1-8
1.3. Rectifier
The main function of a rectifier is to convert the AC input to DC power, supply it to
the inverter; the inverter then converts the DC power to AC power to the load. Our
UPS use the DC power to charge the battery as well, which is the most efficient way
of charging.
AC
INPUT
RECTIFIER
BREAKER
INDUCTOR
DC
OUTPUT
SCR
CAPACITOR
6-PULS E FULL CONTROL RECTIFIER
The rectifier of f r o m 20KVA to 80KVA UPS uses 6-pulse full controlled rectifier.
An inductor is added before the rectifier to improve the power factor, smooth the
current waveform and eliminate the harmonic current as well. The control circuit
regulates the DC bus within 1%. Soft walk-in circuitry (approximately 20sec.) and
current limit circuitry is used to prevent over current or instantaneous surge current.
Extra under-voltage and over-voltage protections are added to improve reliability and
to shutdown the rectifier in case of abnormal conditions. The DC bus is adjustable to
fit different types of battery. The power component use in rectifier is especially
selected to handle extreme high voltage and high current. The rectifier is designed to
operate under wide range of AC input, from 177 to 300VAC, to fit the poor power
conditions in some area.
Summary of Contents for DS-D33
Page 1: ...OPTI UPS User s Guide Durable Series Models DS D33 www opti ups com ...
Page 16: ...1 12 1 7 Dimension Drawings 20KVA 60KVA OUTLINE DRAWING ...
Page 17: ...1 13 20KVA 60KVA INTERIOR DRAWING ...
Page 18: ...1 14 80KVA 160KVA OUTLINE DRAWING ...
Page 19: ...1 15 80KVA 160KVA INTERIOR DRAWING ...
Page 20: ...1 16 200KVA 320KVA OUTLINE DRAWING ...
Page 21: ...1 17 200KVA 320KVA INTERIOR DRAWING ...
Page 22: ...1 18 INTER PCB DIAGRAM ...