SAMPLE SPECIFICATIONS FOR MODEL A-51
The inverter to be furnished shall be La Marche Mfg. Co. Model A-51 or approved equal. A transistorized oscillator shall
maintain the frequency at 1% of 60 cycles with variations in load, input voltage, and temperature. The inverter shall
employ a ferroresoant, sine wave filter and shall maintain the output voltage within 3% from no load to full load (P.F.-1)
with DC input variations of 15%. The output waveshape shall be sine wave with less than 5% distortion. The overall
efficiency of the inverter shall be better than 65%. The inverter shall be capable of operating at a rated output continuously
at an ambient temperature of 50C (120°F) .
The inverter shall be convection cooled in a ventilated steel enclosure and painted a gray color. This inverter shall have:
Automatic current limiting.
Automatic regulation with load variations.
Automatic compensation for DC input changes.
Low voltage, overload, and short circuit protection.
Automatic regulation of frequency.
Fused DC input.
ON-OFF switch to operate solenoid. disconnecting
the inverter from the battery.
Reverse polarity protection.
9. Quartz oscillator.
WHEN ORDERING PLEASE SPECIFY
La Marche model number.
Number and type of battery cells.
Ampere hour capacity of batteries.
Type and capacity of charging equipment.
Type of mounting, wall or rack mount.
AC and DC Circuit Breakers
Low DC Voltage Relay
High DC Voltage Relay
DC Voltmeter and Ammeter
AC Voltmeter and Ammeter
10. Transfer Switch
11. Relay Rack Mounting
12. Automatic Load Demand Panel
13. Line Synchronization
14. Inverter/Line Phase Angle Meter
15. 50 Hz.
16. 120/240 Output