Reference: A938
Index: B
Page 16
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Instruction Manual – NPS914 Alarm and Indication IED
I/O
• An object has Open and Close inputs which are used for indicating the status of the breaker on the
HMI and in SCADA. Status can be indicated by any of the following: digital inputs, logical inputs or
outputs.
• A withdrawable object has In and Out inputs. Status can be indicated by any of the following: digital
inputs, logical inputs or outputs.
• Both "Object Ready" and "Synchrocheck" have status inputs. If synchrocheck or object ready is
used these inputs need to be active for the relay to be able to give object closing command.
• Object Open and Close signals define which digital output is controlled.
Operation settings
• Breaker traverse time: How long gap there can be between open and close status change before
intermittent status is reported by the function.
• Max close and open pulse length: Defines the maximum length of open and close commands. If
status has changed before max pulse length has elapsed, the pulse is cut short.
• Control termination timeout: If status of the object does not change during this time, open or close
fail event is recorded.
• After the set delay, if the controlled object does not respond accordingly, the procedure is
terminated and a fail message is issued.
Control settings (Application)
• Object application close and open: Signal set to these points can be used to open and close the
object. Controlling the object through this point does not follow local/remote status of the relay.
Control settings (DI)
• Access level for Mimic control: determines the access level required to control Mimic (each level
has its own password). By default, the access level is set to "Configurator".
• You can use digital inputs to control the object locally or remotely. Remote controlling via the bus is
configured in the protocol level.
