Distance Protection relay is a key component of electrical protection systems. It acts as a guardian, ensuring the power grid remains functional even in adverse conditions. Distance relay specifically focuses on the impedance of a transmission line and it is directional in nature. It plays a pivotal role in protecting power lines from faults, such … Read more
What do we understand by Power flow analysis? Power or load flow analysis helps in understanding how electrical power is distributed and balanced throughout the network.The primary objective of power flow analysis is to calculate the steady-state voltages, currents, and power flows in an electrical network under different operating conditions. It helps ensure that the … Read more
Electrical drawing of Tripping circuit implies the wiring diagram which is designed in a way that it will trip the circuit breaker either on some fault or manually through trip and close switch (TNC Switch). Different relays are used for protection and they are housed in control and relay panel and purpose of these relays … Read more
What is Impedance matching? It is the balance between the source and load impedance to ensure the load receives maximized power and it is very necessary for optimal flow of power between two interconnected devices. We know that Impedance combines both resistance (R) and reactance (X) and it is expressed as a complex number: Z … Read more
Electrical insulators are materials or devices designed to block the flow of electric current. They serve as barriers, preventing the conduction of electricity between conductive materials. This is achieved through their unique property of high electrical resistance. Types of Electrical Insulators No.of discs required for different voltage level can be calculated using the formula given … Read more
Electricity: Generation>Transmission>Distribution Before electricity reaches our Household ,it is first generated in generating stations then transmitted to Grid substations , then to Power substations and further it is distributed from power substations to consumer end. Most of the equipment which are used at consumer end uses low voltage to operate, but we step-up this voltage … Read more
What is a Local Breaker Backup (LBB) Protection? As the name suggests Local Breaker Backup (LBB) protection is used as backup protection in case of failure of circuit breaker , it is also called breaker failure relay. Normally when a fault occurs ,different protective relays sense the fault and send tripping command to master trip … Read more
Testing and commissioning of a circuit breaker is done in all plants before putting the circuit breaker on load i.e before start of its actual operation to ensure that it works properly as per its specification . What is a circuit breaker? A circuit breaker (C.B) is an electrical device which is used to break … Read more
What is a Potential transformer and capacitive voltage transformer, Is there a difference between the two? Potential transformer– Potential transformer is used for measurement as well as protection purpose of equipment in a substation. It’s purpose is to step down High Voltage to low voltage so that it can be easily read by measuring instruments, … Read more
What is a current transformer and How does a current transformer work? A current transformer (CT) is a device to measure electric current. The purpose of a current transformer is to transform high currents into lower, more manageable levels that can be easily measured and monitored through measuring instruments. It consists of a primary winding, … Read more
