Motors for basket

Motors for the basket to self-priming pumps are the result of over 30 years of specific experience in the field.

MOTOR for basket

Studied for the command of the basket of industrial washing machines to dry and to water. Mechanical protection IP21 and IP54 in harmony with the machine directives 89/392 EEC. The powers range from 0.15 to 22kW.

Product designation

The motors of this section, are specifically designed to control the basket of industrial washing machines dry and water, which represent, both in terms of concept that the best technological solution that Ber-Mar received through 30 years of specific experience in the field. The awareness of having achieved the enviable status as a world leader in the construction of these particular electric motors drives us continuously in research and development of products that consistently meet quality standards and functional to which we accustomed our customers. Here is therefore the need to present with this new catalog the constructive synthesis of the most recent technology investments in the production, development, testing and distribution that our company has made to project with greater success to the years 2000. The particular development of these multipolar motors, allowed the achievement of relations of washing and spinning, in modern machines, a good compromise with the use of only one motor. This solution greatly simplifies the coupling between the motor and the basket, and also makes it extremely reliable and elastic this kinematic mechanism which is continuously subjected to change of the rotation; the high polarity also resolves the problem of the temperature rise resulting from repetitive start, thanks also to the low starting current. The low polarity must however provide a starting torque, which ensures the cold starting in particular loading conditions or low voltage, and at the same time a gradual start-up that promotes a uniform distribution of the garments and therefore a good balancing of the basket during its rotation at high revs.

Construction features

Housing
The stator housing, high strength and stiffness obtained steel plate calendered and welded on the stator to improve the noise characteristics of the engines.

Terminal block
The terminal box is normally placed on the upper side of the engine; on request it is possible to mount 90° to 90° on its axis and can be rotated on the outer diameter of the motor as needed.
Is designed to receive one or two cable glands (Normally not supplied) for the input of the line, it is obtained by injection of thermoplastic self-extinguishing and resistant to chemicals, meets the needs of certain chemically harsh industrial environments and also has excellent mechanical strength.
Is fixed by four screws to a support in galvanized steel previously welded on the stator frame .

Ventilation
The ventilation of these motors is obtained by cast aluminum fins alloy on the outer ring of the rotor.

Screws
Nuts and bolts are normally zinc-tropical conditions.

Rotor
The rotor cage of aluminum large diameter is inherent robustness, it is dynamically balanced according to ISO 2373.

Ground terminal
All the motors referred to in this section are fitted, inside the terminal box, with an earth terminal fixed to the casing and are designed for the application of a second earth external to the box.

Mechanical Protection
These motors are presented in two different security configurations; IP 21 and IP 54, this need has occurred to allow the construction of the machine, where it is necessary protection IP 54, in harmony with the machine directives 89/392 EEC.
They have instead been retained configurations IP 21 for the machines built for non-European countries where it is not expressly required compliance with the above mentioned directives, said last configuration allows significant cost savings, all motors are normally able protection IP 54 for theterminal box.

Cooling Method
The motors of this section with mechanical protection IP21 are open and exploit the intake air through the vents inside the caps to exert an aerodynamic action on the windings, it is then expelled, after having cooled windings themselves from the outermost vents of the caps closing of the motor, this system is extremely effective and quiet and does not require major maintenance.
The IP 54 motors have the end caps finned and exploit the same for the heat exchange of the rise of windings, the fins on the rotor is assigned the task of movement of the air inside the motor to avoid condensation, wind noise in these engines is null, the ventilation system is responsive to the international code IC 411, IEC 34-6..

Insulation, winding
The standard insulation of the motors for moving the basket is class F, IEC publication 85 sets a temperature limit of 155 °C with ambient to 40 °C.The use of copper wire insulated with double layer of enamel class H insulation and quarry Nomex provides additional security to the thermal insulation system.

Windings
The impregnation of the windings is obtained with special resins with high resistance to moisture, heat and vibration, the chemical hardening of these resins is obtained by drying in oven at 150 °C for a minimum of 8 hours, the production process above it makes the motors suitable services and the most severe climatic conditions.
Overheating normally achieved in the windings are well below the limits allowed by law overexposed.

Protection for tropical environments
For better resistance to warm and very humid, chemically aggressive agents and saline can be provided, on request, motors with special treatments to the windings and on the external metal parts through electro-enamel protective moisture-resistant, mildew and to chemical agents, these treatments are normally associated with the use of screws in stainless steel.

