ETCR EM9570 Multifunctional High/Low Voltage CT Turn Ratio Tester
  • Product Series : Wireless CT Turn Ratio Tester

    • Main Features

      Current, variable ratio, angle difference test, polarity and phase difference judgment of the first and second circuits of high and low voltage current transformers
      Primary high voltage current clamp range: 0.00A~800A
      Primary flexible current clamp range: 0.0A~3000A
      Secondary current range: 0.00mA~5A
      Variable ratio range: 1~9999
      Frequency range: 45Hz~65Hz
      Phase range: 0~360°
      Power factor range: -1.0000~1.0000
      Active power range: 0W~1800kW
      Reactive power range: 0Var~1800kVar
      Harmonic analysis: 2~31 times
      Wireless transmission distance: 40m
      Storage function: store 2000 sets of data
      USB communication interface
      Bluetooth communication
      Rechargeable lithium battery

    Product Introduction

    ETCR EM9570 Multifunctional High/Low Voltage CT Turn Ratio Tester, also known as transformer current variable ratio tester, transformer ratio difference tester, current transformer variable ratio tester, is used for primary current and secondary current size, variable ratio, angle difference, phase difference and polarity judgment of current transformers below 35kV.The instrument can also measure the voltage, current, leakage current, phase, frequency, active power, reactive power, power factor, harmonics and other power parameters of the power system, and can also display the waveforms of voltage and current, the harmonic content of the AC signal and the waveform distortion rate.It is widely used in substations, power plants, power inspection departments, industrial and mining enterprises, testing stations, electrician maintenance departments for current detection, anti-theft and field electrician operations.


    ETCR EM9500B Multifunctional High/Low Voltage CT Turn Ratio Tester consists of a handheld terminal, a small current clamp, a flexible current clamp, a high-voltage current clamp, a test line, a high-voltage insulating rod, and a host computer software. The high-voltage current clamp is made of high-performance permalloy and has high test accuracy.The handheld terminal adopts a 5-inch touch color screen and a Chinese interface, and all test results are displayed on the same screen.The high-voltage pliers have a unique automatic plug-in structure, which can easily clamp or evacuate the wire under test by pressing or withdrawing the insulating rod, and the operation is safe, time-saving and fast.The flexible current clamp is lightweight and small, suitable for places with small spaces (such as busbars in power distribution cabinets, etc.).The instrument has two measurement modes, wired or wireless, which can cope with various test sites, and the transmission distance of the wireless test mode is up to 40 meters.The insulating rod is lightweight, has the characteristics of moisture-proof, high temperature resistance, impact resistance, bending resistance, and high insulation, and the insulation level is 110kV.The instrument has a storage function, a USB communication interface, and the stored data can be uploaded to a computer for historical data reading, viewing, saving, printing, etc.


    1. It has perfect functions and can measure the variable ratio of high and low voltage current transformers.It can also measure the voltage, current, leakage current, phase, frequency, active power, reactive power, power factor, harmonics and other power parameters of the power system.
    2. Automatically calculate the variable ratio, variable ratio error and angle difference of the current transformer.
    3. Analyze and measure the harmonics and distortion rates of voltage and current within 31 times.
    4. Display voltage and current waveforms.
    5. There are two measurement modes, wired and wireless, which can easily cope with various measurement occasions.
    6. The handheld terminal adopts a 5-inch TFT touch color screen with a Chinese interface and a clear and beautiful display.
    7. GPS synchronization is timed to ensure synchronization and record the longitude and latitude of the measurement location.
    8. Configuration management analysis software, running in the WINDOWS operating system, friendly interface, with graphics and curve analysis functions, convenient data management.
    9. Storage function, 2000 sets of data are stored, and the shutdown data is not lost.
    10. USB communication interface.
    11. Bluetooth communication.
    12. Rechargeable lithium battery.


