Power Supply For Two Way Radios

BM 108A (13.8V@15A Power Supply cum Battery Charger)

SPECIFICATION

GENERAL

Scope
This specification defines the performance characteristics of a 13.8V, 15A equipment supply cum battery charger operating on Single phase AC supply.

INPUT REQUIREMENTS

PHASE
Single phase, 2 wire and ground.
INPUT FREQUENCY
50Hz ± 3Hz
INPUT VOLTAGE
AC 170V rms to 270V rms.
EFFICIENCY
> 75% at 230V, Full load.

OUTPUT CHARACTERISTICS

OUTPUTS
The power supply has two output terminals i.e., Equipment and the Battery. The Battery is directly floated across the Equipment internally. When battery is connected, the Equipment output terminal Will follo w the battery voltage.
OUTPUT VOLTAGE AND CURRENT
Equipment outpu t-13.80V at 15.0 Amps max.(with out connect battery ) Battery output 13.80V at 7.0 Amps max. (When the wireless set is not In tran smit mode). Maximum output power (Equipment + Battery) is L imited to 210W max.
OUTPUT VOLTAGE ADJUSTMENT
Output Voltage settable from 12.0V to 14.20V DC by adjusting the (V.adj.) potentiometer provided on the front panel.
BATTERY CHARGING
Battery charging will take place with constant voltage, constant current. Maximum charging current of the battery will be limited to 7.0A + 20%. Maximum charging voltage to be 14.00V.
OUTPUT VOLTAGE REGULATIONS
With the Battery disconnected, output voltage will remain with in ± 2% Of the set values. And when battery is connected the output will follow The battery voltage.
RIPPLE & NOISE
Ripple on the outputs ( with battery disconnected ) shall be less than1%, & Noise less than 2%.

PROTECTIONS:

OUTPUT OVER VOLTAGE
PSU trips on output over voltage condition (above 15V) and resume to normal operation on removal of fault condition and AC power Re-cycling with 20sec interval between switch OFF and ON.
OUTPUT OVER LOAD AND SHORT CKT.
Output folds back or Hick Up mode on over power or short circuit condition and resume to normal operation on removal of over power or Short circuit condition.
BATTERY REVERSE POLARITY PROTECTION
On reverse polarity Red LED indication is provided at Battery terminal Connecting side. Charge is protected against the reverse.
BATTERY DEEP DISCHARGE CUT-OFF
During power off condition, the battery supply power to the equipment. When the battery voltage falls below 12.00V B attery low LED Will turn ON and Buzzer alarm will be provided on continues mode. When the battery voltage falls below 10.60V± 0 .20V Battery will be Cut off.

INDICATIONS:

MAINS ON
Will be ON when AC is available.
BATTERY ON
Will be ON when the battery is supplying power to the Radio.
BATTERY LOW
Will be ON when the battery voltage is below 11.80V ± 0.20V will start.
BATTERY REVERSE
Will be ON when the battery is Reverse Connected.
BATTERY LOW
Buzzer alarm will be provided on continues mode. when the Battery Voltage 11.80V ± 0.20V will start.

DISPLAY METERING

VOLTMETER
0 - 20V analog voltmeter provided on the front panel to read the Load and battery voltage.
AMMETER
0 - 20A analog ammeter provided on the front panel to read the Load and battery currents.

COOLING

Free air convection.

ENVIRONMENT

TEMPERATURE
Operating 0 to 50ºC.
HUMIDITY
Operating 5% RH to 85% RH non-condensing.
Storage 5% RH to 95% RH non-condensing.

PRODUCT SAFETY:

DI-ELECTRIC VOLTAGE WITHSTAND TEST
Tested at 1.5KV rms AC for one minute with a trip current of 5mA.
a) Between INPUT and CHASSIS.
b) Between INPUT and OUTPUT.
EARTH GROUND RESISTANCE
To be less than 200m when tested at 10Amp DC current

ENCLOSURE

DIMENSIONS
WIDTH : 260mm , DEPTH : 235mm , HEIGHT : 98mm
WEIGHT
2.90Kgs.