[hand-ein-mit-we-wlk-010802, 1, en_US]
Figure 2-59 Manual closure with internal automatic reclosure
52 Circuit breaker
52TC Circuit-breaker trip coil
CBAux Auxiliary contact of the circuit breaker
If, however, external close commands are possible which are not supposed to activate the manual close func-
tion (e.g. external recloser), the binary input
>Manual Close
must be triggered by a separate contact of the
control switch (Figure 2-60).
If in that latter case a manual close 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 via parameter 1152
Man.Clos. Imp. (Figure 2-58).
[hand-ein-mit-ext-we-wlk-010802, 1, en_US]
Figure 2-60 Manual closing with external automatic reclosure device
52 Circuit breaker
52TC Circuit-breaker trip coil
CBAux Auxiliary contact of the circuit breaker
Besides the manual CLOSE detection, the device records any energization of the line via the integrated line
energization detection. This function processes a change-of-state of the measured quantities as well as the
position of the breaker auxiliary contacts. The current status of the circuit breaker is detected, as described in
the following section at “Detection of the Circuit-Breaker Position”. The criteria for the line energization detec-
tion change according to the local conditions of the measuring points and the setting of the parameter
address 1134 Line Closure (see Section 2.1.6 General Protection Data (Power System Data 2) at margin
heading “Circuit-Breaker Status”).
Functions
2.12 Circuit Breaker Test
SIPROTEC 4, 7SD80, Manual 143
E50417-G1100-C474-A2, Edition 02.2018
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