    Technical Parameters

    1.Measurement & Error

    Measurement ParameterMeasurement RangeResolutionError Range
    Voltage0V~20V0.001V±0.3%FS
    20V~200V
    200V~600V
    Small Current Clamp I10A~2A0.1mA±0.3% Reading ±0.2%FS
    2A~10A
    Flexible Current Clamp I20A~30A0.01A±0.5% Reading ±0.5%FS
    30A~300A
    300A~3000A
    High Voltage Current Clamp I30A~200A0.001A±0.3% Reading ±0.2%FS
    200A~600A
    Frequency45Hz~65Hz0.0001Hz±0.05Hz
    Phase0~360°0.1°±3°
    Turn Ratio1~99991----
    Power Factor-1.0000~1.00000.0001----
    Active Power0W~1kW0.1mW±0.3%FS
    1kW~1800kW0.1W
    Reactive Power0Var~1kVar0.1mVar±0.3%FS
    1kVar~1800kVar0.1Var
    Harmonics2~31 times


    2.General Specifications

    Host Power SupplyDC 7.4V 5200mAh rechargeable lithium battery
    Current Clamp Power AupplyDC 7.4V 600mAh rechargeable lithium battery
    Display Mode5 inch touch color screen
    Handheld Terminal Size210mm×129mm×68mm
    Small Current Clamp SizeClamp jaw size:17×18mm; overall size: 137mm×40mm×19.5mm
    Flexible Current Clamp SizeClamp jaw size:Φ200mm; overall size: 200mm×245mm×13mm
    High Voltage Current Clamp SizeClamp jaw size:Φ48mm; overall size: 255mm×84mm×39mm;
    Weight5.5kg (include tool kit and insulating rod)
    Wireless Communication MethodBetween the host and the current clamp: 433 communication
    Host positioning: GPS communication
    Current Clamp Wireless Transmission DistanceWireless transmission distance 40m (in an open environment)
    Current Clamp Lead Length5 meters
    Shift GearsFully automatic gear shift
    Memory2000 groups, press the SAVE button to automatically number and store (no data will be lost if the battery is powered down or replaced)
    Data AccessYes
    Automatic ShutdownAfter about 15 minutes of power-on, the meter will automatically turn off
    Data UploadEquipped with USB interface and host computer software, the test results can be uploaded to the computer for data analysis and historical record query
    Bluetooth FunctionYes, it supports the Android system. After installing the APP, you can perform test operations and view test results on the mobile terminal.
    Battery VoltageThe host battery level is displayed, and the battery voltage is reminded to charge in time when it is lower than 10%; the flexible current clamp and the high-voltage current clamp indicator lights up when the battery voltage is lower than 10%.
    External InterferenceAvoid extra-strong electromagnetic fields; avoid 433MHz and 315MHz interference at the same frequency
    Insulation Rod Size4300mm
    Insulating Rod Withstand Voltage110kV
    Insulation StrengthHost and detector: AC1000V/rms (between shell and screw)
    Working Temperature & Humidity-15℃~50℃; below 80%RH
    Storage Temperature & Humidity-10℃~60℃; below 70%RH


    Model Comparison










    Product PictureProduct Model NameLine Voltage LevelPrimarary Current RangeSecondary Current RangeWireless DistanceTurn Ratio RangeAngle Difference TestOthers
    EM9500B (1)~1.jpgETCR EM9500B Wireless High Voltage CT Turn Ratio Tester≤35kV0.0A ~800A0.00mA~5A100m1~9999--
    EM9500C-016 (1)~1.jpgETCR EM9500C-016 Three-Channel Wireless High Voltage CT Turn Ratio Tester≤35kV0.0A ~800A0.00mA~5A100m1~9999--Simultaneous measurement of 3 channels secondary currents
    EM9500C-030 (1)~1.jpgETCR EM9500C-030 Three-Channel Wireless High Voltage CT Turn Ratio Tester≤35kV0.0A ~800A0.00mA~10A100m1~9999--Simultaneous measurement of 3 channels secondary currents

    ETCR EM9550B Wireless High/Low Voltage CT Turn Ratio Tester≤35kV0.0A ~800A /3000A0.00mA~5A100m1~9999Yes  

    ETCR EM9570 Multifunctional High/Low Voltage CT Turn Ratio Tester≤35kV0.0A ~800A /3000A0.00mA~10A--1~9999Yes  Harmonics/Voltage/Power measurement, Bluetooth
    EM9600 (1)~1.jpgETCR EM9600 Low Voltage CT Turn Ratio Tester380V/220V0.0A ~800A0.00mA~5A--
    1~9999Yes  
    EM9620 (1)~1.jpgETCR EM9620 Low Voltage CT Turn Ratio Tester380V/220V0.0A~3000A0.00mA~5A100m1~9999Yes  
    EM9620B (1).jpgETCR EM9620B Low Voltage CT Turn Ratio Tester380V/220V0.0A~3000A0.00mA~5A100m1~9999--


    Product Video

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