operating manual three-phase squirrelcage induction motors
Contents
1. At least Imm 1 5mm of space must be kept between the coupling s halves 1mm 200 280 1 5mm 315 la Figure 1 Concentricity of the motor s shaft and the driven appliance Peak load on the shaft neck with transverse and axial force may not exceed the limit values specified in the data sheet In belt drives avoid an excessive belt pull it reduced the life of the bearings and overloads the shaft 5 CONNECTION TO A POWER NETWORK Before connecting the motor the power network compare the rating plate data with the network parameters Markings of the terminals and the connection of the winding is shown in the table containing the connection layout located on the cover of the terminal box Motor starting can be performed by direct connecting to the network voltage or after removal of the connectors on terminals using the star triangle switch Thermal protection of stator winding brought out to terminals 1 2 on the terminal strip must be connected with the corresponding input terminals of the resistance relay ATTENTION When checking the temperature sensor circuits measured voltage should be at max 1 5 V per thermistor Cantoni i Motors with winding heaters feature heating tape built into them on the front of the stator winding with outlets connected to C C terminals on the terminal block see the table with connection layout Heating tapes should be powered with 230Y current only when the motor is stopped During2. Table no 2 Critical intensity of vibrations mm s of motors according to PN EN 60034 14 Degree Height of the shaft 132 lt H lt 280 H gt 280 of vibration Method of mounting mm s mm s Free suspension 2 2 2 8 A Rigid mounting 1 8 2 3 B Free suspension 1 1 1 8 Rigid mounting 0 9 1 5 ATTENTION A standard requirements B lowered vibration level A mayor inspection of the motor includes the following actions disassembly of the motor removal of the rotor inspection of the stator particularly the condition of the winding measuring the resistance of the insulation of the stator winding inspection of the rotor inspection of bearings replacement if needed replacement of grease inspection of the start up protection and control instruments All defects noticed during the inspection should be removed and worn out parts replaced with new ones It is recommended to renew the protective layers During the mayor inspection and eventual repairs it is important to maintain the technical requirements defined in the standard indicated on the motor s rating plate It is recommended to perform the partial test in accordance with the standard PN E 06755 1 A Cantoni 10 DISASSEMBLY AND ASSEMBLY OF THE MOTOR In order to remove the rotor from the stator do the following a d on the drive end D remove the key 13 from the shaft remove the spring clip which protec
3. be connected at standstill by connecting 230V to the terminals marked C C If the motor has no heating elements the winding can be dried using 24V current connected to any two electric terminals Drying the stator in e g a drier is permitted The temperature during the drying process cannot exceed 80 C The motor should be dried until insulation resistance reaches its required value Cantoni i check the quality of grease in the bearings if the motor was stored for more than 2 years replace grease using lithium grease Renolit by FUCHS or equivalent When changing the kind of grease used clean the bearings with petrol and dry The motor should be installed in such a way that it is easy to access it for inspection and maintenance A balanced flexible coupling or a grooved belt pulley should be placed on the motor s shaft neck In order to do this wash off the protective paint from the shaft neck cover the cleaned shaft neck with grease or oil place the coupling heated to about 85 C or the belt pulley on the shaft neck with the help of an appropriate washer and M20 screw using the threaded opening in the last shaft of the neck or using a different appropriate tool When installing the coupling or belt pulley on the shaft prevent it from hitting motor elements which can damage the motor s bearings After the installation the motor shaft s axis and the driven appliance must be concentric to at least 0 1mm
4. work and during inspection heating tapes should be disconnected from power supply Each motor in the terminal box has a suitably marked neutral terminal and grounding terminal on the casing foot or blade flange The engine should be neutralized and grounded in accordance with regulations After connecting all power supply and protection cables check whether all terminals are tightened securely check the box s seals and install the terminal box cover 6 STARTING THE MOTOR Before starting the motor check the condition of insulation of motor winding and temperature sensor circuits when the measured insulation resistance is too low the winding must be dried measurement of insulation resistance should be also performed in the case of longer standstill of the motor check whether a free flow of cooling air to the ventilator is provided check the electric installation correct operation of the on off switch and other supporting and securing devices check the tightness of all mounting screws reliability of the cable connection and all elements having an impact on the motor s protection rating check the quality of the grounding and neutralization check whether the appliance is ready for start up perform a test start up During the test start up you should check the supply voltage current value direction of the motor s rotation correct cooling of the motor and correct coupling with the driven
