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Rev. A
4 Battery Charger
The flow chart of charger is described as follows: (Figure S-3-A & Figure S-3-B)
4.1 When UPS is connected to the utility, the control power (+ 5Vdc) will be established
and the CPU will start to work.
4.2 When CPU turns on Main Relay (RY01), the AC power flows into Main Transformer.
4.3 Charging current will be generated from the inverter coil of the Main Transformer.
4.4 A PWM I C 3843 is used to adjust the charging voltage and charging current. (Refer
to Figure S-3-A) The charging voltage can be set by changing the value of R87, R88,
R46 and R65. The charging current can be set by changing the value of R14.
Figure S- 3- A Charger Control Circuit
Summary of Contents for 1500 Series
Page 2: ...Page 1 of 28 Rev A UNINTERRUPTIBLE POWER SYSTEM SPECIFICATION EP 1000 1500 2000 Series ...
Page 9: ...Page 8 of 28 Rev A Figure S 2 Control Power Circuit CH1 C15 å GND Figure W 1 Cold Start ...
Page 11: ...Page 10 of 28 Rev A Figure S 3 B Charger Control Circuit ...
Page 16: ...Page 15 of 28 Rev A CH1 DS N CH2 Output Voltage 1 200V Figure W 3 Control logic 1 ...
Page 19: ...Page 18 of 28 Rev A Figure S 6 CPU Control Circuit ...
Page 23: ...Page 22 of 28 Rev A Figure S 8 B 6 LEDs Display Circuit ...
Page 28: ...Page 27 of 28 Rev A Figure W 7 Battery Mode Examination Flowchart ...
Page 29: ...Page 28 of 28 Rev A Figure W 8 Line Mode Examination Flowchart ...
