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DSE7200 / 7300 Series Operators Manual
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8.6 ELECTRICAL TRIPS
NOTE:- Shutdown and Electrical Trip alarms can be disabled by user configuration. See the section
entitled Protections Disabled elsewhere in this document.
Electrical trips are latching and stop the Generator but in a controlled manner. On initiation of the electrical trip
condition the module will de-energise the
‘Close Generator’ Output to remove the load from the generator. Once
this has occurred the module will start the Cooling timer and allow the engine to cool off-load before shutting down
the engine. The alarm must be accepted and cleared, and the fault removed to reset the module.
Example
Alarm 1/1
Generator Current High
Electrical Trip
Electrical trips are latching alarms and stop the Generator. Remove the fault then press Stop/Reset
to reset
the module.
Display Reason
GENERATOR HIGH CURRENT If a generator output in excess of the high current alarm point, a warning
alarm occurs. If this high current condition continues for an excess period,
then the alarm escalates to either a shutdown or electrical trip condition
(depending upon module configuration). For further details of the high
current alarm, please see High Current Shutdown / Electrical Trip Alarm.
AUXILIARY INPUTS If an auxiliary input configured as an electrical trip is active, the appropriate
message will be displayed as configured by the user.
kW OVERLOAD The measured Total kW is above the setting of the kW overload Electrical
Trip alarm
EARTH FAULT
(DSE7300 series V2.0 or above
only)
The measured Earth Current is above the setting of the Earth fault alarm.
NEGATIVE PHASE SEQUENCE
(DSE7000 series V2.0 or above
only) Indicates ‘out of balance’ current loading of the generator.
Sometimes also called Negative Sequence Current or Symmetry Fault
FUEL USAGE
Indicates the amount of fuel used is in excess of the Fuel Usage alarm
settings. This often indicates a fuel leak or potential fuel theft.
LOADING VOLTAGE NOT
REACHED Indicates that the generator voltage is not above the configured loading
voltage after the safety timer. The generator will shutdown.
LOADING FREQUENCY NOT
REACHED
Indicates that the generator frequency is not above the configured loading
frequency after the safety timer. The generator will shutdown.
PROTECTIONS DISABLED Shutdown and electrical trip alarms can be disabled by user configuration.
In this case, Protections Disabled will appear on the module display; The
alarm text will be displayed but the engine will continue to run. This is
‘logged’ by the module to allow DSE Technical Staff to check if the
protections have been disabled on the module at any time. This feature is
available from V4 onwards.
GENERATOR UNDER
FREQUENCY The generator output frequency has fallen below the preset level
GENERATOR UNDER VOLTAGE The generator output voltage has fallen below the preset level
UNDERSPEED The engine speed has fallen below the underspeed setting
POSITIVE VAr Positive VArs has exceeded the trip settings.
NEGATIVE VAr
Negative VArs has exceeded the trip settings.