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A Gas turbine is also called a combustion turbine is a type of continuous combustion, internal combustion engine which produces electric current. The gas turbine can operate using two types of fuel (dual fuel system) namely natural gas and oil, can also be operated…
The methods used for measurement of medium resistances are not suitable for measurement of low resistance. This is due to the fact that resistances of leads and contacts, though small, are appreciable in comparison to the low resistances under measurement. Voltmeter–Ammeter Method…
Current measurement is needed for devices such as the thermocouple-gauge pressure sensor and the ionization gauge that have an output in the form of a varying electrical current. Analogue meters are useful in applications where there is a need to display the…
A stepper motor is a small powered motor designed for tracking and positioning. The electromechanical actuator converts digital inputs into analog motion through the controller electronics. The normal stepper has accuracy 3-5% of step value without error accumulation. Most step motors are…
Optoisolators are a component that is used as a component of I / O control for equipment that operates with DC or AC voltage. An optocoupler consists of GaAs LEDs and NPN phototransistor made of silicon. In Figure a. optoisolator gets a…
Inverse Time Circuit Breakers Inverse time circuit breakers have both thermal and instantaneous trip features and are preset to trip at standardized levels. This is the most common type of circuit breaker used in the building trades for residential, commercial, and heavy…
In electronic circuits, there are many electronic symbols that are used to represent or identify a basic electronic or electrical device. They are mostly used to draw a circuit diagram and are standardized internationally by the IEEE standard (IEEE Std 315) and…
Introduction A vacuum circuit breaker is such kind of circuit breaker where the arc quenching takes place in vacuum. The technology is suitable for mainly medium voltage application. For higher voltage vacuum technology has been developed but not commercially viable. The operation…
Introduction First produced in 1996, the Quantum Tunneling Composite (QTC) is a composite material made from micron-sized particles conductive filler particles combined with a non-conducting elastomeric binder, typically silicone rubber. The unique method of combining these raw materials results in a composite…
Within a circuit it is often necessary to have different voltages at different stages and we can achieve this by using resistors. For example, if we physically opened up a resistor and connected its ends across a supply, we would find that,…
