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Today the highest voltages are 800 kV. These are commercially installed Transformers that are used for the transmission of power throughout the grid that they are connected to.

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Q: What is the biggest size of single phase transformer?
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What is the maximum capacity of 11kv transformer?

It depends on the design of the transformer but 1 MVA is a common size for an 11 kV / 415 v three-phase transformer.


Can you use 220 Volt 3 Phase as 208 Volt 3 Phase?

Yes by using a 3-phase transformer. The size depends on how much power has to be converted.


I need a 120V 208V 3 phase What size of 3 phase transformer do you need?

The sizing of transformers is based on an accumulation of all of the loads that will be connected to it. Add up all of your loads and possible loads in the future and then tell your installer the figures and they will use these to calculate the size of the transformer that is needed.


You have two devices that are rated at 230 VAC single ph and your supply voltage is 480 VAC 3 ph you need a 480 VAC 3 phase to 230 VAC three phase xfrmer how do you calculate the xfrmer size?

The transformer size is calculated by using the load current that is required on the secondary side of the transformer. This secondary current is multiplied by the secondary voltage times 1.73. This total is then divided by 1000 to give you KVA. KVA = I x E x 1.73/1000.


Why you use only single phase and three phase supply?

Single phase requires 2 wires - a hot, and a return (both wires of the same size. Three phase requires three (same size), and if it is grounded will require a forth (doesn't normally carry current so it can be small). Two phase requires three wires (two phase conductors of one size, and a return that can handle double the current of the phase conductors), or four wires (same size for all, effectively two separate single phase supplies). It isn't economical is the bottom line. It costs ~the same (in wire) for two phase as three, and you get 50% more power delivering capability with three phase.

Related questions

What is the maximum capacity of 11kv transformer?

It depends on the design of the transformer but 1 MVA is a common size for an 11 kV / 415 v three-phase transformer.


What size wire 100 kva transformer?

Wire sizing of a feed conductor is based on the amperage that a device draws. To calculate amperage from KVA a voltage of the supply has to be stated. Without this voltage and whether the transformer is single or three phase an answer can not be given.


Can you use 220 Volt 3 Phase as 208 Volt 3 Phase?

Yes by using a 3-phase transformer. The size depends on how much power has to be converted.


I need a 120V 208V 3 phase What size of 3 phase transformer do you need?

The sizing of transformers is based on an accumulation of all of the loads that will be connected to it. Add up all of your loads and possible loads in the future and then tell your installer the figures and they will use these to calculate the size of the transformer that is needed.


What size of cable wire used for 500 kva transformer 240 volt 3 phase?

A 10 mm cable is most commonly used for a 500 KVA transformer, 240 volt, 3 phrase. The size of the wire that is used in a transformer is based on the voltage.


Can you use a 30 amp disconnect switch for a 30 kva transformer?

im have a 30 kva transformer 3 phase 480v 80 amp panel 120v what size disconnect should I use


You have two devices that are rated at 230 VAC single ph and your supply voltage is 480 VAC 3 ph you need a 480 VAC 3 phase to 230 VAC three phase xfrmer how do you calculate the xfrmer size?

The transformer size is calculated by using the load current that is required on the secondary side of the transformer. This secondary current is multiplied by the secondary voltage times 1.73. This total is then divided by 1000 to give you KVA. KVA = I x E x 1.73/1000.


Why you use only single phase and three phase supply?

Single phase requires 2 wires - a hot, and a return (both wires of the same size. Three phase requires three (same size), and if it is grounded will require a forth (doesn't normally carry current so it can be small). Two phase requires three wires (two phase conductors of one size, and a return that can handle double the current of the phase conductors), or four wires (same size for all, effectively two separate single phase supplies). It isn't economical is the bottom line. It costs ~the same (in wire) for two phase as three, and you get 50% more power delivering capability with three phase.


Can transformer develop three phase power from a single phase source?

To do this, you will need to phase shift the single phase power supply into three distinct phases that are 120 degrees out of sync with each other. Phase shifting transformers can be used for this, but there might be other ways as well.


Transformer 208 volt primary and 480 volt secondary three phase 75 kva what size fuses on primar and secondary?

200 and 100


Can you replace a three phase motor 3 Hp RPM 1420 with a single phase motor for a planer?

Probably not. The single phase three horse power motor will be much larger in physical size than its three phase counterpart, and will probably not fit.


How do you hook up 3 phase to a 10 hp compressor?

First you have to have three phase power coming in. 3 phase are three hot wires working together on a syne wave. If you have 3 phase coming in, hook the three hot wires into the compresser, if it runs backwards, trade places with two of the wire and let the third one alone and you should be running.