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Why is both RTD temperature and thermal overload protection needed?

RTD basics A fundamental physical property of a metal is that its resistivity changes with temperature. For many metals, this…

Protection relay codes

Introduction: Numerical codes are sometimes used when defining the protection relay, whereas in other cases symbols are used. The numerical…

All About Buchholz Relay

Whenever a fault in the transformer develops slowly, heat is produced locally, which begins to decompose solid of liquid-insulated materials…

All About Induction Machines

Introduction Induction machines, also called asynchronous machines, can be used as generators or motors. Induction machines can be either of…

Power Factor Correction: Methods Explained

The main means for the generation of reactive power are: • synchronous alternators; • synchronous compensators (SC); • static var…

Switchgear and Protection Short Question Answer

INTRODUCTION Switchgear and protection is one of the most important topic in electrical and power engineering. All the electrical machines…

Philosophy of Protection System Settings

The objectives  of the protection system are: –  limit damage to people and to the plant; –  permit different  service…

Electrical characteristics

(Peak) making current: The peak value of the first major loop of the current in one pole of a switching…

Three Phase Transformers Basics

A three phase transformer is used to generate and transmit a large amount of power. Three phase step up and…

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