6-6
6-1 Inspection and Maintenance
6
Inspection and Maintenance
Motor
General
Check that there
are no abnormal
vibrations or
sounds.
{
Acoustic, feeling, and/
or visual inspection
No faults
Check that there
are no abnormal
odors.
{
Check that there is no
abnormal odor
caused by damage or
overheating.
No faults
Insulation
resistance
Megger check
(Between the
collective motor
terminals and
ground terminal)
{
Disconnect Inverter
main circuit terminals
U/T1, V/T2, and
W/T3, and short-
circuit the 3-phase
motor wires. Then,
use a megger to
measure the
resistance between
the motor wire and
ground terminal.
5 M min.
500 V DC
megger
Inspection
part
Inspection
item
Inspection point
Inspection period
Inspection method Criteria Meter
Daily
Periodic
1 year 2 years
*1. The life of the smoothing capacitor depends on ambient temperature.
Refer to "Appendix-2 Product Life Curve" for the replacement reference.
*2. The life of the cooling fan varies depending on the environmental conditions, such as ambient temperature
and/or dust. Check the operation through daily inspections.
*3. The replacement reference (year/cycle) or "
Appendix-2 Product Life Curve" is based on the expected design
life, which is not guaranteed.
To Next Page
Loading...
