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1600EP Single Phase Uninterruptible Power Supply Systems
Guide Specifications
3.6, 6.0, 8.0, 10.0, 14.0, 18.0, 22 kVA
Page 1 of 8
1.0 Scope
This specification describes the requirements for an On-Line Uninterruptible Power
Supply (UPS). The UPS will supply a computer grade AC output sinewave which is
unaffected by the quality of the AC input. The input voltage is single phase and the
output voltage is single phase.
2.0 General Operation
Under normal operating conditions, the UPS's rectifier converts alternating current (AC
power) to direct current (DC power), which is required for the system's inverter and
battery charger. The charger supplies regulated DC power to keep the batteries
constantly charged. The inverter uses pulse width modulation (PWM) that fully utilizes
the characteristics of insulated-gate bipolar transistors (IGBT) to convert DC power to
regulated AC power. Therefore there is a constant supply of power. The batteries will
instantaneously supply the inverter DC power should an AC power line failure occur.
2.1 Performance Standards
The UPS shall be designed with the applicable sections of UL, CUL, and ISO 9001
14001. The UPS shall have UL and CUL listing.
3.0 General
3.1 Materials
All materials used are of new manufacture using the latest technology and should not
have been in prior service except for specified factory testing. IGBT's (insulated-gate
bipolar transistors) are used exclusively in inverter and chopper sections.
3.2 Components
All functioning components are solid state with no moving parts.
3.3 Installation
The installation of the UPS must comply with the UPS manufacturer's recommendations
that will be supplied before delivery of the UPS. Local electrical codes and the National
Electric Code must be complied with. All wiring must comply exactly with what is
specified.
3.4 Assembly
The UPS shall be delivered fully assembled and be fully functional.
4.0 System Theory and Operation
4.1 Theory
AC input from the utility system is converted into DC power chopper. 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 using
the 14 kHz switching frequency sinewave. 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,