Electric hoist motor protectors
Mechanical development of electronic and intelligent electric hoist motor protectors from the past, can directly display the motor current, voltage, temperature, and other parameters, sensitivity, high reliability, multi-function, commissioning, protection action after failuretypes at a glance, both to reduce the damage to the motor, but also greatly facilitate the fault of the judge, conducive to the production site troubleshooting and shorten recovery of production time.
Insulation technology continues to evolve, both in the design of the motor requires increased output, and requirements to reduce the volume, so that the heat capacity of the new electric hoist motor is getting smaller and smaller, the load capacity is growing weak; production again due to increased automation, the motor is often put forward higher requirements in a variety of ways of frequent starting, braking, reversing, and variable load, the motor protection device.
Traditional electric hoist motor protection device thermal relay, thermal relay low sensitivity, large errors, poor stability, protection unreliable. The fact so many devices installed thermal relay, motor damage and influence the normal phenomenon still common.
Electric hoist motor protectors are not the most versatile, is not the so-called advanced, but should meet the actual needs, to achieve the unification of the economy and reliability, high performance and low cost. Reasonable to choose the type of protection, function according to the actual site conditions, taking into account the protection installation, adjustment, easy to use, it is more important to choose high-quality protection.