The full meaning of MCB is Miniature Circuit Breaker. MCB is an electromagnetic switch or device. If for any reason a short circuit occurs in the supply line or load line (line to line or line to neutral) or in case of overload, the MCB automatically trips and disconnects the main line circuit or household power Connection. TP MCB In Three Pole MCB, Switching & Protection is affected in only Three-Phases and the Neutral is not part of the MCB. 3 pole MCB signifies the Connection of Three Wires for a Three-Phase system R-Y-B Phase. Three-Phase Supply Only Without Neutral.

Ammeter, an instrument, with the help of which the flow of electricity can be measured directly in electrical units, amperes. It is a galvanometer with very low resistance. As a result, the entire current flows through the meter coil. Current is measured with an ammeter. So it can be said that the device which measures the flow of current in an ampere unit is an ammeter. Electric current is the flow of electrons whose unit is an ammeter. So it can be said that the device which measures the flow of current in an ampere unit is an ammeter. An ideal ammeter has no internal resistance. But in reality, the ammeter has little internal resistance. The range of the ammeter depends on this resistance.

A current transformer is a device used to measure alternating currents. The transformer used with the ammeter for high-quality AC current measurement is called a current transformer abbreviated as CT. Current transformers are mainly used to measure high currents. We know that high power lines carry a lot of currents. In this case, an ordinary ammeter or multimeter cannot measure this current. Current transformers are used in Acorn.