INVT IPE300 Series - Page 278

IPE300 series engineering VFD Maintenance
-267-
Check scope
Item
Method
Criterion
Conductor and
wire
Check whether conductors are
deformed or color change for
overheat.
Visual
inspection
No exception
occurs.
Check whether the wire sheaths
are cracked or their color
changes.
Visual
inspection
No exception
occurs.
Terminal block
Check whether there is damage.
Visual
inspection
No exception
occurs.
Filter capacitor
Check whether there is electrolyte
leakage, discoloration, cracks,
and chassis extension.
Visual
inspection
No exception
occurs.
Check whether the safety valves
are released.
Determine the
service life
based on the
maintenance
information, or
measure them
through
electrostatic
capacity.
No exception
occurs.
Check whether the electrostatic
capacity is measured as required.
Use instruments
to measure the
capacity.
Electrostatic
capacity ≥ initial
value x 0.85
Resistor
Check whether there is
displacement caused due to
overheat.
Olfactory and
visual
inspection
No exception
occurs.
Check whether the resistors are
disconnected.
Visual
inspection, or
remove one end
of the
connection
cable and use a
multimeter for
measurement.
Resistance range:
±10% (of the
standard
resistance)
Transformer
and reactor
Check whether there is unusual
vibration sounds or smells.
Auditory,
olfactory, and
visual
inspection
No exception
occurs.