WEG VBWC Series, Installation,Operation And Maintenance Instruction

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26 | Vacuum Circuit Breaker
12 ELECTRICAL DIAGRAM
Ø:
Ex
te
rnal
te
rminal
s of
th
e VBW
52:
VBW vacuu
m
circui
t brea
ke
r
BA:
Openin
g
re
leas
e
BA
1:
Se
condar
y
Openin
g
Rele
as
e
BF
: Closin
g
re
leas
e
BS
: Und
er
vo
ltag
e
re
leas
e
52a:
Au
xiliar
y
co
ntact (N
O)
52
b:
Au
xiliar
y
con
tact
(N
C)
LS
2:
St
op
co
ntro
l of
th
e
mo
to
r
op
er
at
or
Opening release power supply
Openin
g re
leas
e
moni
to
ring
contac
t
Load
ed
spring
contac
t
Ty
pe
A
*
Au
xiliar
y
Contac
t
Secondar
y
openin
g re
leas
e
moni
to
ring
contac
t
Closing release power supply
BF
BS
BA
BA
1
Motor operator power supply
Figure 12.1: Wiring diagram