1600XP Series Single Phase Uninterruptible Power Systems
Product Specifications – Rev 5.0 October 2013
3.6kVA – 22kVA
Page
2
of
9
E.
Microprocessor Controlled Logic and Touchpad Control Panel
F.
Input Circuit Breaker
G.
Battery System
H.
Output Isolation Transformer
3.3
Assembly
The UPS is delivered fully assembled and be fully functional.
4.0
System Theory, Modes of Operations and Main Components Functions
4.1
Theory
AC input from the utility system is converted into DC power. The stepped up DC power is then
converted to AC power by the inverter. The output voltage waveform of the inverter will be the
pulse voltage waveform modulated by the PWM control. The PWM-Modulated voltage
waveform is transformed into a sine voltage waveform by the inductive component of the
inverter inductor and by the capacitive component of the capacitor filter. The chopper, inverter,
and charger use IGBT’s that has a high switching speed.
4.2
Modes of Operation
The UPS operates as an on-line, fully automatic system in the following modes:
A. NORMAL - Incoming AC power is boosted using a chopper circuit, and converted into DC
power. The DC power is then used to charge the battery bank while at the same time providing
clean DC power to the inverter circuitry. The inverter converts DC power to a clean regulated
AC power which feeds the load.
B. BATTERY - Upon failure of commercial AC power, the UPS derives power from the battery
bank and continues feeding the load with clean regulated AC power. There is no interruption to
the critical load upon failure or restoration of commercial AC power.
C. RECHARGE - Upon restoration of the commercial AC source, the rectifier/chopper powers
the inverter while simultaneously recharging the battery bank. The UPS recharging process:
a)
A constant level of current is used to recharge the batteries. The process utilizes a
current-limit function to prevent overcharging batteries, thus extending the life of the
batteries.
b)
As the batteries reach the normal charge level, a constant-voltage control begins which
causes the battery recharge current to gradually decrease.
c)
Under normal operation, the UPS battery bank "floats" at the 2.25-2.27 volts per cell DC
level to stay fully charged and ready for the next discharge.
D. BYPASS MODE - Upon detection of an internal fault or output overload, the UPS
automatically switches from inverter power to an internal bypass via the static switch. Transfer
is within 4 milliseconds, causing no interruption to the critical load. While in bypass, the UPS
protects against spikes and common/normal mode noise by utilizing line filters and an output
isolation transformer. “Return from Bypass mode” is an automatic function, which does not
