Power Electronics SD 300 Series, Getting Started Manual

Page: 91 / 354

POWER ELECTRONICS SD300
MAINTENANCE
89
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.
Ins
pe
ction
s
ite
Inspection
Period
Inspection
method
Criterion
Measurement
instrument
M
onthl
y
1
ye
ar
2
ye
ar
s
C
ool
ing
sy
ste
m
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
otor
ALL
Is there any noise or
abnormal vibrations?
Has any unusual smell
been reported?
o
o
Audible, sensory
and visual check.
Check if
damages have
been produced
by overheating.
No anomaly.
INSULATION RESISTANCE
Megger test (between
the input, output and
ground terminals) o
Disconnect the
cables for
terminals U/V/W
and test the
wiring. Above 5MΩ
Megger type
500V