MEWOI1500C(New) Upgraded Wireless H/Voltage Current Transformation Ratio Test Meter,phase meter

OEM/ODM Instruments Manufacturer

  • Main Features:: First and secondary loop current, turn ratio, phase angle , polarity, phase difference
  • Model No.:: MEWOI1500C
  • Name:: MEWOI1500C Wireless H/Voltage Current Transformation Ratio Test Meter

Contact Us for QuotationEmail:mewoi@mewoi.comWhatsapp: +8618620373879


Click to download: MEWOI1500C Color Page

MEWOI1500C(New)Wireless HV Transformation Ratio Tester special designed and manufactured for online measurement of current transducer, transformer primary current and secondary current, transformation ratio, phase and polarity judgment below 35kV in operation. The product is composed of primary current clamp (high voltage detector), secondary current clamp, host machine, high voltage insulation rod, monitoring software, communication cable, etc. the test data of primary current clamp adopt wireless to transmit which transmission distance of 100 meters.

The current clamp is made of high performance perm alloy with magnetic shielding technology, which is almost free from the influence of the external magnetic field, ensuring the long time uninterrupted monitoring of high accuracy, high stability and high reliability. The host LCD display clear, with large storage space, can store 3000 groups of data. the high voltage detector connect with 5pcs insulation rod, which can use for high voltage line current measurement of the wire with insulation skin below 60KV or bare wire below 35KV, high voltage current clamp have unique automatic plug and pull structure, by pressing or pulling out the insulation rod can be easy to clamp or withdraw the tested wire, saving time and more effective. It is widely used in substations, power plants, and industrial and mining enterprises, inspection stations, electrical maintenance departments for current detection and electrical field operations. The insulation rod is handiness, and has the characteristics of moisture-proof, high temperature resistance, impact resistance, bending resistance, high insulation, scalable and so on. Insulation level 110KV.

The monitoring software has the functions of online real-time monitoring and historical query, dynamic display, maximum, minimum and average indication, alarm value setting and alarm indication, and with historical data reading, accessing, saving, printing and other functions. MEWOI1500C (New) Wireless HV Transformation Ratio Tester, at the same time: High/Low voltage clamp current meter, high altitude current telemeter and other products functions.


FunctionMeasurement for H/L voltage current transducer andtransformer,support primary and secondary circuit current, turn ratio, polarity and phase adjustment functions
Power Supply DC 6VLR03(1.5V AAA×4)
Test Mode Clamp CT

Primary Current Test Accuracy

Range:0.0A~800A;Resolution:0.1; Accuracy :±0.5%FS(23℃±3℃, below 70% RH,the conductor should be in the center of  the clamp)

Secondary Current Test Accuracy


Transformation Ratio Measurement Range


Transformation Ratio Resolution 0.1
Primary HV Current Clamp Size

Jaw Size: φ48mm

Out Shape Size: 76mm×255mm×31mm

Secondary LV Current Clap Size

Jaw Size: φ8mm

Out Shape Size: 137mm×40mm×19.5mm

Shift Automatic shifting

Sampling Rate

2 times/second
Data Storage

3000 groups, Press the left arrow key to keep the data and store automatically (Power down or replace the battery will not lose data)

Data Hold Press left arrow key to hold data in test mode, “HOLD” symbol display, press HOLD key again to cancel hold function

Data Access

Press the right arrow key enter in o data access mode

Overflow Display

Exceed measure range overflow function: “OL” symbol display

No Signal Indication

When the receiver has not received transmit signal, dynamic display “no- -”symbol.

Auto Shut Down 15 minutes after boot up, the meter shuts down automatically without any operation

Battery Voltage

When battery voltage is lower than 5.2V±0.3V, low battery voltage symbol will display and remind to replace battery.

Primary Current Clamp Transmission Distance

Wireless transmission distance 100M

Secondary Current Clamp Connection Cable Length


Display Mode LCD:128dots×64dots  With  backlight function, suitable for dark places
LCD Size Display area :44mm×27mm
Host Size 78mm×165mm×42mm
Meter Weight 5 kg (with insulation rod and toolkit )
External Interference Avoid 315MHz, 433MHz Same-frequency Signal Interference
Working Temperature -10℃~40℃;below 70%rh
Store Temperature -10℃~60℃;below 70%rh
Insulation Rod Size Φ32mm,1m/pcs(5pcs)
Insulation Rod withstand voltage 110kv
Insulation Strength Host and detector:AC1000V/rms(between the shell and screws)


