44 Advantage of vacuum CB * Used up to 66 KV. * Vacuum is highly dielectric, so arc can’t persists. * Separation of contacts causes the release of metal vapour. Source:Electric Substation Types The main purposes for establishment of a substation are: * Need for connecting a generator to the transmission system: We . Replacement of the existing 7 MVA (2 MVA & 5 MVA 66kV: kV transformers) switchyard with a new 66 kV switchyard consisting of two new 10 MVA DSC

Author: Molkree Faek
Country: Dominican Republic
Language: English (Spanish)
Genre: Art
Published (Last): 11 April 2012
Pages: 271
PDF File Size: 8.94 Mb
ePub File Size: 8.91 Mb
ISBN: 378-8-45710-330-3
Downloads: 35223
Price: Free* [*Free Regsitration Required]
Uploader: Nekinos

The output is a number of feeders. A grounding earthing system must be designed. Electrified railways also use substations, often distribution substations. Switching events may be planned or unplanned.

SWITCHYARD – ppt download

Speed – Ability to disconnect the faulty part at the earliest k.v.swirchyard time. To maintain reliability of supply, companies aim at keeping the system up and running while performing maintenance.

Selection of the location of a substation must consider many factors. They measure voltage and in conjunction with CTthey measure power. By using this site, you agree to the Terms of Use and Privacy Policy.

Published by Suzanna Stewart Modified over 3 years ago. These categories are not disjointed; for example, to solve a particular problem, a transmission substation may include significant distribution functions.

When a large fault current flows through the circuit breaker, this is detected through the use of current transformers.

  ISO 9409-1 PDF

Specification For Erection, Testing and Commissioning Of 66/11 kV Grid Substation | EEP

Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. In such cases, substation contains high-voltage switches that allow lines to be connected or isolated for fault clearance or maintenance. The microprocessor based Transformer monitoring relay. K.v.switchyadr switching station is a substation without transformers and operating only at a single voltage level.

It is a switching station which has the following credits: Categories Electric power distribution Electricity economics Power station technology Portals Energy Renewable energy Sustainable development.

High-rise buildings may have several indoor substations. These stations contain power electronic devices to change the frequency of current, or else convert from alternating to direct current or the reverse. Other devices such as capacitors and voltage regulators may also be located at a substation. If you wish k.v.switchyarr download it, please recommend it to your friends in any social system.

Collector substations also exist where multiple thermal or hydroelectric power plants of comparable output power are in proximity. Along with this, a substation always has control circuitry needed to command the various circuit breakers to open in case of the failure of some component. Facebook Linkedin Google Plus Twitter. To make this k.v.swigchyard work, we log user data and share it with processors.

These are sets of busbarsusually in multiples of three, since three-phase electrical power distribution is largely universal around the world.

Electrical substation

Environmental effects of the substation must be considered, such as drainagenoise and road traffic effects. The secondary of the aux PT is taken for measurement and protection. Today, standardized communication protocols such as DNP3IEC and Modbusto list a few, are used to allow multiple intelligent electronic devices to communicate with each other and supervisory control centers.


Discharge the voltage trap in line. In some cases a conversion of the current type takes place, commonly with rectifiers for direct current DC trains, or rotary converters for trains using alternating current AC at k.f.switchyard other than that of the public grid.

Substations generally have switching, protection and control equipment, and transformers. They feed synchronizing equipment. A transmission line or other component may need to be de-energized for maintenance or for new construction, for example, adding or k.v.switdhyard a transmission line or a transformer.

The input for a distribution substation is typically at least two transmission or sub-transmission lines. Transmission substations can range from simple to complex.

Wikipedia articles with NDL identifiers.

Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Indoor substations are usually found in urban areas to reduce the noise from the transformers, for reasons of appearance, or to protect switchgear from extreme climate or pollution conditions.