Functions
6-282
7SA6 Manual
C53000-G1176-C156-2
The two binary inputs are periodically interrogated to determine their state. An interro-
gation takes place every 500 ms. Only once n = 3 sequential state interrogations de-
tect a failure, will the failure alarm be generated (refer to Figure 6-145). Due to this
measurement repetition the delay of the failure alarm is determined. A failure alarm
due to transient transition phases is thereby avoided. After removal of the failure in the
trip circuit, the alarm automatically resets after the same time.
Figure 6-145 Logic diagram of the trip circuit supervision with two binary inputs
Supervision Using
One Binary Input
The binary input is connected in parallel to the corresponding trip relay of the protec-
tion according to Figure 6-146. The circuit breaker auxiliary contact is bridged by
means of a high-ohmic shunt resistor R.
The control voltage of the circuit breaker should be at least twice the minimum voltage
drop across the binary input (U
C
> 2·U
BImin
). As at least 19 V are required for the bi-
nary input, the supervision function can be used if the trip control voltage is greater
than approximately 38 V.
An calculation example for the substitute resistance of R is shown in subsection 8.1.2,
margin “Trip Circuit Supervision”.
Table 6-12
Condition table of the binary inputs depending on the trip relay state and
CB state
No.
Trip
relay
Circuit
breaker
Auxiliary
contact 1
Auxiliary
contact 2
BI 1
BI 2
1
open
CLOSED
closed
open
H
L
2
open
OPEN
open
closed
H
H
3
closed
CLOSED
closed
open
L
L
4
closed
OPEN
open
closed
L
H
&
>TripC1Tr.Rel
>TripC1Br.Rel
T
T
T approx. 1 to 2 s
FAIL: Trip cir.
FNo 6855
FNo 6865
FNo 6854
Содержание siprotec 7SA6
Страница 2: ...Siemens Aktiengesellschaft Book No C53000 G1176 C156 2 ...
Страница 18: ...xviii 7SA6 Manual C53000 G1176 C156 2 ...
Страница 32: ...Introduction 1 14 7SA6 Manual C53000 G1176 C156 2 ...
Страница 82: ...Hardware and Connections 2 50 7SA6 Manual C53000 G1176 C156 2 ...
Страница 119: ...SIPROTEC 4 Devices 4 25 7SA6 Manual C53000 G1176 C156 2 Figure 4 20 CFC Logic example ...
Страница 190: ...Configuration 5 62 7SA6 Manual C53000 G1176 C156 2 ...
Страница 559: ...Control During Operation 7 45 7SA6 Manual C53000 G1176 C156 2 Figure 7 45 Circuit breaker trip test in DIGSI 4 ...
Страница 652: ...Installation and Commissioning 8 78 7SA6 Manual C53000 G1176 C156 2 ...
Страница 724: ...Technical Data 10 56 7SA6 Manual C53000 G1176 C156 ...
Страница 800: ...Appendix A 76 7SA6 Manual C53000 G1176 C156 2 ...
Страница 866: ...Appendix B 66 7SA6 Manual C53000 G1176 C156 2 ...