DSE 335 - 5 PROTECTIONS; 5.3 ELECTRICAL TRIPS

Protections
Page 75 of 90 057-233 ISSUE: 1
Display
Reason
PLC Functions If a PLC Function has been configured as a warning the appropriate
LCD message is displayed and the COMMON ALARM LED illuminates.
S1 Breaker Auxiliary Fail
Indicates that the
S1 Closed Auxiliary
input has not activated along with
the Close S1 Output or Open S1 Output, or the input has activated
when the output was not energised.
S1 Failure Unlatched The module has detected that S1 has failed for either an under/over
voltage/frequency condition. The unlatched alarm is automatically
cleared upon S1 returning to an available state.
S1 Phase Rotation The module has detected a wrong phase sequence for S1.
S2 Breaker Auxiliary Fail
Indicates that the
S
2
Closed Auxiliary
input has not activated along with
the Close S2 Output or Open S2 Output, or the input has activated
when the output was not energised.
S2 Failure Unlatched The module has detected that S2 has failed for either an under/over
voltage/frequency condition. The unlatched alarm is automatically
cleared upon S2 returning to an available state.
S2 Phase Rotation The module has detected a wrong phase sequence for S2.
5.3 ELECTRICAL TRIPS
Electrical trips are latching unload and stop S2 (if configured as a generator) but in a controlled
manner. On initiation of the electrical trip condition the module de-energises the ‘Close S2 Output’ to
remove the load from S2. Once this has occurred the module starts the Cooling timer and allow the
generator to cool down and shut off. The alarm must be accepted and cleared, and the fault removed
to reset the module.
Example
1/2 Alarm
Digital Input A
Latched
Electrical Trip
Electrical trips are latching alarms and unload and stop S2 (if configured as a generator). To clear
these alarms the STOP button is pressed
Display
Reason
Auxiliary Inputs If an auxiliary input has been configured as an electrical trip, the
appropriate LCD message is displayed and the COMMON ALARM LED
illuminates.
Expansion Inputs If an expansion input has been configured as an electrical trip, the
appropriate LCD message is displayed and the COMMON ALARM LED
illuminates.
PLC Functions If a PLC Function has been configured as an electrical trip, the
appropriate LCD message is displayed and the COMMON ALARM LED
illuminates.
S1 Breaker Auxiliary Fail
Indicates that the
S1
Closed Auxiliary
input has not activated along with
the Close S1 Output or Open S1 Output, or the input has activated
when the output was not energised.
S1 Phase Rotation The module has detected a wrong phase sequence for S1.
S2 Failure Unlatched The module has detected that S2 has failed for either an under/over
voltage/frequency condition. The unlatched alarm is automatically
cleared upon S2 returning to an available state.
S2 Phase Rotation The module has detected a wrong phase sequence for S2.