Siemens 7SC80 Manual page 239

[7sc80-spg-supervision-131106, 1, en_US]
Figure 2-74
Current Transformer Monitoring
The current transformer monitoring function is only active if parameter 5520 60CTS is set to ON. If the param-
eter is set to OFF, the function is deactivated. The function can be blocked via the binary input indication 2532
>BLOCK 60CTS .
The failure of a current transformer is detected if the current of the negative sequence system Ι2 exceed the
threshold value 5522 60CTS I2 and at the same time, the voltage of the negative sequence system V2 falls
below the threshold value 5521 60CTS V2 for a period longer than 5523 60CTS T-Delay. If all conditions
apply, the indication 2533
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
Voltage transformer monitoring
60CTS Alarm is issued.
Functions
2.12 Monitoring Functions
239