What is the 33 11kV substation equipment?
What is the 33 11kV substation equipment?
Power substation consists of: Switchgear: isolators, circuit breakers, earthing switches etc. Controlgear: current transformers, voltage transformers, contactors etc. Protection equipment: relays, fuses, surge arrestors etc.
Which type of fuse is used in 33 11kV substation?
MV-HV fuses suitable for 3.3kV, 11kV and up to 33/36kV transformer applications in accordance with IEC specification.
What is an injection substation?
An injection substation is a station where a higher voltage is stepped down to a lower voltage, especially for distribution in a densely populated area.
Why is the kV substation 33 11?
33kV to 11kV transformers steps down the the voltage to a safe level, which is then distributed via 11kV feeders to homes and businesses. Many people question why the voltage is as high as 33kV in the first place. The reason is that the higher the transmission voltage, the lower the transmission losses will be.
What is difference between AIS and GIS substation?
GIS high voltage substation engineering uses the gas sulfur hexafluoride for insulation, whereas AIS uses air insulation in a metal-clad system. Another significant construction-based difference between the two switchyards is that a metal-clad AIS uses three-position draw-out circuit breakers (on, off and test).
What is typically inside a substation?
Elements of a substation Substations generally have switching, protection and control equipment, and transformers. In a large substation, circuit breakers are used to interrupt any short circuits or overload currents that may occur on the network. High-rise buildings may have several indoor substations.
Why wave trap is used in substation?
Wave trap is used to create a high impedance to the carrier wave high-frequency communication entering into unwanted destinations typically substation. These high-frequency damages the power system components which are designed to operate 50 or 60 Hz. Wave traps are also called line traps.
What are the types of substation?
Types of Electrical Substations based on Applications
- Step up Substation.
- Step Down Substation.
- Primary Substation.
- Secondary Substation.
- Distribution Substation.
- Mobile Substation.
- Industrial Substation.
- Converter Substation.
What is the function of a substation?
The purpose of a substation is to ‘step down’ high voltage electricity from the transmission system to lower voltage electricity so it can be easily supplied to homes and businesses in the area through lower voltage distribution lines.
Why are gravels used on a substation floor?
When operating touch an electrical equipment during short curcuit condition,fault current flows through the human body. Stones increase resistance of soil, for this reason, step and touch potential limit decrease when people are working in substations/swicthyard it reduces the possibility of electric shock during work.
Which gas is used in GIS substation?
sulfur hexafluoride
GIS high voltage substation engineering uses the gas sulfur hexafluoride for insulation, whereas AIS uses air insulation in a metal-clad system. Sulfur hexafluoride is five times heavier than air and offers excellent extinction behavior.
Is it OK to live near a substation?
There is some concern that pylons and substations near homes (or businesses) can pose potential health problems for people nearby. However, EMFs emitted by pylons and substations can raise the risk of developing health problems when placed close to people and buildings.
What should the fault level be for a 33kV substation?
A 33/11kV indoor GIS substation with a 33kV fault level of 40kA is considered. The soil conditions considered are desert conditions and hence with poor resistivity. Soil resistivity measurement is done using Wenner 4 point method.
How is the 11 kV substation bus sectionalized?
The 11 kV bus was sectionalized into two sections each being fed from the different power transformers. A bus sectionalizer in form of a circuit breaker and disconnector was installed between the two bus sections which would make it possible to join or separate the two sections while in service.
Where can I find the DC substation design manual?
DC Design Complete EDMS Electronic Document Management System Substation Design Manual Page 2 of 120 Reference NI000401R121 Ver 2 Ergon Energy Corporation Limited ABN 50 087 646 062 Ergon Energy Queensland Pty Ltd ABN 11 121 177 802 EMF Electromagnetic Field
What do you need to know about power substations?
The substation would be a combination of switching, controlling, and voltage step-down equipment arranged to reduce sub-transmission voltage to primary distribution voltage for residential, commercial, and industrial loads. Power substation consists of: Switchgear: isolators, circuit breakers, earthing switches etc.