A transformer used to step up or down the value of voltage.
Instrument Transformer
The same transformer can be both. It must be operated at the correct voltage on both windings.
Transformer capacity (kvA) shall be identical, Both transformer impedance, secondary voltage and frequency shall be identical.
The difference between current transformer and potential transformer is that the secondary of a current transformer can not be open circuited while under service whereas that of the potential transformer an be open circuited without any damage to the transformer.
Both are same. This is an instrument transformer used for metering & protections.
three phases
No transformers only work with AC.
Both Current and Potential Transformers are used for relays according to the working of relay.
Those are special type transformer used for both step down and step up in a single transformer ,they are specially designed . their wire thickness in both winding is thicker than ordinary step up or down transformer.and they are costly too.
A transformer used to step up or down the value of voltage.
Instrument Transformer
Ottó Bláthy, Miksa Déri, Károly Zipernowsky of the Austro-Hungarian Empire First designed and used the transformer in both experimental, and commercial systems in 1885.
The same transformer can be both. It must be operated at the correct voltage on both windings.
Injecting power into the higher voltage winding of a transformer will make it act as a step down transformer; injecting power into the lower voltage winding will make it act as a step up transformer. A transformer can be used both ways.
simple step up transformer
An oil filled transformer is usually used outdoors and a dry core transformer is usually used indoors.