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Category 'Protection' - Technical Articles

“Protection” category refers to technical articles dedicated to relay protection of various power substation and transmission & distribution equipment, such as low- medium- and high-voltage switchgear, transformers, capacitor banks, cables, transmission lines, electric motors and generators, and so on. Great attention is paid on circuit breaker schematics, such as tripping, closing and blocking coil arrangements, etc.

Cables

The essential HV/EHV substation auxiliary facilities you should know about

Nowadays, HV/EHV substations have become pretty complex from the design point of view. Besides the main electrical equipment, which must be designed and selected correctly, there are several auxiliary facilities without which a substation would not be able to operate…...

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Apr 27, 2020 | By

The essential HV/EHV substation auxiliary facilities you should know about
Premium Content

Practical tips for the protection of generators and power transformers

There are usually several ways of protecting HV/MV generators and transformers. It should be noted that one protection relay is often used for several functions, for example, an overcurrent relay can be used for both overcurrent and earth fault protection…....

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Apr 17, 2020 | By

Practical tips for the protection of generators and power transformers
Medium Voltage

Switching devices you are likely to spot in every medium voltage switchgear

Up to and including 52 kV voltage range is generally referred to as “medium voltage”. This technical article shed some light on a few devices you are likely to spot in most of the medium voltage switchgear. But, before diving…...

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Apr 13, 2020 | By

Switching devices you are likely to spot in every medium voltage switchgear
Medium Voltage

Mastering single line and wiring diagrams: Using circuit breaker for MV power factor correction

Within this article, a custom-made cubicle intended for supply and protection of MV reactive power compensation block will be analyzed. Technical characteristics of major electrical components, together with three line and wiring diagrams, will be shown, while some specific aspects…...

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Apr 09, 2020 | By

Mastering single line and wiring diagrams: Using circuit breaker for MV power factor correction
Medium Voltage

Mastering single line and wiring diagrams: MV earth fault protection

This technical article continues the series of articles dedicated to mastering single line and wiring diagrams of medium voltage switchgear. This time, the subject is the principle, and realization of earth fault protection applied to the same example switchgear used…...

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Mar 26, 2020 | By

Mastering single line and wiring diagrams: MV earth fault protection
Medium Voltage

Learn how to interpret interlocking schemes between MV cubicles (single line and wiring diagrams)

There are numerous variations of MV switchgear topology, measurement, and control logic. However, there are also some basic rules related to these aspects which may be frequently seen in practice, with the purpose of increased safety and reliability during operation…....

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Mar 12, 2020 | By

Mastering single line and wiring diagrams: Interlocking between MV cubicles
Energy and Power

When can we say that earthing arrangement is safe for people (confusions in practice)

This article will analyse some of the most important safety issues related to design and use of LV electrical installations. Besides explanation of relevant terms in this field defined by IEC standards, some misinterpretations and confusions which may be seen…...

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Feb 28, 2020 | By

When can we say that earthing arrangement is safe for people (confusions in practice)
Electric Motor

The art of designing the auxiliary system of a power plant

Power plant auxiliary system is usually pretty complicated and consists of dozen of motors, transformers, capacitor banks, variable frequency drives, PLCs, and other electrical devices. Therefore, protection relaying cannot be simple, and it requires special attention for each component of… Read more

Feb 24, 2020 | By

The art of designing the auxiliary system of a power plant


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