Specifications

5.5Electrical Specifications

RECTIFIER INPUT

 

Standard voltages for 100 - 450kVA units: 208, 480 and 600VAC

Input Voltage

Standard voltages for 500 - 1000kVA units: 480 and 600VAC

 

Other voltages available on request. 3-phase, 3-wire plus ground.

Voltage Range

+10%, -15% (no battery discharge at -20%)

Frequency Range

57 Hz to 63 Hz

 

Less than 3 times normal full load input current for UPS models without optional

Subcycle Magnetization Inrush

input isolation transformer. Less than 8 times normal full load input current for

 

models with optional input isolation transformer and optional input filter

Input Current Walk-In

From 20% to 100% in 15-20 seconds

Current Limit

Maximum of 125% normal full load input current

 

Less than 30% reflected THD typical at normal full load input current. Less than 7%

 

reflected THD typical at normal full load input current with optional input filter

Current Distortion

500kVA to 750kVA models with optional 12-pulse rectifier: Less than 9% reflected

 

THD typical at normal full load input current. Less than 4% reflected THD typical at

 

normal full load input current with optional input filter

Power Factor

0.85 minimum lagging at full load

0.92 minimum lagging at full load with optional input filter

 

BYPASS INPUT

 

 

Standard voltages - 208/120 VAC, 480/277 VAC, 600/346 VAC. 3-phase, 4-wire

Input Voltage

plus ground or 3-phase, 3-wire plus ground. Other optional voltages available.

Optional voltages - 208 VAC, 480 VAC, 600 VAC. 3-phase, 3-wire plus ground

 

 

(ungrounded or corner grounded delta). Other optional voltages available.

Voltage Range

±5% for manually initiated bypass transfer

±10% for automatically initiated uninterrupted transfer

 

Frequency Range

59.5 Hz to 60.5 Hz

Voltage Transient

±4% for manually initiated bypass transfer

CRITICAL LOAD OUTPUT

 

 

Standard voltages - 208/120 VAC, 480/277 VAC, 600/346 VAC. Other optional

 

voltages available.

Output Voltage

SCC output: 3-phase, 3-wire plus ground or 3-phase, 4-wire plus ground

Module output to SCC: 3-phase, 4-wire plus ground (neutral required)

 

 

Optional voltages - 208 VAC, 480 VAC, 600 VAC. 3-phase, 3-wire plus ground

 

(ungrounded or corner grounded delta). Other optional voltages available.

Voltage Regulation

±0.5% for balanced load

±2% for unbalanced load

 

Voltage Adjustment Range

±5% manually

Line Drop Compensation Range

Up to +5% automatic load dependent

Frequency

595 Hz to 605 Hz

Slew Rate

0.01 to 1 Hz per second, adjustable

Phase Balancing

120° ±1° for balanced loads

120° ±3° for 50% unbalanced loads

 

Voltage Imbalance

 

20% Unbalanced Load

±1% from the arithmetic average of the 3 phases

50% Unbalanced Load

±2% from the arithmetic average of the 3 phases

Voltage Transient

 

20% Load Step

±4% RMS

50% Load Step

±4% RMS for 100-750kVA units; ±5% RMS for 1000kVA units

100% Load Step

±5% RMS for 100-750kVA units; ±8% RMS for 1000kVA units

Loss or Return of AC Input Power

±1% RMS

Manual Transfer of 100% Load

±4% RMS

Voltage Transient Recovery Time

To within 1% of steady state output voltage within 50 milliseconds

Voltage Harmonic Content

Maximum 5% RMS total, for any combination of linear and nonlinear loads

Maximum 3% RMS single, for linear loads

 

Module Overload Capacity

104% of full load rating continuously

at Full Output Voltage

125% of full load rating for 10 minutes

(System overload capacity depends on

150% of full load rating for 30 seconds

the configuration of on-line modules.)

(with ±2% voltage regulation)

 

Up to 300% of normal full load current subcycle; up to 500% of normal full load

Fault Clearing

current for up to 40 milliseconds with bypass available; up to 1000% of normal full

 

load current for up to 16 milliseconds with bypass available

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Image 117
Liebert 1000kVA manual Electrical Specifications