FAQs

A: MEPS stands for Minimum Energy Performance Standards. With the increasing demand for electrical energy globally, it is important to avoid wastage and improve energy efficiency. Electric motors are significant in this strategy as they account for about 40% of global energy demand. To reduce energy consumption and carbon dioxide emissions, many governments have implemented MEPS, which set efficiency standards for electric motors. These standards, defined by regional bodies like ABNT, IEC, and MG-1, help standardize efficiency levels and test methods, making it easier to select the right motors. LEDL offers a comprehensive range of electric motors that meet these efficiency standards, focusing on optimal performance, energy savings, and sustainability.

A: Electrical motors have a wide range of applications, including:

• For energy efficiency
• For hazardous areas: Ex db, Ex eb, Ex ec, or Ex tb
• For the mining industry
• For continuous processing industries
• For the food & beverage, pharmaceutical, or other industries requiring continuous cleaning
• For the steel industry
• For smoke extraction
• For industrial pump applications
• For fan and exhaust applications
• For applications with gearboxes

For elevator traction

A: According to IEC 60034-1, service duty refers to the degree of regularity of load to which the motor is subjected. Standard LEDL Electric Motors are designed for continuous running duty. This means that the load remains constant for an indefinite period of time and is equal to the rated motor output.

A: The rated output of a motor is the mechanical power available at the shaft end during continuous running duty. This concept is directly related to the temperature rise of the winding. While motors can handle higher power loads than their rated output up to the breakdown torque, exceeding the rated output can cause overheating. This can significantly reduce the motor’s lifespan or even result in motor burn out. The required motor power is always defined by the load characteristics. For instance, a load requiring 90 HP will always demand 90 HP from the motor, irrespective of whether the motor is designed for 75 HP or 100 HP.

A: The service factor (SF) is a multiplier applied to the rated output to represent the allowable load that can be continuously applied to the motor under specified operating conditions. This indicates a motor’s ability to handle continuous overload conditions, providing a power reserve to withstand adverse conditions. Service factor should not be confused with momentary overload capacity, which pertains to short-term overloads. For example, a service factor of 1.0 means the motor is not designed for continuous operation above its rated output, but it can still handle instantaneous overloads. IEC 60034-1 specifies the most common service factors for different motor outputs.

A: The degree of protection for enclosures of electrical equipment is defined by standard IEC 60034-5, using the characteristic letters IP followed by two characteristic numerals. This classification indicates the level of protection against the ingress of solid objects and water. The first numeral represents protection against solid objects, while the second numeral represents protection against water.

First characteristic numeral:

• 0: No protection
• 1: Protected against solid objects greater than 50 mm
• 2: Protected against solid objects greater than 12 mm
• 3: Protected against solid objects greater than 2.5 mm
• 4: Protected against solid objects greater than 1.0 mm
• 5: Dust-protected
• 6: Dust-tight

Second characteristic numeral:

• 0: No protection
• 1: Protected against dripping water
• 2: Protected against dripping water when tilted up to 15º
• 3: Protected against water spray at any angle up to 60º from the vertical
• 4: Protected against water splashing from any direction
• 5: Protected against water jets from any direction
• 6: Protected against heavy seas or powerful water jets
• 7: Protected against the effects of immersion
• 8: Protected against the effects of continuous submersion

A: While different combinations of characteristic numerals can indicate various degrees of protection, the most commonly used degrees are:

• IP21 and IP23 for open motors
• IP44 and IP55 for enclosed motors

For special and more hazardous areas, the commonly used degrees of protection include:

• IPW 55 for weather protection
• IP56 for protection against water jets
• IP65 for total protection against dust
• IP66 for total protection against dust and water jets

A: The hottest spot temperature in the winding should be maintained below the maximum allowed temperature for the insulation class. The total temperature is the sum of the ambient temperature, the temperature rise (∆t), and the difference between the average winding temperature and the hottest spot. Motor standards specify the maximum temperature rise (∆t) to ensure the hottest spot remains within allowable limits. Key considerations include:

• Ambient temperature should not exceed 40 ºC; above this, conditions are considered special operating conditions.
• The difference between the average temperature of the winding and the hottest spot is specified by standards: 5 ºC for Classes A and E, 10 ºC for Class B and F, and 15 ºC for Class H.

