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1.1.1 Major Components
Rectifier Converts AC input voltage to DC voltage. The rectifier uses IGBT (Insulated
Gate Bipolar Transistor) power transistors and a Pulse Width Modulated (PWM)
technique to provide input power factor correction and to minimize any harmonic
reflected onto the input power lines.
Inverter Converts DC voltage from the rectifier or from the batteries into AC output voltage
to maintain the attached load. This module uses the IGBT technology to provide
digital power quality.
Static Switch Automatically supplies the attached load from the bypass source when the inverter
is off.
Battery System Stores energy for utilization by the inverter and attached load in the event that utility
AC power is lost or is of unacceptable quality.
1.1.2 Galaxy 3000 Micro and Standard Cabinets
The Galaxy 3000 UPS system is available in two different cabinet sizes,
the Micro cabinet and the Standard cabinet.
Dimensions for the cabinets
are:
◗ Micro cabinet: 48.6in (1234.4) H x 23.0in (584.2) W x 38.1in (967.7) D
◗ Standard cabinet: 62.5in (1587.5) H x 32.8in (833.12) W x 40.1in (1018.5) D
Both cabinets are designed to provide for top and bottom entry of the utility power feed. The Micro cabinet is
typically supplied assuming bottom entry only.
Operating internally on 208 VAC, the Galaxy 3000 UPS system can be purchased to accept 208 VAC, 220 VAC,
480 VAC, or 600 VAC utility feed with the use of an internal input transformer contained in a Standard cabinet. The
Micro cabinet was designed to provide all of the features of the Galaxy 3000 system in the smallest possible
enclosure. Without an auxiliary cabinet, the Galaxy 3000 system in a Micro cabinet provides only 208 VAC input
and 208 VAC output.
An output voltage of 208 VAC is standard with the Galaxy 3000 and does not require any additional cabinetry. If
output voltages of 240 VAC, 408 VAC or 600 VAC are required, an auxiliary cabinet is required for the output
transformer.
The complete list of additional cabinets that could be included with your Galaxy 3000 system are: External
Maintenance Bypass cabinet, extended battery cabinet, and distribution cabinets.
1.1.3 Preparation for Operation
Several items must be considered when preparing the Galaxy 3000 UPS system for operation.
First – The UPS cabinet and its auxiliary cabinets must be arranged in the required configuration
to insure that the
interconnection cables are located in the correct adjacent cabinets.
Second – The cabinets must be in a location that provides for proper air flow and heat rejection.
Third – The room in which the Galaxy 3000 UPS system is located must maintain environmental
conditions within
recommended tolerances
Forth – All electrical connections must utilize the top or bottom conduit entries provided.
The following sections discuss in more detail these items.
Galaxy 3000 10-30kVA
Introduction1 — 2
86-172010-00 C05