Siemens siprotec 7SA6 User Manual

Functions
6-2937SA6 Manual
C53000-G1176-C156-2
Figure 6-149 Manual closure with internal automatic reclosure
If in that latter case it a manual reclosure command can also be given by means of an
internal control command from the device, such a command must be combined with
the Manual Close function, either via the binary inputs and outputs or by means of the
user-defined logic (CFC).
Figure 6-150 Manual closure with external automatic reclosure
6.22.2 Processing of the Circuit Breaker Position
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 6.6.1.11)
− the echo function in the earth fault directional comparison pick-up
(refer to Subsection 6.8.1.5)
− weak infeed tripping (refer to Subsection 6.9.1)
− the high-current instantaneous tripping (6.12.1)
− the plausibility check before automatic reclosure (refer to Subsection 6.14.1)
− the circuit breaker failure protection (refer to Subsection 6.18.1)
− verification of the reset condition for the trip command (refer to Subsection 6.22.4)
L–
L+
>Manual Close
7SA6
Close
CB
Legend:
CB — circuit breaker
Close — circuit breaker close pulse
AR CLOSE Cmd.
FNo 356
FNo 2851
control
switch
Coil
L–
L+
>Manual Close
7SA6
Close
CB
Legend:
CB — circuit breaker
Close — circuit breaker close pulse
FNo 356
close
command
external
automatic reclosure
control
switch
Coil

Siemens siprotec 7SA6 Specifications

General

Brand	Siemens
Model	siprotec 7SA6
Category	Relays
Language	English