An active power meter is an electrical measuring instrument used to measure the active power output of a power supply or the active power consumed by an appliance, usually also measuring voltage.Current.Power factor and other electrical parameters.Active power is the average of the integration of instantaneous power in a cycle, so active power is also called average power.

Active power meter wiring

Active power meter features: direct rms measurement: voltage/current/power/power factor/frequency/electricity/reactive power, etc.Current.Voltage variation ratio can be set freely.There are three configurable alarm outputs, suitable for various power control.With configurable 4-20mA variable output.Power supply voltage AC90-260V50HZ/60HZ. with RS-485 communication port, MODBUSRTU protocol can be selected.Can be used in power system.Factory power distribution.Automatic control of distribution electricity projects such as building automation.Such as: three-phase.Voltage/current/power.Integrated display control or up to six-way voltage/current display control.

Active Power Meter Model

PL34 three-phase four-wire.Unbalanced overload.Dial 240° PQ34 three-phase four-wire.Unbalanced overload.Dial 90°.

Principle of active power meter

The active power meter ---- indicates with its pointer the instantaneous value of the active power currently consumed by the equipment.The active power meter ---- indicates with the dial the cumulative value of the active power consumed by the current equipment.Measure W (W = PT) active power meter is measured active power, it is different from the value of the total power derived from an AC voltmeter and an AC ammeter in parallel series on the load, it must be less than or equal to the value of the total power, the ratio is called the power factor, the total power measured with the V and A meters minus the active power measured with the active power meter is the value of the reactive power on the current line.For example, you put a few uF capacitor series in the 220V circuit (withstand voltage to more than 300V Oh) with the active power meter measured power value should be basically zero, while the total power measured with the V and A table can not be zero, because there is current flow and voltage, but because of its phase deviation capacitor does not consume power, so the active power is zero, the rest is all reactive power, so your home meter (active meter)should not turn.(If it is spinning slowly because the line resistance is losing power) Use active power to total power to get power factor.