three phase and single phase asynchronous electric
Contents
1. PROBLEM REASON SOLUTION The motor does not start you cannot Interruption of the line lack of Check all protective elements power lines and hear the typical starting noise voltage terminals The motor does not start under load Too high resistant torque Check the machine coupled to the motor uncouple but the magnetic hiss is regular the motor and see if it work properly at no load The ammeter in the stator circuit Possible rotor fault see a specialist reports periodic variations The motor warms up already during Insufficient cooling due to the Clean the ventilation channels the idle running ventilation channels clogged The motor gets too hot under load Too high load Check the coupling and the correct tension in the belts Too low or too high voltage Measure the current Friction between rotor and stator Contact the manufacturer The motor makes abnormal noise Mechanical or electrical factors If defects concern the electrical part the noises disappear when disconnecting the motor in case of defects on the mechanical part noises often decrease with the reduction of speed Contact the manufacturer ENGLISH 5 2012 012. IEC EN 60204 1 Connect semiconductor temperature detectors to the release device in accordance with the wiring diagram Continuity test if necessary to be carried out by means of a measuring bridge only max 2 5 V In order to achieve full thermal protection an additional thermally delayed overload protection must be installed Fig 7 Normally fuses alone protect only the supply system not the motor Maintenance A Before carrying out any work on the motor disconnect it and secure it against restarting Caution danger of accidents Take care not to come in contact with moving parts ENGLISH 3 2012 01 Cleaning Depending on the local conditions air passages should be cleaned regularly Maintenance of bearings Motors made by Moratto S r l have ball bearings with permanent lubrication Under normal operating conditions motors can be operated for about 20 000 hours without maintenance However the maximum period of maintenance free operation is four years If necessary replace the bearings Fill the spaces between the balls and the roller tracks as well as the grease compartments half with grease Coat shaft bushings in the bearing caps or end shields with a thin layer of grease Permanently greased bearings 2RS and 2Z bearings cannot be washed and regreased Such bearings must therefore be replaced To dismantle the bearings use pressing screws or other appropriate devices Repair instructions
3. Any repair work within the guarantee period is subject to the approval of the motor manufacturer General It is strongly recommended that only original spares be used for motor repairs Instructions for storage of motors For prolonged storage of electric motors e g spare motors the following precautions must be observed Place Make sure that they are kept in a dry and dust free place with minimum vibration Speed eff lt 0 2 mm s damage to stalled bearings Ambient temperature 10 C to 40 C relative humidity lt 50 Where pulleys half couplings etc are already mounted on the shaft extension fit the locking device or place the motor on vibration dampers if possible A Use dampers and locking device also for any future transport of the motor Check before commissioning Bearings Before commissioning a motor that has been stored for more than 4 years check the bearings For motors without regreasing device grease has to be renewed or bearings have to be changed after 2 years at the latest Insulation resistance A Before commissioning check the insulation resistance With values lt 1kW per Volt rated voltage dry the winding Check the insulation resistance of each phase against earth by means of a hand driven generator max 630 V DC until the measured value is constant The insulation resistance of new windings is above 10 MQ The resistance can be lowered considerably by moisture If at room temperature
4. EE IEC EN 60204 IEC EN 60335 Inappropriate use may cause major damage to persons and objects Should additional data be required you should immediately consult the manufacturer or an authorized service workshop A All work on electrical connections to the motors and generators should only be carried out by qualified personnel General information Scope These instructions refer to surface ventilated three phase and AC low voltage cage induction motors and generators IP 54 and IP 55 to EN 60034 and IEC 34 5 Higher degrees of protection are indicated on the rating plate These low voltage machines are intended for industrial installations They comply with the harmonized standards EN 60034 Observe any possible special prescriptions for their use Air cooled low voltage machines are designed for operation at altitudes lt 1000 m above sea level and at ambient temperatures between 20 C and 40 C Exceptions are stated on the rating plate Observe especially different indications on the rating plate The conditions at the place of use must coincide A with all the data of the rating plate The low voltage machines are components of a machine according to the Directive Machines 2006 42 CE The commissioning of this machine is forbidden until conformity of the final product with this directive is proved observe EN 60204 1 ENGLISH 1 2012 01 Transport Should any damage be observed after delivery of the low voltage
5. MORATTO S R L Electrical Machinery 31030 PERO DI BREDA Treviso Italy Via A Volta 2 Tel 390422904032 fax 39042290363 www moratto it moratto moratto it THREE PHASE AND SINGLE PHASE ASYNCHRONOUS ELECTRIC MOTORS OPERATION AND MAINTENANCE BOOKLET Rev 2012 01 WARNINGS This operation and maintenance booklet contains important information on safety measures and special instructions about transport installation use and maintenance of three and single phase electric motors branded ELMOR Read these Operating Instructions before you transport install commission maintain or repair industrial motors These symbols will draw your attention to the safety measures and additional instructions given in these Operating Instructions A Special instructions regarding safety and warranty Danger For reasons of protection of persons and objects all the safety measures and additional instructions given in these Operating Instructions must be strictly complied with CAUTION DO NOT OPERATE THE MOTOR IF IT HAS UNDERGONE DAMAGES IN TRANSIT OR IF IT HAS UNDERGONE VISIBLE DAMAGES CONTACT THE DEALER OR THE MANUFACTURER FOR ANY CLARIFICATION Low voltage machines have dangerous rotating and conductive parts as well as possibly hot surfaces All transport installation commissioning maintenance and repair works have to be carried out exclusively by qualified personnel and checked by responsible experts observe 73 23 C
6. catalogue In no way the ball bearings should suffer pressure or strokes in transit installation and during motor operation Mechanical Substructure Make sure that the feet or flanges are safely fixed and rest positively on their entire surface Check also the exact alignment with direct coupling A All motor feet must rest positively on their entire surface to avoid distortion of the motor frame Mechanical Alignment When the motor is connected to the driven machine via a coupling the shafts must be aligned radially and axially to each other The correct alignment of the transmission must be verified after a reasonable period of operation of the machine when the motor is warm A Do not disable the safety devices even during testing If in doubt turn the motor off Electrical Voltage and winding connection The admissible fluctuation between rated voltage and supply voltage is 5 for rated frequency 2 is allowed Observe different connection indications and data on the rating plate as well as the connection diagram in the terminal box Electrical Connection Choose cable cross sections in accordance with the rated current Not used cable entries must be closed by compression glands Norma IEC EN 60204 1 Work should only be carried out by qualified personnel always with the machine out of operation disconnected and previously secured against starting This is also valid for auxiliary circuits e g heaters Make
7. machine at its destination these should be notified immediately to the transport company avoid commissioning Lifting eyes Lift motors only on lifting eyes provided Do not add any load to the motor Lifting eyes are designed for the motor mass only Should it be necessary use appropriate cable guides Ventilation The distance between air intake of the motor and walls or other machinery must be at least 1 4 of the diameter of the air intake opening Cooling air flows from the non drive end towards the drive end Air leaving the motor must not be drawn in again by the fan Keep air inlets and outlets clean For vertical shaft up designs suitable protection must be provided at the mounting end so that no foreign A matter can enter the ventilation hole Such protection must however not affect the cooling and air leaving the motor generator or adjacent groups must not be drawn in again Condensation drain holes Even after installation the condensation drain holes must be at the lowest point of the motor They must be kept clean Plug drain hole after each drainage Installation and commissioning Mechanical Transmission elements Use elastic couplings only rigid couplings require a special bearing design When using transmission elements which provoke radial or axial shaft loads during operation e g pulleys A gearwheels etc take care that the permissible loads are not exceeded Relevant data are given in the respective technical
8. ndicated on the rating plate by an arrow For the desired direction of rotation the stator winding is connected as follows L1 L2 L3 connection Direction of rotation from the contro side U1 V1 W1 Clockwise W1 V1 U1 Counterclockwise Electrical Reversing the direction of rotation The direction of rotation of the motor can be reversed as shown in the following table Verify the absence of power supply before proceeding to the change the direction of rotation Mode of starting and winding Measures Direct on line starting and pole changing motors with Exchange two supply cable conductors on the terminal board separate windings of the motor Star delta starting and pole changing motors with Exchange two supply cable conductors at the incoming Dahlander winding supply to the contactor combination Electrical Test To check the direction of rotation switch the properly connected but uncoupled motor quickly ON OFF Electrical Y A Starting In order to avoid excessive transient currents and torques before changing over from Y to A wait until the starting current of the Y stage has died down or run up has concluded e g change over when rated speed is reached Electrical Motor protection Unless specifically requested during the purchase motors have no protection against overcurrent overtemperature and overspeed These are mandatory and charged to the user unless otherwise agreed
9. otor does not reach the One phase is discontinued after Check the supply line correct speed starting Loss of speed buzz The ammeter in the stator circuit Possible rotor fault see a specialist reports periodic variations The motor warms up already during Wiring error for instance Y Check and fix the connections according to the the idle running connection instead of delta diagram connection Too high voltage Measure line voltage and no load current Insufficient cooling due to the Clean the ventilation channels ventilation channels clogged The motor gets too hot under load Too high load Measure current Too low or too high voltage Measure both voltage and current One phase is discontinued Check line voltage Find the discontinued phase Friction between rotor and stator Check the coupling and the correct tension in the belts The motor makes abnormal noise Mechanical or electrical factors If defects concern the electrical part the noises disappear when disconnecting the motor in case of defects on the mechanical part noises often decrease with the reduction of speed Contact the manufacturer The pole changing motor rotates Wiring error Check and fix the connections according to the with a wrong number of revolutions diagram The pole changing motor rotates One or more lines or connections Check the connections between terminals and line with a single speed only between terminals and pole changer are defective or broken Single speed motor
10. sure that there is no voltage The supply cables must be connected with special care to ensure permanent and reliable contact without loose cable ends use suitable terminals for the connection cables Supply cables must be stress relieved so that no cantilever loads are exerted on the terminals ENGLISH 2 2012 01 Ensure a good connection of the protective conductor The minimum safety distances between conductors and between those and earth should not exceed the following values lt 550 V gt 8mm lt 750 V gt 10mm lt 1000 V 14mm Make sure that no foreign matter is left in the terminal box and that it is clean and dry Cable entries which are not used and the terminal box itself have to be sealed dust and water tight In order to maintain the degree of protection always make sure that the original gaskets are used when closing the terminal box Connect protective conductor here If the power supply cable is damaged it must be replaced by the manufacturer or its service agent or a similarly qualified person in order to prevent the risk Electrical Starting Before running the test of the motor without transmission elements lock the key keys against the screening and check that the motor is securely fixed Before the start up of the brake motors make sure that the brake is working properly Electrical Direction of rotation Normally the motors are suitable for both directions of rotation Exceptions are i
11. the resistance is below 0 5 MW the winding must be dried In this case the winding temperature must not exceed 80 C For drying connect the space heater or another heating device or apply an AC voltage of 5 or 6 connect in delta of the rated motor voltage to terminals U1 and V1 Repeat the measurement The motor can be put into operation when the resistance is above 0 5 MQ Insulation resistance is temperature dependent i e if the temperature is increased decreased by 10 K the resistance value is halved doubled respectively Wiring diagrams THREE PHASE SINGLE SPEED SINGLE PHASE A N B Double voltage motors w2 u2 v2 w2 u2 v2 es V 230 400 Wiring A 400V l TI Wiring B 230V Visit www moratto it for more information ENGLISH 4 2012 01 Troubleshooting Three phase motor PROBLEM REASON SOLUTION hear the typical starting noise discontinued lack of voltage terminals The motor does not start you hear a One phase is discontinued Locate the interrupted phase check the fuses loud buzzing replace the damaged ones Friction between rotor and stator Check the ball bearings check the coupling and the correct tension in the belts The motor does not start under load Too high resistant torque Check the machine coupled to the motor uncouple but the magnetic hiss is regular the motor and see if it work properly at no load Too low voltage Measure line voltage The m
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