Microprocessor Controlled SCR Technology

Output :
24,48,130, 260 VDC
6-500 Amps

Single Phase:120/208/220/240/480/600 VAC
Three Phase: 208/240/480/600 VAC

Process Control
Oil Exploration
Generators, Compressors and Engine Starting

The La Marche Model A77 Series Battery Charger is engineered for the demanding requirements of Switchgear, Process Control, Oil Exploration and other DC power applications. Powered by Microprocessor Controlled SCR technology, the A77 Series Battery Charger / Battery Eliminator has ±0.25% DC voltage regulation from no load to full load over the specified input voltage, frequency and ambient temperature ranges.

 • Reliably engineered for high – demanding DC power applications
 • Available in DC outputs 24, 48, 130, and 260VDC with currents 6-500Amps
 • Powered by Microprocessor Controlled SCR
 • Features an easy to read LCD display and LED based alarms indicators
 • Supports DNP3, Modbus, IEC 61850 and SNMP3 which enables a user-friendly web browser-based configuration interface
 • Designed to meet NEMA PE5 and UL 1012 safety standards

Please contact our sales team for special input-output configurations

User Manuals
AC InputSingle Phase: 120, 208, 240, 480 or 600 VAC
Three Phase: 208, 240, 480 or 600 VAC
DC Output24, 48, 130, 260 VDC
6 to 500 amps
EfficiencySingle Phase > 85%
Three Phase > 90%
DC Voltage Regulation Steady State± 0.25% of setting from no load to full load over the specified input voltage, frequency and ambient temperature ranges
Data Logging77 Battery Charger is equipped with data logging capability on an internal Micro-SD Card. It logs and stores data of Event-Driven and Time-Interval-Driven Events. The charger's data-log file does not need proprietary software to examine the data; it could be viewed and easily formatted with many popular spreadsheet programs
PROTECTIONCurrent Walk-in
Current Limit
AC Breaker
DC Breaker
Operating Temperature0 to 50°C (32 to 122°F)
Storage Temperature-40 to 85°C (-40 to 185°F)
Relative Humidity0 to 95% (non-condensing)
CoolingConvection Cooled
UL/CUL 1012
EN 55011
FCC Part 15
IEEE / ANSI C37. 90.1
IEC 60255-22-3
IEC 60950-1
IEC 61000-4
IEC 61000-6-4
IEC 61000-6-2
Alarms10ZElectrolyte Level HUB, Alarm Interface & Sensor
19UAdjustable Ground Detection Sensitivity
46RDiscrete Alarm Relays
57DHydrogen Det. HUB, Alarm Interface & Sensor
57HHydrogen Det. HUB, Alarm Interface
Breakers and Protection102Blocking Diode
217Reverse Polarity Protection & LED
01CAC Breaker 2 pole High Int 65KAIC @ 240 VAC, 25KAIC @ 480VAC, 18KAIC @ 600VAC
01DAC Breaker 2 pole High Int 100KAIC @ 240 VAC, 65KAIC @ 480VAC, 25KAIC @ 600VAC
01FAC Breaker 3 pole High Int 65KAIC@ 240 VAC, 25KAIC @ 480VAC, 18KAIC @ 600VAC
01GAC Breaker 3 pole High Int 100KAIC@ 240 VAC, 65KAIC @ 480VAC, 25KAIC @ 600VAC
11LLightning Arrestor
19TAC Breaker Trip on HVSD
Communications21JIEC 61850 Ethernet
21PDNP3 Communications RS232/RS485/Ethernet
21QModbus Communications RS232/RS485/Ethernet
21SModbus RTU Serial Data Port RS232/RS485
21XSNMP & Web Browser (Ethernet)
Controls182Ventilation Fan Interlock
11WExternal Temperature Probe 24 ft. Length
11YExternal Temperature Probe 100 ft. Length
20QEqualize Fan Control Relay
Input Filtering17B12 Pulse Rectification, 5% THD
Metering19VAC Voltage & Current Metering (1%)
06GZero Center Ammeter with Battery & Load Terminals
Miscellaneous09CID Tags - White Text on Black Background
09VID Tags - Black Text on White Background
11F30mV Filtering (For 130V Units and Higher) 30mV Filtering Standard On 24V and 48V Units
11F30mV Filtering (For 130V Units) 30mV Filtering Standard On 24V and 48V Units
38DCopper Ground Bus Bar
Standards538IBC Certification Label
56ECompliance to IEC 62477-1:2012 and IEC 61204-7:2016
Wire Markers, Documentation & Special Wiring09WHeat Shrink Wire Markers with Electrical Schematic