Specifications

1
1. SCOPE
1.1. The System
This specification describes an on-line, three phase, solid-state, uninterruptible
power system, hereafter known as the UPS. The UPS shall operate utilizing the
existing power distribution system to provide a high quality, reserve source of
power to electronic equipment loads. The system shall consist of a rectifier, system
battery, solid-state inverter, automatic static bypass transfer circuit and integral
maintenance bypass circuit.
2. SYSTEM DESCRIPTION
2.1. Components
The UPS shall be comprised of the major components listed below:
2.1.1. Diode Bridge + IGBT DC/DC Rectifier in Rectifier Section.
2.1.2. Insulated Gate Bipolar Transistor (IGBT) Inverter Section.
2.1.3. Digital Signal Processor (DSP) using Pulse Width Modulation (PWM) for
Direct Digital Control (DDC) of all UPS control and monitoring functions.
2.1.4. Static bypass switch sized to provide fault clearing.
2.1.5. Standard features:
a. Transistorized DC/DC rectifier in Rectifier.
b. Transistorized PWM IGBT Inverter.
c. Inverter output isolation transformer.
d. DSP based fault memory and diagnostics.
e. DSP based menu controlled operation.
f. Active mitigation of reflected input harmonics (no passive filters).
g. Active control of output voltage distortion (no passive filters).
h. Automatic input current walk-in.
i. Remote operation (Start/Stop of Inverter).