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Summary of Contents for WEG MAF
- Page 1 Low and high voltage three phase induction motors M line – Slip ring rotor – Horizontal mounting - Fixed brush holder Installation, Operation and Maintenance Manual...
- Page 3 Installation, Operation and Maintenance Manual Models: MAF, MAI, MAW, MAL Document number: 14583796 Language: English Revision: 05 July 2024...
- Page 5 Dear Customer, Thank you for purchasing a WEG motor. Our products are developed with the highest standards of quality and efficiency which ensures outstanding performance. Since electric motors play a major role in the comfort and well-being of mankind, it must be...
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Page 7: Table Of Contents
TABLE OF CONTENTS INTRODUCTION ......................11 SAFETY WARNINGS IN THE MANUAL ..................11 GENERAL INSTRUCTIONS ..................12 QUALIFIED PERSONNEL ......................12 SAFETY INSTRUCTIONS ......................12 STANDARDS ..........................12 ENVIRONMENTAL CONDITIONS ....................12 OPERATING CONDITIONS ......................13 VOLTAGE AND FREQUENCY ...................... 13 RECEIVING, HANDLING AND STORAGE .............. - Page 8 STARTING WITH REDUCED CURRENT ..................34 STARTING WITH RHEOSTAT ...................... 34 COMMISSIONING ...................... 35 PRELIMINARY INSPECTION ....................... 35 FIRST STARTING ......................... 35 6.2.1 Starting procedure ..........................35 OPERATION ..........................36 6.3.1 General ............................36 6.3.2 Load Condition ..........................36 6.3.3 Temperatures ............................
- Page 9 14 WARRANTY TERM ..................... 57...
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Page 11: Introduction
If any additional explanation about motors with major special features is necessary, consult WEG. All procedures and standards contained in this manual must be observed in order to ensure proper operation of the motor and the safety of the personnel involved in its operation. -
Page 12: General Instructions
2 GENERAL INSTRUCTIONS All the personnel involved with the assembly, operation or maintenance of electrical installations must be permanently informed and updated on the standards and safety instructions that guide the job and are advised to strictly comply with them. Before beginning any job, the person in charge must make sure that all points have been duly observed and warn the respective personnel about the danger inherent to the task to be performed. -
Page 13: Operating Conditions
2.5 OPERATING CONDITIONS In order for the product warranty to be valid, the motor must be operated according to nominal data indicated on its nameplate, observing all applicable standards and information contained in this manual. 2.6 VOLTAGE AND FREQUENCY It is very important to ensure a proper power supply for the motor. -
Page 14: Receiving, Handling And Storage
▪ documented and reported immediately to the The lifting lugs on the heat exchanger, end carrier, the insurer and WEG. The non- shields, bearings, radiator, terminal box, communication of this damage will void the etc. are designed to handle these warranty. -
Page 15: Extended Storage
If any of these requirements is not met in the storage site, aggressive agents, etc. WEG suggests that additional protections be added to the The empty spaces inside the motor – such as rolling motor package during the storage period, as follows: bearings, terminal boxes, and windings –... - Page 16 ▪ It is recommended that a signal be installed near the motor Before putting the motor into operation, the rolling to indicate that the space heaters are energized. bearings must be re-lubricated. ▪ If the motor remains stored for a period exceeding 2 3.3.3.2 Insulation resistance years, the rolling bearings must be disassembled,...
- Page 17 WEG recommends that, every 3 years of storage, the perfect sealing; stored motor be sent to a WEG Authorized Repair Shop or ▪ Install a pressure gauge on one of the blind flanges and to WEG own factory, in order to perform a complete a globe valve on the other;...
- Page 18 3.3.3.12 Maintenance plan during storage During the storage period, the motor maintenance must be performed and recorded according to the plan described in Table 3.1. Table 3.1: Storage plan Before Monthly Notes months months years start-up STORAGE LOCATION Inspect the cleanliness conditions Inspect the humidity and temperature conditions Inspect for insect infestation signs...
