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120 Specifications and Ratings
5.5 Electrical Specifications
RECTIFIER INPUT
Input Voltage: Standard voltages—208 VAC, 480 VAC, 600 VAC. Other voltagesavailable on
request. 3
-phase, 3-wire plus ground.
Voltage Range: +10%,
-15% (no battery discharge at -20%).
Frequency Range: 57 Hz to 63 Hz.
Subcycle Magnetization Inrush: Less than 3 times normal full load input current for UPS models without
optional input isolation transformer. Less than 8 times normal full load input
current for T-UPS models with optional input isolation transformer or 12-pulse
rectifier.
Input Current Walk-In: From 20% to 100% in 15 seconds.
Current Limit: Maximum of 125% normal full load input current.
Current Distortion Less than 30% THD typical at normal full load input current. Less than 7%
reflected THD typical at normal full load input current with optional input filter.
500 kVA to 750 kVA models with optional 12-pulse rectifier: Less than 9% 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
Input Voltage: Standard voltages—208Y/120 VAC, 480Y/277 VAC, 600Y/346 VAC. Other
voltages available on request. 3-phase, 4-wire plus ground or 3-phase, 3-wire
plus ground.
Optional voltages—208 VAC, 480 VAC, 600 VAC. Other optional voltages
available on request. 3-phase, 3-wire plus ground (ungrounded or corner
grounded delta).
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.