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Manuals
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Toshiba Manuals
Circuit breakers
VK Series
Instructions manual
Toshiba VK Series Instructions Manual page 40
Vacuum circuit breakers 5-15kv
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:
Instructions manual
(57 pages)
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Table 4
.
Check Points for
Inspection
( cont
.
)
z
H
Check Point
No
.
Check Item
Check Method
Criteria
What
to
do
Remarks
m
z
8
Barrier
(
Vacuum
Interrupter
Support
)
Contamination
,
discoloration
,
and damage .
Visual check
.
There should be no
dust and
foreign
matter .
Wipe with
a clean
cloth
.
>
Z
o
m
There should be no
cracks or
damages
.
Factory
service
required if
cracked or
damaged .
9
Measurement
When the insulation
resistance between
the main
circuit is
low
,
clean the surface
of the
vacuum
interrupter with a dry
cloth and then take
measurements
again
.
of
Measuring
location
Insulation
resistance
Megger
Insulation
Resistance
Main Circuit
-
Ground
500 Mohm
or
more
1000 V
Control
Circuit
-
Ground
2 Mohm or
more
500 V
500 Mohm or
more
Between
main circuit
1000 V
T
3
(
O
CD
CO
CJ
1
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44
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This manual is also suitable for:
Hvk series
Vk-6m32a
Hvk-6m32a
Vk-6m40a
Hvk-6m40a
Vk-8m40a
...
Show all
Hvk-8m40a
Vk-10m25a2
Hvk-10m25a2
Vk-10m40a
Hvk-10m40a
Vk-6m50
Vk-10m50
Vk-6p32a
Hvk-6p32a
Vk-6p40a
Hvk-6p40a
Vk-8p40a
Hvk-8p40a
Vk-10p25a2
Hvk-10p25a2
Vk-10p40a
Hvk-10p40a
Vk-6p50
Vk-10p50
Vk-8q40
Vk-10q40
Vk-6q50
Vk-10q50
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