• Fully isolated AC output from battery input
• Ultra low quiescent current, low power ‘Power Saver Mode’ to conserve energy
• Battery type selector for 8 type of batteries and de-sulphation for completely drained batteries
• 10 ms transfer time from AC to battery for continuous load operation
• Remote enable
• 5 sec DC to AC transfer delay, improved protection for generator driven loads
• Thermally controlled variable speed fan for more efficient cooling
• Extensive protections against various harsh situations
• New functionality (Battery priority mode and Low battery recover) developed for renewable
energy systems
FEATURES
• 20A DC output power
• 12Vdc remote start
• 4 pins for KECO Deluxe Auto Eject remote interface
• Auto Generator Start
•
Battery Temperature Sensing for increased charging precision
• Manual 50Hz/60Hz output frequency switch for worldwide operation
• Maximum THD: 3% at nominal battery voltage
• Maximum 80% conversion efficiency
• Powerful 4-stage power factor corrected battery charger up to 55 Amps, settable from 0%-100%
• High surge output capability, 300% peak load for 20 seconds
OPERATION
7
I. INVERTER
:
A.Topology
The Auto Power Inverter Charge
r
is built according to the following topology.
Invert: Full Bridge Topology.
Charge: Isolated Boost Topology
When operating in invert mode, the direct current (DC) that enters the inverter from the
batteries is filtered by a large input capacitor and switched “On” and “Off” by the Metal
Oxide Silicon Field Effect Transistors (MOSFET) at a rate of 50 Hz or 60Hz, and directed
into the transformer which steps the voltage up to 230 or 120 volts. The unit has a 16bit,
4.9MHZ microprocessor to control the output voltage and frequency as the DC input volt-
age and/or output load varies.
Because of high efficiency MOSFETs and the heavy transformers, it outputs PURE SINE
WAVE AC with an average THD of 7% (min 3%, max 10% under full linear loads) depend
-
ing on load connected and battery voltage.
The peak invert efficiency of Inverter is 80%.
B.Overload Capacity
The Auto Power Inverter Charger
has different overload capacities, making it ideal to handle de
-
manding loads.
1.
For 110%<Load<125%(±10%), no audible alarm in 14 minutes, beeps 0.5s every 1s in the
15th minute, and Fault(Turn off) after the 15th minute.
2
. For 125%<Load<150%(±10%), beeps 0.5s every 1s and Fault(Turn off) after the 1 minute.
3
For 300% <Load>150%(±10%), beeps 0.5s every 1s and Fault(Turn off) after 20s.
