Siemens 7SJ85 - External Trip Initiation 3-Pole; Overview of Functions; Structure of the Function

External Trip Initiation 3-Pole
Overview of Functions
The External trip initiation function:
•
Processes any signals from external protection or supervision devices
•
Enables the integration of any signals from external protection equipment in the indication and tripping
processing, for example from transient ground-fault relays or Buchholz protection
•
Enables direct tripping of the circuit breaker in conjunction with busbar-protection applications
•
Enables direct tripping of the circuit breaker in the case of circuit-breaker failure at the other line end
Structure of the Function
The External trip initiation function contains one stage. You can instantiate the External trip initiation func-
tion in DIGSI 5 multiple times.
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Figure 6-283 Structure/Embedding of the Function
6.44
6.44.1
6.44.2
Protection and Automation Functions
6.44 External Trip Initiation 3-Pole
880 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017