Inovance MD280NT2.2GB - Page 156

MD280 User Manual EMC
- 155 -
in the surrounding environment on the AC drive, and interference of the AC drive on the
surrounding equipment.
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Installation Precautions
1. The grounding cables of the AC drive and other electric products must be well
grounded.
2. The power input and output power cables of the AC drive and weak current signal
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arrangement is preferable.
3. It is recommended that the output power cables of the AC drive use shielded cables or
the power cables be shielded by steel pipes and that the shielding layer be grounded
reliably. It is also recommended that the lead cables of the equipment suffering
interference use twisted-pair shielded control cables, and the shielding layer be
grounded reliably.
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to be installed.
7.3.3 How to Handle Interference of Surrounding Equipment on the AC drive
The electromagnetic interference on the AC drive is generated because plenty of relays,
contactors and electromagnetic brakes are installed near the AC drive. When the AC drive
has error action due to the interference, the following measures can be taken:
1. Install a surge suppressor on the devices generating interference.
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7.3.6.
3. Use shielded cables as the control signal cable of the AC drive and lead cables of the
detection line and ensure that the shielding layer is grounded reliably.
7.3.4 How to Handle Interference of the AC Drive on Surrounding Equipment
The interference includes two types, radiation interference and conduction interference. The
two types of interference cause the surrounding electric equipment to suffer electromagnetic
or electrostatic induction, resulting in error actions of the surrounding equipment. Handle
different interference according to the following methods:
1. Signals of the measuring meters, receivers and sensors are generally weak. If placed
nearby the AC drive or together with the AC drive in the same control cabinet, these
instruments are easy to suffer interference and perform error actions. Handle such
situation as follows:
 Put these instruments in places far away from the interference source.
 Do not arrange the signal cables with the power cables in parallel and never bind them
together.
 Use shielded cables as the signal cables and power cables and ground the shielding
layer well.
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output side of the AC drive and wind it 2 to 3 coils.
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