Explosion Protected Motors - Inspection & Maintenance

Target Audience:

Personnel involved in the inspection and maintenance of explosion protected electrical motors, and where practical competence in the dismantling, re-assembly and testing is required. Delegates should have previously attended hazardous areas courses because the principles of Explosion Protection for Ex’d’; Ex’e’; Ex’n’ or N and Ex’p’ will be presented as a refresher.

Key Learning Outcomes:     

• Awareness and practical competence in the dismantling, re-assembly and testing of explosion protected electrical motors.
• Awareness in 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

Course Content:

• 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

Assessment:

Each delegate will undertake an open book multiple-choice examination paper to demonstrate they have achieved the key learning outcomes detailed above.

Certification:

City & Guilds 9841 Certificate.

Required Instructor Qualification/Experience:

• SVQ Level 3 in Electrical Engineering or equivalent

• Minimum 5 years experience in electrical plant and equipment Installations

• A1 or equivalent Workplace Assessor

• City & Guilds approved Training Instructor

Min/Max Number of Delegates Required per Event:

2/8, course duration and times may vary depending on delegate numbers.

Special Requirements:

Delegates are required to supply their own PPE.

Note to Clients:

The course will consider the practices set out by the motor manufacturer. To set up a course specifically for your company or if the dates above are not suitable please contact the ASET Customer Service Team for additional dates.