Instruction; Explosion Proof Motor Installation; Motor Compliance To Operation Site; Atex Motor - WEG Ex d Manual De Instalación, Operación Y Mantenimiento

1 InTRoDUCTIon
These instructions concern installation, operation and maintenance of motors operating in hazardous
areas and in the presence of potentially explosive atmospheres. All motors subject to these instructions are
designed with the following types of explosion proof protections:
- Ex d IIB:
With a flameproof enclosure "d" for frame and terminal box.
- Ex de IIB:
With a flameproof enclosure "d", for frame and with an increased safety enclosure "e" for terminal box.
Hazardous area motors are specially designed to comply with official regulations concerning
the risk of explosion. If incorrectly used, poorly connected or if other minimal facts occur,
their reliability could be damaged.
Standards related to connection and use of electric apparatus in hazardous areas must be
taken into consideration.
Only skilled personnel familiar with these standards should handle such apparatus.

2 EXPlosIon PRooF MoToR InsTallaTIon

2 .1 MOTOR COMPLIANCE TO OPERATION SITE

The compliance is related to zone classification and to flammable material characteristics at the installation
site.
Depending on these technical legislative instructions, motor selection must take into account the following
factors:
- Type of unit: mines (group I), surface industry (group II).
- Zone classification: 0, 1, 2 (which are suitable components of category 1, 2, 3).
- Characteristics of flammable materials present, such as gas, steam or fogs.
- Application Group: IIA, IIB, IIC.
- Temperature classes: T1, T2, T3, T4, T5, T6 (according to the highest allowable surface temperature of
the machinery and according to the ignition temperature of the combustible materials).
Besides all performance figures, the nameplate of "Ex" motors must include (item 2.2):
- The information for a correct choice of the proper motor and for its correct installation.
- The reference to the official authority involved on the certification.

2.1.1 ATEX MOTOR

The essential "safety Ex" requirements for the classified hazardous areas comply with European Directives
and Standards:
- 94/9/EC, of March 23, 1994, for the "components".
- 1999/92/ EC, of December 16, 1999, for the "classified area".
- EN 60079 series
The classification criteria, for hazardous areas, are reported by EN 60079-10 Standards.
Technical requirements of the electric motor installation, in the classified areas, are reported by EN 60079-
14 Standard.
Standards for Type of protection:
- EN 60079-0 and EN 60079-1 for "Ex d"
- EN 60079-0, EN 60079-1 and EN 60079-7 for "Ex de"
4 | INDUCTION MOTORS FOR HAZARDOUS AREAS - English -