In addition to defining efficiency classes for electric motors, the IEC has also developed a standard that specifies how to determine motor efficiencies and losses based on established testing methods. This standard, IEC 60034-2-1 : 2014, provides the basis for defining the efficiency classes in IEC 60034-30-1.
What is IEC standard for motor?
IEC Standards for electric motors In short: the International Electrotechnical Commission (IEC) standards are the uniform standards indicating the efficiency classes for electric motors. In 1999, the European Commission established different efficiency classes for electric motors.
Is standard for motor maintenance?
This standard was first published in 1956 and revised in 1965 to incorporate the prevalent practices applicable to motors rated voltage up to 11 kV and having outputs from 60 kW to 250 kW. … This standard is intended to serve as a ‘guide to installation engineers, contractors and users of electric motors.
Is standard for energy efficient motors?
The Bureau Of Indian Standards (B.I. S.) has adopted IS 12615, 1989 for Energy efficient three phase Squirrel Cage Induction Motor. … This standard specifies that efficiency of an EEM at 75% and 100% of the rated output shall not be less than that specified in the standard.
Which is standard is used for defining class of motors?
The energy efficiency of electric motors is defined in the international standard on efficiency classes for motors: IEC 60034 Part 30 – Efficiency classes of line operated AC motors (IE code). IEC stands for the International Electrical Commission, a global standardization organization.
What is difference between NEMA and IEC?
The primary difference between the two contactors is that NEMA provides for up to 25% service factor. IEC, on the other hand, focuses on space and cost-savings. It tests components to their exact design IP rating, using utilization categories to rate items according to their intended use.
Is 12615 a standard motor?
This standard specifies the performance requirements and efficiency of three phase squirrel cage energy efficient induction motors. This standard was first published in 1989 and revised in 2004 to include two types of energy efficiency values.
What is considered to be the normal service life of an electric motor in terms of hours of operation?
The answer to how long motors last will vary and is dependent upon many factors. Some manufacturers estimate 30,000 hours, while others state 40,000 hours.
Is standard for single phase motor?
For the purpose of this standard, the preferred rated voltage shall be in accordance with IS 12360 be 230V. 4.2 Rated Frequency The rated frequency shall be 50 Hz. The preferred output ratings shall be 2.5, 4, 7, 12, 18, 25, 40, 60, 90, 120, 180, 250, 370, 550, 750, 1 100, 1 500 and 2 200 Watt.
What is the maintenance of motor?
The maintenance program for every five/six months: Clean motor thoroughly, blowing out dirt from windings, and wipe commutator and brushes. Check brushes and replace any that are more than half worn. Examine brush holders, and clean them if dirty.
What is the most energy efficient electric motor?
Tests carried out on a 44 megawatt 6-pole synchronous ABB motor shortly before delivery showed an efficiency 0.25 percent greater than the 98.8 percent stipulated in the contract, resulting in the world record for electric motor efficiency.
What electric motor has the best efficiency?
ABB recently set the world record for electrical synchronous motor efficiency. During factory acceptance tests (FATs) carried out with the customer present, we recorded a result of 99.05% full load efficiency on a 44 megawatt, 6-pole, synchronous motor.
What is the maximum efficiency of an electric motor?
Most electric motors are designed to run at 50% to 100% of rated load. Maximum efficiency is usually near 75% of rated load. Thus, a 10-horsepower (hp) motor has an acceptable load range of 5 to 10 hp; peak efficiency is at 7.5 hp. A motor’s efficiency tends to decrease dramatically below about 50% load.
What is IE rating of motor?
Internationally, there is a standard which stipulates the energy efficiency of low voltage AC motors, namely the International Efficiency (IE). The purpose of which is to promote higher energy efficiency to reduce the energy consumption and the energy cost of low voltage AC motors.
What is motor life cycle?
Three types of motor have been considered: the synchronous reluctance motor, the permanent magnet assisted synchronous reluctance motor and the induction motor. The assessment of lifecycle has been made in terms of its four stages: manufacturing, distribution, use and end of life.
How is motor efficiency calculated?
To calculate a motor’s efficiency, you must measure its mechanical output power and divide it by the electrical input power. Measuring mechanical output power is fairly easy: You can use a torque meter to find the mechanical power based on the motor’s speed and load.