MEWOI2400 Overhead Line Ground Fault Inspection Instrument

MEWOI2400 overhead line ground fault inspection instrument is a new type of line ground fault inspection device carefully developed by our company. It is suitable for inspecting single-phase ground faults on overhead high-voltage lines not longer than 25 kilometers. Need to stop running. The instrument can accurately find hidden ground faults such as single-phase metallic grounding, arc grounding, transition resistance grounding, porcelain bottle breakdown, and arrester breakdown of overhead lines.

        MEWOI2400 Overhead Line Grounding Fault Inspection Instrument is composed of host, testing clamp, test line, grounding needle, insulating rod and accessories. The host and testing clamp adopt wireless communication. The host adopts a 7-inch color screen, the fault direction is clear, and the test results are clear at a glance. The host has a voice broadcast function, and the voice prompts the direction of the line fault, making the on-site operation easier. The innovative detection clamp integrates signal transmission and collection. The clamp structure is small in size and light in weight. work efficiency. The detection clamp is equipped with a non-contact electroscope, which can check whether the cable is charged, and emits an audible and visual alarm to ensure the safety of operators and equipment. The instrument also has a Bluetooth communication function. After downloading the APP, you can test, view test results, and view historical records on your mobile phone.

      MEWOI2400 Overhead Line Ground Fault Detector can locate multiple lines ground faults. After the overhead line is out of service, start testing section by section from one end of the line, apply low-frequency high-voltage signals to the line by the detection clamp and detect the current on the left and right sides, and display the direction of the ground fault point on the host by analyzing the pulse current and impedance on the left and right sides ( yellow direction or red direction). The detection pliers have corresponding yellow end and red end. Test section by section along the direction indicated by the fault point. Before the fault point, the test result shows that the fault point is behind it; after the fault point, the test result shows that the fault point is in front of it. Thereby, the fault point is approached segment by segment, and the fault location is determined.

1) The innovative integrated detection clamp integrates signal transmission and collection. The clamp structure makes it easy to mount. The line fault test can be completed in one mount. There is no need to divide the output signal and collect signal into two places, and there is no need to disconnect PT, the test is convenient and fast, reducing the number of operators and improving work efficiency.

2) The detection clamp is equipped with a non-contact electroscope. If the circuit under test is charged, it will send out a light alarm, and at the same time, the host will broadcast voice prompts to ensure the safety of operators and equipment.

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

4) The output voltage is as high as 8000V, and there are two options of 8000V and 3000V to meet the different needs of users.

5) Large-capacity rechargeable battery, which can complete the inspection work of the entire line after being fully charged.

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

7) The fault point of the 7-inch color screen is clear and clear.

8) Voice broadcast function, prompting the fault direction.

9) With Bluetooth communication function, the communication distance can reach 40m. After downloading the APP, you can test and view the test results on the mobile phone, and use it as a handheld receiver.

After the overhead line is out of service, the main engine outputs a low-frequency high-voltage signal, and the transmission 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, and 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, it can be judged whether the current load is capacitive or inductive. Compare the magnitude of the purely resistive impedance on the left and right to determine whether the ground fault is on the left or the right. Hang the detection pliers on the line in turn along the line, and the hand-held receiver indicates the direction of the fault point, so as to gradually approach the fault point.

Function

Overhead Line Ground Fault Finding