Troubleshooting guide when motor overload trip

30/07/2013 by 10 Comments

On my last post,I’d discussed about motor overload relay that are common used for motor starter application.As we known,the main purpose of motor overload relay is to protect our electric motor winding from mechanical overload that can result the serious damage.

This time I want share basic guideline or troubleshooting method how to troubleshooting when motor overload relay trip.I hope this post can give some ideas or clear view when you face this similar problem during your routine jobs. read more

Filed Under: Motor Control Tagged With: , , , , ,

Motor Protection : Over temperature

22/08/2012 by 3 Comments

Motor temperature is one of the factor that we should monitor and make sure it running in a normal range.It is closely related with winding temperature.If temperature is highly from standard value,it can cause a winding insulator damage or weak.

From that damage,it will make the internal short circuit between winding phase and can cause a serious damage for an electric motor.

What is the main reason for the motor overheat or over temperature?Normally it cause due to a high ambient temperature,under sizing motor capacity,not suitable voltage rated,running in overload and bearing jammed. read more

Filed Under: Motor Control Tagged With: , , , ,

Measurement of insulation resistance

30/05/2011 by 9 Comments

This measurement important to determine the winding condition for electric motor,electric cables,electrical installation,transformer,circuit breaker,heater and electrical equipment.

From the data of insulation resistance,we can make a perfect and clear decision either the electrical equipment in good condition or not.

The insulation resistance testing also can avoid serious damage,fire or electric shock to public and personal.It also can protect and pro long the life span for electrical equipment.We can detect any abnormal condition earlier and rectify quickly and avoid major damage. read more

Filed Under: Electric Motor Tagged With: , , , , , , ,