppression devices shall be fitted.
Battery Charger Output
General Characteristics
Output voltage shall be (12 or 24) volts nominal. Float voltage shall be
adjustable from 100% to 120% of nominal. Equalize voltage shall be
adjustable up to 15% above float voltage. Output voltage adjustments shall
be on separate potentiometers in the charger. Charger shall incorporate
automatic current limiting with a rectangular current limit characteristic,
and shall be capable of operating into a short circuit or dead battery
indefinitely without damage or overheating. Charger shall be equipped with
output fuses or circuit breakers.
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.
The DC output shall be constant voltage and current limited. The charger's
current limit shall be fixed between 100% and 110%. Input transient
protection shall be provided. The charger shall be protected against
damage by reverse connection of the battery.
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.
Charger shall incorporate automatic ambient temperature
compensation to maximize battery performance and life. Temperature
coefficient shall be (-0.18%) per degree C to assure correct charging in all
temperatures.
Charger shall automatically compensate for voltage drop in
the charging leads to prevent charging errors due to long cable runs.
Float/Equalize Control
Charger shall include an automatic equalize feature that is activated when
the battery's state of charge is reduced. Individual adjustment
potentiometers shall be provided for float voltage, boost voltage and alarm
voltages.
Indicators and Optional Alarms
Meters for output amperes and voltage shall be provided.
The battery charger shall incorporate an alarm system
(optional) providing indication of charger and battery status by LED
displays and form C contacts. Separate contacts for AC fail, low-battery
voltage, high-battery voltage, and charger fail shall be provided. An LED
shall indicate input power on.
The battery charger shall be Stored Energy Systems type FC
or approved equivalent. Battery chargers with optional alarms shall be
Stored Energy Systems type FCA or approved equivalent.
UPS Systems
Emergency Lighting
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