Communication
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UPS User’s Guide S Rev B www.powerware.com
On-Generator: An external signal that the input power is being supplied
by a g enerator. 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:
쑺 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.
쑺 Frequency Glitch Count. This p arameter increases the number of bad
frequency cycles before the unit transfers to battery power. This
allows the UPS to operate smoothly during generator instability
without transferring to battery.
쑺 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.
SeeFigure15onpage26andFigure21onpage31tomakethe
connection for all dedicated input signals.
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