11 - 7
11 Maintenance and Inspection
High-function General-purpose Inverter 3G3RX-V1 User's Manual (SBCE-367)
11-1 Inspection
11
11-1-3 Inspection Items
Control
circuit
protection
circuit
Operation
check
Check output
voltage balance
between phases
during isolated
inverter run.
Measure the line
voltage between the
inverter main circuit
terminals U/T1, V/T2,
and W/T3.
Phase-to-phase
voltage balance
200-V class:
4 V max.
400-V class:
8 V max.
Digital
multimeter,
rectifier,
voltmeter
Check for
defects in
protection and
display circuits
through
sequence
protection
function test.
Simulate the output of
the inverter protection
circuit to be is shorted
or open.
Fault protection
functional in
sequence
Cooling
system
Cooling
fan
Check for
abnormal
vibration and
sound.
Rotate the fan manually
with the power off.
Smooth rotation,
no faults
Replacement
interval:
10 years
*2
*3
Check for loose
connections.
Perform visual
inspection.
Cooling fin
Check for
clogging.
Perform visual
inspection.
No clogging
Display
Indicator
Check for
blown-out LEDs.
Perform visual
inspection.
Indicator lit
Clean display
surface.
Clean it with a waste
cloth.
Meter
Check indicated
value.
Check the indicated
values on panel meters.
Specified value,
control value
Voltmeter,
ammeter,
etc.
Motor
General
Check for
abnormal
vibration and
sound.
Perform acoustic,
sensory, and visual
inspection.
No faults
Check for
abnormal odor.
No abnormal odor due
to overheating, damage,
etc.
No faults
Isolation
resistance
Perform megger
check
(between motor
terminal block
and ground).
Disconnect wires from
the inverter main circuit
terminals U/T1, V/T2,
W/T3 and short-circuit
the 3-phase motor
wires. Then, using a
megger, measure the
resistance between
each motor wire and the
ground terminal.
5 MΩ min.
500-VDC
megger
*1. The life of a smoothing capacitor depends on the ambient temperature. For the replacement guideline, refer to A-1
Smoothing Capacitor Life Curve on page A-2.
*2. The life of the cooling fan depends on environmental conditions, such as the ambient temperature and/or dust. Check its
operation condition in daily inspections.
*3. The replacement interval (in years or cycles) shown here and the smoothing capacitor life curve provided in Appendix A-1
are based on the expected design life and not guaranteed data.
Note In case that you find any problems during inspection, contact your OMRON sales representative.
Inspection
category
Inspection
item
Inspection
point
Inspection
frequency
Inspection method Criteria Meter
Daily
Periodic
1
year
2
years
To Next Page
Loading...
