Ammeter & Voltmeter Wiring | Electrical Panel Designing
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keynotes :
A voltmeter is an instrument used for measuring the electrical potential difference between two points in an electric circuit.
Voltmeter consists of Voltmeter selector switch, voltmeter and circuitbreaker.
An ammeter is a measuring device used to measure the electric current in a circuit.
Ammeter consists of an Ammeter selector switch, ammeter, and current transformer (c.t).
A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.
An ammeter measures the electric current in a circuit. The name is derived from the name for the SI unit for electric current, amperes (A).
In order for an ammeter to measure a device’s current, it must be connected in series to that device. This is necessary because objects in series experience the same current. They must not be connected to a voltage source — ammeters are designed to work under a minimal burden, (which refers to the voltage drop across the ammeter, typically a small fraction of a volt).