COS F МЕТЪР МЕПСИ 3P 400V

An analog panel Cos meter, also known as a power factor meter or power factor indicator, is an electrical instrument used to measure and display the power factor of an electrical circuit. Power factor is a dimensionless quantity that represents the ratio of real power in watts to apparent power in volt-amperes in an AC circuit. It is a crucial parameter for evaluating the efficiency of electrical systems and equipment.