Search

Premium Membership ♕

Limited Time Offer: Save 15% on PRO Plan with discount code: LRN15 and study specialized LV/MV/HV technical articles and studies.

Archive: Category «Transformers»

Energy and Power

Understanding Vector Group of Transformer (2)

Continued from first part Understanding Vector Group of Transformer (part 1) Vector Groups are the IEC method of categorizing the primary and secondary winding configurations of 3-phase transformers. Windings can… Read more

Jun 04, 2012 | By jiguparmar

220kV Class 110kV Class Single Phase Traction Transformer
Electrical Lectures

Understanding Vector Group of Transformer (Part 1)

Three phase transformer consists of three sets of primary windings, one for each phase, and three sets of secondary windings wound on the same iron core. Separate single-phase transformers can… Read more

Jun 03, 2012 | By jiguparmar

Understanding Vector Group of Transformer (Part 1)
Power Substation

Transformer Connection Star-Star

The windings of three phase transformers may be connected in by Y or Δ in the same manner as for three single phase transformer. Since the secondary’s may be connected either… Read more

May 23, 2012 | By jiguparmar

Dry type cast resin transformer
Energy and Power

Special considerations when selecting transformer protection

Current transformer ratio selection and performance require special attention when applying transformer protection. Unique factors associated with transformers, including its winding ratios, magnetizing inrush current, and the presence of winding… Read more

May 19, 2012 | By Edvard Csanyi

Dry-type power transformers 11/0.42kV 2000kVA
Energy and Power

Introduction to instrument transformers

Instrument transformers (ITs) are designed to transform voltage of current from the high values in the transmission and distribution systems to the low values that can be utilized by low… Read more

May 14, 2012 | By Edvard Csanyi

Instrument transformers - ABB
Transformers

What is the best transformer coolant?

One of the main sources of losses and reasons for temperature rise in various parts of a transformer are the magnetic circuit and windings. So what are the actually reasons… Read more

Apr 20, 2012 | By Edvard Csanyi

What is the best transformer coolant?
Maintenance

Sudden pressure relay in oil-filled power transformer

Internal arcing in an oil-filled power transformer can instantly vaporize surrounding oil, generating gas pressures that can cause catastrophic failure, rupture the tank, and spread flaming oil over a large… Read more

Mar 08, 2012 | By Edvard Csanyi

Figure 1 - Sudden pressure relay in oil-filled power transformer
Metering

Voltage Instrument Transformer (VT) – Introduction

Instrument transformers are primarily used to provide isolation between the main primary circuit and the secondary control and measuring devices. This isolation is achieved by magnetically coupling the two circuits…. Read more

Feb 20, 2012 | By Edvard Csanyi

Voltage Transformer (VT) - Introduction And Purpose
Maintenance

Purpose and maintenance of transformer bushings

The two most common types of bushings used on transformers as main lead entrances are solid porcelain bushings on smaller transformers and oil-filled condenser bushings on larger transformers. Solid porcelain… Read more

Feb 05, 2012 | By Edvard Csanyi

Transformer porcelain bushings spare parts
Transformers

12 Main Classes Of Power Transformer

Transformers are used for a wide variety of purposes, with the complete range of voltage and power ratings as well as many special features for particular applications. The following covers… Read more

Jan 08, 2012 | By Edvard Csanyi

SIEMENS - View of the main production hall of the Nuremberg transformer plant.
Protection

Transformer Protection – Abstract from NEC

According to NEC 450.4, “each transformer 600 volts, nominal, or less shall be protected by an individual overcurrent device installed in series with each ungrounded input conductor.” Such overcurrent device… Read more

Dec 26, 2011 | By jiguparmar

Transformer protection - Aabstract from NEC (National Electric Code)
Power Substation

Why and how much for fire protection of power plant?

Fire protection measures can be subdivided into life-safety and investment categories. Life-safety measures are considered to be mandatory by  fire codes, building codes, or safety codes. As such, the codes… Read more

Dec 07, 2011 | By Edvard Csanyi

Protection

Transformer and Transformer-Feeder Protection

The development of modern power systems has been reflected in the advances in transformer design. This has resulted in a wide range of transformers with sizes ranging from a few… Read more

Nov 30, 2011 | By Edvard Csanyi

VAMP transformer protection relay


Learn How to Design Power Systems

Learn to design LV/MV/HV power systems through professional video courses. Lifetime access. Enjoy learning!

Subscribe to Weekly Newsletter

Subscribe to our Weekly Digest newsletter and receive free updates on new technical articles, video courses and guides (PDF).
EEP Academy Courses - A hand crafted cutting-edge electrical engineering knowledge