Drive maintenance problems set for what specific measures the interference problem? To produce interfering (drive) ...... countermeasures ① conducted interference on the input side service interference filter Xi'an soft start, use noise filter on the input side (input only), a zero-phase reactor, ground capacitance, insulation transformer . ② inductive interference ...... the input / output lines, power lines, signal lines separated. Schneider soft start using shielded cable repair, and use Power Line Filters (common choke, magnetic), properly grounded. ③ radiated interference ...... attention control cabinet installation and power line metal tubing. Reduce the carrier frequency is also effective. To produce interfering (inverter) measures the volume and large, and high prices. To be interfering countermeasures if disturbed wire or well-targeted, then it for processing. If you do not clear, it is based on the following sequence below: ① as far away from the inverter. ② signal use shielded wire and shielded wire only at one end and a common terminal phase. ③ can also use magnetic and filter capacitor. ④ Plug in the power line filters (normal choke, a small noise filter) into the power lines. Separate ground wire drive ⑤ how to solve maintenance problems set higher harmonic problem? Diode rectifier circuit will ...... ...... 5,7,11,13 third harmonics of. Impact: current increases, the power factor drops Solution: Please install the ac or dc reactor (approximately 3% drop) abb soft start repair, soft-start maintenance Wafangdian, Shen electrically by the people on the Shenyang Electric Co., Ltd. provided. Shenyang Electric Co. on people (www.zsmsy.com) (www.smdqee.com) strong, credible, and other industries in other Shenyang, Liaoning province has accumulated a large number of loyal customers. The company better work attitude and constantly improve the innovative ideas will lead sink into the brilliant electric and you work for a better future!