What is frame size of motor?

What is frame size of motor?

The frame sizes normally associated with fractional horsepower motors are 42, 48, and 56. In this case, each frame size designates a particular shaft height, shaft diameter, and face or base mounting hole pattern. In these motors, specific frame assignments do not relate to horsepower and speed.

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.

What is frame size in induction motor?

In fractional horsepower motors the frame sizes are two digits and represent the shaft height of the motor from the bottom of the base in sixteenths of an inch. For example, a 56-frame motor would have a shaft height (“D” dimension) of 56/16 of an inch, or 3.5 inches.

Is standard for motor dimensions?

The dimensions of the motors shall be as specified in IS 1231, IS 2223 and IS 2254 as applicable.

What is a motor frame number?

The frame number relates to the “D” dimension (distance from center of shaft to center bottom of mount). For example, in the two-digit 56 frame, the “D” dimension is 3½”, 56 divided by 16 = 3½”. For the “D” dimension of a three-digit frame number, consider only the first two digits and use the divisor 4.

Is IEC metric?

When measuring, some use the metric system, and others use the imperial system. Similar to NEMA, IEC publishes Standard 60034-1:2010, the standard outside North America. NEMA and IEC motors are similar in size, efficiency and output power.

What size is a 48 frame motor?

Electrical motors NEMA frame dimensions.

What is a 56 frame motor?

Specifically “Frame” refers to the diameter of the armature in the motor. Although 2 motors may have the same horsepower rating, a 56-Frame motor will be 40% larger. It will also run cooler and last longer.