In this article we will discuss about:- 1. Protection of Low-Voltage (Below 1,000 V) 3-Phase Induction Motors 2. Protection of Large Sized Motors 3. Protection for Exclusively Synchronous Motors. Protection of Low-Voltage (Below 1,000 V) 3-Phase Induction Motors: These are the most widely used industrial motors. Circuit diagram for a magnetic contactor starter for a low-voltage 3-phase induction motor is [...]
The power flows from the motor in the base to the cone-pulley by means of a belt. The belt can be adjusted to three or four positions to vary the spindle-speed. Fig. 12.15 gives the idea as to how the different spindle speeds can be obtained. Various spindle speeds can be obtained by shifting the belt on different steps of [...]
Several considerations involved in the selection of motors are given below: Consideration # 1. Power Supply: In most of cases where A.C. is available, it is quite suitable to use A.C. motors. However, if a wide range of speed is required by a number of machinery, it is advantageous to use. D.C. motor and interpose suitable conversion apparatus like motor [...]
Here is a compilation of essays on ‘Energy-Efficient Motors’ for class 8, 9, 10, 11 and 12. Find paragraphs, long and short essays on ‘Energy-Efficient Motors’ especially written for school and college students. Essay on Energy-Efficient Motors Essay Contents: Essay on the Introduction to Energy-Efficient Motors Essay on the Benefits of Energy-Efficient Motors Essay on the Purchase of Energy-Efficient Motors [...]