The IE1 motors lie in the Standard Efficiency range. The IE2 motors lie in the High-Efficiency range. The IE3 motors lie in the Premium Efficiency range and the IE4 motors lie in the Super Premium Efficiency range.
What is IE1 IE2 IE3?
The IE Efficiency classes defined as: IE1-Standard Efficiency (Comparable to EFF2) IE2-High Efficiency (Comparable to EFF1) IE3 – Premium Efficiency.
What is motor efficiency rating?
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 IE1?
After the first electron is removed, there are a greater number of protons than electrons. As a result, when a second electron is being removed, the energy required for the second ionization (IE2) will be greater than the energy required for the first ionization (IE1) . In other words, IE1 < IE2 < IE3 < IE4 .
What does IE3 motor mean?
IE2 motors: High efficiency motors. IE3 motors : Premium efficiency motors. IE stands for International efficiency. Above efficiency class motors are in accordance with the standards IEC 60034-30:2008 and IS 12615:2011. These standards defines efficiencies for.
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 a premium efficiency motor?
Premium efficiency motors are designed by including more iron and copper material than is used on standard electric motors. As a result, premium efficiency motors are typically larger and heavier than standard electric motors.
Which motor has highest efficiency?
Consequently, AC motors are less efficient than DC motors. In fact, the DC motor is 30% more efficient than AC motors due to the secondary magnetic field being generated from the permanent magnets rather than copper windings.
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 formula of efficiency?
Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.
Why is IE2 greater than IE1?
Second ionization energy is greater than first ionization energy for an element as it is harder to remove a negatively charged electron from the positively charged ion.
Why is IE1 always less than IE2?
as more energy is need to remove second electron as now electron is to removed from a positively charged ion. Thus there is more attraction of electron towards the positively charged ion and thus more energy is required.
What is IE1 and IE2 in chemistry?
The minimum energy required to remove an electron from most loosely bound electron from isolated gaseous atom to convert it into a gaseous uni positive ion called IE1. … The energy required to remove an electron from unipositive gaseous ion is called IE2.
What is the efficiency of a premium efficient motor?
What is the Efficiency of NEMA Premium Motors? This table is for motors operating at full-load. However, NEMA Premium Efficiency motors can normally operate at high efficiency for all load values above 50%, reaching their peak efficiency at around 80% load.
What is the difference between NEMA and IEC motors?
NEMA caters to large-sized devices in North American Markets only. IEC ratings are for more compact devices in the global market. IEC ratings react faster to overloads while NEMA ratings withstand short circuits. IEC devices are safe to the user, while NEMA devices require safety covers.
Are Motors standard?
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.