KEWEISI KWS-AC300 Power Strip

The KEWEISI KWS-AC300 is a compact digital AC power monitor with an LCD that displays voltage, current, power, accumulated energy, power factor and operating time. It’s intended for line-level monitoring and can be installed in a panel, a custom enclosure or integrated into a power strip to give real‑time feedback on power usage for home or small commercial circuits.

The model family includes a version with an internal shunt for direct measurement up to 20 A and a variant that uses an external current transformer (CT) for measurements up to 100 A. The front button cycles through parameters and allows resetting logged energy and runtime. For the 100 A variant the CT must encircle only one conductor (L or N) — passing both will give incorrect (near-zero) current readings.

Specifications

• Voltage range: AC 50–300 V
• Current range: 0–20 A (internal shunt) or 0–100 A (with external CT)
• Power range: 0–4,400 W (20 A) or 0–30,000 W (100 A)
• Energy measurement: 0.01–19,999 kWh
• Operating frequency: 45–65 Hz
• Operating temperature: -10 °C … 99 °C
• Display functions: Voltage, current, power, energy (kWh), power factor, time (h), temperature
• Dimensions (approx.): 78.8 × 41 × 20.4 mm
• Memory: Retains settings and accumulated data after power loss
• Certification: CE