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SPECIFICATIONS
Table 11. Electrical Input and Output
Nominal Frequency
Online: 60 Hz (FER) or 50 Hz (QFER) Output frequency tracks input line frequency up to
limit, which is adjustable from ±0.01 Hz to ±3.00 Hz. Inverter turns on if line frequency
exceeds the selected limit.
On inverter: 60 Hz (FER) or 50 Hz (QFER) ±0.03 Hz.
Regulation
±3% load regulation (under any line, load, or battery condition to within -8.3% and +5% of
nominal)
Voltage Waveform
Sine wave; <5% THD at rated linear loads, computer-grade power
Overload Capability
Online (nominal Vac in): 150% surge and 125% for 10 minutes.
On inverter (nominal Vdc in): 150% surge and 110% for 10 minutes.
Overload operation is not thermally limited. The FERRUPS Rack Mount UPS
microprocessor continuously monitors output VA and sounds an alarm before loss of
output voltage regulation occurs.
DC Input Protection
DC fuse and battery charger fuse
Output Protection
The ferroresonant transformer inherently limits current and provides overload protection.
The FERRUPS Rack Mount UPS has high AC and low AC output voltage alarms, as well as
an overload alarm. If the AC output voltage falls below the low AC output voltage alarm
setpoint, the UPS sounds an alarm after 5 seconds. If the AC output voltage falls below
the low AC output shutdown setpoint, the UPS sounds an alarm and shuts down.
Some models have output receptacles protected by fuses or circuit breakers.
Isolation, Including Output
Neutral to Ground Bonding
The FERRUPS Rack Mount UPS provides a true, separately-derived power source, as
defined by National Electrical Code Article 250-5d, with output neutral bonded to ground.
There is no direct connection between input and output, and less than 2 pF of effective
input to output capacitance.
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Eaton FERRUPS Rack Mount UPS (850 VA–7 kVA) User's Guide S 164201424 Rev 1
www.eaton.com/powerquality