Maintenance for motors in hazardous area environments - to be presented at HazardEx 2012
Author : Eriks Zvaigzne, Technical Consultant - Association of Electrical & Mechanical Trades (AEMT)
20 December 2011
Thirty years ago the repair industry concluded that the refurbishment of Ex power equipment was in need of a definitive guide on the ‘best practice techniques and procedures for Ex repair’.
In 1984, after a 4 year project, The Association of Electrical and Mechanical Trades (AEMT), and the British Electrotechnical and Allied Manufacturers Association (BEAMA), jointly published the first BEAMA - AEMT Ex Code of Practice, Repair and Overhaul, of Ex Electrical Apparatus.
The usefulness of the document was recognised internationally as the Ex repair standard, IEC BS EN 60079-19, first published in 1993. This was almost identical to the original AEMT BEAMA Code of Practice.
What has been the experience of three decades using the above documents?
The original needs for repairs to be safe, undertaken by capable facilities and personnel, using accepted repair techniques, to the original Ex construction standards’ specifications, have not changed. In many parts of the world the use of the harmonised IEC 60079 series of design, installation, inspection, maintenance, and repair standards have been adopted as normative. Awareness of Ex issues and the complementary need for training continues to be an Ex industry concern.
In Europe ATEX formalised many product and user safety requirement but this also needs to be filtered down to the practical level of ‘hands-on’ operatives providing a 24/7 service to the Ex equipment users.
It is worthwhile to consider some of the issues that the AEMT has come across during its many Ex training courses and in correspondence with Ex users.
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