5. Cantoni i OPERATING MANUAL THREE PHASE SQUIRRELCAGE INDUCTION MOTORS since 1920 THREE PHASE INDUCTION MOTORS SURFACE COOLED WITH A SQUIRREL CAGE TYPE 2SIE 200 315 2SIEK 200 315 2SIEL 200 315 Cantoni i 1 SPECIFICATION GENERAL INFORMATION Motors with parameters according to the data sheet comply with the requirements of the IEC 60034 1 standard and IEC 60034 30 class efficiency IE2 Motor versions on mounting feet motor size 200 315 type marking 2SIE flange tvpe motor size 200 315 type marking 2SIEK on mounting feet with a flange motor size 200 315 type marking 2SIEL OPERATING CONDITIONS Voltage variance 5 Ambient temperature 30 C do 40 C Relative air humidity at 25 C 100 The inclination of the shaft axis to the level 0 90 Type of operation S1 continuous Altitude of motor installation up to 1000 m PROTECTION RATING Motors in a basic version have a protection rating IP55 acc to PN IEC 60034 5 On request motors can be made with a protection rating IP66 CASING The motor s casing body bearing brackets and the terminal box are cast in grey cast iron Ventilator cover is made of sheet steel Air intake grate has dimensions guaranteeing protection rating IP20 WINDING INSULATION Stator winding and the insulation material used correspond to the insulation class F On request motors can be made with insulation class H Thermal protection posistors is installed the
6. ION OF BEARINGS Motors have rolling bearings on the drive end and on the non drive end The bearing which sets the position of the shaft is the bearing on the non drive end The size of bearings for each motor size is given in Table No 1 The information contained in the data sheet regarding values of acceptable radial and axial forces acting on the shaft neck has been calculated at the assumed life of about 30 000 hours of work alternatively for the ball bearing and the cylindrical roller bearing on the drive end of the motor For difficult working conditions and operation with high radial force on the shaft neck the ball bearing on the drive end can be replaced with a cylindrical roller bearing of the same size Motor bearings and bearing chambers are filled with grease Adding grease is done with the help of a grease pump using grease nipples during operation as far as it is possible Before applying grease to the bearings clean the grease nipples Table 1 shows the approximate amount of grease when adding or replacing grease for different motor sizes Table no 1 number of gears 250 2 8 6315 C3 Lubrication intervals in work hours for ball bearings in electric motors working in nominal conditions in a horizontal position at ambient temperature up to 40 C e antoni Motor size 3600 3000 1800 1500 1000 1200 rev min rev min rev min rev min rev min 200 3300 200 23000 225 3000 225 22000 250 adding grease 90 uo _ i
7. appliance whether no excessive vibrations or other improprieties in the work of the motor occur the degree of warming up of engine components such as bearing brackets bearings casing correct functioning of start up devices control and protection instruments the electrical parameters of the motor and evaluate whether the correct motor type was selected Performing the above recommendations and achieving a correct operation of the motor and appliance can be regarded as acceptance of the motor after its installation 7 OPERATING THE MOTOR While the motor is in operation the following should be checked systematically correct operation of the motor correct cooling of the motor correct work of the bearings there should not be any knocking or whistling whether there are no excessive vibrations of the motor the condition of the motor s coupling with the driven appliance power input shouldn t exceed the nominal value Cantoni i The motor should be immediately switched off if any of the following occurs overheating of the casing smoke or smell of burning comes out of the motor or the installation damage to the motor s ventilator damage to the driven appliance if for any other reason further operation of the motor is incorrect or is a threat to its surroundings Restart of the motor and the device can take place after the removal of all defects 8 BEARING MOUNTING AND LUBRICAT
