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Archive: Category «Transformers»

Transformers

Purpose of Shielded Isolation Transformer

A shielded transformer is a two-winding transformer, usually delta–star connected and serves the following purposes: – Voltage transformation from the distribution voltage to the equipment’s utilization voltage. – Converting a 3-wire… Read more

Aug 29, 2012 | By Edvard Csanyi

Using shielded isolation transformer in power distribution systems
Transformers

Power Transformer Construction – Windings

Continued from tech. article: Power Transformer Construction – Core The windings consist of the current-carrying conductors wound around the sections of the core, and these must be properly insulated, supported and… Read more

Aug 24, 2012 | By Edvard Csanyi

750kVA dry type transformer windings
Transformers

Power Transformer Construction – The Core

The construction of a power transformer varies throughout the industry. The basic arrangement is essentially the same and has seen little significant change in recent years, so some ofthe variations… Read more

Aug 23, 2012 | By Edvard Csanyi

Power Transformer Construction - Core
Protection

Protecting Oil Type Transformer with Buchholz Relay

Buchholz relay is a gas-actuated relay installed in oil immersed transformers for protection against all kinds of faults. Named afteri ts inventor mr. Max Buchholz (1875–1956) in 1921, relay is used… Read more

Aug 16, 2012 | By Edvard Csanyi

Protecting Oil Type Transformer with Buchholz Relay
Energy and Power

Principles of Transformers in Parallel Connection

For supplying a load in excess of the rating of an existing transformer, two or more transformers may be connected in parallel with the existing transformer. The transformers are connected… Read more

Aug 06, 2012 | By jiguparmar

Principles of Transformers in Parallel Connection (Part 1)
Energy and Power

Delta-Star Transformer Connection Overview

In this type of connection, the primary connected in delta fashion while the secondary current is connected in star. The main use of this connection is to step up the… Read more

Jul 10, 2012 | By jiguparmar

GE Transformer delta-star nameplate
Energy and Power

Delta-Delta Transformer Connection Overview

In this type of connection, both the three phase primary and secondary windings are connected in delta as shown in the Figure 1: The voltages on primary and secondary sides… Read more

Jul 06, 2012 | By jiguparmar

Delta-Delta Transformer Connection Overview
Power Substation

Typical noise levels in power substation

Equipment noise levels may be obtained from manufacturers, equipment tendering documents, or test results. The noise level of a substation power transformer is a function of the MVA and BIL… Read more

Jul 05, 2012 | By Edvard Csanyi

Typical noise levels in power substation
Energy and Power

Autotransformer Connection Explained

An ordinary transformer consists of two windings called primary winding and secondary winding. These two windings are magnetically coupled and electrically isolated. But the transformer in which a part of… Read more

Jul 02, 2012 | By jiguparmar

High efficiency autotransformer with 6%, 4%, 2% tap settings
Transformers

Transformer Extra Losses Due To Harmonics

Non-linear loads, such as power electronic devices, such as variable speed drives on motor systems, computers, UPS systems, TV sets and compact fluorescent lamps, cause harmonic currents on the network…. Read more

Jun 22, 2012 | By Edvard Csanyi

Transformer Extra Losses Due To Harmonics
Transformers

ZigZag Transformer Connection Overview

The zigzag connection of tranformer is also called the interconnected star connection.  This connection has some of the features of the Y and the ∆ connections, combining the advantages of… Read more

Jun 15, 2012 | By jiguparmar

Zigzag Grounding Transformer
Transformers

Scott-T Transformer Connection Overview

There are two main reasons for the need to transform from three phases to two phases: to give a supply to an existing two phase system from a three phase… Read more

Jun 12, 2012 | By jiguparmar

Largest furnace transformer with 105-MVA capacity manufactured at Siemens transformer factory in Dresden
Transformers

Star-Delta Transformer Connection Overview

In this type of transformer connection, then primary is connected in star fashion while the secondary is connected in delta fashion as shown in the Figure 1 below. The voltages… Read more

Jun 10, 2012 | By jiguparmar

General Electric power transformer nameplate (50 MVA Substation Power Transformer with Load Tap Changer)


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