Inverter maintenance problem set as the output side of the electromagnetic contactor, what precautions ① Do not run off again pull, will have a huge impact because current. It is sometimes the drive may trip. ② momentary power failure occurs, the inverter stop. Due to the instantaneous electrical power failure occurs very short period of time (0.1 seconds) when the soft-start maintenance, the contactor disconnects and the drive does not appear undervoltage alarm. Therefore, in the resumption of power generation inrush current, the inverter may overcurrent trip. Drive repair - overcurrent protection in the inverter maintenance, overcurrent protection is intended primarily with the nature of the mutation means, the peak current exceeds the allowable value of the inverter case of inverter overload due to the poor, so. inverter over-current protection is a vital part, so far, has a well developed. Overcurrent Cause: work that is over-current drive system appears in the course of their work over the current reason for substantially from the following aspects:. ① Motor encounter shock load or transmission appears "stuck" phenomenon, caused by the motor current a sudden increase in output short circuit ② side of the inverter, such as the motor output to the connecting line between the occurrence of a short circuit each other, or the occurrence of a short circuit inside the motor. ③ drive their work properly, such as an inverter bridge in the same leg Abnormal two inverters devices appear in the work process of constantly alternating. For example, the ambient temperature is too high, or the inverter device itself aging and other reasons, so that a change in the parameters of the inverter device Schneider soft-start maintenance, resulting in alternating process Siemens soft-start maintenance, a device has been turned on and the other device has not yet had time off, causing the same leg, under the two devices "through train", the DC voltage of positive and negative electrodes in a short-circuited. Shenyang Electric Co., Ltd. on the people to undertake industrial automation and control system design, installation, engineering and maintenance; professional maintenance States converter, DC governor, PLC programmer repair operations. Soft-start maintenance _ Shen electrical (certified) _ Shenyang soft-start maintenance Limited provided by the Shenyang People Electric. 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.