Toshiba GR-200 Series Instruction Manual page 725

10.2.26 Supervision of circuit breaker contacts (CB fail)
Detecting the CB operation failure is achieved with the service of the protection common
function (PROT_COMM†). The failure signal of the PROT_COMM is transferred to the
automatic supervision function.
†Note: see Chapter
Error level
(i)
Error level has been set at level 3 (Minor error; default), but the user can change it with setting
[CHK_CB:LVl]. Remember that the user needs to set On for setting [CHK_CB:Sw]. The time
to detect can be set using [TCBSV], which is provided in PROT_COMM function. The error will
be reset instantly, if the error is solved.
Error message
(ii)
When detecting an error, the error message will be shown on LCD screen. LED will be lit up.
Table 10.2-51 Error messages provided by the supervisor in CHK_CB
Message and level
CB fail
Error level
Table 10.2-52 Detailed information in Hexadecimal in CHK_CB
Display
area
Top
00000001: CB fail is existing
row
Middle
00000001: CB-B_FAIL
row
Bottom
(No information is displayed)
row
Relay application: Protection common
Detection of the failure in the CB
Minor error (Level 3)
Meaning of the detailed information
Left column
- 706 -
(→p. 271).
Meaning of the information
00000001: CB-A_FAIL
00000001: CB-C_FAIL
(No information is displayed)
6F2T0200 (0.15)
Right column
GRE200 (1,2)