AP-6612 LVPS/BC

	FEATURES INCLUDE
	• Seamless transition from voltage source to current source
	• Complete Fault Detection Diagnostics
	• Feedback signals to system include:
		- Battery Over Temperature - LVPS/BC Failure - Battery Low Voltage
	• Full Bridge IGBT Output Stage

The APS AP-6612 Low Voltage Power Supply and Battery Charger (LVPS/BC) was designed for commuter rail car applications with abilities to communicate with the car systems to indicate LVPS/BC status. Displays on the front panel include a numeric readout of voltage and current as well as LED indicators for nominal battery voltage, normal input voltage, battery over temperature, LVPS/BC failure, low battery voltage, overload latch and phase loss. Internally, there are a series of LED indicators to determine the status of the full bridge IGBT power stage.

The APS LVPS/BC is designed to have seamless transition from voltage mode to current mode. In voltage mode, the LVPS/BC will regulate to 74VDC when the battery is at 25°C. As the temperature of the battery changes, the LVPS/BC will remain in voltage mode and adjust its output to the optimum value for charging the battery. If the output current exceeds 150A, the LVPS/BC will seamlessly transition from voltage mode to current mode. The output voltage of the LVPS/BC folds back to limit the current to 150A. As the load decreases to a value less than 150A, the LVPS/BC will seamlessly return to voltage mode and return to the voltage determined by the battery temperature.

Specifications

INPUT

Voltage Range ………………420VAC to 530VAC
Frequency ………………….………… 54 to 66 Hz

OUTPUT (TBAT = 25°C)
Voltage ………...…….……….… 74VDC Nominal
Output Current Range …………….. 0 to 150ADC
Output Voltage Ripple ….………………. < 1% F.S.
Efficiency.… …………….…………………….. 90%

ENVIRONMENTAL
Operating Temp. Range ……..…… -20°C to 50°C
Storage Temp. Range …….……. -40°C to +85°C
Humidity ….………… 0 to 95%, Non-Condensing
Cooling ………………...…………. Internal Blower

PHYSICAL SPECIFICATIONS
Dimensions, Inches …….. 18”W X 30”H X 8.25”D
Case Material .………….…….………….…... Steel
Finish .…..…………………... Epoxy Powder Coat
Color ……………….………………………… White

Input Connectors
J1 - Input Power
J2 - Communications Signals
J3 - Output Power

PROTECTION FEATURES

• LVPS/BC latches off in the event of input over voltage or phase loss
• LVPS/BC latches off if over temp is detected on any power semiconductor
• Output current limiting
• Over voltage, over current and over temp protection for IGBTs
• LVPS/BC opens a breaker to protect battery if a battery over temp is detected or if the battery will not take a charge
• If a fault is removed, the LVPS/BC can be reset via a front panel push-button

FRONT PANEL Displays and Status Indicators

Digital Voltmeter
Digital Ammeter
LED Normal Battery Voltage
LED Normal Input Voltage
LED Battery Over Temperature
LED LVPS/BC Failure
LED LVPS/BC Over Temperature
LED Low Battery Voltage
LED Over Current Latch
LED Phase Loss