Toshiba GR200 Series - 10.2.15 Current transformer failure (CT fail); (i) Error level; (ii) Error message

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 1250 -
10.2.15 Current transformer failure (CT fail)
Detecting the failure in the CT is achieved by the operation of the CT failure detection function
(CTF†). Thus, the failure signal in the CTF 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 CTF function, see Chapter Relay application: CT
failure detection .
(i) Error level
Generally, the default error level has been set at level 3 (Minor error), but the user can program
the level using setting [CHK_CTF:LVl]; then, set On for the setting [CHK_CTF:Sw]. The
manufacturer sets ten (10) seconds to detect the failure; it is reset instantly when the failure
is cleared
(ii) Error message
When the function operates and detects error, an error message can be shown at the LED and
the LCD screen.
Table 10.2-31 Error messages provided by the supervisor in CHK_CTF
Message and level
Meaning of the information
CT fail
Detection of the failure in the CT
Error level
Minor error (Level 3)
Table 10.2-32 Detailed information in Hexadecimal in CHK_CTF
Display area
Meaning of the detailed information
N/A
(No information is displayed)