Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

What is a Thermistor?Athermistor(orthermalresistor) is defined as atype of resistorwhoseelectrical resistancevaries with changes in temperature. Although all resistors’ resistance will fluctuate slightly with temperature, a thermistor is particularly sensitive to temperature changes.Thermistors act as a passive component in a circuit. They are an accurate, cheap, and robust way to measure temperature.While thermistors do not work well in extremely hot or cold temperatures, they are the sensor of

A thermopile is a device that converts heat into electricity by using the thermoelectric effect.It consists of several thermocouples, which are pairs of wires made of different metals that generate a voltage when exposed to a temperature difference. Thermocouples are connected in series or sometimes in parallel to form a thermopile, which produces a higher voltage output than a single thermocouple. Thermopiles are used for various applications, such as measuring temperature, generating power, an

What is a Bimetallic Strip Thermometer?A bimetallic strip thermometer is a device that uses the principle of different thermal expansion of solids to measure temperature. It consists of two metal strips (e.g., steel and brass) with different coefficients of thermal expansion, which are firmly joined together along their length. When the bimetallic strip is heated or cooled, it bends or twists due to the unequal expansion or contraction of the two metals. The amount of bending or twisting is prop

What is a Thermocouple?A thermocouple is a device that converts temperature differences into an electric voltage, based on the principle of the thermoelectric effect. It is a type of sensor that can measure temperature at a specific point or location. Thermocouples are widely used in various fields, such as industrial, domestic, commercial, and scientific applications, because of their simplicity, durability, low cost, and wide temperature range.What is the Thermoelectric Effect?The thermoelectr

What is a Watt Hour Meter?A Watt-hour meter is a measuring device that can evaluate and record the electrical power passing through a circuit at a certain time. By implementing a Watt-hour meter, we can know how much electrical energy is used by a home, business, or an electrically powered device. Electrical utilities install watt-hour meters at their consumer’s premises to evaluate their electrical usage (for billing purposes).The reading is taken in each billing period. Usually, the billing un

Energy meters are the basic part to measure the power consumption. It is used everywhere, no matter how big or small consumption it is. It is also known as watt-hour meter. Here we discuss the construction and working principle of induction type energy meter.To understand the structure of watt-hour meter, we must understand the four essential components of the meter. These components are as follows: Driving system Moving system Braking system Registering systemDriving SystemThe components of thi

We cannot think of life without electricity and when there is electricity consumption there is a need to measure its consumption. Here energy meter comes into picture. In every residence, malls, industry, everywhere energy meters are used to measure the electrical energy consumed. Those consumers which consume large energy needs better technology to manage their energy consumption and need more data to improve their services. Improvement in energy meter technology has increased the value-added f

We know that in induction type energy meters, in order to maintain speed of rotation proportional to power “The phase angle between supply voltage and pressure coil flux should be equal to 90o“. However in actual practice, the angle between supply voltage and pressure coil flux is exactly not 90o but few degrees less. Therefore, some lag adjustment devices are used for adjustment of lag angle. Let us consider the figure given beside:In the beside figure we have introduced another coil which is l

Electrical energy is a fundamental concept in physics and engineering, as well as a practical necessity for everyday life. Electrical energy is the amount of work that can be done by an electric current, or the amount of heat that can be produced by an electric resistance. Electrical energy is also related to electrical power, which is the rate of energy transfer per unit time. In this article, we will explain what electrical energy is, how it is measured, what units are used for it, and how to

Schering Bridge TheoryThis bridge is used to measure to the capacitance of the capacitor, dissipation factor and measurement of relative permittivity. Let us consider the circuit of Schering bridge as shown below:Here, c1 is the unknown capacitance whose value is to be determined with series electrical resistance r1.c2 is a standard capacitor.c4 is a variable capacitor.r3 is a pure resistor (i.e. non inductive in nature).And r4 is a variable non inductive resistor connected in parallel with vari