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referenced publications shall be the latest date as of the date of the Contract Documents, unless
otherwise specified.
B. Institute of Electrical and Electronics Engineers, Inc. (IEEE):
1. ANSI/IEEE 519, "Guide for Harmonic Control and Reactive Compensation of Static Power
Converters" (copyrighted by IEEE, ANSI approved).
C. International Organization for Standardization (ISO):
1. ISO 9001, "Quality Management Systems - Requirements."
2. ISO 14001, “Environmental Management Systems - Requirements With Guidance for Use.”
D. Underwriters Laboratories, Inc. (UL):
1. UL 1778, "Standard for Uninterruptible Power Supply Equipment" (copyrighted by UL, ANSI
approved).
1.4 SYSTEM DESCRIPTION
A. Design Requirements:
1. The UPS shall be sized for [____] kVA and [____] kW load.
INSERT APPLICABLE VALUES IN SUBPARAGRAPHS ABOVE AND BELOW.
2. The UPS battery shall be sized for [____] kW at a power factor of [____] for [____] minutes.
B. System Characteristics:
1. System Capacity: The system shall be rated in the following sizes:
a. 10 kVA/8 kW.
b. 15 kVA/12 kW.
c. 20 kVA/16 kW.
d. 30 kVA/24 kW.
2. Input:
a. AC Input Nominal Voltage: 208 volts, three-phase, 4 wires plus ground, 60 hertz.
b. AC Input Voltage Window: +15 percent, -20 percent of nominal (while providing nominal
charging to the battery system).
c. Short Circuit Withstand Rating: 30,000 symmetrical amperes.
d. Maximum Frequency Range: 40 to 70 hertz.
e. Input Power Factor:
1) 0.98 for loads greater than 50 percent.
2) 0.95 for loads greater than 15 percent.
f. Input Current Distortion With No Additional Filters: Less than 5 percent at 100 percent
load.
g. Soft-Start: Shall be linear from 0 percent to 100 percent input current and shall not exhibit
inrush. This shall take place over a 15 second time period when transferring from battery
operation to mains operation.
3. UPS Output:
a. AC Output Nominal Output: 208/120 volts, three-phase, 4 wires plus ground, 60 hertz.
b. AC Output Voltage Regulation: ±1 percent for 100 percent linear or non-linear load.
c. Voltage Transient Response: ±5 percent maximum for 100 percent linear load step.
d. Voltage Transient Recovery: Within less than 60 milliseconds.
e. Output Voltage Harmonic Distortion:
1) Less than 2 percent THD maximum and 1 percent single harmonic for a 100 percent
linear load.
2) Less than 5 percent THD maximum for a 100 percent non-linear load.
f. Phase Angle Displacement:
1) 120 degrees ±0.1 degree for balanced load.
2) 120 degrees ±0.1 degree for 50 percent imbalanced load.
3) 120 degrees ±0.3 degrees for 100 percent imbalanced load.
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