Zone Selective Interlocking
5.2 Examples
3WL/3VL circuit breakers with communication capability - PROFIBUS
110
System Manual, 03/2011, A5E01051353-02
5.2
Examples
5.2.1
Function example
E
D
*
UD
G
LQ
JO
H
YH
O
*
UD
G
LQ
JO
H
YH
O
*
UD
G
LQ
JO
H
YH
O
WJ PV
WVG PV
:/
6(17521
4
4
6(17521
:/
WVG PV
WJ PV
4
6(17521
:/
WVG PV
WJ PV
=6,,1
ನ
ನ
ನ
=6,287
=6,287
7,(%5
7,(%5
=6,,1
=6,,1
ನ
ನ
ನ
=6,287
=6,287
7,(%5
7,(%5
=6,,1
=6,,1
ನ
ನ
ನ
=6,287
=6,287
7,(%5
7,(%5
=6,,1
Example from the perspective of the circuit breaker (Q2). The operational principle of the ZSI
is explained using the following graphic.