Instrument Transformer are used in A.C. system for measurement of electrical quantities like voltage , current, power, energy, P.F. frequency. Instrument transformers are also used with protective relays in power protection of power system.
Basic function of instrumental transformer is to step down the A.C system voltage & current . The voltage & current level of power system is very high. It is very difficult & costly to design the measuring instruments for measurement of such high level voltage & current. Generally measuring instruments are designed foe 5A & 110 volt.
There are two types of Instrument Transformer
1. Current Transformer (C.T.)
2. Potential Transformer (P.T.)
Basic function of instrumental transformer is to step down the A.C system voltage & current . The voltage & current level of power system is very high. It is very difficult & costly to design the measuring instruments for measurement of such high level voltage & current. Generally measuring instruments are designed foe 5A & 110 volt.
There are two types of Instrument Transformer
1. Current Transformer (C.T.)