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10.2.16 Current transformer failure (CT fail)
CT failure can be detected by CT failure detection function (CTF†).
†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_CTF:LVl]. Remember that the user needs to set On for setting [CHK_CTF:Sw]. The
manufacturer has determined ten (10) seconds for the detection. The CT fail will be reset
instantly when the failure is cleared
Error message
(ii)
When detecting an error, the error message will be shown on LCD screen. LED will be lit up.
Table 10.2-31 Error messages provided by the supervisor in CHK_CTF
Message and level
CT fail
Error level
Table 10.2-32 Detailed information in Hexadecimal in CHK_CTF
Display
area
Top
00000001: CT fail is existing
row
Middle
00000001: CTF DETECT
row
Bottom
00000001: EXTERNAL CTF
row
Relay application: CT failure detection
Detection of the failure at CT
Minor error (Level 3)
Meaning of the detailed information
Left column
- 817 -
Meaning of the information
00000001: CTF DET
00000001: CTF BLOCK
(No information is displayed)
6F2T0207 (0.01)
(→p. 227).
Right column
GRE200 (5,6)
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