- 1 What are IEC motors?
- 2 What is the difference between NEMA and IEC motors?
- 3 What are the different sizes of electric motors?
- 4 Is IEC metric?
- 5 Are motors standards?
- 6 What does IEC mean?
- 7 What does NEMA stand for?
- 8 What is a NEMA rated motor?
- 9 What is a NEMA motor rating?
- 10 What are 4 common types of motor enclosures?
- 11 How do I know what size electric motor to buy?
- 12 How do I know what size electric motor I need?
- 13 What are the IEC standards?
- 14 What is frame size in motor?
What are IEC motors?
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 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.
What are the different sizes of electric motors?
Motors come in different horsepower categories, including: fractional motors (1/20th HP to 1 HP), integral horsepower motors (1 HP to 400 HP), and large motors (100 HP to 50,000 HP). RPM ratings include 3600 RPM (2 pole), 1800 RPM (4 pole), and 1200 RPM (6 pole).
Is IEC metric?
The metric system is used in most parts of the world, while the imperial system is used in the U.S. These two standards of measurement can be applied to anything we use. Similar to NEMA, IEC publishes Standard 60034-1:2010, the standard outside North America.
Are motors standards?
The noise level of motors shall be as given in IS 12065. The terminal markings shall be as given in IS/IEC 60034-8. NOTE — Efficiency class of IE 4 is under consideration and would be incorporated at a later date by reducing the losses further than IE3 levels.
What does IEC mean?
IEC stands for the International Electrotechnical Commission: An “organization that prepares and publishes international standards for all electrical, electronic and related technologies.”
What does NEMA stand for?
NEMA is a common term used in the manufacturing industry, it stands for National Electrical Manufacturers Association. NEMA was originally formed in 1926 to set standards for companies producing electrical products, equipment, or wiring in industrial facilities.
What is a NEMA rated motor?
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.
What is a NEMA motor rating?
For an electric motor, one horsepower is equivalent to 746 watts of electrical power and is the standard rating in the United States. NEMA defines certain characteristics or ratings of motors down to 1 milli horsepower for certain types of motors, and up to 100,000 Hp for synchronous machines.
What are 4 common types of motor enclosures?
The Most Common Types Of Electric Motor Enclosures
- The most common types of enclosures are:
- Open Drip Proof (ODP)
- Weather Protected (WP1 / WP2)
- Totally Enclosed Fan Cooled (TEFC)
- Totally Enclosed Non-Ventilated (TENV)
- Totally Enclosed Air Over (TEAO)
- Totally Enclosed Forced Ventilated (TEFV)
- XP (Explosion Proof)
How do I know what size electric motor to buy?
To determine the technical specifications, it will be necessary to determine the power, torque and speed of the motor. In order to determine the size, you must know how much space the motor will take up and how it is mounted (i.e.how it will be fixed in the system).
How do I know what size electric motor I need?
Divide the motor speed by the required speed and round down to get a starting gear ratio. Then divide the required torque by the gear ratio to find the newly required torque. This will help you narrow the choices down to a few select motors.
What are the IEC standards?
IEC International Standards are always used by technical experts; they are always voluntary and based on the international consensus of experts from many countries. International standards also form the basis for testing and certification.
What is frame size in motor?
The two-digit frame number relates to the shaft height in sixteenths of an inch. You can figure that a 48-frame motor will have a shaft height of 48 divided by 16, or 3 in. Similarly, a 56-frame motor has a shaft height of 3.5 in.