Toshiba GR200 Series Instruction Manual page 507

Detecting erroneous differential current in the DIF (Id error)
9.2.23
Erroneous operations are monitored by the operation of DIF-IdSV element† in the current
differential function (DIF); the automatic supervision function can alarm its erroneous
operation with the notification from the DIF function.
†Note: The DIF function has the supervision feature itself; hence, the user can program
the criteria for the supervision using settings [DIF-IdSV] and [TDIF-IdSV]; then set
On for the scheme switch [DIF-IdSV-EN]. For more information about the DIF
supervision, see Chapter
Supervision of differential current
Error level
(i)
The default error level is set at level 3 (Minor error), but the user can program the level using
setting [CHK_ID:LVl]; set On for the setting [CHK_ID:Sw] for the supervision. The time for the
detection can be set using [TDIF-IdSV], which is set for 10 seconds as default. After the error is
cleared, it is reset instantly.
Error message
(ii)
When detecting an error, an error message will be shown on the LCD screen and an LED is lit.
Table 9.2-48 Error messages provided by the supervisor in CHK_ID_CBP
Message and level
Id error
Error level
Table 9.2-49 Detailed information in Hexadecimal in CHK_ID_CBP
Display
area
10000000:
01000000:
Top
00100000:
00010000:
row
00001000:
00000100:
Middle
(No information displayed)
row
Bottom
(No information displayed)
row
Relay application: Current differential protection:
Detection of the erroneous differential current
Minor error (Level 3)
Meaning of the detailed information
Left column
ZoneA
ZoneB
ZoneC
ZoneD
ZoneE
ZoneF
- 493 -
.
Meaning of the information
Right column
00000010:
00000001:
(No information displayed)
(No information displayed)
6F2S1931 (0.20)
Checkzone
ORed state in all zones
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)