6491X 10.0mm Conduit Wiring Cable Green/Yellow 50m

50m. BASEC approved 6491X. BS 6004. PVC insulated. Rated 55A

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SWITCHYARD and GENERAL SIGNIFICANCE

Electrical energy organization system ensures supply of energy to each consumer at all times at rated voltage, frequency and specified waveform, at lowest cost and minimum environmental degradation. The switchgear, safety and network mechanization are integral parts of the modern energy management system and national economy.

The modern 3-ph, 50 Hz, AC interconnected system has several conventional and non-conventional power plants, EHV AC and HVDC Transmission system, Back to Back HVDC coupling stations, HV Transmission network, substations, MV and LV Distribution systems and connected electrical loads. The energy in electrical form is supplied to various consumers located in vast geographical area, instantly, automatically, and safely with required quality at all times. The service connection and high quality of power supply have become very important.

For fulfilling the foresaid purpose, a state of the art, systematically and technically higher SUBSTATION is required. Sub-Station is the load control center of the thermal plant where power at rated voltage, frequency and waveform is exported/imported as per requirements.

The substation at GHTP Lehra Mohabat has only one 220 KV switchyard. There are two output units each having a capacity of 210 MW. The generating voltage is limited to 15.75 KV and this voltage as stepped up by two-generator transformer 15.75/220 KV manufactured by BHEL. A part of 15.75 KV supply is fed to unit auxiliary transformer, which is stepped down to voltage 6.6 KV which is used to run the major auxiliaries of the plant.

After step up, the 220 KV output from the generator transformer is fed to either of the two bus bars through relays and circuit breakers and these are connected to various feeders through various equipments. DIFFERENT TYES OF EQUIPMENTS USED IN SUB-STATIONS

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