Three Phase Squirrel Cage Induction Motors MA - A4 - B4 - B5 SERIES 63 - 400 SIZES TECHNICAL CATALOGUE

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. Our products are backed by an organisation of skilled people dedicated to providing the high standard of design, sales, service and technical support demanded by our customers. Our ability to offer flexible and rapid solutions is an integral part of achieving MarelliMotori’s goal of Total Customer Satisfaction....

CONTENTS Page PRODUCT CODE STRUCTURE 4 BALANCING AND VIBRATION GRADES 10 AXIAL FORCES - HORIZONTAL MOUNTING 14 AXIAL FORCES - VERTICAL MOUNTING 15 CONSTRUCTION FOR HIGH RADIAL LOADS 17 MOTORS FOR VARIABLE SPEED APPLICATIO 25 STANDARD AND SPECIAL TESTS 27 DATA TABLES - SINGLE SPEED DATA TABLES - DOUBLE SPEED PART NAME

PRODUCT CODE STRUCTURE MarelliMotori products are identified by a 13 digit code shown on the namaplate. The code is constructed as follows. Single Polarity Industrial Applications Double Polarity Industrial Applications Double Polarity plan PAM Single Polarity Marine Applications Double Polarity Marine Applications Single Polarity Self Ventilated for Inverter Application Single Polarity Rorced Ventilation for Inverter Application Single Polarity EEx-e Execution (i) Valid only for 355400 series Option Code See page 47 S: Short housing M: Medium Housing L: Long Housing Special Mounting

RATING PLATES All motors in standard execution up to frame size 250 are supplied wilh aluminium identification plates, however stainiess steel plates may be supplied depending on special execution. Frame sizes 280 and above are supplied with stainless steel identification plates. All identification plates are laser engraved with data as shown in the following standard typologies. Motors subject to efficiency classification "EFF" have the correspondent band label on the nameplate All motors supplied wilh regreasing systems have regreasing data shown on the main nameplate. Frame size Stator core...

STANDARDS Title RATING AND PERFORMANCE METHODS FOR DETERMINING LOSSES AND EFFICIENCY CLASSIFICATION OF DEGREES OF PROTECTION (IP CODE) METHODS OF COOLING (IC CODE) CLASSIFICATION OF TYPE OF CONSTRUCTION AND MOUNTING ARRANGEMENT (IM CODE) TERMINAL MARKINGS AND DIRECTION OF ROTATION NOISE LIMITS BUILT-IN THERMAL PROTECTION STARTING PERFORMANCE OF ROTATING ELECTRICAL MACHINES MECHANICAL VIBRATION STANDARD VOLTAGES STANDARD DIMENSIONS AND OUTPUTS DIMENSIONS AND OUTPUTS FOR ELECTRICAL MACHINES International Standard National Standard CE MARK The electric motors described in this catalogue are designed...

PROTECTIVE TREATMENT EXTERNAL SURFACES The standard painting process consists of epoxy vinylpolyurethane paint: of a thickness used to ensure an optimum environmental resistance. Standard finishing paint colour is RAL 5010. 930 A special painting process, consisting of epoxy vinyl paint followed by polyacrilic point is available on request This process is particularly recommended for: • Environments where acids or basic liquids are present; • Outdoor installations where salt is present; • Marine applications, • Environments where anhydridic gases are present. 919 Other RAL and MUNSELL colours...

MOUNTINGS AND POSITIONS Motors are supplied according to type of construction B3, B5, B3B5, B14, B3B14 and V1 compatible with mounting the arrangements shown in table below as defined in IEC-60034-7. Nameplates are marked with the abovementioned type of construction. Code I (Simplified) Mounting code Type of shaft extension (1-9) Mounting arrangement 1) Motors with feet 2) Flanged Motors: unthreaded through holes 3) Flanged Motors: threaded dead holes Frame size Standard X Consult MarelliMotori Motor from frame size 100 and above are supplied with lifting eye bolts displaced according to type...

COOLING The designation of cooling method is given by IC (International Cooling) code, according to IEC 60034-6. Circuit Arrangement Method of fluid circulation for the primary cooling fluid. IC Method of fluid circulation for the secondary cooling fluid. Motors in standard execution of frame sizes from 63 to 400 are supplied wilh IC 411 cooling systems, incorporating a bi-directional fan. All frame sizes can be supplied with cooling system IC 418 on request. 177 Motors with frame sizes from 90 to 400 can be supplied with cooling system IC 416 on request. Self ventilating motor. Enclosed machine....

BALANCING AND VIBRATION GRADES The motors are dynamically balance with a half key applied to the shaft extension in accordance with standard IEC 60034-14 to vibration severity grade normal (A) in standard execution. The following table indicates the maximum vibration grades with respect to varying shaft heights. Large vibrations may occur on motors installed at site, due to various factors such as unsuitable foundations or reaction caused by the driven load. In such cases checks should also be carried out on each element of the installation. 133 Motors can be supplied with a special (B) vibration...

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 lifetime of the grease (mainly on double screen bearings), ❏ the environmental conditions and working temperature, ❏ the external loads and vibrations. The motors ≤ 132 frame size have double screen prelubricated ball bearings. The correspondent grease life under normal operating conditions for a motor with...

BEARINGS FOR STANDARD MOTORS On request, motors can be supplied with ball bearings on both sides. In these cases the bearings are axially preloaded, as shown D-end (4 - 8 Poles) N-end D-end (4 - 8 Poles) N-end Ball bearings Ball bearings