The main components of a substation are Busbars Surge or Lightning Arresters Isolators or disconnecting switches Earth Switch Circuit Breaker Power Transformer Wave Trap Current Transformer Potential Transformer 1. Busbars It is a strip or bar of copper, brass or aluminium that conducts electricity within a switchboard of a substation. Its main purpose is to … Read more
Substation It is defined as the transmission and distribution network which receives electrical energy at a higher voltage and transfer to a consumer at low voltage. The points that should be kept in mind while setting Substations Substation should be located at a proper site as far as possible. Substation should be located at the … Read more
Everday we come across many electronic devices like radio, television, smartphone, computer, tablets, speakers, headphones, chargers, etc. All these devices are the source of radiated electromagnetic fields called radiated emissions. These radiated emissions are the accidental by-product of the device design. Electromagnetic Interference (EMI) It is the degradation in performance of a device due to fields … Read more
In the previous article, we learnt about HVDC Transmission System, its advantages and disadvantages. In this article, we will discuss the main components of HVDC Transmission System. The main components associated with HVDC system are as follows Converter Smoothing reactor Harmonic filters Reactive Power Supplies Electrodes DC lines AC Circuit Breaker 1. Converters They perform AC to … Read more
Q. Compare suitability of Si, SiC, GaN, and Sapphire being used for Modern Power Semiconductor Devices? Ans. S.No. Characterisitcs Si SiC (3H)/SiC (6H) GaN Sapphire 1. Energy gap at 300K (eV) 1.12 2.23/2.9 3.2 5.47 2. Maximum operating temperature (°C) 300 873/1240 600 1100 3. Mobility at 300 K — electron — Hole 1350 430 … Read more
S.No. Characterisitics Thyristor MOSFET IGBT 1. Type of Device Minority carrier Majority carrier Minority carrier 2. Rating very high Voltage, very high Current Medium Voltage, high Current high Voltage, high Current 3. Switching frequency low very high (~ MHz) high (~ 100kHz) 4. On-state drop low higher (increasing) low 5. On-state losses low considerable less … Read more
Uninterrupted Power Supply (UPS) is of three types. Offline UPS Offline preferred UPS Online UPS S.No. Parameters Offline UPS Offline Preferred UPS (Line interactive UPS) Online UPS 1. Type Sine wave or Quasi-sine wave sine wave sine wave 2. Voltage Mains/regulated voltage (±9%) Regulated voltage (±9%) Constant rated voltage 3. Frequency mains mains constant frequency … Read more
The data is transmitted from one place to other through different mediums. All transmission system has two devices i.e. transmitting and receiving end devices. These two devices are connected through a medium. there are two types of transmission i.e. Baseband transmission Broadband transmission Baseband transmission When data are sent without modulation, usually over wires or … Read more
In this article, we will learn about Sample and Hold (S/H) Circuit. These circuits are used in Analog to Digital (ADC) conversion and Switched Capacitor filters. Sample and hold circuits are used to sample an analog signal and to store its value for some length of time (for digital code conversion). Function of Sample & Hold … Read more
An inductor is an electronic device which stores energy in the form of magnetic field. It opposes the changes in the current passing through it. An inductor is just a coil of wire around some kind of core. The core could be just air or it could be a magnet. The amount of magnetic field … Read more