Electric Motors Nameplate Data Explanation | NEMA

Electric Motor Nameplate DATA

All performance information for a motor is based on the motor being supplied by the power at the potential difference and frequency stated on the nameplate. A motor rating consists of the power output, speed, potential difference, and current specified by the manufacturer. A typical motor nameplate is shown below. It includes the following information, …

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What is Earthing? Why it’s important?

earthing or grounding

Definition Geographically speaking earth is the planet habituated by mankind. What then can earthing mean? In layman’s language, is it connecting non-current carrying conductive parts of equipment or an installation to the earth using a conductor. It also refers to connecting the neutral conductor of an electrical system to the earth. Earthing is widely used …

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What is Megger? Application & Operation

megger electrical device to measure high resistance

You may have heard of the word ‘mega’ in the measurement of various engineering parameters. One of those parameters is resistance, when it is in the range of millions of ohms it is called megaohms is its simplest definition a megger is a mega-ohmmeter, that is an instrument used to measure high resistance values. As …

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Pyrometer Used For?

pyrometer used for high temperature measuring e

One of the broad categories in engineering disciplines is instrumentation. Electrical, mechanical, and civil engineering heavily depend on instruments to control and monitor operations. One of the key parameters in engineering is temperature. Many devices have been invented to measure temperatures and one of them is a Pyrometer. A device is used to measure temperature …

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Lead-Acid Battery Working Advantages & Disadvantages

Lead Acid Battery

Outline A battery is an electrical device that stores chemical energy which can be converted to electrical energy. It is an energy storage device that produces electricity by connecting its terminals to an electrical gadget, appliance or machine. Two broad categories of batteries are; rechargeable and non-rechargeable types. It is key to note that a …

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Buchholz Relay Working Principle

Buchholz relay transformer protection

A relay is an electrical switch that controls a high voltage circuit using a low voltage source. Effectively. A relay electrically separates a low voltage circuit from a high voltage circuit. Most relays are actuated by sensors and hence commonly used in the control system. Buchholz relay is a special device that detects faults inside …

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What is Brushless DC Motor and Application?

brushless dc motor

The motor is indisputably one of the primary machines in electromechanical engineering. It is a machine that converts electrical energy into mechanical energy. When you see a moving system that uses electricity, the power to move is provided by a motor. Depending on the type of electrical power, there are AC motors and DC motors. …

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Potential Difference and Measuring Potential Difference

potential difference explanation

Potential Difference If electrons have greater potential energy at one place than at another, then a potential difference is said to exist between the two places. Potential difference is the difference in potential energy per unit of charge, between two points.In the metric system, potential energy is measured in joules. The charge is measured in …

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OHM’S LAW (Resistance and Voltage Drop)

ohm's law

OHM’S LAW There is a simple relationship between the current that flows through a conducting path and the potential difference between the ends of the path. As you increase the potential difference, the current increases, see the below circuit. The two values are proportional. That is, doubling the potential difference doubles the current. Tripling the …

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What is Electric Resistance? Unit and Symbol

electric resistance

When any material flows through a pipe, it meets opposition. The opposition comes from friction between the material and the inner surface of the pipe. The friction resists the flow of the material, and it produces heat. The same is true of electricity flowing in a conductor. The moving electrons meet opposition, and the opposition …

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