Circuit Breaker, Current And Voltage Transformers, Disconnect And Ground Switches For GIS

Circuit Breaker: GIS uses essentially the same dead tank SF6 puffer circuit breakers used in AIS. Instead of SF6 -to-air as connections into the substation as a whole, the nozzles on the circuit breaker enclosure are directly connected to the adjacent GIS module. Current Transformers: CTs are inductive ring types installed either inside the GIS enclosure or outside the GIS enclosure. The GIS conductor is the single turn primary for the CT. CTs inside the enclosure must be shielded from Read More …

Construction and Service Life of GIS Substation

GIS is assembled of standard equipment modules (circuit breaker, current transformers, voltage transformers, disconnect and ground switches, interconnecting bus, surge arresters, and connections to the rest of the electric power system) to match the electrical one-line diagram of the substation. A cross-section view of a 242-kV GIS shows the construction and typical dimensions. Construction of GIS Substation: The modules are joined using bolted flanges with an “O” ring seal system for the enclosure and a sliding plug-in contact for the Read More …

GIS – Gas Insulated Substations

A gas-insulated substation (GIS) uses a superior dielectric gas, SF6, at moderate pressure for phase-to-phase and phase-to ground insulation. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in SF6 gas inside grounded metal enclosures. The atmospheric air insulation used in a conventional, air-insulated substation (AIS) requires meters of air insulation to do what SF6 can do in centimeters. GIS can therefore be smaller than AIS by up to a factor of 10. A GIS Read More …

Why We Use Stone in Outdoor Electrical Substation?

Ok, you don’t need to be an Electrical Engineer to ask yourself that, Why They Use Stone in Outdoor Electrical Substation? But if you are an Electrical Engineer then you may need to answer this type of question to anyone. I got one question like this from my top management that, Why We Will Use 2-2.5 inch size Stone and Why Not 0.5-1 inch Stone? In this post I will discuss “Why We Use Stone in Outdoor Electrical Substation?” Explanation Read More …

33KV Outdoor Electrical Substation Equipment’s

I was responsible for making a 33KV outdoor electrical substation for my factory. In this post I will discuss all electrical equipment that we practically used in our outdoor electrical substation. First of all our demand load form government grid line was 3MW and there was a guideline for making this substation like transformer must be install in outdoor, well grounding system and some other specification. Don’t worry I will give you a video link that you can see actually Read More …

Why Strong Magnetic and Electric Field Effect Come From Electrical Substation

I already posted several article about electrical substation. If this is first time for you then read my previous post and you will how to setup an indoor and outdoor electrical substation and many more. In this post I am going to discus about the magnetic and electric field effect in an electrical substation and where it comes. So let’s go. We all know that an electrical substation usually has powerful magnetic and electric field. This electric and magnetic field Read More …

Protection for a Power Transformer

Power Transformer is an essential electrical component. Engineer like me, who only depend on transformer then it’s really important to keep the transformer active for 24/7. If there is any problem with transformer then all machinery inside of the factory floor will be silent and zero production will come. When you are having problem with your transformer then it may take long time to repair it. So it’s better to protect power transformer at first place. In this post I Read More …

Transformer Installation, Inspection and Commissioning

I already posted couple of article about power transformer. In this post I will discuss about the indoor transformer installation, inspection and commissioning. Transformer Indoor Installation: There is some specification if you want to install a power transformer inside a room. But you can do it when you get the permeation from the government. In my country if we are making a substation and our supply voltage is 11 KV then we can install our transformer inside a room. But Read More …

Transformer Schedule and Overhaul Maintenance

In this post I will discuss about the schedule and overhaul maintenance for a power transformer. So you just need to follow this procedure for a power transformer. For batter and smooth operation, this two type of transformer maintenance should perform.  Schedule Preventive Maintenance For Power Transformer: First of all visual inspection. Inspect the transformer very carefully. You may detect some fittings problem on transformer body and eliminate the problem. Drainage of transformer sludge, etc,. Form the conservator. Adding the Read More …

Power Transformer Troubleshooting

If you are an electrical engineer then you will responsible for taking care of a power transformer in your work place. Like me, I am responsible for taking care of two power transformer. This is a new factory and I joined this company from very beginning. Every construction work done in front of me like making a substation, install all new machine even the civil construction work. Now my factory is running pretty well. We already provided the power to Read More …