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CRUCIAL POWER PRODUCTS N-Power UPS
Npower Specifications 1
CRUCIAL POWER PRODUCTS
N-Power UPS
GUIDE SPECIFICATIONS
30 - 130 kVA
Three-Phase Uninterruptible Power System

1.0 GENERAL
1.1 SUMMARY
This specification defines the electrical and mechanical characteristics and requirements for a continuous-
duty three-phase, solid-state, uninterruptible power system (UPS). The UPS shall provide high-quality
AC power for sensitive electronic equipment loads.
1.2 STANDARDS
The UPS shall be designed in accordance with the applicable sections of the current revision of the
following documents. Where a conflict arises between these documents and statements made herein, the
statements in this specification shall govern.

ANSI C62.41 (IEEE 587)

ASME

CSA 22.2, No. 107.1

FCC Part 15, Class A

ISO 9001

National Electrical Code (NFPA-70)

NEMA PE-1

OSHA

UL Standard 1778
The UPS shall be ETL listed per UL Standard 1778 Uninterruptible Power Supplies, and shall be CSA
Certified.
1.3 SYSTEM
DESCRIPTION
1.3.1 Design Requirements - UPS Module
A. Voltage. Input/output voltage specifications of the UPS shall be:
Rectifier Input: (_____) volts, three-phase, (_____)-wire-plus-ground.
Bypass Input (for dual-input modules): (_____) volts, three-phase, (_____)-wire-plus-ground.
Output: (_____) volts, three-phase, 4-wire-plus-ground.
B. Output Load Capacity. Specified output load capacity of the UPS shall be (______) kVA at 0.8
lagging power factor. Crucial Power Products


Npower Spec
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1.3.2 Design Requirements - Matching Battery Cabinet
A. Battery Cells: Sealed, lead-acid, valve-regulated.
B. Reserve Time: (_____) minutes at full load, 0.8 power factor, with ambient temperature between 20°
and 30°C.
C. Recharge Time: to 95% capacity within ten (10) times discharge time.
1.3.3 Modes of Operation
The UPS shall be designed to operate as an on-line, double-conversion, reverse-transfer system in the
following modes:
A. Normal - The critical AC load is continuously supplied by the UPS inverter. The rectifier/charger
derives power from a utility AC source and supplies DC power to the inverter while simultaneously float-
charging a power reserve battery.
B. Emergency - Upon failure of utility AC power, the critical AC load is supplied by the inverter, which
without any switching, obtains power from the battery. There shall be no interruption in power to the
critical load upon failure or restoration of the utility AC source.
C. Recharge - Upon restoration of utility AC power, after a utility AC power outage, the
rectifier/charger shall automatically restart, walk-in, and gradually assume the inverter and battery
recharge loads.
D. Bypass - If the UPS must be taken out of service for maintenance or repair, or should the inverter
overload capacity be exceeded, the static transfer switch shall perform a reverse transfer of the load
from the inverter to the bypass source with no interruption in power to the critical AC load.
1.3.4 Performance Requirements
1.3.4.1
AC Input to UPS
A. Voltage Configuration for Standard Units: three-phase, (_____)-wire plus ground.
B. Voltage Range: +10%, -20% of nominal.
C. Frequency: Nominal frequency +/-5%.
D. Power Factor: Up to 0.96 lagging at nominal input voltage and full rated UPS output load with
optional input filter. Minimum 0.80 lagging without optional input filter.
E. Inrush current: 800% of full load current maximum.
F. Current Limit: 115% of nominal AC input current maximum. 100% of nominal for optional
generator operation.
G. Input Current Walk-In: 15 seconds to full rated input current maximum. Field selectable 5 through
15 seconds.
H. Current Distortion: 10% reflected THD maximum at full load when fitted with optional input filter.
30% THD maximum at full load without optional input filter.
I. Surge Protection: Sustains input surges without damage per criteria listed in ANSI C62.41 Category
A and B.
1.3.4.2
AC Output, UPS Inverter
A. Voltage Configuration: three-phase, 4-wire plus ground Crucial Power Products


