Fuji Electric FVR-C11S-7EN Series - Insulation Test

8 Maintenance and Inspection 8-6
FVR-C11S-EN
8
[In the case of sin
g
le-phase input series]
Fi
g
ure 8-3-1 Dia
g
ram for connections of meters
8-4 Insulation
Test
As much as possible, do not test the inverter with a me
gg
er because an
insulation test was done at shippin
g
from the factor
y
. If a me
gg
er test
must be done, test as described below. If the test method is incorrect,
there is a possibilit
y
of dama
g
in
g
the product. Incorrect use of test spec-
ifications for the dielectric stren
g
th test ma
y
dama
g
e products like me
g
-
g
er test. If the dielectric stren
g
th test must be conducted, contact
y
our
local distributor or nearest Fuji’s sales office.
1) Me
gg
er test for the main circuit
1. Test with a 500V DC me
gg
er.
2. If the test volta
g
e is connected to the control circuit, remove all
connection wires to the control circuit.
3. Connect the main circuit terminals usin
g
common wires as shown
in Fi
g
ure 8-4-1
4. Execute a me
gg
er test onl
y
between the common wire connected
to the main circuit and the
g
round (terminal G).
5. If the me
gg
er indicates 5M
Ω
or more, it is normal.
(This is the value measured with an inverter onl
y
.)
Fi
g
ure 8-4-1 Me
gg
er Test
Inverter
M
V
V
W
A
W
V
V
A
V
V
U
A
U
L2/N
L1/L
N(-)
P(+)
—
+
11FM
—
U
V
W
+
A
R
V
R
W
R
W
W
W
U
V
3
Motor
Power supply
Inverter
G
G
WVUN(-)P(+)P(+)P1
L2/NL1/L
Inverter
Me
gg
er