Archive: Category «Protection»

Overvoltages in the IT system

Electrical networks can be subject to overvoltages of varying origins. Some overvoltages, such as differential mode ones (between live conductors) affect all the earthing systems. This section is particularly concerned… Read more

Jul 26, 2012 | Edvard

Single insulation fault on a network operated in IT earthed system

Effect of Lightning Strike on Electrical Lines

The foregoing discussion concentrated on the principles of lightning strikes and how their effects can be mitigated. However, lightning strikes on electrical lines or substations are those that cause problems… Read more

Jul 20, 2012 | Edvard

Effect of lightning strike on electrical lines

Thermal (Overload) Motor Relay Protection

The majority of winding failures in motor are either indirectly or directly caused by overloading (either prolonged or cyclic), operation on unbalanced supply voltage, or single phasing, which all lead… Read more

Jul 14, 2012 | Edvard

Thermal (Overload) Motor Relay Protection

MCB – Miniature Circuit Breaker Construction

The miniature circuit breaker (MCB) plays an important role in providing overcurrent protection and a disconnect means in electrical networks. Recent advancements in circuit breaker technology has increased breaker performance and protection. A… Read more

Jun 07, 2012 | Edvard

MCB - Miniature circuit breaker construction

Protection Of Generators And Transformers

As Generators and transformers are major components of a power system, so it is quite necessary to take all the preventive measures for the protection of transformers and generators. These… Read more

Feb 11, 2012 | Bipul Raman

Protection of generators and transformers (Siprotec numerical protection relays)

Ceramic (Porcelain and Glass) Insulators

Porcelain is the most frequently used material for insulators. Insulators are made of wet, processed porcelain. The fundamental materials used are a mixture of feldspar (35%), china clay (28%), flint… Read more

Jan 27, 2012 | Edvard

Porcelain insulators collection

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