Toshiba VK-6M32A Installation Operation & Maintenance page 45

Vk series: hvk series. vacuum circuit breakers 5-15kv
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l/av
31
2012
9:
22Al\/
ll0,
1530
P.46
MAINTENANCE
Page
43
Table 5. T
GuidelinBs (cont,
SYMPTOM
SOURCE
OF
TROUBLE
PROBLEM
SOLUTION
REF.
FIG.
Doss not
trip at
sll
(when
a
tripping signal
is
suppliadl
(cont)
Control
circuit
(cont)
Trip coil (burned, armature
ddmaged. or galladl
Replec6
Fig. 55
Fig.
6O-
Fig. 64
Terminal and connector
(poor
contact or
burned)
Beplaca
Thare is
a
tripping
sound
but it actually
did not trip
Mechanism
Link (gsll6dl
t
Fis. 39
Unclgslrably
trip
(without
a
tripping
signal)
Mschaniem
Trip catch (damagodl
*
Fig. 39
Control
ckcuit
Shon circuit of the
tripping circuit and the
power supply oitcuit.
ldentify
and
correct
Fig.
3tl-
Fig. 37
*
ltem
Requires Factory SsrvicB
- Consult Toshiba lnternational Corporation

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