Processing Of The Circuit Breaker Position - Siemens siprotec 7SA6 User Manual

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6.20.2 Processing of the Circuit Breaker Position

C53000-G1176-C133-1

Figure 6-139 Manual closure with internal automatic reclosure

automatic reclosure

Figure 6-140 Manual closure with external automatic reclosure

Information regarding the circuit breaker position is required by various protection and

supplementary functions to ensure their optimal functionality. This is for example of

assistance for

− the echo function in comparison schemes with distance protection

(refer to Subsection 6.4.1.11)

− the echo function in the earth fault directional comparison pick-up

(refer to Subsection 6.6.1.5)

− weak infeed tripping (refer to Subsection 6.7.1)

− the high-current instantaneous tripping (6.10.1)

− the plausibility check before automatic reclosure (refer to Subsection 6.12.1)

− the circuit breaker failure protection (refer to Subsection 6.16.1)

− verification of the reset condition for the trip command (refer to Subsection 6.20.4)

− the circuit breaker test by means of the trip-close test cycle

(refer also to Subsection 6.20.5)

A circuit breaker position logic is incorporated in the device (Figure 6-141). Depending

on the type of auxiliary contact(s) provided by the circuit breaker and the method in

which these are connected to the device, there are several alternatives of

implementing this logic.

>Manual Close

AR CLOSE Cmd.

— circuit breaker

Close — circuit breaker close pulse

>Manual Close

— circuit breaker

Close — circuit breaker close pulse

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