MEWOI1550C Wireless High/Low Voltage CT/(Transformer) ratio tester/phase angle tester

OEM/ODM Testing Instruments manufacturer

  • Main Features:: Support First and secondary loop current, turn ratio, phase angle , polarity, phase detection
  • Model No.:: MEWOI1550C
Contact Us for QuotationEmail:mewoi@mewoi.comWhatsapp: +8618620373879

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MEWOI1550C Wireless High/Low Voltage CT/(Transformer) ratio tester/phase angle tester


MEWOI1550C Wireless H/L Voltage Transformation Ratio Tester special designed and manufactured for online measurement of current transducer, transformer primary current and secondary current, transformation ratio, phase angle,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. MEWOI1550C Wireless H/L Voltage Transformation Ratio Tester, at the same time: H/L voltage clamp current meter, high altitude current telemeter and other products functions.



H/L   voltage current transducer, transformer primary and   secondary circuit current, transformation ratio, polarity angle difference,   phase difference adjustment

Power   Supply

DC6V   alkaline batteries (1.5V AAA × 4)

Test   Mode

Clamp   CT

Primary   HV Current Clamp Test Accuracy

Range:0.0A800AResolution0.1A; Accuracy±0.5%FS (23±3below 70% RHthe detected is in   the center position of the clamp);

Primary   Flexible Current Clamp Test Accuracy

Range:0.0A3000AResolution0.1A; Accuracy±1.0%FS

Secondary   Current  Test Accuracy


Transformation   Ratio Measurement Range


Transformation   Ratio Resolution


Angle   Error Test  Accuracy



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   HOLD key to hold data,  press “HOLD” key once again cancel the hold   function

Data   Access

Press   HOLD key+ POWER 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

Automatic   Shutdown

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.

Display   Mode

LCD128dots×64dots with backlight   function, suitable for dark places

LCD   Size


Host   Size


Primary   HV Current Clamp Size

Jaw   Size: φ48mm;  Out Shape Size: 76mm×255mm×31mm

Primary   Flexible Current Clamp Size

Jaw   Size: φ200mm; Out Shape Size: 200mm×245mm×13mm

Secondary   LV Current Clamp Size

Jaw   Size: φ8mm;  Out Shape Size: 137mm×40mm×19.5mm

Primary   Current Clamp Transmission Distance

Wireless   transmission distance 100m

Current   Clamp Connection Cable Length


Meter   Weight

5kg   (include insulation rod and battery)

External   Interference

Should   avoid extremely strong electromagnetic fields, avoid 315MHz, 433MHz   same-frequency signal interference

Working   Temperature

-2545below 80%rh

Store   Temperature

-1060below 70%rh

Insulation   Rod Dimension

Ф32mm, 1m/pcs×5pcs

Insulation   Rod Withstand Voltage


Insulation   Streigth

Host   and DetectorAC1000V/rms(between   the shell and screws)

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


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