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Category 'Medium Voltage' - Technical Articles

The “Medium voltage” category is dedicated to technical articles about medium voltage, up to 35,000 V. This includes topics such as MV switchgear and its equipment (circuit breakers, disconnectors, earth disconnectors, protection relays, CTs, VTs, contactors, LV compartment, etc.), as well as testing and commissioning of MV switchgear. Special attention is given to testing and maintenance and challenges that engineers often face during the commissioning process.

Low Voltage

Failure cases of LV/MV electrical equipment and what should have been done (to avoid them)

Generally, the useful life of power system components heavily depends upon the level of care given to them and their duty cycles. For example, a circuit breaker on mainly switching duty can last 40 to max. 50 years. The majority…...

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Dec 19, 2022 | By

Failure cases of LV/MV electrical equipment and what should have been done (to avoid them)
Medium Voltage

Medium voltage switchgear: Important design considerations and applications

This technical article explains various aspects of the application of medium voltage switchgear and highlights the considerations for the selection of suitable circuit breakers for different applications. Medium voltage switchgear, commonly known as MV switchgear, play a significant role in…...

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Mar 14, 2022 | By

Medium voltage switchgear: Important design considerations and applications
Medium Voltage

The most popular wiring schemes and design essences of a Ring Main Unit (RMU)

In terms of operational requirements, it is pretty evident what a customer expects out of a Ring Main Unit – a hassle-free and uninterrupted distribution of power supply to electrical loads from one or more available sources. The onus is…...

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Feb 07, 2022 | By

The most popular wiring schemes and design essences of a Ring Main Unit (RMU)
High Voltage

MV/HV switchgear (circuit breaker) switching capability and suitability for specific applications

Circuit breakers (CBs) do interrupt fault currents and close onto faults. Besides, they could be used as isolation devices like disconnectors. The CBs manufacturers’ brochures and standards provide extensive data to select and assess the CBs performance, but designers must…...

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Jul 26, 2021 | By

MV/HV switchgear (circuit breaker) switching capability and suitability for specific applications
Low Voltage

Dos and don’ts in operating LV/MV circuit breakers, relays, disconnectors and fuses

Typically, protecting an electrical system, low-voltage, medium-voltage, or high-voltage, whichever it is, does not entirely depend upon a single component. The protection system is often a coordinated combination of multiple switching and protection units working in tandem to acquire the…...

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May 17, 2021 | By

Dos and don’ts in operating LV/MV circuit breakers, relays, disconnectors and fuses
Medium Voltage

Sizing of 110V DC charger for MV panels – Auxiliary power supply in power substations

An auxiliary DC power system that consists of a charger, battery bank, DC distribution system, and monitoring system is a critical part of the primary/secondary substation. It is directly associated with the mechanism of fault detection, trip coil operation, remote…...

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Feb 08, 2021 | By

Sizing of DC charger 110V (Auxiliary power supply used in primary/secondary substation) for MV panels
Medium Voltage

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

In the previous article, an introductory part of the switchgear control circuits, including DC/AC circuits and breaker closing circuit, was discussed thoroughly. This article continues the discussion with a breaker trip circuit, bay control-protection unit (BCPU) & alarm circuit, indication…...

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Dec 14, 2020 | By

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 are extremely important for troubleshooting practices. Furthermore, one has to…...

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This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.
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Nov 30, 2020 | By

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


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