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protect the inverter input against over current or disconnect the input power for maintenance.
Please confirm that the power supply phases and rated voltage are consistent with that of the
nameplate, otherwise, the inverter may be damaged.
3.6.2 Motor Wiring
It is forbidden to short circuit or ground the inverter output terminal, otherwise the internal components
of the inverter will be damaged.
Avoid short circuit the output cable and the inverter enclosure, otherwise electric shock may happen.
It is forbidden to connect the inverter output terminals to the capacitor or LC/RC noise filter with
phase lead, otherwise, the internal components of the inverter may be damaged.
When contactor is installed between the inverter and the motor, it is forbidden to switch on/off the
contactor when the inverter is running, otherwise, large current will flow into the inverter, triggering the
inverter protection action.
Length of cable between the inverter and motor
If the cable between the inverter and the motor is too long, the high-order harmonic leakage current of
the output end will cause adverse impact on the inverter and the peripheral devices. Output AC reactor
should be installed if the motor cable is longer than 100m. Refer to the following table for the carrier
frequency setting.
Length of cable between the
inverter and motor
Carrier frequency (PA.00)
3.6.3 Grounding Wiring
The inverter will produce leakage current. The higher the carrier frequency is, the larger the leakage
current will be. The leakage current of the inverter system is more than 3.5mA, and the specific value of
the leakage current is determined by the application conditions. To ensure the safety, the inverter and
the motor must be grounded.
The grounding resistance shall be less than 10ohm. For the grounding wire diameter requirement, refer
to 3.3 Models of main circuit peripheral devices.
Do not share grounding wire with the welding machine and other power equipment.
In the applications with more than 2 inverters, keep the grounding wire from forming a loop.
18
E5−H High Performance Universal Inverter
Less than 50m
Less than 15kHz
Correct
Figure 3−3 Grounding wiring
Chapter 3 Wiring of Inverter
User Manual
Less than 100 m
Less than 10kHz
Wrong
More than 100m
Less than 5kHz
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