Siemens 7SJ85 - Standard Release Procedure

Standard Release Procedure
Logic
[lohlore3-160611-01.tif, 2, en_US]
Figure 6-87
Logic Diagram of Instantaneous High-Current Tripping with Standard Release Method
Activation
Using the Activation parameter, you set the conditions under which the stage is released.
•
on CB closure
With this procedure, the stage is released only if the circuit breaker is about to be closed (the CB is open) or if
the circuit breaker is being closed or if the binary input signal
>release is active. The way signals are gener-
ated Rel. by CB switch on is described in section 5.7.8 Circuit-Breaker Position Recognition for Protec-
tion-Related Auxiliary Functions.
•
always active
The stage is always released and is thus independent of closing of the circuit breaker switch and of the binary
input signal >release .
•
only with binary signal
6.9.3
Protection and Automation Functions
6.9 Instantaneous High-Current Tripping
494 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017