Manual 37443A DSLC-2 - Digital Synchronizer and Load Control
© Woodward Page 75/226
Voltage Monitoring
voltage
monitoring
2 Phase - phase /
Phase - neutral
Phase -
phase
This configuration determines the monitored voltage type.
Phase – phase: Only the phase - phase voltages VL12, VL23 and
VL31 are monitored.
Phase – neutral: Only the phase - neutral voltages VL1N, VL2N
and VL3N are monitored.
The Voltage high alarm specifies if the high voltage limit alarm is
activated.
limit
2 0 to 150 % 110 % The Voltage high limit setting specifies the voltage high limit alarm
trip point. The input is related to the rated voltage input configura-
ble in Menu 5 (parameter 1766).
The Voltage low alarm specifies if the low voltage limit alarm is ac-
The Voltage low limit specifies the voltage low limit alarm trip
point. The input is related to the rated voltage input configurable in
The Voltage switch specifies if the voltage high and low limits will
activate the “High Limit” and “Low Limit” relays.
Enables or disables the voltage regulator bias output limit alarm.
The alarm voltage range limit will be activated if the limit of the
voltage bias output reaches 100 %.
3pos Controller Voltage
Enabled: The relay outputs “Voltage Raise” and “Voltage Lower”
are active. The three position controller will be used with a voltage
regulator that cannot accept the analog voltage bias output.
Disabled: Voltage raise and lower relay contacts are not active.
Isolated operation: The generator voltage is controlled in such a
manner that the measured voltage does not deviate from the con-
figured setpoint by more than the value configured in this parame-
ter without the controller issuing a voltage raise/lower signal to the
voltage regulator. This prevents unneeded wear on the voltage bi-
as output control or the raise/lower relay contacts.
Synchronization: Voltage matching - the generator voltage is
controlled in such a manner that the measured voltage does not
deviate from the monitored reference bus voltage by more than
the value configured in this parameter without the controller is-
suing a voltage raise/lower signal to the voltage regulator. The
value configured for this parameter must be less than the value
configured for the Voltage window for synchronization (parameter
4541).
This is the time the relay output will stay closed when providing a
voltage raise or lower command to the voltage regulator. The
shortest possible pulse time should be configured to limit over-
shoot of the desired voltage reference point.
The Gain factor influences the operating time of the relays. In-
creasing the Gain factor will increase the response to drive the
voltage within the tolerance for the mode it is in (voltage matching
or voltage control). If the gain is configured too high, the result is
excessive overshoot/undershoot of the desired value.
If the measured generator voltage is within the deadband range
(parameter 5650) and the configured Delay expand deadband
time (parameter 5654) expires, the deadband will be multiplied
with the factor configured here.
The measured generator voltage must be within the deadband
range for the time configured here in order to multiply the dead
band with the factor configured in parameter 5653.
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