Schneider frequency converter disturbance and treatment method

A. Communication method:

(1) Radiation disturbance

(2) conduction disturbance

B. Disturbance rejection method

Nuisance signals transmitted by radiation methods are primarily weakened by wiring and by shielding the radioactive source and the nuisance line.

On the nuisance signal conveyed through the line, the primary method is to deal with the filter, reactor or magnetic ring installed on the input and output side of the converter.

Specific methods and precautions are as follows:

(1) Signal line and power line should be vertically crossed or slotted.

(2) Do not use different metal wires to connect with each other.

(3) The shield tube (layer) shall be reliably grounded, and ensure that the whole length of the continuous reliable grounding.

(4) twisted pair shielded cable should be used in signal circuit.

(5) The shielding layer connection address is far away from the converter as far as possible, and separated from the converter connection address.

(6) The magnetic ring can be used on the input power line and output line of the converter. The specific method is as follows: the input line is wound 4 times in the same direction, and the output line is wound 3 times in the same direction. When winding, please pay attention to the magnetic ring as close as possible to the frequency converter.

(7) Generally, shielding and other anti-disturbing methods can be adopted for disturbing equipment and instruments.