Electric Motor Testing Standards

Electrical standards and approved codes of practice.

Electric motor testing standards. How to test and check single phase electric motors. For bearings fitted with proximity probes the unfiltered peak to peak value of vibration including shaft run out at any load between no load. Bearings are located at both ends of the motor which are sometimes called bell housings or end bells. With the motor at normal operating temperature the vibration velocity shall not exceed 2 8 mm s rms or 4 mm s peak in any direction.

The measurements shall be carried out with an instrument conforming to iso 2954 10 1000 hz frequency range. Ss95211 authorized licensed use limited to. For the next few weeks we will be reviewing various standards associated with electric motor testing. Current global motor energy efficiency standards published all iec international electrotechnical commission standards can be purchased at www iec ch a preview of each standard on rotating electrical machines is available below including the table of contents foreword scope and normative references both in english and french.

Many electric motor failures are caused by bearing failures. Begin to check the bearings of the motor. The bearings allow the shaft or rotor assembly to turn freely and smoothly in the frame. Additional standards and codes of practice would generally be needed to satisfy a specific application it is the responsibility of the specifier to select and apply these.

There are a few very often mentioned standards like the ieee43 and ieee95. Electric motor standards as defined by the iec and the harmonized european standard custom search. Listed below are some commonly used electrical standards and approved codes of practice. Ieee standard test procedure for polyphase induction motors and generators 3 park avenue new york ny 10016 5997 usa ieee power engineering society sponsored by the electric machinery committee 4 november 2004 print.