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.
What are IEC standards and IEC ratings?
The International Electrotechnical Commission (IEC) is a non-profit, non-governmental international standards organization that prepares and publishes international standards for all electrical, electronic, and rated technologies, which are collectively referred to as “electrotechnical”.
What are IE standards?
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.
Why are IEC contactors and starters much smaller in size than their NEMA counterparts?
Size is the most apparent outward difference between NEMA and IEC motor controls. The NEMA contactor is physically larger than the IEC contactor for a given current rating. The larger size implies that ruggedness and durability are inherent in the NEMA motor control.
What is an IEC rating?
Electric and electronic equipment deteriorate or malfunction when water or dust enters the device. The IEC has developed the ingress protection (IP) ratings, which grade the resistance of an enclosure against the intrusion of dust or liquids. The ratings are widely used throughout industry.
What is a NEMA starter?
NEMA electrical motor starters refer to a standardized rating system for the electrical performance of the most common style of American-built motor starters. NEMA starters are rated by size: 00, 0, 1, 2, 3, 4, 5, 6 and 7.
Are motors standards?
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.