Regal Beloit is now Regal Rexnord. Click here to learn more.

Solutions

Bearing design

The bearings in an electric motor are used to support the rotor, to bear the forces that are created in the motor and to position the rotor in the stator. The accuracy of the bearing design must meet high criteria to guarantee trouble free electric motor operation. If an electric motor is connected directly to the driven equipment, the bearing of the electric motor often absorb forces created in by the driven equipment. Rotor nl® electric motors are equipped with axially pre loaded and located bearings as standard.

 

 


Bearing Monitoring

All rotor nl electric motors are dynamically balanced with half key in accordance with the IEC 34-14 (2003) standard. The letter H (for Half key) is specified on the rating plate and on the shaft end as a sign the motor was balanced with a halve key. The letter F (for Full key) means that balancing has taken place with the full key.

 

 


Brake motors

Brake type- single disc brake mounted by means of a special mounting kit.

Braking principle- by means of loose springs. The brake is lifted electro-mechanically with direct current voltage 205 V DC.

 

 


Cable entry position and possibilities

The rotor electric motors are supplied with a cable connection on the right side (pos. 1). The terminal box entry is 4 x 90 ° rotatable, which allows for cable entries pos. 2 (DE), pos. 3 (left) and pos. 4 (NDE). Rotor can also supply motors where the cable is already fitted in the terminal box or where the cable is connected directly to the windings, which leaves the terminal box superfluous.

 

 

 


Coating Systems

Upon request any electric motor can be sprayed/painted in any of available colors. Rotor operates its own spray shop where special anti-corrosion coatings can be applied. These coatings consist of several layers of paint with different characteristics, which, in the correct combination, are resistant to a number of corrosive agents such as seawater, chemical fumes etc.

 

 


Degree of protection IP

The Degree of Protection of rotating electric machines is defined as protection against the penetration of mechanical particles, dust and water. The Degree of Protection is defined in the following standard: IEC 34-5 (NEN-EN 60034-5).

 

 


Insulation Class

Various insulation materials are used in electric motors and each has its own function. All these insulation materials are specified in thermal classes that are referenced using a letter (Y—A—E—B—F—H—C). Every thermal class has its own temperature limit specified (see table). An insulation material of a specific class needs to retain its mechanical and electrical properties within the temperature limit and have a reasonably long service life. The maximum permissible temperature rise (see table) of the winding is determined based on the thermal class temperature limits.

 

 


Lubrication Systems and Grease

The rotor nl electric motors that have been fitted with open bearings, are supplied with a lithium based grease as standard. Grease types based on lithium with mineral base oil can be used for re-lubrication. Good quality high temperature grease should be the preferred choice. If an electric motor is fitted with a special bearing and/or special grease (upon request), the bearing/grease information would be specified on the rating plate as well as the re-lubrication period. Re-lubrication must be done accordingly.

 

 


Marine Motors and Certificates

The mechanical and electrical performance of the basic rotor nl electric motors is adapted for marine and offshore application. All rotor nl electric motors are tested after assembly to guarantee their correct operation and are subject to high-voltage insulation and no-load run tests. Additional tests can be performed in the factory test laboratory.

 

 


Motor Cooling

Totally Enclosed Fan Cooled electric motors (TEFC) are air cooled motors provided with an external fan that is fitted on the electric motor’s own shaft or independently driven. It is also possible that the electric motor is installed in an air flow without a fan (TEAO, Totally Enclosed Air Over). The air necessary for cooling of the motor is usually provided by the driven equipment. The Totally Enclosed Non Ventilated electric motors (TENV) have no fan nor are they subject of forced cooling. There TENV motors are in particular used for short term duty cycle (i.e. S2-10min duty).

 

 


Motor Thermal Protection

All electric motors should be protected against overloading. Electric motors will develop a fault when overloaded as the temperature rises above the thermal limit of the insulation materials during the overload, which results in the loss of the mechanical and electrical properties.

 

 

 


Mounting Positions

The specified mounting must always be mentioned when ordering an electric motor. The actual motor mounting may influence the protection class and bearing design. Flange mounted electric motors need further specification of the required pitch circle diameter (dimension M) of the fixing holes in the flange (FF or FT type of flange). FF (Flange Free Holes) = free holes are in B5 flanges, FT (Flange Tapped Holes) = tapped holes are in B14 flanges. The pitch circle diameter (dimension M) is specified in the EN50347 standard in relation to the frame size for the FF (B5) flange and the FT (B14A) flange (up to 160 frame). The pitch circle diameter (dimension M) is not specified for FT (B14B) flanges in the EN 50347 standard, they however are specified in IEC 72-1 standard. The motor mountings and the positions are summarized in the IM code as per the table below. For detailed information please consult the IEC 34-7 (NEN 10034-7) standard.

 

 


Power and Duty Cycle

The unit of power output is kW (1HP = 0.75kW; 1 kW = 1.34 HP). The power output values specified are based on maximum power at continuous load at what the thermal stability of the motor winding is attained. The continuous load is referred to as S1 duty cycle. The duty cycles (S1 to S10) have been defined in IEC 60034-1 standard indicating the run cycles of electric motors and in case of the intermittent duty also the frequency of the run periods. The power output limit up to which an electric motor can be utilized is determined by the maximum permissible temperature of the stator winding. The electrical and mechanical parameters of electric motors are based on duty cycle S1 - continuous operation.

 

 


Space heaters

Electric motors that are not continuously running (S1 duty), are usually provided with a standstill or space heater coils (SHC). The heaters switch on when the electric motor is not running and ensure that a constant temperature inside the motor housing is maintained. Sudden differences in temperature inside the electric motors cause water condensation, which is harmful and can shorten the service life of electric motors. The heaters keep constant temperature in motors after they have been switched off and prevent forming condensation.

