GE 889 - Page 535

CHAPTER 5: STATUS GENERATOR
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 5–5
Figure 5-5: Generator Status Logic Diagram
NOTE
NOTE:
The Generator breaker has to be configured as Breaker 1. If it is not configured as Breaker 1
or its status is unknown, the Generator Status shows as Unknown.
RUNNING HOURS
Range: 0 to 100,000 hrs in steps of 1
Default: 0 hrs
The Running Hours field shows accumulated generator running time in hours. Refer to
the Running Hours element description for more details.
FIELD BKR STATUS
Range: Unknown, Open, Close
Default: Unknown
The Field Breaker Status shows Open or Close if the FIeld Breaker Discrepancy element is
configured. Otherwise the status displays Unknown.
THERMAL CAPACITY USED
Range: 0 to 100 % in steps of 1 %
Default: 0 %
The Thermal Capacity Used value is continuously calculated in percentage and
irrespective of whether the Thermal Model element is enabled or not enabled. This value
is only displayed when the Thermal Model element is enabled.
ESTIMATED TRIP TIME ON OL
Range: Never, 0 to 65000 s in steps of 1 s
Default: Never
This value is available when the Thermal Overload element is enabled, and represents
the estimated time to trip (in seconds) from the thermal overload model assuming that
the generator current remains at its current level. By default the value is 'Never' which
indicates that the Thermal Overload element never operated.
894137A1.cdr
FLEXLOGIC OPERANDS
Gen Status Online
AND
FLEXLOGIC OPERANDS
BKR1 CLOSED
|V
AB
|
|V
BC
|
|V
CA
|
J - Slot Voltages
FLEXLOGIC OPERANDS
ANY TRIP
FLEXLOGIC OPERANDS
BKR1 OPENED
OR
|V
CA
| > 0.5 x VT
|V
BC
| > 0.5 x VT
|V
AB
| > 0.5 x VT
AND
FLEXLOGIC OPERANDS
Gen Status Tripped
FLEXLOGIC OPERANDS
Gen Status Offline
AND
AND
FLEXLOGIC OPERANDS
Gen Status
Unknown
OR
FLEXLOGIC OPERANDS
BKR1 Unknown State