Kunshi na Shunt Reactor

An amfani da Shunt Reactor don in tabbatar da kapasitivin karamin kuliya na karamin kuliya mai tsawo. An samun shaida da ke cikin shunt reactor yana iya kasancewa daga masu sana'ar zuwa masu sana'ar, amma babban shaida da ke cikin shunt reactor ana iya zama daidai.

Shaida na Shunt Reactor

An amfani da Gapped Core a shunt reactor. An gina shaida na Cold Rolled Grain Oriented Silicon Steel sheet don in haifi hanyoyin hysteresis. An laminate shekarun da suka haifi eddy current losses. An bayar da gaps a kan gine shaida ta hanyar baka spacers da sauran modulus of electricity a kan packets na laminations. Amsa, an yi gaps a kan radially. An ba laminations a kan packets a kan longitudinal direction. Amsa, an amfani da 5 limb 3 phase structure na shaida. Wannan ya fi shell type construction. An ba yokes da side limbs baki daya, amma an yi gaps a kan three inner limbs na individual phase kamar yadda aka nuna.

Winding na Shunt Reactor

Babu wani abu mai ma'ana a kan winding na reactor. Wannan ya fi copper conductors. An paper insulate conductors. An bayar da insulated spacers a kan turns don in ba da path for oil circulation. Wannan takarda tana taimaka don cooling da kyau na winding.

Cooling System na Reactor

Amsa, an amfani da ONAN (Oil Natural Air Natural) cooling don shunt reactor saboda ita da current mai yawa. An kofara radiator bank da main tank don in ba da cooling da kyau.

Tank na Reactor

Main tank na reactor da rated mai yawa UHV da EHV amsa ya fi bell tank type. Hakan, an gina bottom tank da bell tank da steel sheet da inganci. An weld shekarun da suka inganci don in gina both tanks. An gina tanks don in ba da full vacuum da positive pressure of one atmosphere. Tanks suna da design da take da shiga da yanayin jirgin sama da railways.

Conservator na Reactor

An ba conservator a kan top na tank da main tank to conservator connecting pipe line da diameter mai yawa. Conservator amsa ya fi horizontally aligned cylindrical tank, don in ba da space mai yawa na oil don expansion saboda temperature rise. An bayar da flexible separator a kan air da oil ko air cell a kan conservator. An ba conservator tank da magnetic oil gauge don in monitor oil level a kan reactor. Magnetic oil gauge tana ba alarm ta hanyar normally open (NO) DC contact, attached to it idan oil level falls below a preset level saboda oil leakage ko wani abu.

Pressure Relief Device

Idan akwai fault mai yawa a kan reactor, za a iya zama sudden and excessive expansion of oil inside the tank. Oil pressure mai yawa wannan tana bukata a kan reactor tana bukata a kan tank. Pressure Relief Device tana yi aiki. Wannan ya fi spring loaded mechanical device. An fitto a kan roof na main tank. Idan an actuate, upward pressure of the oil in tank becomes greater than the downward spring pressure, as a result there will be an opening in the valve disc of the device through which the expanded oil comes out to relief the pressure formed inside the tank. An ba mechanical lever attached to the device which is normally in horizontal position. Idan an actuate, this lever becomes vertical. By observing the alignment of the lever even from ground level one can predict whether the Pressure Relief Device (PRD) has been operated or not. The PRD is accompanied with a trip contact to trip the shunt reactor at the event of actuation of the device.
N B: – PRD or such type of device cannot be reset from remote once it actuated. It can only be reset manually by moving the lever to its original horizontal position.

Buchholz Relay

An fitto Buchholz relay across the pipe connecting the conservator tank and main tank. This device collects gases generated in the oil and actuates the alarm contact attached to it. It has also a trip contact which is actuated at the event of sudden accumulation of gas in the device or rapid flow of oil (oil surge) through the device.

Silica Gel Breather

Idan oil zama hot, ita ce expansion, thus air from conservator or air shell (where air shell is used) comes out. But during contraction oil, air from the atmosphere enters into conservator or air shell (where air shell is used). This process is called breathing of the oil immersed equipment (like transformer or reactor). During breathing, obviously moisture can enter into the equipment if it is not taken care of. An pipe from conservator tank or air shell is fitted with a container filled with silica gel crystal. When air is passed through it, the moisture is absorbed by the silica gel.

Winding Temperature Indicator

Winding temperature indicator is a kind of indicating meter associated with a relay. This consists of a sensor bulb placed in an oil filled pocket on the roof of reactor tank. There are two capillary tubes between sensor bulb and the instrument housing. One capillary tube is connected to the measuring bellow of the instrument. Other capillary tube connected to the compensating bellow fitted in the instrument. The measuring system, i.e. sensor bulb, both capillary tubes and both bellows are filled with a liquid which changes its volume when temperature changes. The pocket in which the sensor bulb is immersed, is surrounded by a heating coil which is fed by a current proportional to the current flowing through the winding of reactor. Gravity operated NO contacts are attached to the pointer system of the instrument to provider high temperature alarm and trip respectively.

Oil Temperature Indicator

Oil temperature indicator consists of a sensor bulb placed in an oil filled pocket on the roof of reactor tank. There are two capillary tubes between sensor bulb and the instrument housing. One capillary tube is connected to the measuring bellow of the instrument. Other capillary tube connected to the compensating bellow fitted in the instrument. The measuring system, i.e. sensor bulb, both capillary tubes and both bellows are filled with a liquid which changes its volume when temperature changes. The pocket in which the sensor bulb is immersed, is fitted at the location of hottest oil.

Bushing

The winding terminals of each phase comes out from the reactor boy through an insulated bushing arrangement. In high voltage shunt reactor, the bushings are oil filled. The oil is sealed inside the bushing that means there is no link between the oil inside the bushing and oil inside the main tank. Oil level gauge is provided on the expansion chamber of the condenser bushings.

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