Functions
2.6 Motor Protection
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
104
Logic
Motor starting protection may be switched on or off. In addition, motor starting protection may be blocked via a
binary input which will reset timers and pickup annunciations. The following figure illustrates the logic of motor
starting protection. A pickup does not create messages in the trip log buffer. Fault recording is not started until
a trip command has been issued. When the function drops out, all timers are reset. The annunciations disap-
pear and a trip log is terminated should it have been created.
Figure 2-31 Logic diagram of the Motor Starting Protection
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