Three-phase clamp-on phase voltmeter
A portable, high-precision three-phase clamp tester built for on-site power inspection.
It supports true RMS measurement, automatic wiring diagnosis, and CT ratio test in one device.
Safe for live working, lightweight and efficient, ideal for metering, maintenance and relay protection.
Product Introduction
MOEORW-W6800 is a portable handheld three-phase electrical tester for on-site measurement of voltage, current, phase, power, phase sequence, frequency, and harmonics. It can display vector diagrams, automatically check wiring correctness, and test CT transformation ratio. It is powered by a built-in lithium battery and uses clamp-type current measurement for safe, live-line testing. It is widely used in power inspection, metering verification, relay protection, and transformer testing.
Product Parameter (specification)
- Measures AC voltage from 30V to 450V (low-voltage distribution boxes, transformers, power cabinets)
- Current ranges: 10A / 50A / 500A / 1500A (small load to large current equipment)
- Phase angle accurate to 0.1° (critical for correct energy meter wiring)
- Can measure harmonics up to the 56th order
- Stores more than 30,000 records (equivalent to a built-in USB drive)
- Small size: 185×95×40mm, weight only 0.5kg (easy to climb poles and carry)
Key Benefits & Pain Points Solved
✅ No need to power off when measuring current → avoid production shutdown
✅ True RMS measurement → accurate even with distorted waveform (inverters, rectifiers)
✅ Automatically judges 96 three-phase four-wire / 48 three-phase three-wire wiring errors → no more wrong wiring judgment
✅ Measures CT ratio, ratio error, angle error → one device completes all CT tests
✅ Lightweight and handheld → suitable for high cabinets, narrow spaces, and long-time working
✅ One-click save vector diagram and data → no manual recording errors
Typical Application Scenes
- Power supply station on-site meter inspection and wiring check
- Transformer no-load / light-load test
- Secondary circuit and differential protection phase verification
- Energy meter wiring correctness judgment
- Phase sequence and phase angle calibration on site
- Harmonic distortion detection of non-linear loads
After-Sales & Qualification
1-year free warranty, lifetime maintenance
Independent R&D, in line with national power industry standards
Professional technical support
Hotline: +86 18607183135
Q: Can the clamp be used interchangeably with other instruments?
No, each clamp is calibrated with the host one-to-one, and interchange will affect accuracy.
Q: What should I do if it prompts "disk not formatted" when saving data?
Connect to the computer via USB and format the built-in storage, then it can be saved normally.
Q: How to check power quality?
A: Connect voltage leads and current clamps correctly → Turn on the instrument → Use harmonic test, phase test, wiring check, and waveform display functions → Read harmonic content, phase angle, distortion, and vector diagram → Judge whether power quality is normal.
Q: Will moving the clamp during measurement affect the result?
Yes, it will bring errors and even cause electric shock risk, please fix the position after clamping.
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