Npower Spec
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B. Voltage Regulation:
± 0.5% three-phase RMS average for a balanced three-phase load for the combined variation
effects of input voltage, connected load, battery voltage, ambient temperature, and load power
factor.
± 1.0% three-phase RMS average for a 100% unbalanced load for the combined variation effects
of input voltage, connected load, battery voltage, ambient temperature, and load power factor.
C. Frequency: Nominal frequency +/-0.1%.
D. Frequency Slew Rate: 5.0 Hertz per second maximum. Field selectable from 0.1 to 5.0 Hz per
second.
E. Phase Displacement:
± 0.5 degree for balanced load,
± 1.0 degrees for 100% unbalanced load.
F. Bypass Line Sync Range:
± 0.5 Hertz,
Field selectable
± 0.5 to 5.0 Hz.
G. Voltage Distortion:
1% total harmonic distortion (THD) for linear loads.
2.5% THD for 100% nonlinear loads (3:1 crest factor) without kVA/kW derating.
H. Load Power Factor Range: 1.0 to 0.7 lagging without derating.
I. Output Power Rating: Rated kVA at 0.8 lagging power factor.
J. Overload Capability:
125% for ten minutes (without bypass source).
150% for one minute (without bypass source).
200% for 10 cycles, pulse paralleling with the static switch.
K. Inverter Output Voltage Adjustment: +/-5% manual adjustment.
L. Voltage Transient Response:
100% load step


± 2.5%.
Loss or return of AC input power
± 1.0%.
Manual transfer of 100% load
± 3.0%.
M. Transient Recovery Time: to within 1% of output voltage within one cycle.
N. Voltage Unbalance: 100% unbalanced load
± 1%.
O. Fault Clearing: Sub-cycle current of at least 300%. Crucial Power Products


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1.4 ENVIRONMENTAL
CONDITIONS
The UPS shall be able to withstand the following environmental conditions without damage or
degradation of operating characteristics:
A. Operating Ambient Temperature
UPS Module: 32°F to 104
°F (0°C to 40°C).
Battery: 77 +/-9
°F (25 +/-5°C).
B. Storage/Transport Ambient Temperature
UPS Module: -4
°F to 158°F (-20°C to 70°C).
Battery: -4
°F to 92°F (-20°C to 33°C)
C. Relative Humidity
0 to 95%, non-condensing.
D. Altitude
Operating: to 6,600 ft. (2,000 meters) above Mean Sea Level. Derated for higher altitude applications.
Storage/Transport: to 40,000 ft. (12,200 meters) above Mean Sea Level.
E. Audible Noise
Noise generated by the UPS under any condition of normal operation shall not exceed 65 dBA measured
1 meter from surface of the UPS.
1.5 SUBMITTALS
1.5.1 Proposal
Submittals
Submittals with the proposal shall include:

System configuration with single-line diagrams.

Functional relationship of equipment including weights, dimensions, and heat dissipation.

Descriptions of equipment to be furnished, including deviations from these specifications.

Size and weight of shipping units to be handled by installing contractor.

Detailed layouts of customer power and control connections.

Detailed installation drawings including all terminal locations. Crucial Power Products


Npower Spec
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1.5.2 UPS Delivery Submittals
Submittals upon UPS delivery shall include a complete set of submittal drawings and one (1) instruction
manual that shall include a functional description of the equipment with block diagrams, safety
precautions, instructions, step-by-step operating procedures and routine maintenance guidelines, including
illustrations.
1.6 WARRANTY
1.6.1 UPS Module
The UPS manufacturer shall warrant the UPS module against defects in materials and workmanship for
12 months after initial start-up or 18 months after ship date, whichever period expires first.
1.6.2 Battery

The battery manufacturers standard warranty shall be passed through to the end user.
1.7 QUALITY
ASSURANCE
1.7.1 Manufacturer
Qualifications
A minimum of twenty years experience in the design, manufacture, and testing of solid-state UPS
systems is required. The system shall be designed and manufactured according to world class quality
standards. The manufacturer shall be ISO 9001 certified.
1.7.2 Factory
Testing
Before shipment, the manufacturer shall fully and completely test the system to assure compliance with
the specification.
2.0 PRODUCT
2.1 FABRICATION
2.1.1 Materials

All materials of the UPS shall be new, of current manufacture, high grade and free from all defects and
shall not have been in prior service except as required during factory testing.
The maximum working voltage, current, and di/dt of all solid-state power components and electronic
devices shall not exceed 75% of the ratings established by their manufacturer. The operating temperature
of solid-state component