Munif Al Shamri , CMRP’s Post

A Ring Main Unit (RMU) is a compact, sealed unit used in medium voltage electrical distribution networks. It consists of a ring of switchgear that allows for the distribution of electricity from multiple sources to multiple destinations. RMUs are commonly used in urban areas where space is limited, providing efficient and reliable power distribution while minimizing the risk of electrical faults. They play a crucial role in ensuring continuous electricity supply and enabling quick restoration of power in case of disruptions or maintenance activities.

A Ring Main Unit (RMU) is a type of compact, enclosed and modular gas-insulated switchgear (GIS) used in medium voltage (MV) electrical distribution networks. It serves as a key component in the distribution of electrical power within urban and industrial areas. The term "ring" in Ring Main Unit refers to the network topology where the electrical distribution is configured in the shape of a ring or loop.

🔌 What is RMU and Its Types? 🔌 In the world of electrical distribution, Ring Main Units (RMUs) play a crucial role in ensuring the reliable and safe distribution of power. But what exactly is an RMU? 📌 What is RMU? A Ring Main Unit (RMU) is a type of electrical switchgear used in medium-voltage power distribution networks. It is primarily used to ensure continuous power supply by creating a ring-like network, allowing power to be rerouted in case of a fault. 🔍 Types of RMUs: Gas-Insulated RMU: These RMUs are compact and reliable, using SF6 gas to insulate the internal components. They are known for their durability and minimal maintenance requirements. Air-Insulated RMU: These RMUs use air as the insulating medium. They are generally more cost-effective and are used in outdoor installations where space is not a constraint. Solid-Insulated RMU: This type uses solid materials as the insulation medium. It is environmentally friendly and offers excellent performance in harsh conditions. RMUs are essential in modern electrical networks, ensuring efficient power distribution and minimizing downtime. Understanding the different types helps in choosing the right solution for your specific needs. #ElectricalEngineering #PowerDistribution #RMU #Switchgear #EnergySolutions

When you look at this project, it may be a simple and routine project, but I have to admit that it was one of the most challenging and difficult projects that we have done in the last few years, The first challenge Generator and busbar voltage level . . It was 3.3 kV and voltage transformer(PT) is not easily found at this level. The second challenge was the layout and topology of the existing network and it was not possible to change it. generator PT 3.3kv/100 generator bus PT 6kv/100 mains PT 20kv/100 common bus PT 3.3kv/100 Also we use current transformers for the mains controller in 20kv side with phase compensation option. who know what's Wrap busbar option? we use it in this project ☺️ BTB without controller: The power management system monitors the external controlled BTB feedbacks and responds to changes in the breaker position. For example, when the BTB is opened, power management detects that there are new busbar sections. we use it in this project ☺️ Deif AGC 150 Genset, Mains,BTB Deif CIO 116, CIO 208, CIO 308 Comap EP300 I think we could not have done this project without DEIF controller 😎

Comparing a GIS substation with 7 bays to this remarkably compact volume where all the equipment is housed is unbelievably astounding. It's simply inconceivable to think of installing 7 bays of AIS type in such small dimensions. However, despite all the advantages of GIS substations, their environmental impact remains a challenge, and this single sentence speaks volumes about their environmental impact. Every kilogram of SF6 gas released into the atmosphere is equivalent to 32,500 kg of CO2. Although the European Union has established very important laws and protocols in this regard, and everyone is obliged to comply with them. Nevertheless, Europeans and American companies are seeking green gases, and this GIS technology is thriving mainly in the Middle East and Africa. #GISsubstation #CompactDesign #EnvironmentalImpact #SF6Gas #GreenTechnology #EuropeanUnionRegulations #SustainableEnergy #MiddleEastMarket #AfricanMarket #ElectricPowerEngineering

CVT stand for Capacitive Voltage Transformers, CVT Primarily used for voltage measurement. It providing voltage signals to metering units, automatic control devices and protection relay devices. CVT widely used in transmission power system for applications high voltage and highers. CVT have wider frequency response. CVT can be used for coupling of power line carrier communication due to high frequency response. PT stand for Potential Transformer, It can be used in power systems for voltage transformation. PT can converts higher voltage values to lower voltage value for measurement and protection. Why CVT is used instead of using PT? CVT wider frequency response than PT. PT frequency response is narrower than CVT. PT also not suitable for PLCC coupling. PT reduces the voltage using stepdown transformer only but CVT reduces the voltage first than reduces voltage further using step down transformer. CVT & PT is same primary function it reducing high voltage to lower voltage for measurement but completely different from used in working principle and applications.

115kV Gas Insulated Substation’s(GIS) installed equipment overview. High Voltage Transmission Line comes from generating station to Subtation Station’s high voltage Bus. Inside the substation the first component for line is the High speed earth switch then Voltage Transformer & Current Transformer then through Circut Brekaer it reaches to the High voltage bus & on both side of the circuit Brekaer Disconnector & earth Switches are installed. When high voltage reaches to bus it is then transfers toward transformer & now it passes from circuit breaker with disconnector & Earth Switches on both side then from CT & VT & High speed earth switch toward the transformer High Voltage Side where it is step down & transfers toward the switches gear from the low voltage side of the transformer. From Switch Gear it is distributed either toward the distribution substation or industrial load depends on the voltage level & the requirement of distribution & transmission network.

LBS Load Break Switch. Spring mechanisms are generally provided with fuse protection. when fault occurs, the fuse needs to be replaced. Use to switch voltages from 1KV to 33 KV. It is a replacement for two pole structure. also provides the protection to the transformer. ACR Automatic Circuit Recloser. In electric power distribution ACR is a class of switchgear designed for use on overhead electricity distribution networks to detect and interrupt transient faults. OHL ELECTRICAL DISTRIBUTION ⛑️

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 into technical details, it’s a good idea to remind ourselves of important terms and definitions relating to MV switchgear. Let’s start this article with a few basic terms used later. After, the seven most common MV switching devices will be explained in detail, referring to ABB’s equipment as an example. https://lnkd.in/dBEti9S

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 into technical details, it’s a good idea to remind ourselves of important terms and definitions relating to MV switchgear. Let’s start this article with a few basic terms used later. After, the seven most common MV switching devices will be explained in detail, referring to ABB’s equipment as an example.