An electrical substation is an installation with electrical equipment capable of interrupting or establishing electrical circuits and changing the voltage, frequency, or other characteristics of the electrical energy flowing in the circuits. The substation provides interconnection of transmission circuits and transformation between the network of different voltages. The … [Read more...] about Electrical Substation: Equipment, Types, Components & Functions
Electrical Relays
Bundled Conductors in Transmission Lines
The combination of more than one conductor per phase in parallel suitably spaced from each other used in an overhead transmission line is defined as a bundled conductor. The individual conductor in a bundle is defined as a sub conductor. Bundled conductors in transmission lines are commonly used to increase electrical capacity and reduce corona and radio noise at voltages … [Read more...] about Bundled Conductors in Transmission Lines
Classification or Types of Protective Relays
The IEEE defines protective relays as: “relays whose function is to detect defective lines or apparatus or other power system conditions of an abnormal or dangerous nature and to initiate appropriate control circuit action ”. Relays detect and locate faults by measuring electrical quantities in the power system which are different during normal and … [Read more...] about Classification or Types of Protective Relays
What are Motor Control Centres?
The terms ‘Switchgear’ and ‘Motor Control Centres’ are used in general to describe combinations of enclosures, busbars, circuit breakers, power contactors, power fuses, protective relays, controls and indicating devices.Read more about switchgear here What is Switchgear? | Features, Components and ClassificationThe standards used in Europe often refer to IEC60050 for … [Read more...] about What are Motor Control Centres?
Overcurrent Relays for Transmission Line Protection
The use of overcurrent relays is the simplest and cheapest type of line protection. Three types of overcurrent relays are used: Inverse time delay overcurrent (TDOC) relays, Instantaneous overcurrent relays, Directional overcurrent relays. In general, overcurrent relays are difficult to implement where coordination, selectivity, and speed are important. They … [Read more...] about Overcurrent Relays for Transmission Line Protection