In just three weeks, MENZEL delivered a water-cooled, pressure-encapsulated (Ex-p) compressor motor to Austria’s largest plastics manufacturer. This was possible because both the base motor and the required Ex-p system were available from stock, and we have the expertise to convert standard motors to Ex-p in-house, TÜV-certified.

Challenge: High safety requirements with minimal lead time

The customer urgently required a replacement for a compressor drive operating in a hazardous area (Zone 1). In addition to complying with the protection class II 3G Ex pzc IIB T3 Gc, fast availability was critical, as the compressor plays a key role in the production process. The new motor had to fit exactly into the existing footprint, including foundation dimensions, flange positions, and connection geometries.

All necessary modifications to the stock motor had to be completed within three weeks. MENZEL engineers were on-site even before order placement to review the installation situation and clarify all technical details.

Solution: Perfect combination of stock availability, engineering expertise, and Ex-p know-how

MENZEL successfully executed the project because both the suitable squirrel-cage motor from the MEBKSW series and the pressure-encapsulated Ex-p system were immediately available from stock – a decisive advantage over many other manufacturers.

The stock motor was extensively adapted to the application and installation site. The housing was equipped with purge flanges, allowing the motor to be flushed with a non-ignitable gas mixture before start-up, while overpressure during operation prevents the ingress of hazardous gases. The motor was certified II 3G Ex pzc IIB T3 Gc, and all testing according to applicable Ex standards was performed in our in-house certified test facility.

Additional modifications included:

• Conversion to cooling type IC 81W (water-cooled)
• Mechanical adjustment of frame size from 560 to 630
• Relocation of terminal boxes
• Preparation of the star-point terminal box for current transformers
• Adjustment of bearing flange connections
• Installation of vibration sensors

Thanks to close cooperation between engineering, manufacturing, and quality assurance, all mechanical and electrical work was completed within three weeks and delivered via special truck. MENZEL also offered technical supervision for commissioning.

Contact:

Menzel Elektromotoren GmbH

Am Alten Walzwerk 2

16761 Hennigsdorf, Germany

Phone: +49 30 349 922-0

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Internet: www.menzel-motors.com