Partial Discharge Detector for Overhead Line

Model: HJF-750

The Partial Discharge Detector HJF-750 is a handheld non-invasive tool for detecting partial discharge activities of MV and HV electrical equipment, especially for Overhead Line, Insulator, Arrester etc. in running state.

The HJF-750 can perform long-distance non-contact partial discharge detection, laser accurate positioning, maximum detection distance up to 30 meters. It also supports test on vehicles with a speed of 30km/h. With high sensitivity, strong directionality and directivity, the HJF-750 can accurately locate hidden faults of the overhead line without power outages. The ultrasonic test can be performed under noisy environment, not influenced by ambient sound.

Using rechargeable lithium battery as power supply, it can ensure the HJF-750 continues to work for more than 8 hours.

The HJF-750 is compact and light weight design, easy to carry, very suitable for live detection of outdoor overhead lines.

Main Features

●Portable design, small size, light weight, easy to carry

●4.3-inch touch screen for operation

●Able to detect open air electrical equipment, find and locate all kinds of partial discharge, such as corona, arc, flashover, creepage, wire break, arc pull etc.

●The camera and laser detector provide accurate positioning and easy focus to take photos of faulty equipment.

●The detected abnormal ultrasonic signal is converted into audible sound signal and waveform output.

●Embedded GPS receiver automatically stores coordinate data

●Able to test environmental temperature and humidity in real time

●Able to save data and play back data

●High sensitivity and directivity can accurately locate the overhead line fault.

●The test can be performed in a vehicle with a speed of 30km/h.

●Suitable for noise environment, not affected by environmental sound.

●No-contact testing(effective testing distance up to 30m) makes test much safer.

●Able to detect early fault phenomena before other detection methods such as infrared detection.

Technical Data

◇System: WINCE6.0

◇CPU: Main frequency 533MHz

◇Memory: RAM of 256MB DDR2, 1GB NandFlash

◇Screen: 4.3-inch TFT true color touch screen, resolution of 480x272

◇Interface: SD memory card, USB, serial port, earphones

◇SD Memory Card: 8GB

◇Camera: 3 mega-pixel high definition camera

◇Accessories: GPS, temperature /humidity measurement device, high brightness laser pointer

◇Storage function: GPS coordinate, date/time, temperature/humidity

◇Frequency range: 20-150kHz

◇Center frequency of sensor: 40kHz

◇General

●Power supply: built-in lithium battery, about 8 hours for continues work

●Charger of battery

Input: AC100-240V, 50/60Hz

Output: voltage 20V, current 3.25A

◇Environmental Conditions

●Storage temperature: -20°C to 70°C (-4°F to +158°F)

●Operating temperature: -20°C to +50°C (-4°F to +122°F)

●Humidity: < 95% RH, non-condensing

The Handheld Partial Discharge Detector HJF-750 is an indispensable professional inspection tool for transmission line maintenance personnel.