Switchgear and protection panel specialist expertise.

Switchgear is essential for protecting electrical infrastructure in any system

Installation of high voltage switchgear is a highly specialised activity. Powersystems have the specialist expertise to install switchgear from 415 V to 132 kV. Powersystems have installed and commissioned every type of switchgear including oil, air, SF6 and vacuum circuit breakers.

Powersystems offers a full electrical infrastructure project solution from design concept through to final installation and commissioning. From standard contracts through to complex turnkey projects, this includes maintenance, installation, testing and commissioning services for all HV/LV distribution equipment, including switchgear as well as protection and control systems.

Powersystems provide electrical infrastructure products and services to the renewables, generation, nuclear, commercial industrial, and grid stability sectors.

Powersystems switchgear and protection panel service

What is switchgear?

Switchgear is an integral part of an electric power system. Switchgear refers to collection of the switching devices that are used for controlling, protecting, and switching the electrical circuits and equipment.

The main product types of switchgear are high voltage, medium voltage and low voltage.

The products are installed indoor and outdoor as gas-insulated switchgear (GIS), air-insulated switchgear (AIS) and others.

Switchgear is used in residential, commercial, and industrial installation projects. Switchgear is composed of fuses, switches, relays, isolators, circuit breaker, voltage and current transformer, surge arresters, that protects electrical hardware from fault conditions.

Electrical switchgear is connected to electric supply systems and is used in both low and high voltage power transformers. Switchgear is used both to isolate equipment to allow work to be done for maintenance, repair and to protect from faults (an abnormal electric current).

This type of equipment is directly linked to the reliability of the electricity supply, every time there is a defect in the electric power system, like a short circuit, a massive current flow through the electric setup, which is damaging to the structure and causes supply disruption to the users. It is crucial to ensure optimum electrical protection.

Why is electrical protection and control important?

All electrical equipment and circuits need to be protected from damages due to voltage fluctuations and abnormal currents.

Electrical protection devices like surge arresters, surge protectors, fuses, relays, circuit breakers, reclosers, and other devices, ensure that currents do not exceed the current limit of your equipment.

Electrical protection and control devices make electrical installations more reliable and always under control. This is imperative to protect us all and the environments that we live and work in from short circuits, unintentional electrical accidents, and fires.

How does switchgear work?

Automated protective switchgear consists of a relay and circuit breaker. The relay above other things supervises the circuit and acts whenever there is a fault. The protection relay isolates the faulty circuit and disconnects the disrupted line. This ensures that the appliances do not get damaged and there is an uninterrupted supply of power. Relays ensure that the faulty part remains isolated while the healthy part continues to function as usual.

What are the different types of switchgear?

There are different types of switchgear, differentiated on their voltage levels. The three categories are:

History of switchgear

Switchgear is as old as electricity generation.  The earliest central power stations used simple open knife switches, mounted on insulating panels of marble or asbestos. Power levels and voltages rapidly escalated, making opening manually operated switches too dangerous for anything other than isolation of a de-energized circuit.

Oil-filled switchgear equipment allows arc energy to be contained and safely controlled. By the early 20th century, a switchgear line-up would be a metal-enclosed structure with electrically operated switching elements using oil circuit breakers.

Today, oil-filled equipment has largely been replaced by air-blast, vacuum, or sulphur hexafluoride (SF6 equipment), allowing large currents and power levels to be safely controlled by automatic equipment.

High-voltage (HV) switchgear connecting, or disconnecting part of a high-voltage electrical system is essential for the safe protection and operation without interruption of a HV power system and is important because it is linked to the quality of the electricity supply. HV switchgear was invented at the end of the 19th century for operating motors and other electric machines. The technology has been improved over time and can now be used with voltages up to 11 kV.

Typically, switchgear in substations is located on both the high and low voltage sides of large power transformers. The switchgear on the low-voltage side of the transformers may be located in a building, with medium-voltage circuit breakers for distribution circuits, along with metering, control, and protection equipment.

For commercial and industrial applications, a transformer and switchgear may be combined in one housing, called a packaged substation. Growing investment in the renewable energy market and the enhanced demand for safe and secure electrical systems are expected to generate the increase for switchgear

Future of switchgear and protection systems

The global switchgear market is expected to reach $128.01 billion in 2026. The demand for electricity generation is projected to drive the switchgear market.

Get started, planning your project with Powersystems

Speak with one of our high voltage electrical engineering specialists today.

Grid Connections

Whether an industrial, commercial premises or generation scheme Powersystems are able to provide a competitive grid connection offer. Our team of engineers and support staff manage the entire connection process from initial application, design, construction and commissioning through to final energisation and adoption.


Powersystems provide a full range of substation services.  From complete turnkey, bespoke engineered solutions to routine asset replacement or maintenance services from LV all the way through to 132 kV.


Powersystems have experience of specifying and installing every type of power transformer with primary voltages up to 132 kV we will also design and install full transformer control and protection of all types of transformers.

Cable Installation

Using our specialist in-house cable installation teams Powersystems are able to offer the complete range of cabling solutions from control and auxiliary cables, low voltage power and high voltage power cabling.

Testing and Commissioning

The testing and commissioning of high voltage electrical equipment is a highly specialised activity with each and every installation being tested by a trained engineer to exacting standards.

Project Management

46 years hard earned knowledge in the design and installation of high voltage electrical infrastructure ensures that your project starts on an accurate and realistic foundation – the prerequisite for successful project management.

Design and Build

With extensive industry knowledge, our design team are able to propose and develop power engineering solutions to meet any challenge.


Powersystems are able to ensure that the equipment required for your project will be designed and procured systematically and consistently applied assurance criteria to each part of the procurement process, with the correct specification, delivered within the constraints of the contract and competitively priced.