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Archive: Category «Transformers»

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Starting Motor With Auto-transformer

An auto-transformer starter makes it possible to start squirrel-cage induction motors with reduced starting current, as the voltage across the motor is reduced during starting. In contrast to the star-delta… Read more

Mar 18, 2013 | Edvard

Starting Motor With Auto-transformer

An Overview Of Short Circuit Current (part 3)

Continued from previous technical article: An Overview Of Short Circuit Current (part 2) Fault calculations are carried out to find the magnitude of fault current at various voltage levels of… Read more

Mar 08, 2013 | Asif Eqbal

An Overview Of Short Circuit Current (part 3)

What is transformer rating based on?

In the U.S., transformers are rated based on the power output they are capable of delivering continuously at a specified rated voltage and frequency under “usual” operating conditions without exceeding… Read more

Jan 30, 2013 | Edvard

What is transformer rating based on?

D.M.C.R. Protection Relay for Oil Transformer

Introduction to D.M.C.R. Faults detected on live transformer unit: Dielectric fluid level is detected as low Overheating is detected Excess pressure is detected Standards Possibilities of D.M.C.R.: Oil level control… Read more

Jan 16, 2013 | Edvard

DMCR - Detection, Measurement and Control Relay for Hermetically Sealed Oil Transformer

How Power Transformer Produces Acoustical Noise?

This technical article explains the acoustic noise generating mechanism inside power transformers. Transformer noise has two sources: winding vibrations and core vibrations. The single most effective way to reduce windings noise… Read more

Dec 05, 2012 | Edvard

How Power Transformer Produces Acoustical Noise?

The Purpose Of Transformer Gas Relay

The transformer gas relay is a protective device installed on the top of oil-filled transformers. It performs two functions. It detects the slow accumulation of gases, providing an alarm after a… Read more

Nov 29, 2012 | Edvard

The Purpose Of Transformer Gas Relay
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