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    GDHX-9700 Phase Detector hits:

    General Information

    GDHX-9700 Phase Detector is mainly used in electric power lines, phase and phase sequence calibration in substation, with main functions including electrical inspection,  phase calibration and phase sequence measurement. It uses double shielding and brand new digital circuits, with strong anti-interference, accorded with EMC standards, suitable for various electromagnetic interference situations.


    The high voltage phase signal of measured lead will be transmitted directly after treatment, the handset will receive and make phase comparison, determine the results after phase detection, real-time display phase angle difference and vector.It uses wireless transmission technology, safe and reliable, fast and accurate, suitable for using at different voltage levels (10V-500KV). When checking the grid structure, it is able to accurately identify the relative phase of different leads for the three-phase connected line, without any electrical connection between two measurement components, which makes the application of the measurement device very flexible and safe.


    • Voltage range: 10V~500KV, applicable for various voltage grades.
    • Accuracy: from a short distance: error ≤±3°; from a long distance: error ≤±3°.
    • Sampling rate: 10 times/second.
    • Date and time setting: date and time adjustment, easy for users to browse, view the historical data.
    • Backlight setting: normally on, normally off, user-defined within 0~999s.
    • Auto shut-down: never, user-defined within 0~999 minutes.
    • In-phase: ≤20° (user-defined if phase threshold is within 0-90°, default 20°)
    • Out-phase: >20° (user-defined if phase threshold is within 0-90°, default 20°)
    • On-site calibration function: on-site calibration can be carried out on the tested wire to ensure the accuracy of phase angle.
    • Multiple mode design, better applicability, more secure, more convenient.
    • Unique human-machine interface, simple operation.
    • FCC antenna design, stronger signal, easier to penetrate walls, doors and barriers.
    • Double shielding, strong anti-interference, in full compliance with EMC standards.
    • Charts and data display, easier to read, with date and time display function.
    • Qualitative measurement: display by acoustooptic signal.
    • Quantitative measurement: real-time display of phase angle difference, error ≤5°.
    • Phase sequence check: positive phase sequence, negative phase sequence (120°, 240°).
    • Under GPS satellite timimg service, the detection distance between detector Xa and Ya is ≥500km.
    • Data storage capacity of 2000 groups. It can query and access to historical data.
    • The length of standard insulation rod is 4m, and the applicable voltage grade of insulation rod is ≤220KV.


    Voltage range


    Power supply

    Hand-held unit: large capacity lithium battery

    Xa & Ya detector: AA size alkaline battery(1.5V) 3pcs

    Wireless transmission

    Visual distance 150m


    ≤20°(user-defined if phase threshold is within 0-90°)


    20°(user-defined if phase threshold is within 0-90°)

    Display accuracy

    Quantitative measurement ≤5°

    Resolution of phase angle

    Phase sequence measurement

    Phase sequence is determined through clockwise 120°/ counter-clockwise 240°

    Satellite timing range

    2~30 minutes


    Positive type LCD screen, clear in the sunlight.

    Working temperature


    Storage temperature


    Relative humidity

    ≤95RH, condensing

    Hand-held unit

    0.31 kg

    Detector Xa

    0.16 kg

    Detector Ya

    0.16 kg

    Address: F/10, Block B7, JinYinTan Modern Enterprise City, Dongxihu District, Wuhan, China
    Tel: +86-27-85568138
    Fax: +86-27-65606183
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