Ring Main Units Vs Switchgears: Which One is a Better Choice?

Comprehensive power networks in industries and commercial establishments need enclosures to give a streamlined structure to an otherwise complex web of connections. Enclosures facilitate seamless control, power regulation, and protection to all the connected equipment. Moreover, high-quality units detect and alleviate risks like equipment failure and fire from short-circuits without human intervention. In this article, we will be looking at Ring Main Units Vs Switchgears and understanding which one is better.

ring main units vs switchgears

For similar articles, click here.

Ring Main Units and Switchgears are two of the most widely used cabinets. They offer control. Additionally, they provide adequate protection from specific voltages at domestic and industrial levels. In this article, we try to give you a detailed view of Switchgear and Ring Main Units. This will help you choose the right option for your establishment.

See Also: 8 Best Self Monitored Home Security System of 2022

Ring Main Units (RMU): Explained

RMU is defined as a medium voltage, fully isolated, and gas-insulated cabinet that is leveraged to quantify, connect, and integrate protection functions of a transformer with a fixed type breaker. Medium or low voltage power distribution utilizes RMUs. These are a type of Switchgear. But unlike generic switchgear systems, these are compact, sealed, and enclosed. Therefore these are complete switchgear systems. A Ring Main Unit is an entire assembly of switching devices. Like traditional switchgear systems, these also consist of metering and protection devices. A typical RMU has one incoming feeder and multiple outgoing feeders. The incoming feeder is either an SF6 circuit breaker or a vacuum circuit-breaker with associated earth and disconnect switches. They are available for various voltage ranges and suitable for indoor and outdoor applications.

ring main units

Ring Main Units are reliable, safe, easy to replace and charge meagre maintenance costs. RMUs protect the whole electrical circuit from issues like ground-fault current, overloads, and short-circuits. It provides effective control of the entire electrical system through switches. It also helps isolate any faulty equipment from the rest of the circuit.

What are Switchgears?

Switchgear is an electrical apparatus. Switching, controlling, regulating, and protecting electrical circuits efficiently are all done by Swiitchgears efficiently. In an electrical network, Switchgear comprises electrical disconnect switches and fuses used to manage, protect and isolate the electrical devices connected to the network. They consist of various electrical devices like off-loading isolators, circuit breakers, contactors, and fuses. The most basic function of Switchgears is to protect the electrical appliances on the network.

They do so mainly by interrupting short-circuiting and overload fault currents while maintaining the service to unaffected circuits. Switchgears enhance the system’s availability. This is because they allow more than one source to feed a load. They are essential components in industries. This is because the environment is genuinely prone to electrical faults. Switchgear systems require regular maintenance and servicing to remain safe for usage and fully optimized to provide such high voltages.


The invention of Switchgears dates back to the origin of electricity generation itself. Typically, a Switchgear is located on both sides of large power transformers in substations. Today, oil-filled switchgear equipment has been hugely replaced by vacuum, air-blast, or SF6 equipment. Automated equipment controls these large current and power levels safely.

See Also: How to Remove Malware Protection Live from PC?

Ring Main Units Vs Switchgears: Comprehending the Differences

Ring Main Unit is a medium voltage and compact Switchgear that includes two or more isolating switches. These isolating switches work based on the load and consist of circuit breakers with proficient fault-sensing relays. Ring Main Units’ compact nature and working mechanism make it ideal for ring distribution systems. Additionally, in RMUs, the substation is still supplied from one end even upon the failure of the other end. This is because supply to the substation is from two different locations.

ring main units vs switchgears

Ring Main Units are an innovative development that has made it exceptionally easy for operators to scale the various power distribution challenges. As a reliable piece of equipment, Ring Main Units require very little maintenance and can easily withstand harsh environmental conditions. They offer a good amount of protection against phase-to-phase fault currents, ground contact currents, and magnetizing overload currents. RMUs can be seamlessly integrated with distribution management systems and facilitate an intelligent grid solution with innovative communication capabilities and electronic components.

Switchgears, on the other hand, is the generic term that is used to define a component in an electric power system that is used to control, isolate, and protect all connected equipment. Traditional switchgear systems are obsolete. They provide no digital compatibility and functionality, making them non-ideal for smart grid solutions. There is a crucial advantage to switchgear systems for outdoor and industrial applications. Engineers use a switchgear system to switch very high voltage circuits in and out. RMUs use low voltage substations, up to 11kV. This is, therefore, the complete answer of Ring Main Units Vs. Switchgears.

See Also: Top 6 Home Automation Ideas to Make Your Home Smarter

Conclusion: Improve Power Quality and Availability with Ring Main Units

In conclusion of Ring Main Units Vs Switchgears, Switchgears only have metering, incoming, and outgoing compartments. In contrast, RMU has a combination of various compartments that include the power incoming from a substation, metering compartment, and consumer outgoing. Even though a Ring Main Unit might be comparatively more expensive equipment than Switchgear, they can help your establishment to accelerate your grid digitization.

The advent of smart RMUs has revolutionized the modern grid in the new electric world. It is safe, simple to install, and has low-maintenance equipment that does all the work a generic switchgear system can do and more. This makes RMUs an all-in-one solution for an electrical system.

Thus, we can conclude that RMUs are the better choice among the two. Hence, we recommend you contact a renowned partner who can provide the right solution for your establishment. The best brands will support your establishment in bringing innovation to every level of your grid. It will enhance safety, reliability, efficiency, and overall connectivity.

See Also: Basic Electronic Components [Top 5] & Their Functions

Previous articleFixes To Windows 10 Narrator Won’t Turn Off
Next articleWhat Is IoT Device Management – And Its Fundamentals
He is a Tech Geek, Gadget Expert, SEO Expert, Web Designer, and a Blogger. Having a technology background and a deep understanding of challenges faced in marketing, gathered over a consistent period, gives him a unique perspective on what is needed.