Manual 37365A GCP-30 Series Packages - Genset Control
© Woodward Page 137/179
Parameter 271
Delayed engine
monitoring 00s
Engine; delayed engine monitoring 1 to 99 s
A delay may be configured to prevent the GCP from monitoring for selected alarms
(e.g. oil pressure, generator underfrequency, etc.) for a specific time period after
the engine has reached the firing speed.
Parameter 272
Firing speed
reached f >00Hz
Engine; firing speed reached 5 to 70 Hz
Once the engine has achieved this configured firing speed, the starter is disengaged
(switched off) and the frequency controller is enabled.
Note
The GCP may be configured to monitor for firing speed via the MPU input or the
frequency of the generated voltage. If the MPU input has been enabled, the GCP is
able to monitor frequencies as low as 5Hz accurately. If the MPU input has not
been enabled, the GCP will monitor that firing speed has been achieved when the
monitored frequency has achieved 15Hz or greater depending upon the configured
value.
Parameter 273
Speed detected
V L1-L2 > 00.0%
Engine; speed detected from 5.0 to 25.0 %
When the monitored voltage surpasses the value configured for this parameter, the
GCP will recognize that engine has achieved firing speed.
The configured value for this parameter is a percentage of the voltage rating confi-
gured for the voltage inputs (Parameter 17). Speed will only be detected when the
m
onitored voltage between L1 and L2 (terminals 20/21) exceeds this configured
percentage of the rated system voltage. If the configured threshold value for this
parameter is to low, EMI induced voltages from other sources may cause the con-
trol to incorrectly detect speed and issue a nuisance fault condition resulting in a
shutdown alarm.
Note
Regardless of the value configured for this parameter, speed will only be detected if
the monitored voltage between L1 and L2 (terminals 20/21) is more than 5% of the
configured rated voltage of the generator potential transformer secondary (Para-
m
eter 10).
Attention
The GCP may fail to detect speed or frequency on applications without an MPU if
the threshold for this parameter is configured to high.
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