Toshiba GR 200 Series, Instruction Manual

Page: 1126 / 1563

6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 1105 -
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
Relay
application: Protection common. When the IED operates for the 1.5CB
arrangements, the detection is carried out for two CBs.
(i)
Error level
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.
(ii)
Error message
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 Meaning of the information
CB1 fail Detection of the failure in the CB
CB2 fail Detection of the failure of the other CB in the 1.5CB system
Error level Minor error (Level 3)
Table 10.2-64 Detailed information in Hexadecimal in CHK_CB
Display area Meaning of the detailed information
N/A (No information is displayed)