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Explosion- proof increased safety motors

Explosion- proof increased safety motors offered by FME INDUKTA S.A.

      Producers of electric equipment adapted for operating in areas endangered by explosion and who work in  European Union

are responsible for meeting the requirements according to ATEX 94/9/EC directive. The directive  standardized safety regulations and

procedures of its conformity.
ATEX directive orders certification of construction and production system of explosion- proof equipment by specialized institutions.
On case of Indukta certificate institution is KEMA B.V. from Holland.

     Explosion – proof motors produced by Indukta S.A. are adapted for operation in areas endangered except mining , where is methane danger

or danger caused by coal dust explosion. There are motors for operation in air mixtures with gas, vapours and mists- category 2G and for operation in air mixtures with dust – category 2D. There are also available universal versions 2G/ 2D for operation in gas and dust atmospheres.

Figure 2 means equipment category, symbol D or G means kind of atmosphere.

The motors of category 2 are adapted for operating in zones –where appearance of explosion atmosphere is probably and should be high level

of protection even in case of damages.

     Indukta also offers the motors of category 3 which have less rigorous requirements. The motors 3G or 3D are adapted for operating

in zones in which appearance of explosive atmosphere is seldom or appears in short time periods, and  level of protection is required just

during normally work.

Below table shows possibilities of using the motors.

The table of application Indukta motors in endangered by explosion zones.

     Three phase induction explosion- proof increased safety motors Ex “e” or explosion – proof non -sparking motors with type of

protection “nA” are adapted for operating in gas atmospheres category 2G or 3G characterize temperature class.
Temperature class means border temperature of any motor’s part, which exceeding is unacceptable.
Indukta produce the motors in class T3 ( 200 degree of Centigrade) and T4 ( 135 degree of Centigrade). It means that equipment can be used in gas appearance with ignition temperature higher that temperature class. Meeting high requirements placed for explosion- proof motors

required not only heat mark of the motor but also mark in respect danger of occurrence  electric arcs and electrostatic discharge.
To avoid above dangers used special terminal boards, glands Ex and certified plastics.
Distinct from fire-resistant motors type “d” motor construction and proper protections prevent from gas ignition,
what protect the motor and the area  where is installed. Construction of fire- resistant motors prevent spreading of ignition, but do not

protect the motor against damage. Motors II 2G Ex e II class T3 are adapted for operating in direct area of zone 0, in places around petrol pumps

and liquid gas LPG, by draining valves, depressurization valves in production areas or using of flammable liquids for example for washing,

cleaning, painting, gluing in areas of pouring, mixing, drying, and others activities which can result rising explosive mixture gas with air.

     Motors for dust atmosphere 2D or 3D are designed to protect against dust and maximum temperature of any outside part not exceed

125 degree of Centigrade. The motors are called equipments protected by housing and according to the newest European Norms are marked
by symbol “tD”. In the motor symbol are additionally shown test conditions letter “A” which means that the maximum thickness of  dust layer is 5 mm and explosive zone for example 21. To avoid arising of electrostatic discharges could make dust ignition eliminated danger materials for example instead
of plastic fans ( standard) used aluminium fan.
Motors 2D are obligatorily equipped in thermal protection type PTC. Correctly using of these protections prevents
explosion even in failures of equipment.The equipments protected by dust-tight housing are adapted for operating in places where periodically

can occur cloud of combustible dust because of taking off the dust, splitting of production equipments, equipments adapted for sucking off

and transport dust , by storing, granulating, crushing, briquetting etc.. Above situations can appear in chemical industry, food,  pharmaceutical and woodworking.

     Indukta S.A. has necessary rights for production and commerce of three- phase induction explosion- proof increased safety motors in range

shown in enclosed table. Offered motors are adapted for operating in environment temperature from -20 to +40 degrees of Centigrade and
are used for wide range of voltages from 190V to 690V and frequency 50 HZ.

RANGE OF PRODUCTION