Siemens 7SV512 - Page 32

Method of operation7SV512
V1
32
C53000---G1176---C91
&
T1---
1POLE
BFP
Trip L1
L1>
(acc.
Fig 4.4)
Aux L1
(acc.
Fig 4.6)
>
1
&
&
&
>
1
”1”
”1”
T---TRIP---BB
T2
T1+T2
T2---CB---
AUX
T2---
CURR.
BFP
Trip BB
BFP
CrossTrip
Init
L1
(acc.
Fig 4.11)
>
1
>
1
NO
YES
TRIP 1POLE
>
1
&
T1---
3POLE
BFP
Trip L123
L1>
L2>
L3>
(acc.
Fig 4.4)
Aux L123(acc.
Fig 4.6)
>
1
&
&
&
>
1
”1”
”1”
T2---CB---
AUX
T2---
CURR.
Init
L123
(acc.
Fig 4.11)
¡ ©
§¦
&
T1---
1POLE
BFP
Trip L2
L2>
(acc.
Fig 4.4)
Aux L2
(acc.
Fig 4.6)
>
1
&
&
&
>
1
1”
”1”
T2---CB---
AUX
T2---
CURR.
Init
L2
(acc.
Fig 4.11)
¢ £
&
T1---
1POLE
BFP
Trip L3
L3>
(acc.
Fig 4.4)
Aux L3
(acc.
Fig 4.6)
>
1
&
&
&
>
1
1”
”1”
T2---CB---
AUX
T2---
CURR.
Init
L3
(acc.
Fig 4.11)
¤ ¥
©
£
¥
§
¡
¢
¤
¦
BFP CB
defTrip
(see Sec---
tion 4.2.5)
Figure 4.13 Cooperation of the initiation conditions and delay timers
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