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Page 19: Preparation For Commissioning
Reassemble the sleeve Contact WEG to perform this procedure. 3.3.4.3 Bearing lubrication Use the lubricant specified for bearing lubrication. Information on the bearings and lubricants are indicated on the bearing nameplates, and the lubrication must be done as described in section 7.11 of this manual, always... -
Page 20: Installation
In order to operate the motor in the The frame must be grounded and the three phases of direction opposite to the specified, consult the stator winding must remain connected to the neutral WEG. point, according to Figure4.1. 4.4 INSULATION RESISTANCE 4.4.1 Safety Instructions M... -
Page 21: Measurement On The Rotor Winding
M Figure4.2: Connection of the megohmmeter to separate phases If the total winding measurement presents a value below the recommended, the neutral connections must be opened and the insulation resistance of each phase Figure4.3: Insulation resistance correction factor due to must be measured separately. -
Page 22: Thermal Protections
The ambient temperature must not exceed 40 °C, in The motor protection devices are listed in accordance with NBR IEC60034-1 standard. Above this the WEG drawing – Connection diagram. temperature, the working conditions are considered Not using these devices is the sole... -
Page 23: Water Leak Sensor
4.5.1.3 Temperature and ohmic resistance of the PT100 thermoresistance Table 4.5 shows the temperature as a function of the ohmic resistance measured across PT100 RTDs. Table 4.5: Temperature X Resistance (Pt100) º C 100.00 100.39 100.78 101.17 101.56 101.95 102.34 102.73... -
Page 24: Cooling
4.6 COOLING The motor cooling system type may vary according to its application. Only the correct installation of the motor and of the cooling system can ensure its continuous operation without overheating. ATTENTION The protection devices of the cooling system must be monitored periodically. The air and/or water inlets and outlets must not be obstructed, because this could cause overheating and even lead to the motor burnout. -
Page 25: Air-Water Heat Exchange Cooling
Motors with a single rotation direction must only rotate in the indicated direction, since fans and other devices are unidirectional. In order to operate the motor in the rotation direction opposite to the specified, consult WEG. -
Page 26: Grounding
ATTENTION Before making the connections between the motor and the power supply, it is necessary to perform a careful measurement of the winding insulation resistance. In order to connect the motor main power supply cables, unscrew the cover of the stator terminal box, cut the sealing rings (standard motors without cable gland) according to the diameter of the cables to be used and insert the cables in the sealing rings. -
Page 27: Motor Connection Diagrams
4.7.3 Motor connection diagrams 4.7.3.1 Stator connection diagrams according to IEC60034-8 The following connection diagrams show the terminal identification in the terminal box and the possible connections for the motors. 3 TERMINALS 6 TERMINALS 6 TERMINALS - DAHLANDER Δ Δ Δ... -
Page 28: Rotation Direction
Motors with a single rotation direction, as indicated on the nameplate and on sign plate affixed to the frame, have unidirectional fan and must be operated only in the specified rotation direction. In order to invert the rotation direction of unidirectional motors, consult WEG. -
Page 29: Mechanical Aspects
4.8.3 Base types 4.8 MECHANICAL ASPECTS 4.8.3.1 Concrete base 4.8.1 Foundations Concrete bases are the most widely used for the ▪ The foundation or structure where the motor will be installation of these motors. installed must be sufficiently rigid, flat, free of The type and size of the foundation, bolts and external vibration and capable to withstand the anchoring plates depend on the motor size and type. -
Page 30: Anchor Plate Set
The motor leveling must be checked with proper equipment. NOTES When WEG supplies the anchor plate for NOTE fastening and aligning the motor, the At least 75% of the motor foot support dimensional and installation details of the surfaces must rest on the motor base. -
Page 31: Doweling
Half of the maximum difference among the dial gauge measurements in a complete rotation represents the maximum angular misalignment found. The misalignment in a complete shaft rotation, with rigid or semi flexible coupling, cannot exceed 0.03 mm. When flexible couplings are used, greater values than those indicated above are acceptable, provided that Radial measurement they do not exceed the value allowed by the coupling... - Page 32 (unless otherwise specified by Figure4.15: Belt drive coupling commercial agreement). WEG is not liable for damages to the motor, When a reduction or increase in speed is required, the associated equipment and installation belt transmission is the most indicated.
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Page 33: Hydraulic Unit
ATTENTION ATTENTION Motors equipped with sleeve bearings The sleeve bearings used on this motor must operate with direct coupling to the were not designed to withstand constant driven machine or by means of a gear axial loads; therefore, under no box. -
Page 34: Starting
5 STARTING The first condition simulates the case in which the first 5.1 DIRECT ON-LINE STARTING motor start is aborted, for instance, by the trip of the motor protection, when a second motor start is It is the simplest and most economically feasible permitted right afterwards. -
Page 35: Commissioning
WEG. 19. Check the starting rheostat, the machine circuit breaker and the connection of these equipment with the motor. -
Page 36: Operation
▪ of brushes. In case of questions, consult In order to control the motor operation, it is WEG. recommended to install thermometers at the radiator air and water inlets and outlets and record these temperatures at certain time intervals;... -
Page 37: Vibration
NDE and DE bearings, in the vertical, horizontal and DANGER axial directions. When the customer sends the half coupling to WEG, the motor is balanced with the half Even after switching the motor off, while the coupling mounted on the shaft. Otherwise, according to... -
Page 38: Maintenance
If the motor requires reconditioning or A thin, light film can be considered to indicate - replacement of any damaged part, consult moderate friction - good contact - adequate temperature WEG. in the slip ring. This is an "ideal" film. 7.1.1 Brushes and slip rings Check the wear of the brushes and its surface condition. -
Page 39: General Cleaning
The brush compartment must be kept clean, without recommendations of the "Maintenance Plan" of this dust accumulation from the wear of the electric manual. If reimpregnation is necessary, consult WEG. brushes; The windings may be cleaned with an industrial vacuum ▪... -
Page 40: Inspections After Cleaning
If any layer of resin on the windings is damaged during the radiator tubes are found during the cleaning, they cleaning or inspection, such parts must be corrected with must be repaired; adequate material (in this case, consult WEG). 5. Reassemble the heads, replacing the gaskets, if necessary. 7.4.5... -
Page 41: Brush Holder And Brushes
SILFUSE 4360 entire set can be replaced normally without consulting Other self-fusing silicone tapes may also WEG. Pay attention to the preparation of the carbon be applied but should have similar brushes regarding their seating on the slip ring. characteristics of the reported tapes. -
Page 42: Shaft Grounding Device
The brush adaptation 7.11.1.1 Instructions for lubrication must be made by consulting WEG. The lubrication system was designed in such a way that during the lubrication of the rolling bearings, all the old 7.10 SHAFT GROUNDING DEVICE... - Page 43 1800 6316 3000 3000 1800 1800 1800 ATTENTION 6317 3000 3000 1800 1800 1800 WEG does not recommend the use of 6319 1800 1800 1800 1800 1800 greases different from the motor original 6320 1800 1800 1800 1800 1800 6322...
