Recording Function; Fault Recording - Toshiba GRL150-100 Series Instruction Manual

3.4 Recording Function

The GRL150 is provided with the following recording functions:

Fault recording

Event recording
Disturbance recording
These records are displayed on the LCD of the relay front panel or on the local or remote PC.
3.4.1 Fault Recording
Fault recording is started by a tripping command of the GRL150 and the following items are
recorded for one fault:
Date and time
Trip mode
Operating phase
Power system quantities
User configurable initiation
User can configure four fault record triggers (Signal No.:2624 to 2627) by PLC. Any of input
signals as shown in Appendix B is assigned to these fault record trigger signals.
Up to the 8 most-recent faults are stored as fault records. If a new fault occurs when 8 faults have
been stored, the record of the oldest fault is deleted and the record of the latest fault is then stored.
Date and time occurrence
This is the time at which a tripping command has been initiated. The time resolution is 1 ms using
the relay internal clock.
Trip mode
This shows the protection scheme that output the tripping command.
Operating phase
This is the phase to which an operating command is output.
Power system quantities
The following power system quantities in pre-faults and post-faults are recorded.
- Magnitude of phase current (I a , I b , I c )
- Magnitude of residual current (I e )(*)
- Magnitude of positive, negative and zero sequence currents (I
- The ratio of negative to positive sequence current (I
- Magnitude of phase current at remote terminal (I aR , I bR , I cR )
- Magnitude of phase differential current (I da , I db , I dc )
- Percentage of thermal capacity (THM%)
Note (*): The displayed power system quantity Ie depends on relay model. Ie is not displayed in
, I
1
/I )
2 1
⎯ ⎯
66
6 F 2 S 0 8 2 8
, I )
2 0