Chapter 4 Installation and commissioning
25
Ch
ap
ter 4
※
When the inverter is additionally equipped with peripherals (filter, reactor, etc.), firstly
measure its insulation resistance to ground by using 1000 volt megger, so as to ensure the
measured value is no less than 4 megohms.
※
When the inverter need to be started frequently, do not directly turn power off, only the
control terminal or keyboard or RS485 operation command can be used to control the
start/stop operation, in order to avoid damage to the rectifier bridge.
※
To prevent the occurrence of an accident, the ground terminal(
)must be earthed
firmly(grounding impedance should be less than 10 ohms), otherwise the leakage current
will occur.
※
The specifications on wires used by the main circuit wiring shall comply with the relevant
provisions of the National Electrical Code.
※
The motor's capacity should be equal to or less than the inverter's capacity.
4-7.
Spare Circuit
When the inverter occurs the fault or trip, which will cause a larger loss of downtime or other
unexpected faults. In order to avoid this case from happening, please additionally install spare circuit
to ensure safety.
Note: Electrical diagram MCC1 and MCC2 interlock ac contactor; Spare circuit must be
confirmed in advance and test running characteristics, make sure that the power frequency and
frequency conversion phase sequence
JI500
inverter
M
3~
R
S
T
U
V
W
K1
K2
K3
MCC1
MCC2
MCC1 & MCC2 interlock ac contactor
Diagram 4-17
：
Spare Circuit electrical diagram
