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8. KEYBOARD AND DISPLAY
8.2. SETTINGS GROUP (SET KEY)
This group allows to see and modify the DBF settings. It is accessed by pressing the SET key when the DBF is in steady state. When the SET key is pressed the following message appears on the screen:
VIEW SETTINGS
PROTECTION
When the UP/DOWN arrows are pressed the message changes to:
MODIFY SETTINGS
PROTECTION
And the last UP/DOWN action gives:
MODIFY COUNTERS
PROTECTION
For the above windows, the menu tree is shown in the following tables. Note that to go down a level in the tree the ENT key must be pressed, and the CLR key to go up
Level 1 | Level 2 |
GENERAL SETTINGS
| BREAKER SETTINGS |
| ACTIVE |
| TABLE SET |
VIEW PROTECTION SETTINGS | OSCILLOS MASK |
Level 3
RELAY STATUS IDENTIFICAT FREQUENCY PHASE CT RATIO GROUND CT RATIO
BREAKER NUMBER
KI2t OP. MODE
KI2t INT TIME
KI2t LIMIT
ACTIVE TABLE
PREFAULT CYCLES PICKUP
1st STAGE TRIP
2nd STAGE TRIP
INTERNAL ARC 50BF A TRIP 50BF B TRIP 50BF C TRIP 50BF 3P TRIP EXTERNAL TRIGGER COMM. TRIGGER
50BF B INIT
50BF C INIT
Level 4
In/Out of service
20characters
50– 60 Hz
4digits
Fixed / Measuring 0.03 - 0.25 s
1– 999999 kA2s
1
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
ENABLE/DISABLE
DBF Breaker Failure Protection | 43 |