Toshiba GR200 Series Instruction Manual page 1290

10.2.31 Supervision of circuit breaker contacts (CB1/CB2 fail)
Detecting the operation failure in the CB is achieved by the operation of the protection common
function (PROT_COMM†). Thus, the failure signal in the PROT_COMM is transferred to the
automatic supervision function and it is grouped into the error level together with other error
signals.
†Note: For more information about the PROT_COMM function, see Chapter
application: Protection common
arrangements, the detection is carried out for two CBs.
Error level
(i)
Generally, the default error level has been set at level 3 (Minor error), as default, but the user
can program the level using settings [CHK_CB1:LVl], etc.; then, set On for the setting
[CHK_CB1:Sw] or whatever required. The time to detect can be set using [TCBSV], which is
provided in the PROT_COMM function. If the error is cleared, it is reset instantly.
Error message
(ii)
When the function operates and detects error, an error message can be shown at the LED and
the LCD screen.
Table 10.2-63 Error messages provided by the supervisor in CHK_CB
Message and level
CB1 fail
CB2 fail
Error level
Table 10.2-64 Detailed information in Hexadecimal in CHK_CB
Display area
N/A
. When the IED operates for the 1.5CB
Meaning of the information
Detection of the failure in the CB
Detection of the failure of the other CB in the 1.5CB system
Minor error (Level 3)
Meaning of the detailed information
(No information is displayed)
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6F2S1914 (0.49)
Relay
GRL200 (Soft 033 & 037)