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Where Tap changer placed in transformers primary side or secondary side?
Wiki User
∙ 13y ago
It's installed on the high-voltage side.
Wiki User
∙ 13y ago
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Why distribution and power transformer are rated in mva?
Transmission transformers are rated in mva. Distribution transformers are rated in kva. Power transformers are measured in va. There are, of course, exceptions, but this is the normal nomenclature.Answer (for UK terminology)In the electricity supply industry, the name 'power transformer' is used to describe those transformers used in the transmission system (400/275/132-kV levels), while 'distribution transformers' are those used in the distribution system (33 & 11-kV and 400-230-V levels). Power transformers and primary-distribution transformers are rated in megavolt amperes (MV.A), while secondary-distribution transformers are rated in kilovolt amperes(kV.A).Note that 'mva', 'kva', and 'va' are incorrect symbols for 'megavolt ampere', 'kilovolt ampere', and 'volt ampere'. The correct symbols are shown in the above paragraph (except that the period, or full stop, should be placed above the line).However, I suspect your question is really asking why are transformers rated in (mega) volt amperes rather than in (mega) watts? The answer is simply that the load that a transformer can supply is determined by the product of the transformer's rated secondary voltage and rated secondary current -the product of which (for alternating current) is the volt ampere, not the watt.
What is meant by torroidal transformer?
"Torroidal" means donut shaped; a torroidal transformer is one where the core forms a circle. Typically the transformer is placed around a conductor, which is considered the "primary winding" with 1 turn. The secondary winding is the copper wrapped around the circuilar core.
What core type and shell type?
A 'core type' transformer core is one in which the primary windings and secondary windings are placed around each of the limbs, as opposed to a 'shell type' core, in which the two windings are placed across the centre core. A core-type core is a magnetic circuit equivalent to an electric series circuit, whereas a shell-type core is equivalent to an electric parallel circuit.
What is a current transformer and how can a current transformer be used to extend the range of a wattmeter?
A current transformer (CT) works just like any other transformer. It is important to note it is not referenced to ground. It reflects current flow, not phase to ground voltage, so it attempts to hold current constant, not voltage. There is usually one primary "winding": one large cable through a donut CT, and multiple secondary windings. If a secondary winding is shorted (a wire placed across its terminals), the voltage built up in the secondary will be equivalent to V = I*Z, where I is the secondary current, and Z is the impedance of the secondary winding, usually specified as some flat value plus so many ohms per winding. If too big of an impedance is placed on the secondary, a voltage will build up to the point that the donut CT saturates, resulting in an output wave that has a large amount of harmonics. If the CT is open circuit\'d, voltage will build up until it is high enough to arc over (usually where it should have been shorted). CT\'s can be damaged by open circuiting them, so don\'t do it.
Why cooling oil is used in transformers?
The oil in a transformer has two functions: Oil is a better electrical insulator than air is, so high voltage parts can be placed closer together, saving space and materials. Also, oil is more efficient at cooling the transformer. The oil circulates inside the transformer, removing heat from the internal core and transferring it to the cooling radiators or the surface. In small transformers, this occurs naturally, by convective currents. In large transformers, there are thermostatically controlled pumps to assist this cooling cycle.
Major parts in a transformer?
All basic mutual transformers have a laminated silicon-steel core, around which are placed a primary winding and a secondary winding.Practical transformers can be much more complicated. They may contain multiple windings, terminal bushings, tap-changing mechanisms, oil-cooling arrangements, and protective devices.
How do I mark primary and secondary stress in English words?
Primary stress is where the word has its biggest concentration of sound. It is marked by an apostrophe placed at the beginning of the stressed syllable, and the apostrophe MUST be up-placed. Secondary stress is where the word has any sort of stress, yet it is not as relevant as the primary stress; the apostrophe is placed in the beginning of the stress syllable, but it MUST be down-placed. For example: in the word vaccination, it should be like this: [ˌvæk-sǝ-'nei-ʃǝn]. Where the "va" has the secondary stress, and the "na" has the primary stress.
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.
how does a car cd changer work?
A car CD changer works by being placed in a trunk and mechanically rotating the discs to be read.
What is pimary and secondary?
Primary and secondary can be placed in multiple things like sources, weapons, plans etc. In the case of sources; primary sources are sources of which have a direct link to whatever it is being investigated or read about. Secondary sources are non direct in which an example would be by word of mouth. Since news is passes through people that were not present for the event.
Why distribution and power transformer are rated in mva?
Transmission transformers are rated in mva. Distribution transformers are rated in kva. Power transformers are measured in va. There are, of course, exceptions, but this is the normal nomenclature.Answer (for UK terminology)In the electricity supply industry, the name 'power transformer' is used to describe those transformers used in the transmission system (400/275/132-kV levels), while 'distribution transformers' are those used in the distribution system (33 & 11-kV and 400-230-V levels). Power transformers and primary-distribution transformers are rated in megavolt amperes (MV.A), while secondary-distribution transformers are rated in kilovolt amperes(kV.A).Note that 'mva', 'kva', and 'va' are incorrect symbols for 'megavolt ampere', 'kilovolt ampere', and 'volt ampere'. The correct symbols are shown in the above paragraph (except that the period, or full stop, should be placed above the line).However, I suspect your question is really asking why are transformers rated in (mega) volt amperes rather than in (mega) watts? The answer is simply that the load that a transformer can supply is determined by the product of the transformer's rated secondary voltage and rated secondary current -the product of which (for alternating current) is the volt ampere, not the watt.
What is the primary and secondary and tertiary process for potato chips?
Primary - Dig It! The potatoes are dug from the ground - on a farm. Secondary - Make it! The potatoes have value added to them by being peeled, then sliced, fried and then flavour is added. They are then bagged ready for sale. Tertiary - Sell it! The Crisps (or chips) are placed on the shelves ready to sell.
Is a spider a primary consumer a secondary consumer or tertiary consumer?
tertiary consumer Depends on what is for dinner. Salad (vegan) - Primary Consumer Hamburger - Secondary Consumer Lion Steak - Tertiary Consumer Most human will fall in the Secondary Consumer category.
What is meant by torroidal transformer?
"Torroidal" means donut shaped; a torroidal transformer is one where the core forms a circle. Typically the transformer is placed around a conductor, which is considered the "primary winding" with 1 turn. The secondary winding is the copper wrapped around the circuilar core.
Where is the m40 on black ops for ds?
In the campaign, it's in the level SOG and you start out with it as your secondary or you can find it placed on several boxes through out the game. Multiplayer it in the Light Machine Gun section of the primary weapons.
What are two methods for a candidate to be placed on their party's primary ballot?
Two methods for a candidate to be placed on their party's primary ballot are self-announcement and petition.
What does a triangle placed in front of a code in the cpt manual mean?
secondary
