Drive maintenance problems set for the inverter input side of the transformer What are the requirements? When you install a large capacity machine repair Omron module, please confirm transformer impedance values, the transformer capacity is appropriate. Furthermore, in the following three cases, the input side of the inverter mounted on ac reactor. Especially in small and large capacity drive inverter is installed in the same place to note the following three points: ① transformer capacity exceeding 500kva ② distance between the transformer and the inverter input current value ③ less than 10m more than the inverter rated output current Because of the smaller grid inductance value of the harmonic current will be greater, so even the drive may cause damage to the rectifier bridge inverter repair common method Static test: 1, the test results to find the next rectifier circuit, can determine the circuit is abnormal , A. to drive internal DC power supply of P and N-terminal end, will be transferred multimeter resistance profile 140 X10 module maintenance, the red bar received P, black bars respectively according to the R, S, T, there are a few normal ten of Europe's resistance, and balance. Instead the black bars connected to the P-side, the red bar turn received R, S, T, there is a close to infinite resistance. The red bar connected to the N-terminus, repeat the above steps should get the same result. If there is resistance to phase unbalance, indicating the rectifier bridge is faulty .B. Red bar when connected to P terminal module maintenance infinite resistance, it can be concluded rectifier bridge failure or failure of a startup resistor. 2, the test inverter circuit connected to the red table rod P side, black bars are connected to U, V, a W, there should be dozens of Europe's resistance, and the resistance of each phase is basically the same, RP should be infinite. The black bars N-terminal programmable controller module maintenance, repeat the above steps should get the same results, or may be determined faulty inverter module. Shenyang Electric Co., Ltd. mainly engaged in the people of Europe, the United States, Japan and other countries manufacturers of industrial equipment, machinery products, to the world famous companies have long-term business contacts. In Germany, Japan, the United States has a liaison office. Direct purchase directly from Europe, the United States, Japan and other countries manufacturers. Similar imported products than domestic prices low, a lot of common specifications spot, fast delivery. When domestic users receive exclusive agent procurement of foreign spare parts monopoly price, we will provide a better opportunity to RMB, flexible manner. Any brand can offer in 1-3 working days. OMRON module maintenance, Shen Electric (certified), Tumen city block on the public service by the Shenyang Electric Limited. Shenyang on China Electric Co., Ltd. (www.zsmsy.com) is Shenyang, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. On Shen Electrical leadership with the staff warmly welcome all inquiries negotiations to create a better future for electric Shen.