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Showing 1-9 of 25 results
Transmission-switching

Why Do We Use Transmission Switching in Electricity Supplies?

  • Categories Power System, Circuit Breaker, Electrical Relays, Switchgear, Transmission Line

A transmission switching system is an essential component of the electricity supply network. It enables electricity transmission from one line to another for end users. It also helps ensure that …

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Principle of core balance protection RCCB working

How RCCB/ELCB Protects You from Death?

  • Categories Power System, Circuit Breaker, Electrical Relays, Measurement, Switchgear

Earthing does not guarantee that humans will be safe when they come into contact with live conductors. Although relays may be installed to detect earth leakages, typically their settings are …

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Types 2Bof 2BProtective 2BRelays

Classification or Types of Protective Relays

  • Categories Power System, Electrical 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 …

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motor control center

What are Motor Control Centres?

  • Categories Power System, Circuit Breaker, Electrical Relays, Synchronous Motor, Three Phase Induction Motor

The Motor Control Centre is 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 …

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overcurrent relay

Overcurrent Relays for Transmission Line Protection

  • Categories Power System, Electrical Relays

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,  …

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Gas insulated switchgear parts

Introduction to Gas Insulated Substations / Switchgears (GIS)

  • Categories Power System, Circuit Breaker, Electrical Relays, Substation, Switchgear, Transformer

Gas-insulated substations (GIS) have been used in power systems over the last three decades because of their high reliability, easy maintenance, small ground space requirement, etc. This article is an …

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Low voltage Switchgear

Low Voltage Switchgear

  • Categories Switchgear, Circuit Breaker, Electrical Relays, Generation, Instrumentation, Measurement, Power System, Substation

As per IEC 60947, switchgears with rated voltages up to 1000 V ac and 1500 V dc are termed as low voltage switchgear. The term ‘switchgear’ is a generic term …

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relay time opt

Instantaneous, Inverse Time and Definite Time Lag Relays

  • Categories Power System, Electrical Relays

In this post, we will explain Instantaneous, Inverse Time and Definite Time Lag Relays and their characteristics. An important characteristic of a relay is its time of operation. By ‘the time …

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substation earthing

Substation Earthing System Design

  • Categories Power System, Basic Electrical, Circuit Breaker, Electrical Relays, Generation, Substation, Switchgear, Transformer

We have already given an introduction to substation earthing system in an article published earlier. Today we are going to discuss the design of substation earthing system. Before 1960s the …

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