Drive repair overcurrent protection processing method, when starting a liter of speed on the trip, which is very serious over-current phenomenon, mainly mechanical inspection work ① ② stuck there is no short-circuit the load side, with megger to ground There are no short ③ inverter power module there is no damage ④ motor starting torque is too small, the drag system not turn up two, when not immediately start the trip, but the trip during operation, the main check ① time setting up too fast short and longer acceleration time and deceleration time is set too short ②, ③ longer deceleration time torque compensation (U / F ratio) is set too LJ30A3-10-J / EJ, space-time caused by low-frequency load current is too large ④ electronic thermal relay setting improper operation of the current set too small, causing the drive to malfunction on China Shenyang Electric Co. to undertake industrial automation and control system design, installation, engineering and maintenance; professional maintenance States converter, DC drives, PLC programmer repair operations. The company is market-oriented, technology and development, quality of survival. The company has a sound management system, advanced testing and inspection test equipment L, a large-scale maintenance entity, truly provide customers with the best quality service. Drive repair entry - When Protecting the basic performance characteristics with varistor (1), when the impact of the strong impact of the source (or the impact of current Isp = Usp / Zs) does not exceed the specified value is not allowed to limit the voltage varistor than the protected object can withstand impact resistance voltage (Urp). (2) impact resistance, namely the varistor itself should be able to withstand the impact of the current LB-M0824LB NC, impact energy, and several attacks have occurred while the average power. (3) There are two characteristics of life, one continuous working voltage of life, that the provisions of the varistor at ambient temperature, and system voltages should be able to work reliably specified time (hours). Second, the impact of life, which can reliably withstand the impact of the number of times specified. (4) after the intervention varistor system, in addition to play a protective role in a "safety valve", it will also bring some additional influence LJ30A3-15-Z / BY, which is called "secondary effects", it should not be reduced normal operating performance of the system. Then the main factors to consider, there are three, one varistor itself capacitance (tens to tens of thousands PF), the second is in the system voltage, leakage current, three are non-linear current source impedance through the varistor coupling effects on other circuits. L, LB-0524PC 60mm, Shenyang on people (certified merchants) are provided by the Shenyang Electric Co., the people. Shenyang on China Electric Co. (www.zsmsy.com) is specialized in the "high-low-voltage inverter, high and low voltage soft starter, magnetic switches, programmable logic controller (PLC)" of the enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Wei Song.