Issue 1
14
Display
Reason
ECU DATA FAIL
The module is configured for CAN operation and does not detect data on
the engine Can datalink, the engine shuts down.
ECU SHUTDOWN
The engine ECU has detected a shutdown alarm and has informed the
DSE module of this situation. The exact error is also indicated on the
module’s display.
kW OVERLOAD
The measured Total kW is above the setting of the kW overload
shutdown alarm
NEGATIVE PHASE SEQUENCE
Indicates ‘out of balance’ current loading of the generator.
Sometimes also called Negative Sequence Current or Symmetry Fault
MAINTENANCE DUE
Indicates that the maintenance alarm has triggered. A visit is required by
the Generator service company. 500Hrs
GENERATOR HIGH CURRENT
A High Current condition has continued 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.
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.
POSITIVE VAr
Positive VArs has exceeded the trip settings.
NEGATIVE VAr
Negative VArs has exceeded the trip settings.
7.2.3 IDMT ALARM
If the
IDMT Alarm
is enabled, the controller begins following the IDMT ‘curve’ when the
trip
level is passed.
If the
Trip
is surpassed for an excess amount of time the
IDMT Alarm
triggers (
Shutdown
or
Electric trip
as selected
in
Action
).
High current shutdown
is a latching alarm and stops the Generator.
Remove the fault then press the
Stop/Reset Mode
button to reset the module.
High current electrical trip
is a latching alarm and stops the Generator.
Remove the fault then press the
Stop/Reset Mode
button to reset the module.
The higher the overload, the faster the trip. The speed of the trip is dependent upon the fixed formula:
T = t / ((IA / IT)
–
1) 2
Where: T is the tripping time in seconds
IA is the actual current of the most highly loaded line (L1 or L2 or L3)
IT is the delayed over-current trip point
t is the time multiplier setting and also represents the tripping time in seconds at twice full load (when IA / IT
= 2).
Factory settings for the
IDMT Alarm
when used on a brushless alternator are as follows (screen capture from the
DSE Configuration Suite PC software :
IT (Trip setting value)
t (time multiplier)
