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Showing 10-18 of 36 results
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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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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all day efficiency of transformer

All Day Efficiency of Transformer

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

The ratio of output in kWh to the input in kWh of a transformer over a 24-hour period is known as all day efficiency. The ordinary or commercial efficiency of …

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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 …

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load forecasting in power system

Load Forecasting – Purpose, Classification and Procedure

  • Categories Power System, Alternator, Basic Electrical, Generation, Measurement, Substation, Switchgear, Transformer

What is Load Forecasting? Electrical energy cannot currently be stored in large amounts. It has to be generated whenever there is a demand for it. It is, therefore, imperative for …

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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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Metal Clad Switchgear

Low Voltage Circuit Breakers – Design and Construction Basics

  • Categories Power System, Circuit Breaker, Switchgear

In this article, we are going to study the basics of low voltage circuit breaker design and construction. The operation and arc extinction of different types of circuit breakers were …

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