Manual 37278B GCP-30 Series - Genset Control
© Woodward Page 99/174
Generator Voltage Monitoring
The line-to-line (wye) voltage is monitored.
Function: "Generator voltage not within the permissible range" - If one or more phases of the generator voltage
exceeds the limit values set for overvoltage or undervoltage, the engine is shut down immediately (class F3
alarm) and an alarm message is displayed. The activation of generator undervoltage monitoring is delayed by
means of "Delayed engine monitoring" (Parameter 307) in order to enable generator start-up.
Parameter 201
Gen.voltage
monitoring ON
Generator voltage monitoring ON/OFF
ON ................ Monitoring of the generator voltage will be performed. The subse-
quent parameters of this function are displayed.
OFF .............. Monitoring is disabled, and the subsequent screens of this function
are not displayed.
Parameter 202
Gen.overvoltage
U > 000.0%
Generator overvoltage threshold value 020,0 to 150,0 %
L This value refers to the parameter "Rated volt. in system" (Parameter 19).
If this threshold value has been exceeded for at least the delay time (Para-
m
eter 203), the following alarm class is initiated.
Issuing of class F3 alarm
NOTE
The threshold value for generator overvoltage may not exceed 149 V [1] or 495 V [4] for delta connec-
tions, because higher voltages cannot be detected.
Parameter 203
Gen.overvoltage
delay 0.00s
Generator overvoltage delay 0.02 to 9.98 s
For the control unit to recognize a generator overvoltage fault condition, the thre-
shold value configured in Parameter 202 must be exceeded without interruption for
t
his period of time.
Parameter 204
Gen.undervoltage
U < 000.0%
Generator undervoltage threshold value 020,0 to 150,0 %
L This value refers to the parameter "Rated volt. in system" (Parameter 19).
If the current value has been fallen below this threshold value for the delay time
(Parameter 205), the following alarm class is initiated.
Issuing of class F3 alarm
Parameter 205
Gen.undervoltage
delay 0.00s
Generator undervoltage delay 0.02 to 9.98 s
For the control unit to recognize a generator undervoltage fault condition, the thre-
shold value configured in Parameter 204 must be exceeded without interruption for
t
his period of time.
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