Daily And Periodic Inspection Items - BENSHAW RSi GX Series Hardware Manual

Daily and Periodic Inspection Items

8.8 Daily and Periodic Inspection Items
Is there any dust?
1Is the ambient temperature and humidity
Environment
adequate?
Equipment Is there any abnormal oscillation or noise?
Input Is the input voltage of the main circuit
Voltage normal?
Megger check
(between the main circuit and the ground)
Are any fixed parts removed?
All
Are there any traces of overheating at each
component's cleaning?
Is the conductor oxidized?
Conductor /
Wire
Is the wire coating damaged?
Terminal Is there any damage?
IGBT Check the resistance between each of the
Module/ terminals.
Diode
Module
Is there any liquid coming out?
Is the safety pin out, and is there any
Smoothing
swelling?
Capacitor
Measure the capacitance.
Is there any chattering noise during
operation?
Relay
Is there any damage to the contact
Is there any damage to the resistor
insulation?
Resistor
Is the wiring in the resistor damaged
(open)?
Operation Is there any unbalance between each phases
Check of the output voltage?
Nothing must be wrong with display circuit
after executing the sequence protective
operation
Cooling Fan Is there any abnormal oscillation or noise?
Is the connection area loose?
Meter Is the displayed value correct?
All Are there any abnormal vibrations or noise?
Is there any unusual odor?
Insulation Megger check (between the output terminals
Resistor and the ground terminal)
Period
Inspection
O
O
O
O
O
O
O
O
O
O
O O
O
O
O
O
O
O
O O
O O
O
O
8 - Troubleshooting & Maintenance
Inspection Method
Refer to the precautions
Use sight and hearing
Measure the voltage between the
terminals L1/R, L2/S, L3/T
None. Consult Factory
Tighten the screws.
Visual check.
Visual check
Visual check
Undo the VFD connection and
measure the resistance between
O
R,S,T and U,V,W with a tester.
Visual check.
Measure with a capacitance-
measuring device.
Auditory check.
Visual check
Visual check.
Disconnect one of the
connections and measure with a
tester.
Measure the voltage between the
output terminals U, V and W.
Short and open the VFD
protective circuit output.
Turn OFF the power and turn the
fan by hand.
Tighten the connections.
Check the meter reading at the
exterior of the panel
Auditory, sensory, visual check.
Check for overheat and damage.
O
Disconnect motor from VFD and
short motor leads together.
Measuring
Criterion
Instrument
Temperature:
Thermometer,
-10~+40 no freezing.
Hygrometer,
Humidity:
Recorder
Under 90% no dew
No abnormality
Digital Multi-
Meter/Tester
No fault
No fault
No fault
Digital
(Refer 'How to Check
Multi-Meter /
Power Components")
Analog Tester
No fault Capacitance
Measuring
Over 85% of the rated
Device
capacity
No fault
No fault Digital
MultiMeter /
Analog Tester
Error must be within 10%
the displayed resistance
The voltage balance
between the phases for Digital
200V (800V) class is Multi-Meter/
under 4V (8V).The fault Rectifying
circuit operates according Voltmeter
to the sequence.
Must rotate smoothly.
No fault
Check the specified and Voltmeter /
management values. Ammeter etc.
No fault
Over 5MO 500V class
Megger
155