Power Electronics VS 65130 2, Руководство по аппаратному обеспечению и установке

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POWER ELECTRONICS
VS65 SERIES MV SOFT STARTER
PREVENTIVE MAINTENANCE
45
In
sp
ec
ti
o
n
s
it
e
Inspection
element
Inspection
Period
Inspection method Criterion
Instrument of
measurement
D
ai
ly
1
ye
ar
2
ye
ar
s
3
ye
ar
s
C
o
n
tr
o
l c
ir
cu
it
an
d
p
ro
te
ct
io
n
s
Operating
check
Is there any imbalance
between output voltage
phases?
o
Measure voltage between output
terminals U, V and W.
Balanced
voltage between
phases i.e. lower
than 8V
difference for
400V models.
Digital
multimeter /
RMS voltage
meter.
D
is
p
la
y
All
Is the displayed value
correct?
o
o
Visual check.
Check the reading instrument with
an external measurement.
Clean the screen.
Check the
specified values
and the control
values are
equal.
Voltmeter,
amperemeter.
M
o
to
r
Insulation
resistance
Megger check (between
terminals of output
circuit and ground
terminal)
o
Disconnect the cables U, V and W
and join them together. Check the
resistance between this join and
ground.
More than 5MΩ
Megger type
2500V
All
Is there any noise or
abnormal vibrations?
Has any unusual smell
been perceived?
o
Audible, sensory and visual check.
Check if damages have been
produced by overheating. No anomaly.