Functional Descriptions; Voltage And Frequency; Alarm Inhibit - Deif Multi-line 2 Description Of Options

GPU, GPC, PPU
Voltage and frequency is set in % of nominal generator value. The delay settings are all of the
definite time type, meaning that a set point and time is selected.
If the function is e.g. overvoltage, then the timer will be activated, if the set point is exceeded. If
the voltage value goes below the set point value before the timer runs out, then the timer will be
stopped and reset.
Set point
When the timer runs out, the output is activated. The total delay will be the delay setting + the
reaction time.
Some of the alarms included in the option C1 can be inhibited in order to avoid nuisance alarms
during controlled conditions such as start/stop of the gen-set and breaker operations.
For general information about the inhibit function, please refer to the Designer's
Reference Handbook.
DEIF A/S

3. Functional descriptions

Voltage and frequency

Timer Timer Timer
start reset start

Alarm inhibit

Option C1, Generator add-on protection package
Timer setting
Alarm
Measured
value
Time
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