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The container the transformer core and windings are placed inside is the tank.
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What use of conservator tank in transformer?
To enable the oil in the transformer tank to expand and contract with temperature changes.
What is the function of spacer in electrical transformer?
Spacers insulate the transformer tank from the mechanical vibrations of core & the windings.this results in reduced noise emisions.
What is the use of shunt in power transformer?
In Power Transformer in higher rating to minimise the Stray losses (losses caused by leakage flux linking with structural part- tank - yoke plates) Tank shunts shunt the leakage flux and contains it within. shunts are made of CRNGO.
What is the purpose of breather in transformer?
To allow the transformer to "free breathe" and yet prevent any moisture from entering. The desiccant in the breather removes any moisture in the air before it enters the tank or conservator.
What is the technical difference between oil cooled transformer air cooled transformer?
The basic difference between the air cooled transformer and oil immersed transormer is: If the heat generated in the transformer winding is capable of being swapped by the sarrounding ambient air without causing any problem to the performance of the transformer then its normally reffered as Naturally Air Cooled transformer or simply air cooled transformer. However when the capacity of the transformer increases, the heat generated in the winding of the transformer is more and the ambient air normally is inadequate to cool the windings and maintain the performance of the transformer. Its because of this reason the transformer windings are submerged in an oil tank. It has been observed that the hydrogen ions present in oil help to maintain the temprature of the winding of the transformer and thus overall performance of transformer.
What use of conservator tank in transformer?
To enable the oil in the transformer tank to expand and contract with temperature changes.
What are the physical parts of transformer?
Physicially it has transformer tank, conservator, bucholz relay , windings, oil
Why silicon gel used in transformer?
A transformer is fitted with a 'breather' pipe, which allows the air within the transformer (or its conservator tank) to enter or leave, as the oil (coolant) level changes due to contraction or expansion. As the air inside the transformer tank (or conservator tank) must be kept dry, the breather pipe is fitted with a chamber containing silica gel crystals which dry any air drawn into the transformer.
What makes the step down transformer burst?
A major internal short circuit has been known to burst the tank of a transformer; but it can apply to any transformer -not just a 'step-down' type.
What is the function of spacer in electrical transformer?
Spacers insulate the transformer tank from the mechanical vibrations of core & the windings.this results in reduced noise emisions.
Why need to vacuum in transformer chamber before filling transformer oil and how long need to vacuum?
we need vacuum to remove moisture from tank
How many percent oil level should be in transformer tank?
generally there is level mark in the tank or the breather. Fill it accordingly
What is function of breather and explosion vent of 3 phase transformer?
breather to observed moisture from the tank and explosion vent will works when the moisture will get observed in the tank then it will explodes from the explosion vent by breaking diaphgramAnswerThe breather allows air to enter and leave the transformer's sealed tank as the transformer oil contracts or expands. The breather is fitted with a silicon-gel chamber to ensure that any air entering the tank is dry. A viewing portal allows the viewer to determine whether the silicon gel crystals are still active.The explosion vent is a large-diameter tube, usually located at the top of the transformer tank, sealed with a frangible plate or diaphragm. Should an explosion occur within the transformer due, for example, to a catastrophic short-circuit fault, then the blast of the explosion will be allowed to escape through the explosion vent, rather than causing the transformer's tank to explode.
What are the causes for decomposition of transformer oil and how is this detected?
A major cause of decomposition of transformer oil is minor arcing within the transformer. Decomposition results in gas which bubbles towards the top of the transformer and upward into the conservatory tank. Between the transformer and conservator tank is a Buchholz relay, in which this gas collects, causing a mercury switch inside a float to initiate an alarm in the substation. This gas can be collected through a small pipe feeding from the Buchholz relay in order to have it analysed.
How does conservator work in transformer?
To allow room for oil expansion and contraction. The transformer is completely filled with the oil and when it heats up under load or due to ambient temperatures, the oil has to have a place to go. In the event of colder weather or if the transformer is not under heavy load the oil cools and contracts creating a slight vacuum inside the tank. The conservator acts as a reservoir of oil that can then flow back into the tank so that no air enters it.
What is the Transformer Breather?
A transformer breather is an acessory of an oil filled type transformer which is attached into the oil conservator tank; this serves as the breathing point of the unit, that when the insulating oil of the transformer gets heated up, it expands and goes back to the conservator tank and subsequently pushes the dry air out of the conservator tank through the breather which is filled with silica gel, when the oil cools down, it retracts and sucks fresh air from the athmosphere through the breather and from this point, the silica gel dries up the air that goes back in to the conservator tank. for a better understanding have a look at the following pic: http://www.csanyigroup.com/wp-content/uploads/posts/transformer-oil-diagnostics/img-1.jpg
What is difference between dead tank and live tank type potential transformer?
Construction wise, in a live tank PT, both the primary & secondary windings will be placed on top tank. In a dead tank PT, primary & secondary windings will be placed in bottom tank.
