DSEGenset DSE8610, Operator'S Manual

Page: 95 / 118

Protections
95
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 user
configured message shows on the display.
kW OVERLOAD
The measured Total kW is above the setting of the kW overload
Electrical Trip alarm
EARTH FAULT
The measured Earth Current is above the setting of the Earth fault
alarm.
NEGATIVE PHASE
SEQUENCE 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 is disabled by user
configuration. In this case, Protections Disabled will appear on the
module display; The alarm text is 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