Toshiba GR200 Series - (ii) Check relay activation; 2.3.3 CT circuit-failure detection (DIFGL-CTF)

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 47 -
Transformer module for AC analog input .
(ii) Check relay activation
For the operation of the check relay the user should set On for scheme switch [DIFGL-EFD-EN].
On the other hand, the user should set Off for scheme switch [DIFGLFS-EN] if the check relay
is not required for the operation of the DIFGL function.
2.3.3 CT circuit-failure detection (DIFGL-CTF)
The user can set the DIFGL function not to operate upon occurrence of the failure in the CT
circuit. As shown in Figure 2.3-3, the logic of DIFGL function can acquire a detection signal
“DIFL-CTF-DETECT” from the DIFL function so that the DIFGL function cannot operate
when the signal “DIFL-CTF-DETECT” enters. The user should set On for scheme switch
[DIFGL-CTFBlk] to acquire the detection signal. (For more information of the CT circuit-failure
detection, see section CT circuit-failure detection in DIFL function )