MEWOI1500C Application.jpg

Selection Guide

ModelMain FunctionsRange
Clamp sizeWireless transmission MaxTransformation ratiosData storageLine Voltage


MEWOI OEM/ODM  Instruments Manufacturer

Primary/Secondary Loop current,turn ratio,polarity and phase adjustment

High voltage clamp: 0.0A~800A

Low voltage clamp: 0.01mA~5A

High voltage clamp: φ48mm

Low voltage clamp: φ8mm



MEWOI OEM/ODM  Instruments Manufacturer

Primary/Secondary Loop current,turn ratio,phase angle,polarity and phase adjustment

High Voltage Primary:0.0A~800A

Flexible Clamp Primary:0.0A3000A

High voltage clamp: φ48mm

Flexible Clamp:φ200mm

Low voltage clamp: φ8mm




High and low voltage first and secondary loop current, variable ratio, polarity, phase difference, current leakage online test; current on both sides of transformer, variable ratio online monitoring  

Power supply

DC6V alkaline dry battery (1.5V AAA×4), continuous working for 30 hours

Test mode

Clamp CT

Transmission mode

Wireless transmission, the maximum distance of straight line transmission is about 30m

Display mode

LCD: 128dots×64dots; blue backlight function

LCD dimension

Display domain: 44mm×27mm

Meter dimension

Host: width, height, thickness75mm×170mm×30mm

High voltage clamp: width, height, thickness 76mm×255mm×31mm

Low voltage clamp: width, height, thickness 63mm×160mm×23mm

Clamp dimension

High voltage clamp: φ48mm

Low voltage clamp: φ30mm

Sampling rate

About 2 times/second

Measurement scope

High voltage clamp: 0.1mA~1000A

Low voltage clamp: 0.01mA~10A


High voltage clamp: 0.1mA

Low voltage clamp: 0.01mA


Automatic shift

One loop testing accuracy

23℃±3℃, below 80%RH

0.1mA~10.0A:       ±1%±3dgt

10.0A~49.9A:        ±1.5%±5dgt

50.0A~199.9A:      ±2%±5dgt

200A~600A:         ±3%±5dgt  

601A~1000A:        ±4%±5dgt  

Secondary loop testing accuracy

0.01mA~10A:       ±1%±3dgt (23℃±3℃, below 70%RH)

Variable ratio

3 variable ratio displays: (first and secondary loop real-time current measurement ; calculate the variable ratio at 5A of secondary loop and 10kV-YY of transformer 10kV/380V); the maximum transformation ratio is 1:10 million (1.0K7)    

Data storage

3000 sets, press key HOLD to maintain data and automatically numbered storage (data won’t lose in power off or battery replacement)

Line voltage

Below 60KV line test (with 5 insulation rods operation)

Data retention

Press key HOLD key to maintain data, shown by HOLD , and then press HOLD to cancel maintaining.

Data access

Enter data access mode by pressing key HOLD+ key POWER

Overflow display

Over-range overflow function: shown in “OL A

No signal indication

No signal” will be shown when the host fails to receive signal

Automatic shutdown

15 minutes after boot, meter automatically shuts down

Battery voltage

When battery voltage is lower than 4.8V, battery voltage is shown in low symbol to remind battery replacement

Meter mass

Host: 240 g (with battery)

High voltage clamp: 335g (with battery)

Low voltage clamp: 170g (optional)

the total mass of meter: 2.5kg (including insulation rod and battery)

External disturbance

No particularly strong electromagnetic field; without 433MHz and 315 MHz interference

Working temperature and humidity

-25℃~45℃; below 80%Rh

Storage temperature and humidity

-10℃~60℃; below 70%Rh

Insulation rod dimension

φ32mm, 1m/piece (5pieces,standard configuration)

Low voltage current clamp lead

Standard 2m

Insulation strength

High voltage clamp: AC100kV/rms (between the 5th insulation rod and high voltage current clamp core)

Host and low voltage clamp: AC1000V/rms


Anti-drip type Ⅱ (high voltage detector)


Clamp: 1 piece; receiver: 1 piece; current clamp: 1 piece; disc: 1 piece; RS232 communication wire: 1 piece; meter box: 1 piece; insulation rod (1m): 5 pieces; battery (alkaline battery AAA): 8 pieces

Clamp: 1 piece; receiver: 1 piece; current clamp: 1 piece; disc: 1 piece; RS232 communication wire: 1 piece; meter box: 1 piece; insulation rod (1m): 5 pieces; battery (alkaline battery AAA): 8 pieces

After Sales