Electricity Substations: What They Are and How They Work

What are Substations?

Substations play a crucial role in the electrical power system. They are used to regulate and control the voltage of electricity, making it safe to transfer into homes and businesses. Substations can also transform voltage from low-to-high or vice versa, depending on the needs of the electrical system.

There are three main types of substations: transmission, sub-transmission, and distribution substations. The size of the substation depends on its usage, whether it caters to residential or industrial properties. However, some facilities such as schools and hospitals may require their own substation.

When it comes to businesses and organisations that require a substation, it is important to enlist the services of a company, like Business Electric, that understands all aspects of substations.

The following table summarizes the key features of the three main types of substations:

Type of Substation Voltage Range Purpose
Transmission 230 kV to 765 kV Transfers power over long distances
Sub-transmission 69 kV to 161 kV Distributes power to large areas
Distribution 4 kV to 34.5 kV Delivers power to homes and businesses

Substations are essential components of the electrical power system. They help regulate and control the voltage of electricity, making it safe to transfer into homes and businesses. Choosing the right type of substation for your needs and enlisting the services of an expert company will ensure a reliable and efficient electrical system.

Electrical Substation Design and Installation

Your supplier should provide you with the following comprehensive substation design services

  • Conducting thorough risk assessments and identifying appropriate actions to mitigate them.
  • Surveying and construction
  • Regular maintenance and complete refurbishment
  • Comprehensive testing for SF6 (Sulphur Hexafluoride)
  • In-depth substation grading and protection services
  • The production of in-depth technical reports
  • Design and installation of cable/overhead lines support structures, senior authorised persons (SAP), and safety standby.
  • A delivery program that considers local network constraints and any site limitations.

A good supplier should also be able to provide you with the following additional services:

  • Maintenance of low-voltage and high-voltage equipment
  • Substation upgrades
  • Transformer relocation
  • Assembly, and degasification
  • Thermal imaging surveys
  • Relay upgrades
  • Transformer oil testing
  • Comprehensive maintenance reports.

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