Explosion Protected Motors
- Inspection And Maintenance

Course Duration (Days) :


Assessment :

Theoretical - 30 MCQ

Practical –
Dismantle & Assembly of Exd Motor, Inspection of main component parts, flamepath measurement

Certification :

ATTS Certificate of Completion.


To train personnel in the correct procedures for the overhaul of explosion protected motors in accordance with

codes of practice & manufacturer’s procedures, and to consider the certification aspects.

Who Should Attend

Personnel involved in the inspection and maintenance of explosion protected electrical motors, and where practical competency in the dismantling, re-assembly and testing is required. Delegates should have previously attended hazardous areas courses, although the principles of explosion protection methods Ex‘d’, Ex‘e’, Ex‘n’ and Ex‘p’ will be presented as a refresher.

Entry Requirements

Pre-requisite - 5 Days CompEx course

Course Syllabus

  • General principles including gas grouping, area classification, ignition temperature and ingress protection. Constructional, installation and inspection standards; and equipment marking. Overview of methods of protection flameproof Ex d; increased safety Ex e; non sparkling Ex n and pressurisation Ex p.
  • Flameproof Ex D Motors
    Construction, Dismantling, inspection and reassembly. Flamepaths. Measurement of flamepaths. Bearing, removal and fitting. Terminal marking. Electrical insulation testing.
  • Increased Safety Ex ‘e’ Motors
    Constructional features, specifically for the elimination of arcs/sparks and excessive surface temperatures. Limitations of use. Selection of overload devices with regard to tE time and Ia/In current ratios.
  • Ex d Motors
    Special features, and terminal arrangements.
  • Pressurisation Ex p motors
    Constructional features. Applications.

Application Procedure

All applications are to be submitted online / via email at least 3 days prior to course commencing date. Successful applicants will receive the course confirmation and payment advisory email. Registration is only confirmed upon full payment of course fees.



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