Power Electronics SD750 Series User Manual

POWER ELECTRONICS
SD750
MAINTENANCE
81
EN
Inspection site
Inspection
element
Inspection
Period
Inspection method
Criterion
Instrument of
Measurement
Monthly
1 year
2 years
All
Ambient
conditions
Are there dust particles?
Are the ambient
temperature and the
humidity within
specification?
o
Visual check
Temperature:
-20 to +50
Humidity: below 95% non-
condensing.
Thermometer,
Hygrometer,
Recorder.
Module
Are there any abnormal
noises or oscillations?
o
Visual and audible.
There are no anomalies.
Input power
Is the input power to the
main circuit correct?
o
Measure the voltage between
terminals L1, L2, L3 and PE.
Digital
multimeter.
Tester.
Power
connections
Are the power terminals
correctly fastened?
o
Measure the temperature and
the torque of the connections
Fasten the set screws one
week after the start-up.
Check that the
temperature is
homogeneous and below
70ºC.
Infrared
thermometer,
torque wrench.
Main circuit
Conductor/
Cable
Is the conductor
corroded?
o
Visual check.
No anomaly.
Is the sheathing of the
cable damaged?
o
Visual check.
No anomaly.
Terminal
Is any damage visible?
o
Visual check.
No anomaly.
IGBTs module
Diodes module
and Rectifier
Check the resistance
value between each one
of the terminals
o
Disconnect the drive
connection and measure the
resistance value between:
R, S, T  VDC+, VDC-
and
U, V, W  VDC+, VDC-
with a tester > 10k
Digital
multimeter.
Analogue tester.
Correct capacitor
Have fluid leakages been
observed?
o
Visual check.
No anomaly.
Are the pins well
fastened?
o
Visual check.
No anomaly.
Is any dilation or
retraction sign observed?
Measure the capacitance
o
Measure the capacitance with
a proper instrument.
Capacitance higher than
85% of rated capacitance
Instrument for
measuring
capacity.
Input
Inductances
Is there any liquid
leakage?
o
Visual check.
No anomaly.
Is there any overheated
point?
o
Measure the surface and
connectors’ temperature.
Check temperature is
homogeneous and below
70ºC
Infrared
thermometer.
Contactor
Is there any contactor
chatter?
o
Audible check.
No anomaly.
Is the contact damaged?
o
Visual check.
No anomaly.
Control circuit
and Protections
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.
Cooling
system
Cooling fans
Are there any abnormal
noises or oscillations?
o
Disconnect the power supply
(OFF) and rotate the fan
manually.
Fan should rotate
effortlessly.
Is the cooling fan
disconnected?
o
Check the connections.
No anomaly.
Check that fans rotate
smoothly.
o
Visual check.
No anomaly.

Power Electronics SD750 Series Specifications

General

Brand	Power Electronics
Model	SD750 Series
Category	DC Drives
Language	English