Mitsubishi Electric FR-S500 Instruction Manual page 58

Inspection
Inspection Item
Item
(1) Check with
megger
(across main
circuit
terminals and
earth
(ground)
terminal).
General
(2) Check for
loose screws
and bolts
(3) Check for
overheat
traces on the
parts
(4) Cleaning
(1) Check
conductors
for distortion.
Conductors,
cable
(2) Check cable
sheaths for
breakage
Terminal Check for
block damage.
Inverter
Check
module,
resistance across
Converter
terminals.
module
(1) Check for
liquid
leakage.
(2) Check for
Smoothing safety valve
capacitor projection
and bulge.
(3) Measure
electrostatic
capacity.
(1) Check for
chatter
during
operation.
Relay
(2) Check for
rough
surface on
contacts.
Precautions for maintenance and inspection
Interval
Periodic*
Method
(1) Disconnect
all cables
from the
inverter and
measure
across
terminals
R, S, T, U,
V, W and
earth
terminal
with
megger.,
(2) Retighten
(3) Visual
check
(1), (2) Visual
check
Visual check
Disconnect all
cables from the
inverter and
measure
across
terminals R, S,
T↔P, N and
U, V, W↔P, N
with a meter
range of 100Ω.
(1), (2) Visual
check
(3) Measure
with
capacity
meter
(1) Auditory
check
(2) Visual
check
53
Criterion Instrument
(1)5MΩ or more 500VDC class
(2), (3) No fault megger
(1), (2) No fault
No fault
Refer to page
Analog tester
55.
(1), (2) No fault. Capacity
(3) 85% or more meter
of the rated
capacity
(1) No fault
(2) No fault
7