A: IE2, IE3, IE4, and IE5 motors are classified based on their energy efficiency levels according to international standards.

• IE2 Motors: Standard efficiency motors.
• IE3 Motors: High-efficiency motors.
• IE4 Motors: Premium efficiency motors.
• IE5 Motors: Ultra-premium efficiency motors.

The efficiency levels are defined by standards such as IEC 60034-30-1, which specify the minimum efficiency percentages for each class. For example, an IE2 motor is less efficient than an IE3 motor, and so on. These efficiency standards help reduce energy consumption and operational costs.

Other aspects that are typically included on the nameplate of these motors are:

• Motor power rating (kW or HP)
• Voltage and frequency
• Full load current
• Speed (RPM)
• Efficiency class (IE2, IE3, IE4, IE5)
• Power factor
• Insulation class
• Service factor
• Degree of protection (IP code)

These details ensure proper selection, installation, and operation of the motors in various applications.

A: The categories cover a wide range of industries and applications, each with specific motor requirements and characteristics to meet their unique demands

Industrial Applications

• Crusher Motors: Used in mining and construction industries.
• Cooling Tower Motors: Utilized in HVAC systems and industrial cooling towers.
• Compressor Motors: Employed in refrigeration, HVAC systems, and industrial air compressors.
• Pump Motors: Found in water treatment plants, irrigation systems, and industrial fluid handling.
• Fan Motors: Used in ventilation, exhaust systems, and HVAC applications.
• Conveyor Motors: Applied in material handling and manufacturing processes.
• Extruder Motors: Used in plastic and rubber processing industries.
• Mill Motors: Found in the mining, cement, and paper industries.
• Roller Table Motors: Utilized in steel plants and rolling mills.
• Blower Motors: Applied in industrial blowers for air circulation and drying processes.

Commercial and Residential Applications

• HVAC Motors: Heating, Ventilation, and Air Conditioning systems in buildings.
• Elevator Motors: Used in elevators and escalators.
• Garage Door Motors: Found in residential and commercial garage doors.
• Swimming Pool Pump Motors: Employed in residential and commercial swimming pools.
• Washing Machine Motors: Used in household and commercial laundry machines.
• Refrigerator Motors: Found in residential and commercial refrigeration units.

Specific Industry Applications

• Agricultural Motors: Used in farming equipment like irrigation pumps, grain augers, and feed systems.
• Marine Motors: Employed in marine propulsion systems and auxiliary equipment.
• Textile Motors: Used in textile manufacturing machinery like looms and spinning machines.
• Mining Motors: Applied in mining equipment like hoists, crushers, and grinding mills.
• Oil & Gas Motors: Found in drilling rigs, pumps, and compressors used in the oil and gas industry.
• Wind Turbine Motors: Used in wind energy generation systems.
• Electric Vehicle Motors: Employed in electric cars, buses, and other electric vehicles.
• Railway Motors: Used in locomotives and rail transportation systems.

Specialized Applications

• Servo Motors: Used in robotics, CNC machinery, and automation systems.
• Stepper Motors: Employed in precise motion control applications like 3D printers and automated machinery.
• Brushless DC Motors: Found in applications requiring high efficiency and reliability like drones, electric vehicles, and medical devices.
• Synchronous Motors: Used in applications requiring constant speed such as clocks, timers, and synchronous conveyors.

Other Applications

• Generator Motors: Used in power generation equipment.
• Submersible Motors: Employed in underwater applications like submersible pumps and underwater vehicles.