Hub van Doorneweg 8 • 2171 KZ Sassenheim – NL •
T
+31(0)252 228850 •
F
+31(0)252 228235 •
E
sales@euronorm.nl •
I
euronormdrives.com
Hub van Doorneweg 8 • 2171 KZ Sassenheim – NL •
T
+31(0)252 228850 •
F
+31(0)252 228235 •
E
sales@euronorm.nl •
I
euronormdrives.com
26
27
NEURN030000_220_A
NEURN030000_220_A
6.5 Wiring Precautions
Danger
Make sure that the power switch is in the OFF state before wiring operation, or electrical shock may occur!
Wiring must be performed by a professional trained personnel, or this may cause damage to the equipment and personal injury!
Must be grounded firmly, otherwise there is a danger of electric shock or fire hazard !
Note
Make sure that the input power is consistent with the rated value of inverter, otherwise which may cause damage to the inverter!
Make sure that the motor matches the inverter, otherwise which may cause damage to the motor or activate the inverter protection!
Do not connect power supply to U, V, W terminals, otherwise which may cause damage to the inverter!
Do not directly connect braking resistor to DC bus (P), (+) terminals, otherwise which may cause a fire!
• The U, V,W output end of inverter can not install phase advancing capacitor or RC absorbing device. The inverter input
power must be cut off when replacing the motor
• Do not let metal chips or wire ends into inside the inverter when wiring, otherwise which may cause malfunction to the
inverter.
• Disconnect motor or switch power-frequency power supply only when the inverter stops output
• In order to minimize the effects of electromagnetic interference, it is recommended that a surge absorption device shall
be installed additionally when electromagnetic contactor and relay is closer from the inverter.
• External control lines of inverter shall adopt isolation device or shielded wire.
• In addition to shielding, the wiring of input command signal should also be aligned separately, it is best to stay away
from the main circuit wiring.
• If the carrier frequency is less than 3KHz, the maximum distance between the inverter and the motor should be within
50 meters; if the carrier frequency is greater than 4KHz, the distance should be reduced appropriately, it is best to lay
the wiring inside metal tube.
• 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.
6.6 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
Chapter 4 Installation and commissioning
49
Cha
pt
er 4
※
External control lines of inverter shall adopt isolation device or shielded wire.
※
In addition to shielding, the wiring of input command signal should also be aligned
separately, it is best to stay away from the main circuit wiring.
※
If the carrier frequency is less than 3KHz, the maximum distance between the inverter
and the motor should be within 50 meters; if the carrier frequency is greater than 4KHz, the
distance should be reduced appropriately, it is best to lay the wiring inside metal tube.
※
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.
4-6.
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
PI500
inverter
M
3~
R
S
T
U
V
W
K1
K2
K3
MCC1
MCC2
MCC1 & MCC2 interlock ac contactor
Figure 4-22
：
Spare Circuit electrical diagram
Spare Circuit electrical diagram
