Hazardous Areas Motors
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Motors for Hazardous Areas D5 SERIES

MarelliMotori is part of the FKI group of companies serving the world in the sectors of power generation, transmission and distribution. With over one hundred years of experience, MarelliMotori is a name synonymous with Quality and Manufacturing Excellence in the production of rotating machines. MarelliMotori is recognised as a leading supplier to the Industrial, Petrochemical and Marine sectors, offering a complete range of standard and custom solutions for low and medium voltage motors and generators. Our products are backed by an organisation of skilled people dedicated to providing the...

INDEX Page GENERAL ASPECTS OF THE ATEX DIRECTIVE 2 NOMENCLATURE OF D5 SERIES MOTORS 5 PRODUCT CODE STRUCTURE 6 BALANCING AND VIBRATION GRADES 8 TERMINAL BOX AND CABLE ENTRANCE 10 EFFICIENCY AND POWER FACTOR 15 ELECTRICAL AND MECHANICAL TOLERANCES 16 STANDARD AND SPECIAL TESTS 16 MOTORS FED BY FREQUENCY CONVERTER 17 MOTORS WITH FORCED VENTILATION 18 TECHNICAL DATA - MAINS OPERATION - GROUP MB - SINGLE SPEED 19 TECHNICAL DATA - FREQUENCY CONVERTER OPERATION 26 TECHNICAL DATA - MAINS OPERATION - GROUP MB - DOUBLE SPEED 34 TECHNICAL DATA - MAINS OPERATION - GROUP IIC - SINGLE SPEED 37 TECHNICAL...

GENERAL ASPECTS OF THE ATEX DIRECTIVE The directive 94/9/EC, better known as ATEX from the French term ATmosphères EXplosibles, is a European Community Directive, which defines the minimum health and safety requirements for apparatus intended for use in potentially dangerous environments. The directive is adopted by the European Union (EU) to facilitate free trade in the EU of products to which the Directive applies. It conforms to the safety demands in essence by: • The application of harmonised specific standards, • The EC-type examination of products from a notified body, resulting in...

The equipment belonging to group II is also specified by the nature of the atmosphere and can be arranged into the following categories: G = mixture of air and gas, vapour or mist D = mixture of air and combustible dust Gas atmospheres are further divided into three sub – groups, according to the nature of the gas: Group Examples of some substances acetone, acetic acid, methanol, ethanol, benzene, ethane, methane, propane, toluene, xylene, combustible oil, kerosene, acetaldehyde, ethylbenzene, isoprene. coke-oven gas, ethylene, ethylene oxide, ethyl ether, formic aldehyde. hydrogen,...

COMBINED TYPE OF PROTECTION “de” Combines the essential requirements of protection types “d“ and “e” (in accordance with standards EN 50018 and EN 50019) specifically: • motor enclosures with protection “d” (in accordance with standard EN50018); • terminal boxes with increased safety “e” (in accordance with standard EN 50019). COMBINED CATEGORY 2G/2D Combines the essential safety requirements: • of protection type “d” (in accordance with standard EN50018), • of the protection mode for electrical apparatus intended for use in environments with the presence of combustible dust, protection...

SUPPLEMENTARY MARKING The supplementary marking, in accordance with the 94/4/EC directive and to the EN 50014 standard, uses the following symbols: EEx d, e, I, II, T3, IP65 T xxx°C indicating that the product conforms to one or more protection types, subject to the specific European standards; type of protection; equipment group with sub-group of gas for group II temperature class (for category 2G) or maximum surface temperature (for category 2D). protection degree of the motor enclosure for category 2D. maximum surface temperature for motors of category 2D and 3D. STANDARDS Standards...

EXAMPLES OF MARKINGS The following indicates some examples of markings for D5 series motors D5X series. Specific Marking - EN 50014 General Requirements - EN 50018 Protection “d” Supplementary Marking Marking of conformity with Relevant directives Sub group of Gas Group Type of protection Conformity with standard EN 50014, … Identification of Notified body (0722 CESI) European Commission mark for Ex - product Equipment Group Equipment Category Atmosphere D5X series. - EN 50014 General requirements - EN 50018 Protection “d” - EN 50019 Increased safety ”e” - EN 50014 General requirements - EN...

MOUNTINGS AND POSITIONS Motors are supplied according to type of construction B3, B5, B3B5, B14, B3B14 and V1 compatible with the mounting arrangements shown in table below as defined in IEC 60034-7. Nameplates are marked with the abovementioned type of construction. Type of shaft extension (1-9) Mounting arrangement 71 - 112 Mounting code 1) Motors with feet 2) Flanged motors: unthreaded through holes 3) Flanged motors: threaded dead holes Standard X Consults MarelliMotori Motors from frame size 71 and above are supplied with lifting eye bolts displaced according to type of construction B3...

MATERIALS The mechanical components used in D5 series motors are made of the materials shown in the table below: Size Components Cast Iron Cast Iron (*) Aluminium Alloy Steel Thermoplastic (**) Cast Iron (*) Steel for EEx d IIC motors. (**) Metal is used for motors of M2 category. BALANCING AND VIBRATION GRADES The motors are dynamically balanced with a half key applied to the shaft extension in accordance with standard EN 60034-14 to vibration grade normal (N) in standard configuration. Larger vibrations may occur on motors installed at site, due to various factors such as unsuitable...

BEARINGS The theoretical lifetime of bearings, L10h according to ISO 281/1 standard, of standard horizontal construction motors, without external forces (radial and/or axial) is in excess of 50,000 hours. The lifetime of bearings is determined by multiple factors and specifically by: • the external loads and level of vibration • the lifetime of the grease (mainly on double screen bearings), • the environmental conditions and working temperature. Motors with frame sizes from 71 to 132 in standard configuration have double screen prelubricated ball bearings. The correspondent grease life...