Open Drip Proof Motors Vs Totally enclosed fan cooled Motors

One of the most common questions which arises while dealing with induction motors is what are the different types of motors available, specifically, what the difference is between an open drip proof (ODP) motor and a totally enclosed fan cooled (TEFC) motor. it’s imperative to understand the differences between the two when going through the purchasing process.

Open Drip Proof Motors:-

This type of motor are usually runs cooler and these motors doesn’t overheat. This happens because there are open vents available in chamber and air flows directly above winding. These types of motors are usually motor efficient as winding doesn’t get overheated. These motors doesn’t required external cooling as in case of other motors which have internal fan for cooling the motors. But there are often problems of dust and contaminants which can enter the motors and leads to deterioration of motors.

So in order to protect the motors from external environmental effects motor winding is laminated and sealed bearings are provided.  So these type of motors are specifically used for indoor applications.

Totally enclosed fan cooled Motors:-

These motors are required external fan to blow out air above the motors for cooling of motors. These motors have totally enclosed chamber that protects it from outside environment i.e. such as dust, contaminants and all other weather related environmental impacts. These types of motors are usually used in outdoor applications.

So if you know the weather and operating conditions of operation of motors than motor can be selected accordingly.