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Author Archive for: Salem Alshahrani

Salem Alshahrani

8 awesome technical articles

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Electrical engineer (BEE & Meng). Specialized in substation design, especially in LV/MV switchgears and transformers. Passionate in power system planning, analysis, and stability studies.

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Power Substation ♛

My advice in successful reading single-line, schematic, P&ID, logic, and wiring diagrams

Engineering tasks require a good skill in reading and interpreting information on drawings. Engineering drawings are the industry cornerstone of conveying detailed and precise information on how to construct, troubleshoot,…...

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Apr 05, 2021 | By Salem Alshahrani

My advice in successful reading single-line, schematic, P&ID, logic, and wiring diagrams
Power Substation ♛

The mystery of nuisance tripping incidents in transformer protection that worry engineers

This technical article deals with transformer failure incidents due to nuisance tripping caused by various design flaws, operational conditions, or improper protection relay settings. The focus is on differential protection…...

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Feb 22, 2021 | By Salem Alshahrani

The mystery of nuisance tripping incidents in transformer protection that worry engineers
Power Substation ♛

Learn how to read and analyze control circuits of MV gas insulated switchgear (GIS)

Previously, an introductory part of the GIS and its components were discussed to pave the way for the GIS control circuits. Moreover, the single-line diagram example for a double-bus and…...

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Jan 25, 2021 | By Salem Alshahrani

Learn how to read and analyze control circuits of MV gas insulated switchgear (GIS)
Power Substation ♛

Mastering GIS control circuits: AC/DC auxiliary circuits and circuit breaker closing circuit

A gas-insulated substation (GIS) is usually utilized in high voltage applications in which all conductive parts are encapsulated in sealed cylinders with SF6 as the insulating medium. The air-insulated substation…...

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Jan 11, 2021 | By Salem Alshahrani

Mastering GIS control circuits – AC/DC auxiliary circuits and circuit breaker closing circuit
Medium Voltage ♛

Mastering switchgear control circuits: trip, BCPU and alarm, indication, and interlock circuits

In the last article, an introductory part of the switchgear control circuits, including DC/AC circuit and breaker closing circuit, was discussed thoroughly. This article continues the discussion with a breaker…...

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Dec 14, 2020 | By Salem Alshahrani

Mastering switchgear control circuits: trip, BCPU and alarm, indication, and interlock circuits
Medium Voltage ♛

Mastering switchgear control circuits – AC/DC circuits and circuit breaker closing circuit

Control circuits are vital to the operation of medium voltage switchgear. The integrity of these control circuits is essential to the switchgear’s proper operation, so commissioning and maintenance activities records…...

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Nov 30, 2020 | By Salem Alshahrani

Mastering switchgear control circuits – AC/DC circuits and circuit breaker closing circuit
Electric Motor ♛

Mastering Motor Control Center (MCC): Wiring diagrams and equipment from zero to hero

Motor control center (MCC) was introduced back in 1937 to place different motor starters in one cabinet to save space. It is a modular cabinet that supplies and controls motors,…...

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Nov 02, 2020 | By Salem Alshahrani

Mastering Motor Control Center (MCC): Wiring diagrams and equipment from zero to hero
Medium Voltage ♛

How hard can be analyzing MV switchgear wiring diagrams and single line diagram

The capability of reading different types of drawings is an essential skill to perform almost all of the engineering tasks. The engineering drawings form the building blocks of industry method…...

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Oct 05, 2020 | By Salem Alshahrani

How hard can be analyzing MV switchgear wiring diagrams and single line diagram


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