- Page 44 9. Grease collecting drawer 10. Rolling bearing 11. Grease nipple NOTE 12. Thermal protector WEG is not liable for the grease change or 13. External closing disc for any damages arising from this change. Before disassembling: ▪ Remove the extension tubes from the grease inlet and outlet;...
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Page 45: Oil-Lubricated Rolling Bearing
▪ The oil selected for the application must have the Figure 7.7: Outer bearing cap proper viscosity for the bearing operating temperature. The type of oil recommended by WEG already 7.11.2 Oil-lubricated rolling bearing considers these criteria; ▪ Insufficient quantity of oil may damage the bearing;... -
Page 46: Bearing Replacement
7.11.2.5 Bearing disassembly 7.11.2.6 Bearing assembly ▪ Clean the rolling bearing and the oil tanks thoroughly, and inspect all the parts before the bearing assembly. ▪ Make sure the rolling bearing contact surfaces are smooth and free of signs of scratches or corrosion; ▪... - Page 47 If the equipment During the first start, it is necessary to stay alert for does not have oil outlet pipes, contact WEG for guidance unusual vibrations or noises. If the bearing does not on how to ensure the proper oil level at the outlet.
- Page 48 ▪ Remove the bolts (6) that join the halves of the 7.11.4.7 Sleeve bearing maintenance housing (2 and 5); ▪ Use the lifting lugs (9) to lift the upper half of the The sleeve bearing maintenance includes: ▪ housing (9), totally disassembling it from the lower Periodic checking of the oil level and its lubricating halves of the outer sealing (11), from the labyrinth conditions;...
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Page 49: Bearing Protection
▪ Carefully rotate the lower half of the bearing shell (12) 7.11.5 Bearing protection over the shaft and remove it; ▪ 7.11.5.1 Protection settings Remove the screws (4) and remove the lower half of the housing (2); ▪ Undock the screws (8) and the machine seal (7); ATTENTION ▪... -
Page 50: Motor Disassembly And Assembly
All the repair, disassembly and assembly services must be performed only by properly qualified and trained professionals; otherwise, equipment damage and personal injury may occur. If any further explanations are necessary, consult WEG. The disassembly and assembly sequences depend on the motor model. -
Page 51: Tightening Torque
Table 8.1 and Table 8.2 shows the tightening torques of 8.5.1 Necessary spare parts the screws recommended for assembling the motor. WEG recommends that the necessary spare parts listed Table 8.1: Screw tightening torque for metal/metal parts in Table 8.3 be kept in stock for the maintenance Material /... -
Page 52: Maintenance Plan
9 MAINTENANCE PLAN The maintenance plan described in Table 9.1 is only referential, and the intervals between each maintenance intervention may vary according to the motor location and operating conditions. For the associated equipment, such as the water supply unit or control and protection system, it is necessary to refer to their specific manuals. -
Page 53: Abnormalities, Causes And Solutions
10 ABNORMALITIES, CAUSES AND SOLUTIONS NOTE The instructions of Table 10.1 present only a basic list of abnormalities, causes and corrective actions. In case of questions, consult WEG. Table 10.1: Basic list of abnormalities, causes and corrective actions ABNORMALITY POSSIBLE CAUSES CORRECTION ▪... - Page 54 ABNORMALITY POSSIBLE CAUSES CORRECTION ▪ ▪ Fans with inverted rotation direction Correct the rotation direction of the fans ▪ ▪ Insufficient cooling due to dirty air channels Open and clean the air passage channels ▪ Measure the stator current ▪ ▪...
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Page 55: Declaration Of Conformity
11 DECLARATION OF CONFORMITY... -
Page 56: Environmental Information
These materials are recyclable or reusable and must be properly disposed according to the current regulations of each country. All the wood used in the packaging of WEG motors comes from reforestation and receives anti-fungal treatment. 12.2 PRODUCT... -
Page 57: Warranty Term
The repair and/or replacement of parts or components, when effected by WEG within the Warranty period do not give Warranty extension, unless otherwise expressed in writing by WEG. This constitutes WEG's only warranty in connection with this sale and is in lieu of all other warranties, expressed or implied, written or oral. - Page 58 NOTES...
- Page 59 +55 47 3276.4000 energia@weg.net Jaraguá do Sul - SC - Brazil Cod. 14583796 | Rev. 05 | Date (m/y): 07/2024...
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