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Eaton 9170
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UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality
91
On-Generator: An external signal can indicate that the input power is
being supplied by a generator. Closure of this contact causes the UPS to
change the following parameters to preset values that are designed to
optimize performance during periods of generator instability:
S Phase Lock Window and Frequency Slew Rate. These parameters
increase the rate at which the UPS tracks the input line, which causes
fewer recognized line faults during generator instability.
S Frequency Glitch Count. This parameter increases the number of bad
frequency cycles before the unit transfers to battery power, allowing
the UPS to operate smoothly during generator instability without
transferring to battery.
S Maximum Delta and Line Delta. These parameters widen the
acceptable input voltage range, allowing the UPS to ignore any
transient voltage regulation problems a generator may experience
during unstable periods.
These parameters are also available to trained service personnel through
the Service Menu.
See Figure 14 on page 27 and Figure 21 on page 33 to make the
connection for all dedicated input signals.