What is current coil and pressure coil in wattmeter?
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A pressure coil is also known as the voltage coil and is generally used in a wattmeter. There is a prominent difference between current coil and pressure coil The current coil is always connected in series. While the pressure coil is connected in parallel with the load. Moreover, the current coil measures the current while the pressure coil measures the voltage. Both the coils are used in a wattmeter scale and to measure current or voltage in tension transmission lines.
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