Handheld Partial Discharge Detector

Model: HJF-750

Handheld Partial Discharge Detector HJF-750 is a non-invasive testing tool that can diagnose potential faults of overhead lines by collecting abnormal ultrasonic signals of overhead lines and analyzing them with software.

Handheld Partial Discharge Detector HJF-750 is in the state of no power outage to judge the hidden fault location and fault type. It can collect abnormal ultrasonic signal by ultrasonic detector(ultrasonic sensor) , then transmit the signals to the host, diagnose the fault and hidden fault type and severity level, and convert to audible sound signal and the output waveform.

Handheld Partial Discharge Detector HJF-750 can help testing personnel accurately find out faults and hidden dangers, prevent malignant faults happening, avoid unnecessary power outages, and improve the reliability of power supply.

Main Features

●Color touch screen is easy to operate.

●Handheld, visual, audible and display waveform, non-contact detection

●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.

●3 mega-pixel high-definition camera can easily focus detection point of failure and take photos of tower identification and faulty equipment.

●Embedded GPS receiver automatically stores the coordinate data and provides GPS navigation, which is convenient to query and save detection path.

●Able to test environmental temperature and humidity in real time.

●Able to save data and play back data.

●Moderate intensity green laser tracing is easy to track under sunlight.

●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.

●Ultrasonic test can be performed under noisy environment, not influenced by ambient sound.

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

●Non-invasive test will not affect normal operation of power grid.

●Use background software for easy data management and evaluation.

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

Handheld Partial Discharge Detector HJF-750 is powerful handheld tool for detecting all kinds of partial discharge of Overhead Line, Insulator, Arrester etc., such as corona, arc, flashover, creepage, wire break, arc pull etc.

HAOMAI ELECTRIC TEST EQUIPMENT CO.,LTD, as a subsidiary of HAOMAI ELECTRIC POWER AUTOMATION CO.,LTD, located in Shenzhen of China, mainly focuses on the sales and services of Protection Relay Test Set, Instrument Transformer Test Set, CT/PT Analyzer, Power Transformer Test Set, Circuit Breaker Testing Equipment, Battery Testing Equipment, IEC 61850 Testing Equipment for Smart Substation, Partial Discharge Detector, Transformer Oil Dissolved Gas Analysis and Moisture Monitor etc. electrical test equipment and online monitoring equipment.

The headquarters, HAOMAI ELECTRIC POWER AUTOMATION is established in 1999 and located in Wuhan of China, which is specialized in developing and manufacturing electrical test equipment and online monitoring equipment. HAOMAI products are widely used in power grid, petrochemical, metallurgy, railway, coal mine, research institutes and all kinds of large-scale factories or enterprises.

HAOMAI follows total quality criteria, and always maintains standardized process and procedures for continuous growth. HAOMAI has been certified by ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. All of HAOMAI products passed Type Test or Calibration in the third party laboratory accredited under ISO/IEC 17025.

HAOMAI builds own RELAYSTAR laboratory and performance test laboratory, and possesses professional production equipment and testing instruments in factory, such as Agilent 34401A 6 1/2 High-precision Meter, FLUKE Multi-meter, EMH Standard Meter, CLOU Standard Power Source, Oscilloscope, Phase Meter, Insulation Test System, High Voltage Dividers, AC High Voltage Generator, Time Calibration Tester, Standard Micro-resistance etc.

HAOMAI is China well-known mark recognized and approved by State Administration for Industry & Commerce of People's Republic of China, and enjoys high reputation in domestic and foreign markets.

HAOMAI now is the key supplier for SGCC(State Grid Corporation of China) and CSG(China Southern Power Grid). Till 2021 HAOMAI products have been sold to 39 different countries.

HAOMAI always sticks to the faith of "cooperation and sharing", takes the "technology and market" as the direction, "creation and innovation" as the soul, listens to clients carefully, and improves the technology, upgrades the products, optimizes the service and tries all to be the global leader in electrical test and measurement instruments field.