Thermal protection
With particularly heavy services, faced by motors of this section (frequent starts, high moment of inertia of the driven load) thermal protection contactor control is often not enough, it is therefore necessary to effective thermal protection for the windings. Ber-Mar has decided to equip all motors, for the movement of the basket, of its production of thermal protectors in bimetal disc; when the winding temperature reaches the thermal threshold of intervention of the bimetallic relay its contact, normally closed, opens and interrupts directly to the contactor coil and consequently the power of the engine, the resetting of these protectors is automatic consequently must activate an appropriate external system so that the restart of the motor is manual.
Since the thermal inertia of the bimetal protectors is relevant and especially the winding of the centrifuge could be affected by this delay, Ber-Mar has developed a thermal protection system via thermoprotectors thermistor connected to a tripping device for its production (system supplied on request alternatively bimetal protector), when the winding temperature reaches the thermal threshold of intervention of the thermistor, the resistance of the same has a sudden increase and determines the interruption of the signal to the release device which in turn directly interrupts the contactor coil and consequently the motor power supply, a reset of the tripping devices Ber-Mar is manual and therefore do not need additional equipment for their operation in accordance with the guidelines in force.

The thermal protection thermistor is recommended for high power motors or what was in the presence of the following cases:

• Overload to increase drag torque
• Mains consistently too high or too low
• Operating with a phase down
• High temperature
• Failure to start due to excessive load torque.

Temperature thermal protection intervention
The operating temperatures for thermal protectors mounted on motors for moving the basket are as follows:
Motors with IP 21 degree heat intervention 125 ° C +/- 5%
Motors with IP 54 degree heat intervention 155 ° C +/- 5%
The thermoprotectors used meet the requirements of IEC 34-11 and VDE 0700, motor products to UL and CSA thermal protectors are used with the same thermal characteristics and fulfill the requirements for UL and CSA, and have the following certifications;And UL 54236, CSA 41402.

Maximum Voltage and Current
At the terminals of the contacts of bimetallic thermal protection can be applied maximum 277 V ac and a maximum current of 2.5 amps.

Operating Conditions

Power
Powers showing on the technical data apply to supply voltage and frequency, with maximum ambient temperature of 40 °C and altitudes up to 1,000 meters a.s.l., environmental conditions may require modification of the powers.

Electrical data and tolerances
In the technical data shows the values ​​of efficiency and power factor related to the load and the nominal supply. These values ​​vary depending on the change of the load.

Powers
Motion Motors basket can work, constant power output, even at deviating voltage of +/- 5% from the nominal value, at nominal frequency; according to IEC 34-1 the temperature rise limits may be exceeded by up to 10 Kelvin.

Noisiness
The average level of sound pressure Lp in dB (A) and sound power Lw in dB (A) measured on the motors of this section according to ISO 1680 within the limits prescribed by the regulations VDE 0530T.9 for the sound pressure and the IEC 34-9 for the sound power;

 

Series
Mechanical Protection
Sound pressure Lp in dB (A)
Sound powerLw in dB (A)
L 200 - 230 - 250
IP 21
75
86
L 300
IP 21
77
88
L 350 - 380 - 425
IP 21
78
87
L 230 - 250
IP 54
63
77
L 300
IP 54
65
79
L 350
IP 54
68
80

 

Mechanical vibrations
All rotating shafts of the motors of the section for moving the basket are dynamically balanced and are related to the degree of vibration "N" according to the international standard ISO 2373, are available on request balancing can "R" or "S", the intensity of the vibrations is measured in the range 10 ... 100 Hz and is expressed in rms value in mm / s.

Terms of use

Storage
While waiting to be installed on, the motor must be kept in a covered, clean and dry site. Do not hold for any reason these engines exposed to the atmospheric agents.

Installation
The motors must be installed in a ventilated room and away from strong sources of heat. For motors with class IP 21 provide for an appropriate free space on the sides for effective ventilation cooling air suction.

Connection
Use cables of enough to prevent overheating and / or excessive voltage drops. Make connections according to the diagrams provided in the terminal box, and make sure the input of power cables to maintain the degree of protection. Always perform the ground connection with the appropriate terminal using copper conductors section according to current standards.

Startup
After a long period of inactivity, you must ensure that the value of insulation resistance is not less than 1 Mohm, it is also essential to check the condition of the cables on the terminals of the winding and for motors with IP 21 that there are no foreign objects inside the engine.

Direction of rotation
Check carefully that the direction of rotation is as desired by small insertions voltage to the motor, if it was not the correct direction, power down the machine at the main switch and reverse two wires to the motor, on completion properly tighten the nuts of the terminal and consequently the screws of the terminal box.

Maintenance

Heating engine
To avoid excessive heating of the engine, it is necessary to keep clean the outer surface of the motor housing and the grid of the end caps of the motor.

Check screws
Occasionally, check the proper tightening of the supply cables of the motor and of the clamping nuts of the motor itself, the exact tension of the transmission belts, where they exist, and also that they are not extras vibration or abnormal noise.

Spare parts
The request of the spare parts you need to refer to the type of pump, the serial number indicated on the label and the name of the particular page derived from the nomenclature of the components.

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