Large crane frequency converter maintenance
Customer: Shenzhen a building materials Co., Ltd.
Name: Crane
Model: Yaskawa H1000-75KW
Fault causes: running UV3 alarm
Failure analysis: a simple introduction: crane widely used in indoor and outdoor warehouses, factories, docks and open storage yard, etc.. The hoisting mechanism comprises an electric motor, a brake, a speed reducer, a drum and a pulley block. The electric motor drives the drum to rotate through the speed reducer, so that the steel wire rope is wound on the drum or is dropped from the drum to lift the heavy object. Small frame is a support and installation of lifting bodies and car running institutions and other parts of the rack, usually for welding structure. Hong Jia Wei: maintenance of the crane for lifting molten iron into the mixer furnace, furnace and hoisting molten steel continuous casting device or ingot molds used. The main trolley filled bucket, side car to flip bucket and other auxiliary work, in order to expand the scope of the use of the auxiliary hook and better for steelmaking process service, main and auxiliary hook are respectively arranged in each main and auxiliary car independent car run institutions, and along their own orbits.
According to the scene on jump UV3 alarm, open the shell found the brake control section has obvious burn, after the restoration of electricity that live in the relay no pull detection relay has been bad, after the failure to lift replacement. The analysis may be outside of the brake unit to burn inverter brake control loop alarm.
The common faults of the large crane frequency converter: no display, lack of phase, over current, over current, over voltage, under voltage, over heat, over load, ground, parameter error, display no output, module damage, replacement parts, etc..
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw