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MEWOI2520 Ring Main Unit Wireless Phase
MEWOI2520 Ring Main Unit Wireless Phase
MEWOI2520 Ring Main Unit Wireless Phase
MEWOI2520 Ring Main Unit Wireless Phase
MEWOI2520 Ring Main Unit Wireless Phase
MEWOI2520 Ring Main Unit Wireless Phase

MEWOI2520 Ring Main Unit Wireless Phase

2023-07-25 17:34:59  

MEWOI2520 Ring Main Unit Wireless Phase Detector

  • Main Features : 1.Model No.:MEWOI2520,2.Phase detecting voltage : AC 1V~600V3.Phase detecting distance : 30m,4.Phase detecting distance: 0°~360°5.Frequency Range : 45.0Hz~65.0Hz,6. Power Supply: Host: 3.7V, 2600mAh Rechargeable lithium battery;Detector: 3.7V,600mAh Rechargeable lithium battery
  • Serial No. :

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MEWOI2520 Ring Main Unit Wireless Phase Phase Tester is specially designed and manufactured for high voltage ring main unit phase verification. The instrument has a voice prompt function, and the operation is particularly simple, safe and fast. The instrument can check the phase in the extremely low voltage line, the check-phase voltage is 1V~600V, and the check-phase distance is 30 meters. The nuclear phase meter also has the functions of testing phase, frequency and phase sequence. The instrument is composed of host, detector, monitoring software, USB communication line, etc. The host adopts a 3.5-inch true color LCD screen, which can display phase, frequency, phase sequence and nuclear phase results on the same screen; vector diagram indication, phase indication, clear and intuitive; It has voice prompt functions such as "X signal is normal, Y signal is normal, in-phase, out-of-phase", which makes the test simpler and easier. The monitoring software has the functions of online real-time monitoring, historical data query, vector diagram indication, and phase indication; it has functions such as reading, viewing, saving, and printing historical data.

Main Features

1. Using wireless transmission technology, the nuclear phase distance is 30 meters, and the nuclear phase is accurate and convenient to operate.

2. Voice prompt: "X signal is normal, Y signal is normal, in-phase, out-of-phase".

3. The 3.5-inch LCD color screen can display the phase, frequency, phase sequence, and nuclear phase results on the same screen, and the dynamic vector diagram indication is clear and intuitive.

4. Data storage function, can store 200 sets of data. USB interface data upload function, the stored data can be uploaded to the computer, saved and printed.

Technical specification


Ring main unit nuclear phase and frequency, phase, phase sequence test

power supply

Host: 3.7V, 2600mAh rechargeable lithium battery

Detector: 3.7V, 600mAh rechargeable lithium battery

Nuclear phase voltage

AC 1V~600V

nuclear phase distance


Differential characterization

In-phase: -20°~20°; Out-of-phase: 100°~140° and 220°~260°


Test phase: 0°~360°

Test frequency: 45.0Hz~65.0Hz


Phase: ≤±8°

Frequency: ≤±2Hz


Phase: 1° Frequency: 0.1Hz

transmit frequency

433MHz, 315MHz

LCD size

3.5-inch color screen; display area: 71mm×53mm

Phase indication

Simultaneous display of vector graphics and numbers

Display rate

2 times/sec

data storage

200 groups (power failure will not lose data)

Automatic shut-down

After about 15 minutes of power on, the meter will automatically shut down

battery voltage

The host battery has a 4-grid power display. When there is only 1 grid or 0 grid, please charge it; when the indicator light of the detector flashes rapidly, it means that the battery voltage is low, please charge.

Rated current

Detector: 30mA max; Host: 150mA max

Instrument quality

Instrument: about 750g (including battery)

Instrument size

Host 195mm×100mm×45mm;

Detector 120mm×54mm×30mm

Insulation test

Host and detector: AC3700V/rms (between exposed metal and plastic casing)

outside interference

No strong electromagnetic field; no 433MHz, 315MHz co-channel interference

Working temperature and humidity

-10℃~40℃; below 80%rh

Storage temperature and humidity

-10℃~60℃; below 70%rh

Protection class


Suitable for safety regulations

GB13398-92, GB311.1-311.6-8, 3DL408-91 standards and the newly promulgated national power industry standard "General technical conditions for 1kV ~ 35kV portable nuclear phase detectors for live work DL/T 971-2017" requirements

Comply with IEC61481-A2; 2004; IEC 61243-1 ed.2:2003 standard

Selection Guide

Product NamePhase detection voltage
Phase detection distanceSatellite Phase Detection Distance


Wireless high voltage phase detectorAC 10V-500KV260m/
MEWOI2500ARemote wireless high voltage phase detectorAC 10V-500KV260m5000m
MEWOI2500BSatellite timing remote wireless high voltage phase detectorAC 10V-500KV260m50KM
MEWOI2520Ring Main Unit Wireless Phase detectorAC 1V-600KV30m/
MEWOI2540Metalclad withdraw switchgear wireless phase detectorAC 10KV-35KV20m

MEWOI2560AMultifunctional satellite remote wireless high voltage phase detectorAC 10V-500KV260m5000m
MEWOI2600Wireless high voltage  phase detectorAC 200V-2200KV60m

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