September 29, 2023


Switchgear plays a crucial role in interrupting or switching currents in both normal and abnormal operating situations. It is used to control and protect various electrical equipment, from lights to high-voltage systems. In this guide, we will explore the basics of switchgear, its types, and the features and benefits that make it an essential component in power systems.


Types of Switchgear


  • High Voltage (H.V.) Switchgear: This type of switchgear is designed to handle high-voltage systems, typically above 33kV. It is used in advanced power systems where heavy fault currents and potential damage need to be managed effectively.
  • Medium Voltage (MV) Switchgear: MV switchgear operates within the medium voltage range, providing protection and control for circuits with lower voltage ratings. It is commonly used in industrial applications and power distribution systems.
  • Low Voltage Switchgear: As the name suggests, low voltage switchgear is used in circuits with lower voltage ratings. It is typically found in residential, commercial, and small-scale industrial settings, providing control and protection for various electrical equipment.


Features and Benefits of Switchgear


Complete Reliability: Switchgear installations must be reliable to ensure the continuous interconnection of generator stations and capacity expansion. They are crucial for isolating faulty sections of the power system, ensuring uninterrupted power supply to the rest of the system.


Fast Operation: Switchgear should be able to operate quickly in the event of a fault. This rapid response helps prevent damage to transformers, generators, and other equipment caused by short-circuiting currents. Swift fault clearance also minimizes the risk of the fault spreading to other areas and causing a system shutdown.


Provision for Manual Controls: Reliable switchgear should have provisions for manual controls, allowing important operations to be performed even in the event of electrical control failures. This redundancy ensures that critical functions can still be carried out, enhancing system resilience.


This post was written by Justin Tidd, Director at For nearly half a century, Swartz Engineering has been at the forefront of industry safety. They are a family-owned company specializing in power distribution for the electrical industry. Our design ensures maximum flexibility for excellent reliability and a high return on investment. 

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