Power Supply For Two Way Radios

BM5M20A (12.8VDC @20.0A Multi Battery Charger)

SPECIFICATION

GENERAL

Scope
This specification defines the performance characteristics of Float to Boost Multi Battery Charger.
Description
Multi charger consist of 5 individual battery chargers.

INPUT CHARACTERISTICS

INPUT VOLTAGE RANGE
170VAC - 270VAC
INPUT FREQUENCY RANGE
50Hz ± 3Hz
INRUSH CURRENT
< 30A peak @ 230VAC,cold start @ 25º C.
INPUT CURRENT
< 12.50A RMS @ 170VAC and output full load
EFFICIENCY
> 80% under all line conditions and full load.

INDIVIDUAL OUTPUT CHARACTERISTICS

OUTPUT FLOAT VOLTAGE
13.70VDC ± 0.50V
OUTPUT BOOST VOLTAGE
14.70VDC ± 0.50V
OUTPUT CURRENT
20 .0Amp, ± 0.5A
RIPPLE
< 200mV. Pk - Pk, at Nominal Input
NOISE
< 400mV. Pk - Pk, at Nominal Input
(measured with 0.1μF ceramic disc & 10μF Electrolytic capacitor
across output in 20 MHz bandwidth oscilloscope.)
OUTPUT OVER CURRENT LIMIT MIN. POINT
> 19.5Amp Current limit at internal.
OUTPUT OVER CURRENT LIMIT MAX. POINT
< 20.50Amp Current limit at internal.
BOOST-FLOAT CHANGE OVER CURRENT
3Amp - 5Amp current
FLOAT-BOOST CHANGE OVER
When ever discharged battery is connected to charger the output Voltage goes to boost charging mode and will start charging the Battery. Once Battery is fully Charged the output voltage will change from boost to float mode and maintains the battery in fully charged Condition.

PROTECTIONS:

OUTPUT OVER LOAD / SHORT CIRCUIT PROTECTION
The power supply is fully protected against over load & short circuit. During over load output will fold back and resumes to normal operation on removal of over loads. During short circuit at output the power supply will go in to hick up mode and resumes normal operation on Removal of the short circuit.
CHARGE CHANGE OVER PROTECTION
Once Battery is fully Charged the protection circuit changes from Boost mode to Float mode and it does not allow further charging. During charging time when ever the battery charging current reduces to 4.0A ± 1.0A the output will change from boost to float mode.
BATTERY REVERSE PROTECTION
On reverse polarity Red LED indication is provided near the Rear panel terminal side. Charger is protected against the reverse connection.

ENVIRONMENT

TEMPERATURE
Operation Ambient 0ºC to + 50ºC ambient.
Storage 0ºC to + 75ºC ambient.
HUMIDITY
Operating 5% RH to 95% RH non-condensing.
Storage 5% RH to 95% RH non-condensing.

PRODUCT SAFETY:

DI-ELECTRIC VOLTAGE WITHSTAND TEST
Tested at 3.0KVAC rms at 50Hz for 60 Sec. with a trip current of 5mA. 1. Between INPUT and OUTPUT.
INSULATION RESISTANCE
When tested with a 500VDC Megger shall not be < 20 Mega Ohms Between Shorted INPUT and Shorted OUTPUT Terminals.

EMI/EMC:

CONDUCTED & RADIATED EMISSION
De signed to meet CISPR22 CLASS-A

MTBF:

25,000 hours at full load and 25ºC ambient conditions.

INDICATIONS:

OUTPUT ON & BATTERY FULLY CHARGE
GREEN LED is provided to indicates mains ON & Battery is fully Charged.
BATTERY CHARGING
RED LED is provided to indicate battery charging.
BATTERY REVERSE
RED LED is provided to indicate battery reverse connection.

OVER TEMPERATURE PROTECTION:

The power supply is protected against over temperature. In case of over temperature the power supply output gradually reduced, O/P Power limits & recovers normal operation automatically when the temperature reduces.

DISPLAY METERING

VOLTMETER
0 to 20V analog voltmeter provided on the front panel to read the Load and battery voltage.
AMMETER
0 to 25A analog ammeter provided on the front panel to read the Load and battery currents.

COOLING

Forced air cooling.

TERMINATIONS:

AC Input
3Pin 3Core AC Plug 16A / 250V Connect to rear panel side.
DC Output
DC Output 30A / 250V Banana Socket Connect to rear panel side.

ENCLOSURE

DIMENSIONS
WIDTH : 320mm , DEPTH : 890mm , HEIGHT : 165mm
WEIGHT
16.30Kgs.