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220 Kv G.S.S, Sawai Madhopur
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220 Kv G.S.S, Sawai Madhopur


.doc  220 KV GSS Sanganer.doc (Size: 849 KB / Downloads: 72)

INTRODUCTION

When India becomes independent its overall installed capacity was hardly 1900 mw. During first year plan (1951-1956) this capacity was only 2300 mw. The contribution of Rajasthan state was negligible during 1&2 year plans the emphases was on industrialization for that end it was considered to make the system of the country reliable. Therefore Rajasthan state electricity board came into existence in July 1957.
In India electrical power is generated at a voltage of 11KV to 33 KV . which is taken stepped up to the transmission level in the range of 66 KV to 400 KV
Member of transmission and switching have to be created. These are known as “SUB STATION”.
Along these transmission lines secondary substation are created where voltage is further stepped down to sub transmission and primary distribution voltage.
A substation is an assembly of apparatus, which transform the characte-ristics of electrical energy from one form to another say from one voltage level to another level. Hence a substation is an intermediate link between the generating station and consumer.
For economic transmission the voltage should be high so it is necessary to step up the generated voltage for transmission and step down transmitted voltage for distribution. For this purpose substations are installed. The normal voltages for transmission are 400kv, 220kv, 132kv and for distribution 33kv, 11kv etc.

THE YARD

The yard is spread in very long area. The yard of 220 KV GSS at Sawai madhopur has various equipment installed at the yard of 220 KV GSS, Sawai madhopur are:-
• Lighting Arrester
• Wave Trap
• Current Transformer
• Circuit Breaker
• Bus Bars
• Power Transformer
• Insulator
• Potential Transformer
• Static earthling system
• PLCC equipment including coupling capacitance
• Bushing
• Isolator

BUS BAR SYSTEM

This bus bar arrangement is very useful for working purpose as every GSS. It is a conductor to which a number of cut .Are connected in 220 KV GSS there are two bus running parallel to the each other, one is main and another is auxiliary bus is only for stand by, in case of failure of one we can keep the supply continues.
If more loads are coming at the GSS then we can disconnect any feeder through circuit breaker which is connected to the bus bar. This remaining all the feeders will be in running position .if we want to work with any human damage. In this case all the feeders will be on conditions.
According to bus voltage the material is used .Al is used because of the property & features and it is cheap.
With the help of bus bar arrangement we can connect all the incoming supply which is coming from different higher order GSS.

LIGHTENING ARRESTER

Lightening arrester is first equipment of GSS. It is protecting all the equipment against the HV. The ground wire or earthing does not provide protection against the high voltage waves reaching the terminal equipment .so some protective device is necessary to produce power station ,sub-station and transmission lines against the high voltage wave reaching here. Which is connected between line and earth it acts as a safty valve.
 

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