 

 


Terminal Box Position

For the position of the terminal box a choice can be made between on top or on either side left or right of the electric motor, facing the output shaft . The rotor nl® standard terminal box is on top (TOP). Conversion of a terminal box to the side (right or left) is often possible. Please contact us for further information.

 

 


Voltage/Frequency Inverter

The rotating speed of an electric motor can be controlled by frequency inverter. This variable rotating speed control provides many advantages such as optimization of production processes and energy saving. The speed and the power needed to drive the driven equipment can be tailored more accurately when a frequency inverter is utilized. Frequency inverter driven motors consume less energy than fixed speed drives with a different way of control.

 

 


Euro voltage

The IEC 38 “standard voltages” standard (sixth edition) was published in 1983. This standard describes the standard voltages for the network, the equipment and the installations. This standard makes provisions for a “standard voltage” of 3 x 230V/400V - 50 Hz. As a result of this standardization, a larger area in ­which the same voltage dominates will be created in due course. This ensures fewer voltage variations in devices.

 

 


Bearing load, life and lubrication

The assumption is usually made when constructing the electric motor that the electric motor will be coupled to a machine with a flexible couple or a V-belt transmission. However, electric motors are also often coupled to the machine directly. Therefore, the electric motor bearing is also directly loaded with axial and/or radial forces originating from that machine. Usually such a load is significantly larger than the load of the electric motor itself. The total axial and/or radial ­load in combination with the rotational speed and the applied bearing design must always be taken into account when calculating the bearing service life.

 

 


Electric motor basics

An electric motor is a commonly used device that transforms electrical energy into mechanical energy through the interaction of magnetic fields. The main two components of an electric motor are the stator and rotor. The stator contains copper windings which are designed to carry direct current and set up a magnetic field. The windings are alternately magnetized, creating a magnetic field in the stator. The rotor is levitated to one side by the magnetic field. Because the three windings are alternately magnetized, the rotor begins to rotate.



This name is used, please enter another
{0} was created successfully.
{0} was deleted successfully.
New password and confirm password do not match.
The password entered does not comply with our password policy. Please try again.
The password entered does not comply with our password policy. Please try again.
You have already access to entered account.
Account already added
Please select an account
The entered account number is not valid or the account is not yet transitioned for use at Regalrexnord.com.
You must provide a valid account number to be added. Please contact your Sales Representative or Account Administrator if you don’t know your Account Number.
Please select Additional Access checkbox.
Please enter your address.
Please enter your address cont.
Please check to agree with Terms of Use and Privacy Policy.
Please enter your city.
Please enter your company name.
Please enter confirm password.
Please select your country.
Please enter a valid format for your email address.
Email address required
Please enter your email address.
Please enter your first name.
Please review and select a warehouse for Catalog/Part Numbers: {0}
Please enter your job title.
Please enter your last name.
The current password entered does not match your password or new password is the same like one of the previous or password changed last 30 days.
Profile updated successfully.
Error while request access.
Registration Information has been received.   Thank you for your interest in Regal Rexnord.
Please enter new password.
Please enter old password.
Please enter a valid format for your phone number.
Please enter your phone number.
Please enter a valid format for your extension.
Please select at least one product category.
Please verify you are not a robot.
Registration Information has been received.   Thank you for your interest in Regal Rexnord.
You must provide the name of a Regal Rexnord employee who can confirm your need for access to Genteq technical documents.
Please select your state.
This email is already in use. Please log in.
You do not have permission to access this page.
Confirmation code has been sent successfully to your new email address. Please enter the Confirmation code and update the profile.
Email Address has been changed successfully. Please check your email for information to login again.
Verification code required
Please enter your zip code.
Your session has timed out. You must log in again to access secure content. Any work on the current page will be lost.
Your shopping cart qualifies for free shipping.
Minimum order quantity is {0} {1}. Please enter a valid quantity for item: {2} .
Item must be ordered in multiples of {0} {1}. Please enter a valid quantity for item: {2} .
Add {0} more to your cart to qualify for free shipping.
Item {1} has been removed from cart.
Add {0} more to qualify for free shipping.
This item is discontinued, but you may order against the remaining inventory. You have requested {4} items of the total remaining quantity of {2}.
The following item(s) have been added to your cart: {0}
Request of quotes should allow items in same segment
Uploaded file is not supported, File upload supports word, excel and pdf.
File too Big, please select a file less than 20mb
The item you have entered have no business segment.
The item {1} allow maximum {0} quantity.
The item {1} requires a minimum of {0} quantity.
Please enter Required Specifications.
Error submitting request.
Your request has been submitted successfully.
Please enter valid product.
The item {1} must be in multiples of {0} quantity.
The {0} you have entered was not found. Please revise.
File size requires longer download time
File is not found. Please try again or contact customer service.
Sorry, at this time this product does not comply with the standards of the country you selected.
This product complies with the standards of the country you selected.
The account you are currently on does not have access to purchase this product. Please change to your {0} account to purchase.
The following item(s) have been moved to {0}: {1}
Quantities over {0} may require additional lead time. A Regal representative will contact you if this occurs.
You can only order in multiples of {0}. Please enter a valid quantity for this item.
You have no products selected for comparison. Please select at least two products to compare using the 'Add to Compare' checkbox found on product list pages or product detail pages.
Sorry, this item is no longer available.
POPULAR
Discontinued
Available warehouses not found.
The item requires a minimum order of {0} pieces.
The item requires a minimum order of {0} {1}.
The item must be ordered in multiplies of {0} pieces.
The item must be ordered in multiples of {0} {1}.