KWS-303WF AC Power Meter 85-290V/40A Voltage and Current Meter

The KWS-303WF 8-in-1 AC Power Meter is a multifunctional electrical measurement instrument designed for monitoring the main electrical parameters of AC loads. It combines several measurement functions into a single digital panel meter, allowing users to monitor voltage, current, power, energy consumption, power factor, frequency, and other electrical parameters in real time.

The meter supports an AC input voltage range of 85–290V and can measure load currents up to 40A, making it suitable for many single-phase electrical and electronic applications. Its digital display provides continuously updated measurements, allowing users to monitor the electrical behavior of connected equipment without requiring multiple separate meters.

One of the primary functions of the KWS-303WF is AC voltage measurement, which allows users to observe the supply voltage and identify abnormal voltage conditions. The meter also measures load current, providing information about the amount of current being drawn by the connected equipment.

The device can additionally display active power in watts, making it useful for evaluating the instantaneous electrical power consumed by a load. Its energy measurement function records accumulated electrical consumption, typically expressed in kWh, which can be useful for monitoring energy usage over a period of time.

The integrated power factor measurement provides additional information about how effectively an AC load is using the supplied electrical power. This can be particularly useful when testing inductive or switching loads where the relationship between voltage and current is not purely resistive.

The KWS-303WF also provides frequency measurement, allowing users to monitor the AC supply frequency. Depending on the specific version and configuration, the meter may provide additional monitoring or control functions; therefore, the exact functions should be verified against the supplied unit's documentation.

With its compact digital-panel format and broad voltage range, the KWS-303WF can be used for electrical panels, workshops, laboratories, AC load monitoring, equipment testing, and energy-consumption measurement.

Technical Note: The 40A rating refers to the maximum supported load current of the meter configuration. For loads approaching this value, wiring, terminals, enclosure ventilation, and installation method must be appropriately rated. Always follow the manufacturer's wiring diagram and safety specifications when working with mains voltage.

Features

• 8-in-1 multifunction AC power measurement

• AC voltage measurement

• AC current measurement up to 40A

• Active power measurement

• Accumulated energy measurement

• Power factor measurement

• AC frequency measurement

• Digital display for real-time monitoring

• Wide 85–290V AC voltage range

• Compact panel-meter design

• Suitable for electrical and energy monitoring applications

Specifications

• Model: KWS-303WF

• Product Type: Multifunction AC Power Meter

• Measurement Functions: 8-in-1

• AC Voltage Range: 85–290V

• Maximum Current: 40A

• Voltage Measurement: AC

• Current Measurement: AC

• Power Measurement: Active Power

• Energy Measurement: Accumulated Energy

• Power Factor: Yes

• Frequency Measurement: Yes

• Display: Digital

• Application: Single-Phase AC Electrical Monitoring

Applications

• AC power consumption monitoring

• Electrical panel monitoring

• Home energy monitoring

• Workshop equipment testing

• Laboratory electrical testing

• AC load monitoring

• Power supply monitoring

• Appliance energy measurement

• Industrial equipment monitoring

• Electrical troubleshooting and maintenance