DSE DSE8661, Operator'S Manual, Page: 103 / 120

Protections
103
Display Reason
Mains Decoupling
High Frequency
If the module detects the mains frequency increase when in parallel
with the generator(s) more then the configure value. The LCD indicates
Mains Decoupling High Frequency .
Mains Decoupling
High Voltage
If the module detects the mains voltage increase when in parallel with
the generator(s) more then the configure value. The LCD indicates
Mains Decoupling High Voltage .
Mains Decoupling
Low Frequency
If the module detects the mains frequency decreases when in parallel
with the generator(s) below the configure value. The LCD indicates
Mains Decoupling Low Frequency.
Mains Decoupling
Low Voltage
If the module detects the mains voltage decreases when in parallel with
the generator(s) below the configure value. The LCD indicates
Mains
Decoupling Low Voltage .
Mains Decoupling ROCOF
If the module detects the mains frequency changing when in parallel
with the generator(s) more then the configure value in a time frame.
The LCD indicates
Mains Decoupling ROCOF.
Mains Decoupling
Vector Shift
If the module detects the mains phase angle changing when in parallel
with the generator(s) more then the configure value in a time frame.
The LCD indicates
Mains Decoupling Vector Shift.
Mains Reverse Power
If the module detects that the generator bus is exporting more than the
configured limit, the LCD indicates
Mains Reverse Power
Minimum Sets Not
Reached
On start up, If the number of available generators on the MSC link has
not achieved the
Minimum Number of Sets Not Reached value before
the end of the timer, the LCD indicates Minimum Number of Sets Not
Reached.
MSC Failure If the MSC link breaks, the LCD indicates MSC Failure
MSC Old Version Unit On
The Bus
If the module detects that there is one or more DSE controller
connected to the MSC link that are not compatible with the module (for
example earlier versions), the LCD indicates
MSC Old Version Unit On
The Bus.
MSC Too Few Sets
If the number of modules on the MSC link falls below the Minimum
Modules On Multiset Comms Link , the LCD indicates MSC Too Few
Sets.
Out Of Sync
If the module detects that the supplies are not in sync when the breaker
is closed. The LCD indicates
Out Of Sync.
Out Of Sync Bus
If the module detects that the generator bus supply is not sync when the
breaker is closed. The LCD indicates
Out Of Sync Bus.
Out of Sync Mains
If the module detects that the mains supply is not sync when the
breaker is closed. The LCD indicates
Out Of Sync Mains.
Mains Phase Rotation
If the module detects a mains phase rotation error, an electrical trip is
initiated is initiated. The LCD indicates Mains Phase Seq Wrong .
Priority Selection Error
If the DSE8661 detects that a DSE8680 shares the same priority
number, an electrical trip
is initiated. The LCD indicates Priority
Selection Error.