Explosion Protected Motors Inspection and Maintenance

There are no prerequisites for this course. 

• Illustrate a theoretical and technical knowledge in the dismantling, re-assembly and testing of explosion protected electrical motors.
• Understanding of the requirements for the inspection and maintenance of explosion protected electrical motors.
• Understanding Protection concepts for Ex’d’; Ex’e’; Ex’n’ or N and Ex’p’ types of protection.

• Properties of flammable materials. Gas and apparatus grouping. Area and temperature classification. Ingress protection. Standards, Certification and label reading. Principles of Flameproof Ex’d’; Increased Safety Ex’e’; Non-Incendive ExN’n’ or N, Ex’p’ protection.
• Non-Incendive (Non-Sparking) Ex’n’ or N Motors:*Constructional features. Relevant British Standards and Codes of Practice
• Ex’de’ Motors:*Constructional features of such motors and terminal arrangements. Relevant Standards and Codes of Practice. Applications. Consideration of the repair techniques permitted for Explosion Protected Motors.
• Flameproof Ex’d’ Motors:*Construction, Standards and Codes of Practice. Dismantling and inspection. Measurement of flamepaths. Bearing removal and fitting. Winding, cleaning and drying. Terminal marking. Electrical testing. Thermistors, RTD’s. Anti- condensation heaters.*Flamepaths. Reassembly. Drive pulleys, pinions and couplings. Thermal overload devices and test running.
• Increased Safety Ex’e’ Motors:*Constructional features, specifically for the elimination of arcs/sparks and excessive surface temperatures. Standards and Codes of Practice. Limitations of use. Selection of overload devices with regard to tE time and Ia/In current ratios.

Delegates will undertake a multiple-choice examination paper to demonstrate they have achieved the key learning outcomes detailed above.

Safety footwear, coveralls and gloves.

This is a classroom based course with practical training exercises to underpin knowledge gained. The course will consider the practices set out by the motor manufacturer.