5.2.3 Synchronisation under switchboard control
If the controller is under switchboard control, the synchronisation must be done manually.
To get under switchboard control, the controller must receive an external signal. This is normally done using a switch on the
switchboard that is connected to one of the controller's digital inputs. That digital input is then assigned the Local > Mode >
Switchboard control function.
Switchboard control equipment
The following table lists the third party equipment (hardware not generally supplied by DEIF) that may be used for switchboard
control. The switchboard buttons are connected directly to the genset or breaker, and are not connected to the controller.
Table 5.1
Example of typical third party equipment used during switchboard control
Name Type Details
Switchboard control
selector
ON/OFF switch The operator uses this to switch the controller to switchboard control.
GOV up* Push-button
The operator sends a signal directly to the governor to increase the genset
speed.
GOV down* Push-button
The operator sends a signal directly to the governor to decrease the genset
speed.
AVR up* Push-button
The operator sends a signal directly to the AVR to increase the genset
excitation.
AVR down* Push-button
The operator sends a signal directly to the AVR to decrease the genset
excitation.
Breaker close Push-button The operator sends a signal directly to the breaker to close the breaker.
Breaker open Push-button The operator sends a signal directly to the breaker to open the breaker.
Synchroscope
For example, DEIF's
CSQ-3
The synchroscope shows the synchronisation across the breaker. The sync
check relay in the synchroscope prevents the breaker from closing when it is
not synchronised.
*These only apply to gensets. The AVR inputs are optional.
INFO
For stable operation during manual regulation under switchboard control, the governor and AVR must include the required
amount of droop.
Manual regulation during switchboard control using controller inputs
The switchboard manual regulation buttons can be connected to digital inputs on the controller, and configured with the following
functions:
• Regulators > GOV > Manual > Manual GOV increase
• Regulators > GOV > Manual > Manual GOV decrease
• Regulators > AVR > Manual > Manual AVR increase
• Regulators > AVR > Manual > Manual AVR decrease
During switchboard control, when the operator presses the buttons, the controller adjusts the governor and/or AVR output.
More information
See System principles, Control and modes, Switchboard control for more information.
DESIGNER'S HANDBOOK 4189340911K UK Page 141 of 521
To Next Page
Loading...
