Description
Explosion-proof electric motors
We supply ATEX motors suitable for installation in the following potentially explosive areas:
II 2G Ex db IIC T4/T5/T6 Gb
II 2G Ex db eb IIC T4/T5/T6 Gb
II 2G Ex eb II T4/T5/T6 Gb
II 2D Ex tb IIIC T135 Db
II 3G Ex ec IIC T4 Gc
II 3D Ex tc IIIC T135°C Dc IP65
ATEX stands for Atmosphere Explosibles.
ATEX certification is mandatory for all products installed in potentially explosive environments in the Member States of the European Union.
It is the end user's responsibility to indicate the appropriate protection they need.
The first step in engine selection is to correctly identify the hazard area. If an electric motor must be installed in an area where explosives are likely to be present, it is the responsibility of the end user to correctly identify the class, category and group appropriate to prevent sparks, overheating or short circuits that could cause an explosion.
Electric motors are available with the following types of protection: explosion-proof, increased safety, non-sparking.
ATEX distinguishes four groups of gases based on their flammability (from a flame or spark; not by spontaneous combustion).
Group I (mines) is only one group of gases, i.e. methane.
Group II is divided into IIA, IIB, IIC. IIB certified electrical equipment may be used in applications requiring Group IIA equipment.
IIC certified electrical equipment can be used in applications requiring Group IIA and IIB.
Among the explosive dusts, the most common use is in the processing of wheat, coal, sugar, wood and some chemicals such as sulphur.
The IEC 60079-0 standard defines a new atmosphere group III for dusts (e.g. ATEX group II).
There are three "dust groups" defined by the properties of the dust:
