Attention For Main Circuit Wiring - V&T E5 Series User Manual

3.6 Attention for Main Circuit Wiring

3.6.T Power Supply Wiring
It is forbidden to connect the three phase power supply cable to the inverter output terminals;

otherwise, the internal components of the inverter will be damaged.
The inverter shall connect to the power supply through a circuit breaker or RCCB and contactor to

protect the inverter input against over current or disconnects the input power for maintenance.
Please confirm that the power supply phases, rated input voltage are consistent with the

nameplate, otherwise, the inverter may be damaged.
3.6.T Motor Wiring
It is forbidden to short circuit the inverter output terminals or short circuit to ground, otherwise the

internal components of the inverter will be damaged.
Do not short circuit the output cable to the inverter enclosure, otherwise electric shock may

happen.
It is forbidden to connect the output terminal of the inverter to the capacitor or LCTRC noise filter

with phase lead, otherwise, the internal components of the inverter may be damaged.
When contactor is installed between the inverter and motor, it is forbidden to switch onToff 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
the inverter and the peripheral devices. Output AC reactor should be installed if the motor cable is
longer than T00m, Refer to the following table for the switching frequency setting.
Length of cable between inverter and motor
Switching frequency (PA.00)
3.6.3 Grounding Wiring
The inverter will produce leakage current. The higher the switching 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 T0 ohm. 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 T inverters, keep the grounding wire away from forming a loop.

E5 Series High Performance Universal Inverter
order harmonic leakage current of the output end will cause adverse impact on
−
Correct
Figure 3−3 Grounding wiring
Chapter 3 Electrical Installation
User's Manual
≤ 50m ≤ T00 m
＜ T5kHz ＜ T0kHz
＞ T00m
＜ 5kHz
Wrong
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