Power Electronics SD300 Series - Page 89

POWER ELECTRONICS
SD300
MAINTENANCE
87
Inspection site
Inspection
Period
Inspection
method
Criterion
Measurement
instrument
Monthly
1 year
2 years
All
AMBIENT CONDITIONS
Are the ambient
temperature and
humidity within
specification?
o
Visual check
Temperature: HD
IP20:
-10~50˚C
(14~122˚F) / HD
IP66: -10~40˚C
(14~104˚F) / ND:
-10~40˚C
(14~104˚F).
Humidity: below
95% non-
condensing.
Thermometer,
Hygrometer,
Recorder.
MODULE
Are there any abnormal
noises or oscillations?
o
Visual and
audible.
There are no
anomalies.
POWER VOLTAGE
Are the input and output
voltages normal?
o
Measure voltage
between R/S/T
phases in. the
terminal block.
Values are within
Standard Ratings
(see section 2).
Digital
multimeter
tester
Main circuit
ALL
Megger test (between
input / output terminals
and ground terminal)
o
o
Disconnect drive
and short R/S/T/
U/V/W terminals,
and then
measure from
each terminal to
the ground
terminal using a
Megger.
Above 5MΩ
Megger type
500V
Is there anything loose
in the device?
o
o
Tighten up all
screws.
No anomaly.
Is there any evidence of
parts overheating?
o
o
Visual inspection
No anomaly.