8. body box cover Scrap iron Cores stator and rotor Scrap steel generator sheet after removing winding with isolation and melting Al Aluminium squirrel cage Aluminium scrap after melting Winding with isolation Scrap copper removal and utilization of insulation in a specialized company Shaft sleeves steel ventilator ventilator cover connectors Scrap steel Bearings Scrap steel after removing grease grease for utilization in a specialized company Rubber parts seals rings etc Utilization in a specialized company Plastic elements terminal board terminal block ventilator Utilization in a specialized company Cantoni i CANTONI M MOTORI ELETTRICI
9. box SAFETY TERMINALS The terminal for the safety conductor is located inside the terminal box Additional external terminal for connecting an earthing cable is located on the motor s casing MOTOR DRAINAGE Motors have openings in bearing brackets for draining the inside of the motor antoni 7 ___GROUP 2 TRANSPORT AND STORAGE Motors can be transported using any roofed means of transportation without violent shaking and surges Lifting of the motors can be done only by the bolt with a lug located on the motor s casing Motors must be stored in locations where maximum relative humidity does not exceed 80 at 20 C ambient temperature is between 30 C and 40 C dust fumes and acrid vapours and other aggressive chemical fumes which can damage the insulation or casing cannot enter no vibrations occur It is important to protect processed surfaces of motors in storage from atmospheric impact by covering them with thick grease or easily removable anti corrosion paint 3 SAFE OPERATION RULES In order to avoid unfortunate accidents while operating the motor it is important to follow these rules before attempting any regulating operations inspections or repairs turn off all power supplies the motor must be installed in accordance with generally applicable rules and regulations inno event can the motor be used without the covers foreseen in its construction motor should be grounded neutralized according
10. onditions with dusting gt 800mg m or relative humidity gt 80 or in an aggressive atmosphere the periods of time between inspections indicated in Table no 2 must be decreases at least by two A minor inspection of the motor includes the following actions disconnection of all power conductors visual inspection and cleaning of the motor measuring the resistance of the insulation of the stator winding checking the tightness of all mounting and contact screws inspection of the power cable and protection cables whether the insulation has not been damaged or the surfaces of terminals are metallically clean Cantoni i checking the level of motor vibrations Vibrations of the motor coupled with a driven appliance exceeding the permissible level for the motor alone by two times should be treated as excessive and requiring further investigation driven appliance s requirements or vibration standard for the whole unit should be taken into consideration In such a case it is necessary to stop operating the motor disconnect from the drive and measure the vibrations again on an elastic foundation without the half coupling with half key If the intensity of the vibrations exceeds the critical value of required level of vibrations listed in Table no 2 the motor should be subjected to a mayor inspection A minor inspection can reveal a necessity for a further inspection of the motor s construction elements in a dismantled state
11. s installation ATTENTION Motors during the warranty period and in the post warranty period are repaired only by the manufacturer or an authorized service centre LIST OF MOTOR COMPONENTS e Cantoni The following list of motor components is included to make ordering of spare parts easier Item Part name Replacement part Comments 1 Stator z 2 Rotor p 3 Bearing bracket X 4 Collar bearing bracket X 5 JExternal bearing cover X 6 jlnternal bearing cover X Labyrinth sleeve 7 Sleeve with a ring X Inner ring 9 Bearing standard part 10 Grease nipple tube connector standard part 11 External ventilator X 12 jVentilator cover X 13 Shaft neck key standard part 15 Electric terminals terminal board X 16 Terminal box body X 17 Terminal box cover X 18 Stuffing box standard part 19 Gasket ring X 20 21 Terminal block LZ4 X 22 Safety terminal standard part 23 Rating plate Cantoni B ni ABE i TILE _ H B ETA TITER i DIE fj j D far LL fa ZI ail HZ CG S Il N j n Sa IK P Aa fal cm WN Cod Soy Cantoni i A Cantoni UTILIZATION OF MOTOR S MATERIALS AFTER THE PERIOD OF OPERATION Sub assembly part name Method of utilization casing bearing brackets and covers terminal box
