Resumo

MARTINEZ GARCIA, Antonio et al. Thermal protection settings for medium voltage motors, necessary information. Energética [online]. 2024, vol.45, n.1, pp. 99-110.  Epub 30-Mar-2024. ISSN 1815-5901.

Medium voltage motors must be protected more rigorously than low voltage motors considering that they take longer to transfer the heat generated in their windings to the environment. It is essential to have the following minimum information: stator damage curve under normal working conditions, hot and cold locked rotor tests of the motor, results of vacuum and short circuit tests, type of load on the motor shaft to evaluate the heating of the engine during its acceleration at start-up, especially in the case of heavy starting. In many cases it turns out that users do not have the information related above and the problem to be solved is how to proceed to estimate thermal protection in the event that this information is not available? This work proposes the steps to follow when this situation arises.

Palavras-chave : damage curves; locked rotor; thermal protection.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )