Lift motors of range ATM

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Putting in to operation:

The three-phase asynchronous lift motors are intended for drives of lift machines.The three-phase asynchronous squirrel-cage motors of range ATM are equipped with degrees of protection IP10 and IP20, internal cooling IC01 and with an option of adding supplementary cooling for higher number of starts. The employed insulation system corresponds to the thermal insulation class F. Construction parts are made of cast iron. Terminal box and its cover are of aluminum alloy. In basic design, the terminal box is situated on top of the motor, with an option of turning the terminal box through 180o. Mechanical design of the frame enables the terminal box to be transferred to the right or left side of the motor. The motors feature low noise and low severity of vibration. Mounting dimensions comply with the standard IEC 60072-1

Terminology  [up]

  • Reference torque - the torque derived from synchronous speed and rated power.

  • Braking torque - the regenerative braking torque in the moment of switching from higher speed to lower one.(It is a torque value of low-speed part of the motor at over-synchronous speed.)

  • Trial run - the motor run with switched on low-speed part.

Type designation [up]

1 2 3 4 5   6 7









1-  innovation number :if not stated - with sleeve bearings    1 - with rolling-contact bearings
2 - asynchronous lift motor
3 - protection charact. letter for type of construction :T- motor with bimetallic thermal protection
     without designation - motor with PTC thermistor
4 - construction size
5 - frame size M - medium L - long
6 - number of poles
7- code of package length

Each modification and different design of the motor is indicated with a clear-cut code number stated in the rating plate of motor.

Ambient conditions  [up]

  • Ambient temperature: from +5 oC to +40 oC

  • Altitude above sea level:[up] to 1000 m

  • Relative humidity:[up] to 80% at 20oC

  • Max. dust contents: 1 mg/m3

The lift motor operates under the ambient conditions free from a risk of dangerous concentration of inflammable gases or vaporous, or a risk of setting[up] the atmosphere of fire hazard owing to inflammable powders.

Other types of atmosphere must be agreed on with the manufacturer.

Loading, rated output, number of poles [up]

One-speed motors are intended for intermittent periodic duty with starting, duty type S4 according to EN 60034-1. Number of starts, cyclic duration factor and additional moment of inertia are stated in the tables.

Double-speed motors are intended for intermittent periodic duty with starting and electric breaking, duty type S5 according to EN 60034-1. Number of starts, cyclic duration factor and additional moment of inertia are stated in tables. Running time of the low-speed part at cyclic loading is 3 s at least.

The machine dimensions are set so as to prevent the temperature rise in winding from exceeding permissible limit of the thermal insulation class F, provided the motor is loaded at its rating, under duty cycle and additional moment of inertia Jad. The low-speed part of motor is loaded with reference torque.

Types of constructions [up]

The basic types of constructions of the motors are IM1002 - foot-mounted and IM3002- flange-mounted according to IEC 60034-7 and IEC 60072-1. By agreement with the manufactures, also the types of constructions with one shaft end - IM1001, IM3001 or shaft protection for 2nd shaft end is available.

Bearings, axial clearance of rotor [up]

Motors of basic design are made with sleeve bearings. The ring lubrication of motor is embedded in bearing cells. Motors with rolling-contact bearings are equipped with permanent grease-fillings.

By axial clearance the difference of rotor end positions is meant. The values of axial clearance of the rotor are as follows:

  • 0,6±0,2 mm for shaft heights of 132 and 180

  • 0,6+0.3-0.2 mm for shaft heights of 225 and 250

The clearance can be eliminated with distance rings. By agreement with the manufacturer, the motor can be supplied with one set (2 pieces) of distance rings at extra charge.

Terminal box [up]

The terminal box consists of the box itself and detachable cover attached with screws. The terminal box is made with the degree of protection IP44. On the inner side of the cover there is the wiring diagram of motor.

The terminal box can be turned through 180o. On request also the motors with side-positioned terminal box can be delivered.

The terminal box is attached to the frame lugs, and the number of terminals corresponds to the respective design.

The space taken[up] by the terminal box is separated from that of the motor.

Thermal protection [up]

The motors are equipped with thermal protection which provides a complementary protection and prevents the winding from exceeding the permissible temperature rise. Each phase of winding comprises one temperature sensor.

One-speed motors are equipped with 3 sensors which are connected across the terminals T1 and T2. In two-speed motors the winding accommodates 6 sensors which are connected in series and led out to the terminals T,T1,T2.

In basic connection the relay of thermal protection is connected across the terminals T1 and T2. In case of failure of any of the sensors, the relay can be connected across the terminals T,T1 or T,T2 to exclude the faulty triad.

For the protection of winding the following types of temperature sensors can used.

a/ Thermal protection with PTC thermistors
- The overall resistance of the PTC thermistors connected in series must be lower than 1000 W.
The relay is not a part of motor delivery.
- The manufacturer re serves the right to supply instead of PTC termistor protection a bimetallic protection with series connection of ohm resistances of 270 W in each groups with three pieces of sensors.

b/ Bimetallic thermal protection
- response temperature: 140 oC +- 5 oC
- maximum voltage: 250 V

External fan cooling [up]

Motors with external fan cooling have in stator winding am embedded thermal protector which will trigger the external fan if the temperature of stator winding is in range of 85 - 105oC.

Subsequent installation of the external fan in the customer's seat:
On the customer's request it is possible to manufacture a motor which can be subsequently equipped with an external fan on one or both sides depending on results of operational tests.

Process of mounting:

Remove the fan louver and attach an external fan to its place. Motor outlets of the external fan are connected across the terminal board in compliance with the indicated wiring diagram.


  • EN 81-1 - Safety rules for the construction and installation of lifts and service lifts.
    Part 1. Electric lifts.

  • EN 60034-1: Rotating electrical machines.
    Part 1: Rating and performance.

  • IEC 60034-5: Rotating electrical machines.
    Part 5: Classification of degrees of protection provided by enclosures for rotating electrical machines (IP Code).

  • IEC 60034-14: Rotating electrical machines.
    Part 14: Mechanical vibration of certain machines with shaft heights 56 mm and higher - Measurement, evaluation and limits of the vibration severity.
    Amendment No. 1 (1988).

  • IEC 60034-7:
    Part 7: Classification of types of constructions and mounting arrangements (IM Code).

  • IEC 60072: - Dimensions and output series for rotating electrical machines.
    Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1 080.

Terms of delivery [up]

The motors are delivered against an order and subsequent contract approved by both parties. Delivery term for motors of standard design is 6 weeks. Motors made by special requirements in compliance with the catalogue can be delivered in 8 weeks

Warranty [up]

Guarantee for the motors is 24 months from the day of putting into operation, anyway 27 months from the day of dispatching them from the factory at longest.
The manufacturer undertakes the guarantee for the delivered motors provided that:

  • before use the motors have been stored in compliance with conditions specified in this catalogue;

  • at installation, putting into operation, service and maintenance, the instructions of the manufacturer stated in this catalogue or operation manual are observed.

Packing and storage [up]

The motors are covered with water-resistant foil and laid on wood transportation pallet. Motors with sliding bearings are delivered without an oil filling in bearings. Free shaft ends and metal, clean machined surfaces of the motor frame are protected with preserving varnish. When stowing the transportation pallets with motors on one another, we must avoid transferring the weight of the upper pallet onto the motors resting on the bottom pallet.
Motors have to be stored in heated storage rooms with a temperature never dropping below +5oC, where sudden temperature variations and subsequent dew formation and moistening of of the machines are eliminated. The storing room should be dry, clean and permanently free from dust. At storing, it is necessary, at least in 6 month intervals, to recheck and/or to renew the preservation, mainly the protective coatings on fitted machined surfaces, and recheck the state of insulation before a subsequent use of motors.

Data to be quoted in orders [up]

  • type designation

  • output

  • number of poles and/or speed

  • rated voltage

  • network frequency

  • duty type (max. number of switches/h )

  • degree of protection

  • type of construction (flange size FF; number and length of free shaft ends E,EA)

  • type of thermal protection (PTC thermistor or bimetallic)

  • mechanical design: with an option of subsequent installation of supplementary external fan cooling
    with one shaft end - IM1001, IM3001 or shaft protection for 2nd shaft end

Dealership in Czech republic [up]

dealer :

ELEKTRO MOSEV spol. s r.o.

Vážní ul. 500 03 HRADEC KRÁLOVÉ,


Mrs. Krsek,
tel.: 00420 49 5411 231- 3
fax.: 00420 49 5411 236

Setting up [up]

Before setting up, the bearing cells have to be filled with OL-46 oil or with oil of other type specified by the manufacturer of motor (ESSO type NUTO H 46). The oil filling volume is to be watched on an oil level gauge. The oil should be filled[up] to one half of the oil level gauge.
Location of the lift motor must ensure free access of cooling air and its getting out of the machine into atmosphere in such a way us to avoid sucking the warmed[up] air or the air getting out of some other machine. The access to the terminal box must also be ensured because of the motor connection and failure detection. With regard to operating conditions the lift motor is designed with arrangement for horizontal mounting, and is fast Ned firmly to the floor or some other fixed support (type of construction IM1002), or to a fixed flange (type of construction IM3002).

Safety requirements [up]

All work on motor is performed in a rest and denier gazed condition (with the exception of some work items to be done un deer voltage at revising the electrical parts of the motor), and the observance of all relevant safety rules specified by operative technical standards is required. At any time it is necessary to recheck whether the guard wire is duly connected and whet her the live parts are without voltage, and to prevent an accidental switch on.

Terminals [up]

At revising, it is necessary to ensure that all connecting terminals inside the terminal box are duly tightened. In case of need they must be tightened to avoid warming up the connection due to contact resistance.

Exchange of oil filling [up]

The first oil filling exchange should be carried out after a two-month service, and each subsequent exchange after 1500 service hours, anyway, once in a half-year term at least.



Copyright © 2000 Slovres a.s.

Aktualizácia: 14.11.2008