I. Product Function

Apply for single-phase ground fault detection of overhead high-voltage lines, and accurately locates the ground fault point. Accurately search hidden ground faults of overhead line such as single-phase metallic grounding, arcing grounding, transition resistance grounding, insulator breakdown, and lightning arrester breakdown,etc.

II. Product Features

1. Innovative integrated the signal transmission and acquisition in a detection clamp. The clamp-shaped structure is convenient for detecting. The line fault test can be completed in once clamp detecting, which is no need to output and acquisition singal operations in two sites, and no need to disconnect the PT(phase voltage transformer). The detection is convenient and fast, reduce the number of operators and improving work efficiency.

2. The detection clamp is equipped with th non-contact electroscope. If the tested line is electrified, the detector will issue a light alarm, and the host will broadcast a voice prompt to ensure the safety of operators and equipment.

3. Especially suitable for faulty lines with cable branches. Strong short-circuit detection ability, which can detect the direct short-circuit fault of  0Ω grounding resistance.

4. The output voltage is up to 8000V, and there are two options of 8000V and 3000V to meet the different reqeust of users.

5. Equip with the large-capacity rechargeable battery, can complete the detection of the entire overhead line after being fully charged.

6. The detection speed is fast, and the test results can be obtained in a few seconds after hooking up the detector.

7. 7-inch color screen can display the fault direction is obviou and clear.

8. With Voice broadcast function, prompt fault direction.

9. With Bluetooth communication function, the communication distance up to 40m. After download and install the APP, can make the  test and view the test results on the mobile phone, which can use as a handheld receiver.

III. Test Principle

After the overhead line is stop working, the host of tester outputs low-frequency high-voltage signals, and the transmitting clamps on the left and right sides of the detection clamp apply AC voltage signals to the line respectively, and the high-sensitivity current transformer in the middle of the detection clamp detects the current amplitude and phase on both sides. The current passes through the host, the detection clamp, flows through the fault line, enters the ground at the ground fault point, and returns to the host through the ground pin.

The output of the instrument is a high-voltage AC signal. The distributed capacitance and the fault grounding resistance form an RC parallel circuit. By detecting the voltage and current signals on both sides of the line and the phase between the voltage and the current, can judge whether the present load is a capacitive or inductive, and compare the magnitude of the resistive and impedance on the left and right to confirm whether the ground fault is on the left or right. Hook up the detection clamps on the line one by one along the line, and the hand-held receiver indicates the direction of the ground fault point, so as to  approach the fault point gradually.

IV. Technical Specifications

VI. Packing List