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    Showing 1-16 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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    fundamental requirements of protective relaying

    Basic Relays – Electromagnetic Attraction and Induction Relays

    • Categories Power System, Electrical Relays, Substation, Switchgear

    Most of the relays used in the power system operate by virtue of the current and/or voltage supplied by current and voltage transformers connected in various combinations to the system …

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    Solid State Relay

    Solid State Relays (Static Relays)

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

    What is a Static Relay? There are two basic classifications of relays – Electromechanical Relays and Solid State Relays (Static relay). One main difference between them is electromechanical relays have …

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    protective zones in power system

    Protective Zones in Power Systems

    • Categories Electrical Relays, Power System

    In this post, we will look into protective zones in the power system and why they are overlapped. What is a Protective Zone in Power System? A protective zone is …

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    Substation Relay

    Basics of Protective Relaying in Power System

    • Categories Electrical Relays, Power System

    Protective relaying is necessary with almost every electrical plant, and no part of the power system is left unprotected. The choice of protection depends upon several aspects such as type …

    Read More
    back up protection

    Primary and Back-up Protection in Power System

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

    Primary and Back-up Protection Primary protection (Main protection) is the essential protection provided for protecting an equivalent/machine or a part of the power system. As a precautionary measure, addition protection …

    Read More
    types of electrical relays

    Types of Electrical Relays

    • Categories Switchgear, Circuit Breaker, Electrical Relays

    We have already discussed the working of electrical relays. Now we are going through different types of electrical relays. There are two basic classifications of relays: Electromechanical Relays Solid State …

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    fUNCTION OF PROTECTIVE RELAYS

    Function of Protective Relays in Power System

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

    We usually think of an electric power system in terms of its more impressive parts – the big generating stations, transformers, high-voltage lines, etc. While these are some of the basic elements, …

    Read More
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    27Dec2014

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