Specifications

1
1.0 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 converter, system battery, solid-state
inverter, automatic static bypass transfer circuit and integral maintenance bypass circuit.
2.0 SYSTEM DESCRIPTION
2.1 Components
The UPS shall be comprised of the major components listed below:
2.1.1 Insulated Gate Bipolar Transistor (IGBT) Converter 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 PWM IGBT Converter.
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).
j. Automatic UPS restart and load pick-up (after system battery depleted;
AC restored).
k. Programmable external customer contacts (A-Type) dry contacts.
l. Touch screen person-machine interface.
m. External DC Disconnect.
n. Remote and Local Emergency Power Off (EPO).
o. Static Bypass Disconnect.
p. Wall mounted or free standing DC cable landing cabinet