Withstand Voltage Test - Hyundai n 700 Instruction Manual

N700 Operating Instructions and Parts Manual
Inspection Inspection
Parts item
Control
circuit Operation
protection check
circuit
Cooling
Cooling fan
system
Display
Display
Meter
Whole
Motor
Insulated
resistance
(Note) Lifetime of the capacitors depends on the ambient temperature.
Please refer to chapter 15.4 [Capacitor Life Curve].
15.3

Withstand Voltage test

Never perform a withstand voltage test on the inverter.
The inverter main circuit uses semiconductors. Semiconductors can deteriorate when a withstand
voltage test is performed.
Inspection cycle
Inspection
item Daily
(1) Confirm balance
of each output
phase voltage
with inverter
single operation.
(2) Operate
sequence
protection moving
test. And no
abnormality.
(1) Is there abnormal O
vibration,
abnormal sound?
(2) Is there loosening
of connecting
parts?
(1) Is the LED lamp O
illuminated?
(2) Cleaning.
Is direction value O
Normal?
(1) Is there abnormal O
signal, abnormal
sound?
(2) Is there any O
abnormal occur?
(1) Megger check
( terminal
collection earth
terminal)
Table 15- 1 Daily inspection and regular inspection
Inspection methods
Year
1 2
O (1)
Measure inverter output
terminal U, V, W phase
voltage.
(2)
O Short or open protection
circuit output of inverter.
(1) Revolve by hands in
the state of tone-on idle.
(2) By watching.
O
(1)
Lamp indicates lamp on
operator.
(2)
Cleaning with cloth.
O Confirm indication value of
board meter.
(1)
By hearing, feeling,
watching.
(2)
Abnormal odor from
overheat, damage etc.
confirmation.
O (1)
Remove connection to U,V
and W and disconnect
motor wiring.
152
15. Maintenance and inspection
Decision standard
(1)
Phase voltage
balance 400V class
is within 8V.
(2)
On sequence, to
operate abnormality.
(1)
Revolving smooth.
(2)
No abnormality.
(1)
Confirm light.
Satisfy normal
value, control value.
(1)(2)
No abnormality.
(1)
To be over 5M ohm.
Meter
Digital
multimeter
rectification
type voltmeter
Voltage meter,
current meter
DC 500V
Megger