High voltage switch-yards and substations

switch yards & substations

How are Substations and High Voltage Switchyards Helpful?

Substations and Switchyards are significant components in the electrical generation, transmission, and distribution system. They deliver the transformation, switching, and protection of transmission and distribution systems.

What is “Switching Substation”?

A switching substation, also known as switchyard, is a substation without transformers that functions solitary at a single voltage level.

Switchyards are used largely for connections and interconnections and are important for transmission, distribution, and collection. Substations may be maintained and operated by an electrical utility or may be owned by a huge industrial or commercial customer. Normally, substations are unattended, depending on SCADA for remote supervision and control.

The purpose of the electric power delivery system is to transport electric power from generation sources to end users. Substations are the vital part of this electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. They also provide the transformation, ties, switching, and protection of the transmission and distribution systems.

Key Elements of a Substation

Switches – These are the devices that connect and disconnect the current path

Protection and Control Equipment – This is an equipment to control substation equipment, send power from one circuit to another, or open or shut down circuits when needed

Transformers – They are the devices that transfer electrical energy from one circuit to another, without changing the frequency. They use electromagnetic induction; which is used to change the line voltage.

Circuit Breakers – These are the devices used to complete, maintain and interrupt currents flowing in a circuit under normal or faulted conditions

Substations use huge transformers to convert a generator’s voltage up to tremendously high voltages for extensive distribution on the grid.

What are the Elements of a Substation?

Substations usually have switching, protection and control equipment, along with transformers. Circuit breakers are used to interrupt any short circuits or overload currents that may occur on the network in the huge substation. Whereas smaller distribution stations may use recloser circuit breakers or fuses for protection of distribution circuits. The power plant may have a substation nearby, but, substations alone themselves usually don’t have generators. The substation may also have other devices such as capacitors and voltage regulators.

Substations can be constructed on the surface in restricted enclosures, or under the ground, or can be located in specially designed buildings. Tall & huge buildings may have few indoor substations. Generally, urban areas mainly have indoor substations. The reason is transformers generate noise and switchgear needs protection from varying climate and pollution conditions.

A grounding (earthing) system necessitates designing. To prevent short-circuit in the transmission system, the total ground potential rise, and the gradients in potential during a fault (called touch and step potentials), needs to be calculated. A ground potential rise can be caused by earth faults at a substation. During a fault, in the Earth’s surface when current flows, it can cause metal objects to have a different voltage than the ground under a person’s feet; this touch potential presents a hazard of electrocution. The substation which has a metallic barrier should be suitably grounded to guard people from the hazard.

The main issues are reliability and cost. A good design tries to strike a balance between these two. It attempts to attain reliability without unnecessary cost. The design should also allow expansion of the station when required.

Apollo’s electrical contracting consists of team of specialized engineers to designs and builds high voltage projects across India. They are pioneers in electrical contracting services for switchyards and substations and high voltage transmission lines.

Contact Apollo for more information.


3 Key Elements to Check Before an Upgrad of Outlets & Switches


3 Key Elements to Check Before an Upgrade of Outlets & Switches


Every individual maintains a personal style for their home, keeping in mind safety, efficiency, and functionality. The look of the wall outlets & switches’ components can often make your home look either modern or outdated. Class 1 electrical contractors will always want to help you so that you have the best for your home. Here is a list of activities an electrical contractor will do to upgrade wall outlets & switches, electrical contracting plays a very important role for any building:

1. Outdated Outlets & Switches:

If the outlets & switches are a decade old or more, it’s high time to switch to new ones. It’s important to keep wall outlets & switches updated with the present technology. As this will fundamentally work better, in addition to looking stylish and sleek. A reputed electrical contracting team will always brief about it after analyzing the condition of outlets & switches.

2. Replacements:

In case of damage to wall outlets or switches, it has to be replaced. Especially if cracks are developed in the outer cases of the outlets or due to heat if the outlet has overheated it can cause serious hazards to the house and people staying. Calling an electrician immediately and asking for an upgrade and/or repairs, could save property and life of people staying there! Best electrical contractors will always suggest you on the maintenance, costing and how can you bring down the cost of this too.

3. Installation Issues:

Outlets that are painted over or improperly installed may look bad or not work as they should. An electrician will make sure your new outlets look fantastic and work as they should.

Apollo Power Systems is known for the best electrical contractor in Bangalore. As they would help in the functioning of your industries/offices/home run efficiently, save money, and look great.