Manual 37259C
SPM-D11 - Synchronizing Unit
Page 64/79
© Woodward
Generator Voltage Monitoring
The line voltages V
L1
/V
L2
of the generator are monitored to ensure they do not exceed or fall below the threshold
values. The watchdog assigned to this relay is at terminals 41/42. The relay contact is a N.O. contact. When op-
erating in normal operations the relay is continuously energized. If the monitored values leave the configured
range, the relay will de-energize, the contact will open, and the message "Gen. overvoltage" or. "Gen. undervolt-
age" will be displayed. If the fault conditions exist for less than 1 second, the relay returns to normal operations.
The fault message on the display may be cleared automatically or by pressing the "Clear" button (see chapter
Auto Acknowledge Messages at page 64).
Gen.voltage-
Monitoring ON
Generator voltage monitoring
ON / OFF
ON
................The generator voltage monitoring is enabled. The generator voltage
is monitored with regard to overvoltage and undervoltage. The
following screens of this function are displayed.
OFF
..............No overvoltage or undervoltage monitoring is performed and the fol-
lowing screens of this function are not displayed.
Gen.overvoltage
U > 000V
Threshold value: Gen. overvoltage
[1] 20 to 150 V; [4] 20 to 520 V
If the value of the generator voltage exceeds the value set here, an overvoltage
alarm is issued.
Gen.overvoltage
Delay time=0.00s
Generator overvoltage threshold delay
0.04 to 9.98 s
In order to initiate an overvoltage alarm, the measured voltage must exceed and
remain above the configured threshold without interruption for at least the time
specified in this screen.
Gen.undervoltage
U < 000V
Threshold value: Gen. undervoltage
[1] 20 to 150 V; [4] 20 to 520 V
If the value of the generator voltage falls below the value set here, an undervoltage
alarm is issued.
Gen.undervoltage
Delay time=0.00s
Generator undervoltage threshold delay
0,04 to 9,98 s
In order to initiate an undervoltage alarm, the measured voltage must fall below
and remain below the configured threshold without interruption for at least the time
specified in this screen.
Auto Acknowledge Messages
Auto-acknowledge
messages ON
Messages auto acknowledgment
EIN/AUS
ON
................When fault conditions are no longer detected and the clear message
delay time has expired, the corresponding message is automatically
deleted.
OFF
..............When fault conditions are no longer detected and the corresponding
message continues to be displayed. Pressing the "Clear" button for at
least 3 seconds will clear the fault message. The following screen is
not displayed.
Acknowledge
Message aft. 00s
Clear messages delay
1 to 99 s
This screen only appears if the screen "Messages auto-acknowledgement" is set to
ON. Clearing the messages occurs after the specified time.