LSIS SV-iS7 series User Manual

Chapter 7 Checking and Troubleshooting
G
7-13
(3) Regular Checking (1 year interval)
Area
Checking
points
Description How to Check Judgment Criterion
Instrument
Main circuit
Entire system
1) Megger checking
(between the main
circuit terminal and
ground terminal)
2) Isn't any fixed area
missing?
3) Isn't there any trace
of overheat on each
component?
1) Unfasten the
connection of inverter,
connect R, S, T, U, V,
and W terminals, and
then measure the gap
between this area and
the ground terminal
using a megger.
2) Fasten the screws.
3) Check it visually
1) To be 5Mȍ or more
There must be no
unusual result from 2)
and 3)
DC 500V Class Megger
Conductor
/Wire
1) Isn't there any
corrosion on the
conductor?2) Isn't
there any damage to
the wire sheath?
1) Switch the power
Off and then turn it
with a hand.
2) Fasten it once
again.
1) Rotate it softly
2) There must be no
unusual record
-
Terminal
block
Isn't it damaged? Check by eyes.
There must be no
unusual record
-
Flat
condenser
Measure the
electrostatic capacity
Measure using the
capacity meter.
85% or more of the
rated capacity
Capacity meter.
Relay
1) Isn't there any
chattering sound?
2) Isn't there any
damage to the contact
point?
1) Check by ears.
2) Check by eyes.
There must be no
unusual record
-
Resistance
1) Isn't there any
damage to the
insulation resistance?
2) Check the existence
of the clue
1) Check by eyes.
2) Remove the
connection at one
side, and measure it
using a tester.
1) There must be no
unusual record
2) It should be within
±10% tolerance range
Digital Multi- Meter/Analog Tester

LSIS SV-iS7 series Specifications

General

Brand	LSIS
Model	SV-iS7 series
Category	Inverter
Language	English