Liebert 1000kVA manual Electrical Specifications

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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