single phase motor winding resistance values

The reading between S and R should give the highest reading (Ohms).In single phase motors there are a few rules to go by: Anything higher than this could show an earthing fault with the motor. If the motors is in good condition it should read less than 0.5 Ohms. Using a multimeter you should check the resistance between the motors body and earth. How to perform earth continuity and resistance tests This is one of the easiest tests to perform, when you develop experience with handling and working around motors you will quickly understand what feels right and also when there maybe a problem.

If it seems stiff or hard to turn you potentially will need to replace the bearings. If this is easy to do then the bearing/bearings are likely in good condition. With the motor isolated you should try and manually turn the motor. Check the condition of the shaft, cooling fan and main body of the motor. How to perform a physical check of the motorįirst you should inspect all elements of the motor. Please look at the testing methods below to check both the motors internal and external components. When testing any AC motor the primary objective is to test the health of the motor internally and externally. They consist of a start winding, run winding and a common winding. However, they all share the same type of internal motor windings. When working in engineering or a manufacturing process you will realise that there are a number of different single phase motors. In this guide we have outline the various tests and methods that are required to test a motors health and workings. A number of different tests/testing methods maybe required to test both the health and the functionality of a motors.

Single phase motor winding resistance values