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Mastering single line and wiring diagrams: Using circuit breaker for MV power...
Within this article, custom made cubicle intended for supply and protection of MV reactive power compensation block, will be analyzed. Technical characteristics of major electrical components,...
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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... Read more The post Switching...
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My experience in the design and installation of medium voltage switchgears
Medium Voltage (MV) switchgear is typically any switchgear over 1000V in the United States (US). Some of the nominal voltage ratings used in the US by power utilities are 2.4-4.16kV,... Read more The...
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The most common issues I experienced in wiring of a medium voltage switchgear
Nowadays, the design and manufacturing of a Medium Voltage switchgear is not an easy task. Many factors could affect the generation of an optimal set of engineering drawings to be... Read more The...
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Primary rated values for medium voltage switchgear often mixed by engineers
It’s not unusual to see that engineers mix terms of primary ratings. If they are not understood well, yes, it’s possible to mix some of them. But it’s essential to... Read more The post Primary rated...
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My experience and guidance in the design and electrification of a modern airport
The electrical systems for airports require proper quality installations and consideration for features usually not involved in other electrical installations. In this article, we will be discussing...
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A case study of fault level calculations for a MV/LV network using direct method
This technical article represents the case study of fault level calculations for an MV/LV network using the direct method. There are many advantages of the direct approach, and the main... Read more...
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Installation guidelines for MV metal-enclosed switchgear and controlgear (IEC...
What does it mean ‘metal-enclosed switchgear’? Metal-enclosed switchgear and controlgear are generally assembled from type-tested panels. As per IEC 62271-200 metal-enclosed switchgear installations...
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Secondary LV/MV distribution substations in a nutshell (connections and types)
The general method of supplying bulk power to buildings, factories or other complexes is by means of an MV supply, usually at 10 kV, occasionally at 6.6 kV. The installation... Read more The post...
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My experience in the first synchronization of the MV generator in an...
Any power plant commissioning, from small industrial GTG to nuclear facility, will converge to a very final step before (provisional) commercial operation, sometimes empathized as “first kW”:...
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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... Read...
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Guide to erection and commissioning of MV/HV switchgears (Inspection,...
Erection and commissioning of MV/HV switchgear are quite complex and full of tiny little details that can easily make your project slow down or even stop. Not to mention deadlines... Read more The...
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Testing and commissioning of MV/HV switchgears (wiring, final inspection and...
This article continues the series of articles dedicated to erection, testing and commissioning of MV/HV switchgears by describing the most important precautions and recommendations in various...
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My experience in drafting the layout & arrangement drawing of 33/11 kV...
Medium voltage substations fall within the sub-transmission power system category, which feeds the bulk consumers directly or facilitates the secondary and tertiary distribution to small industrial...
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Mastering switchgear control circuits – AC/DC circuits and circuit breaker...
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...
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Mastering switchgear control circuits: trip, BCPU and alarm, indication, and...
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...
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Sizing of 110V DC charger for MV panels – Auxiliary power supply in power...
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...
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The essentials of automation applied to distribution systems via PLCs, SCADA,...
Nowadays, it seems that everything we do tend to be somehow automated. The very same is happening in electrical distribution systems. The distribution system at the medium voltage (MV) or... Read more...
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Dos and don’ts in operating LV/MV circuit breakers, relays, disconnectors and...
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...
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Distribution earthing systems in LV/MV networks (design instructions and...
The electrical earthing system is designed to provide safe and correct operation of the network under normal, earth fault, and transient conditions. During earth fault conditions, large fault currents...
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