Se ha observado que varios de los daños provocados en los motores eléctricos son:

  • Daños por sobrecarga debido a desalineación y/o desbalanceo
  • Rodamientos en mal estado
  • Falta de lubricación oportuna
  • Acoplamientos mecánicos en mal estado

Entre otros tipos de falla, sin embargo aparece una pregunta lógica

¿Por qué se dañó el motor si cuenta con protecciones por corriente de sobrecarga?

Peor aún, una vez que se realiza la reparación, se procede a cambiar el motor reparado o se realiza el cambio por otro motor y debido a un mal diagnóstico se vuelve a dañar el motor.

El factor principal a considerar es un programa adecuado de mantenimiento predictivo y preventivo, complementado con una revisión periódica de los ajustes de protección para los motores y para la instalación eléctrica si es requerido.

La propuesta de Factor 1 es realizar un estudio de ajuste de protecciones eléctricas conforme al programa siguiente.

 

 

Puntos de revisión incluidos en la coordinación de protecciones por tablero:

  • Revisión de ajustes por sobre carga y corto circuito para interruptores principales.
  • Revisión de ajustes por sobre carga y corto circuito en arrancadores y para interruptores de motor.
  • Revisión de calibres de conductores de corriente de fase que alimentan motores.
  • Revisión de calibres de puesta a tierra de motores, incluye pruebas de puesta a tierra para cumplir requerimientos de la NOM-STPS-022.
  • Medición trifásica de corrientes de fase del consumo de motores para comparar con ajuste de protecciones y datos de placa.
  • Medición trifásica de corrientes de fase del consumo del tablero de distribución para determinar  capacidad de alimentadores del tablero de distribución, incluye determinación del factor de potencia y posibles ahorros por cargos de la C.F.E.
  • Elaboración de curvas de protección indicando ajustes recomendados para la protección de motores.
  • Elaboración de curvas de protección indicando ajustes recomendados para la protección y selectividad del tablero de distribución.
  • Elaboración de diagrama unifilar básico para determinar flujos de carga y simular capacidad de alimentadores del tablero de distribución.

Para todo esto FACTOR 1   lo puede ayudar, contáctenos y con gusto lo asistiremos.

Contacto:

Rogelio Montalvo

e-mail: rmov@factor1e.com

Cel. 55 30 21 0770.

 Soluciones en Ingeniería Aplicada

Factor 1

 

 

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