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Transistor Relays

Transistor Relays: These are the most widely accepted type of static relays, so much so that when we say static relays, we can safely infer transistor relays only. The transistor…

Transductor Relay (Magnetic Amplifier Relay): Transductor Relay - Since relays now have to perform much more complicated functions, many types tend to become very complex mechanically, and hence costly, to…

Electronic Relays

Electronic Relays: Electronic Relays - These were the first to be developed in the series of static relays. They date back to early 1928 when Fitzgerald presented a carrier current…

Static Relays Basics and Classification

Static Relays Basics and Classification: A Static Relays Basics refers to a relay in which the measurement or comparison of electrical quantities is done in a static network which is…

Potential Transformer Tests

Potential Transformer Tests: The three Potential Transformer Tests are namely, Polarity check, Ratio check and Phasing check. Polarity check: Polarity check in Potential Transformer Tests is performed in the same…

Current Transformer Tests

Current Transformer Tests: Current Transformer Tests are generally mounted in the switchgear when it is delivered to site and may not be easily accessible. The normal tests which are carried…

General Methods of Testing Protective Gear

General Methods of Testing Protective Gear: The General Methods of Testing Protective Gear are namely, Primary Injection, Secondary Injection, Measurement of Time, Primary Injection: These tests are limited by the…

Heavy Current Test Plant

Heavy Current Test Plant: Heavy Current Test Plant - Simulating the exact fault conditions as would occur in practice is a difficult and a tedious job. The plant for providing…