There can be different ideas about what qualifies as a low, medium or high voltage motor. “Some people consider anything above 1000 V as high voltage. The limits are clearly defined, however, in the IEC 60038 standard: low voltage is up to 1000 V, medium voltage is from 1000 V to 35 kV, and high voltage is over 35 kV. Electric motors operate on the principle of using the magnetic field force effects. In layman’s terms, this principle can be explained by the use of mutual attraction and repulsion of electromagnets or the attraction of electromagnets and iron. The polarity and strength of the electromagnet can be controlled by the magnitude of the current flowing into it. The electric motor has three modes of operation or modes: motor, generator and brake mode. The principle of operation is really simple.

How to test high voltage motors?

Limits of medium voltage motors

Motor´s lifetime is influenced by height of voltage. Higher voltage – longer lifetime. That is the reason why high voltage motor has to be made in the highest quality. Testing of all components is necessary. Low voltage motors are usually tested only for thermal lifetime. High voltage motors or medium voltage motors are tested for thermal lifetime too and electric lifetime in addition. A good manufacturer of electric motors has to have documentation on all motors which produce. The best manufacturer of electric motors also have to improve the production every year and be sure that his products are the best on the market. It is necessary to realize that connection of medium or high voltage motor is more complicated that connect to low voltage motor. It requires special advice and close dialogue. 

VYBO Electric a.s. is a leading specialist in rotary machines and electric motors. It specializes in selected product power and tension series. If you are interested in buying a high voltage motor, please visit https://vyboelectric.com/high-voltage-slip-ring-motors/.