12. s0 160 2700 250 15000 280___ addinggrease f 750 90 20 1500 2500 280 12500 315 adding grease fi 750 U 900 120 50 2500 315 11800 Remarks 1 Faster aging of grease with increasing temperature must be taken into account It is recommended to shorten the grease working period by half with every increase of 15 C of operating temperature of grease above 70 C 2 Lubrication intervals for motors working in an upright position should be shortened by half 3 Lubrication intervals for motors working with cylindrical roller bearings should be also shortened by half For the lubrication of bearings RENOLIT H443 HD 88 motor size200 250 RENOLIT DURAPLEX EP2 motor size 280 315 grease have been used the type of grease needed is indicated on the motor s rating plate 9 PERIODIC INSPECTIONS OF THE MOTOR In order to maintain the motor in full technical efficiency it is necessary to remove all defects noticed during operation on an ongoing basis Regardless of the above it is recommended for each working motor to be subject to periodic inspections namely minor inspection every 6 months major inspection every 10 000 hours of work but not less frequently than every three years REMARKS 1 The period between each minor inspection can be longer to a major inspection when using monitoring based on controlling the vibrations of bearings and motor s electrical parameters 2 If the motor operates in c
13. stator winding The squirrel cage is cast in aluminium Version made upon request resistance thermometers Pt100 installed in the winding heating elements motor s internal protection at standstill against condensation Cantoni 7 A GROUP Information Resistance and temperature specifications of the PTC thermistor posistor A 4000 1330 550 Resistance Temperature 20to250 20to TN 20 250 BE EE v 20 C 0 TN 20 TN 5 TN 5 TN 15 TN rated temperature of the thermistor BEARING MOUNTING For mounting the rotor bearing rolling bearings have been used Assignment of bearings to particular motor sizes is listed in Table no 1 Motors are equipped with grease nipples allowing for adding grease to the bearings On request bearing brackets adapted for installation of thermal protection and vibration sensors TERMINAL BOX The terminal box is located at the top of the motor Construction of the terminal box allows for setting the cable inlets at an angle of 90 or 180 from the original position Motors in the basic version have 6 current terminals terminal board in the terminal box and two auxiliary terminals block LZA In the version made on request motors with winding heaters have an additional terminal block in the terminal box Markings of the terminals and the diagram of connections is shown in the table containing the connection layout located on the cover of the terminal
14. to current regulations periodic inspections of the grounding neutralizing terminal s condition are necessary power cables must be properly secured from being damaged after failures short circuit or eventually overheating of the winding in order to ensure that no eventual explosion of fumes gasses trapped inside the motor occurs it is necessary before performing electrical measurements to carefully air out the motor s interior by dismantling the motor including taking out the rotor from the stator 4 MOTOR INSTALLATION Before installing the motor in place where it will be operated it is necessary to remove bearing protection if the motor has such a protection check whether the motor hasn t been damaged mechanically during transport or storage measure insulation resistance relative to the casing The insulation resistance in a cold state should be at least SMQ and in hot state at least 1000Q for every 1V of working voltage If the measured insulation resistance is lower the motor should be dried out During drying create conditions necessary to remove moisture from the winding i e at least take off the cover of the terminal box in order to make the exchange of air with the interior of the motor possible In the process of drying winding temperature in no case may exceed 80 C If the motor is produced with heaters for the winding the heating elements 55W for motor size 200 250 80W for motor size 280 should
15. ts the labyrinth sleeve remove the external bearing cover 5 with the labyrinth sleeve 7 using two screws screwed into two threaded holes in the bearing cver unscrew the screws securing the bearing bracket D 3 or 4 and remove the bracket b on the non drive end ND unscrew the grease nipple tube and connector after removing the screws remove the ventilator 12 remove the screws and pull out the bearing brackets ND 3 from the casing together with the rotor After partially pulling out the rotor from the stator using a lift carefully pull out the rotor making sure not to damage the stator winding disassembly of the bearing bracket ND remove the spring ring which protects the ventilator hub from the shaft remove the ventilator 11 using the turnbuckle remove the spring ring which protects the labyrinth sleeve from the shaft remove the external bearing cover ND 5 with the labyrinth sleeve 7 using two jack bolts M8 remove the bearing brackets ND 3 from the bearing dismantling of bearings remove the bearing using a turnbuckle MOTOR ASSEMBLY is done in the reverse order of the disassembly Bearings before being placed on the shaft should be heated to the temperature of about 80 C When installing the motor make sure that the bearing brackets are placed correctly in regard to the location of drain holes for the removal of water from condensation which should be located in the lowest part of the motor after it
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