Power Electronics SD700SP Series, Руководство по аппаратному обеспечению и установке

Страница: 57 / 61

POWER ELECTRONICS SD700SP
MAINTENANCE
55
EN
Note:
Long life of the main components above indicated are based on a continuous operation for the stipulated load.
These conditions can change according to the environment conditions.
In
sp
ec
tio
n
si
te
Inspection
element
Inspection
Period
Inspection method Criterion
Instrument of
Measurement
M
on
th
ly
1
ye
ar
2
ye
ar
s
M
ai
n
ci
rc
ui
t
Conductor/
Cable
Is the conductor
corroded?
Is the sheathing of the
cable damaged?
o
o
Visual check. No anomaly.
Terminal Is any damage visible? o Visual check. No anomaly.
IGBT's module
Diodes module
and Rectifier
Check the resistance
value between each one
of the terminals o
Disconnect the cables of the
inverter and measure the
resistance value between:
L1, L2, L3,
 VDC+, VDC-
and
U, V, W

VDC+, VDC-
with a tester > 10k

Digital
multimeter.
Analogue tester.
M
ai
n
ci
rc
ui
t
Correct capacitor
Have fluid leakages been
observed?
Is the capacitor well
fastened?
Is any dilation or
retraction sign observed?
Measure the capacitance
o
o
o
o
Visual check.
Measure the capacitance with
a proper instrument.
No anomaly
Capacitance higher than
85% of rated capacitance.
Instrument for
measuring
capacity.
Input
Inductances
Is there any liquid leak?
Is there any overheated
point?
o
o
Visual check.
Measure the surface and
connectors’ temperature.
No anomaly.
Check that the
temperature is
homogeneous and below
70ºC
Infrared
thermometer.
Contactor
Is there any contactor
chatter?
Is the contact damaged?
o
o
Audible check.
Visual check. No anomaly.
C
ontr
ol
ci
rc
ui
t a
nd
Pr
ote
ctio
ns
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.
C
oo
lin
g
sy
st
em
Cooling fans
Are there any abnormal
noises or oscillations?
Is the cooling fan
disconnected?
o
o
Disconnect the power supply
(OFF) and rotate the fan
manually.
Check the connections.
Fan should rotate
effortlessly.
No anomaly.
D
is
pl
ay
Measurement
Is the displayed value
correct?
o o
Check the reading instrument
with an external
measurement.
Check the specified
values and the control
values.
Voltage meter /
Current meter
etc.
M
ot
or
All
Is there any noise or
abnormal vibrations?
Has any unusual smell
been perceived?
o
o
Audible, sensory and visual
check.
Check if damages have been
produced by overheating.
No anomaly.
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
500V