Multifunctional Partial Discharge Detector

Model: HJF-500

The Multifunctional Partial Discharge Detector HJF-500 is the ideal non-invasive tool for quick measuring partial discharge activity in MV and HV substations.

Both MV and HV substations can be monitored using the HJF-500 thanks to the wide variety of sensors which can be connected to it. Typical MV and HV assets that can be diagnosed for partial discharges include Switchgear, Transformer, GIS and HV cable etc.

The high bandwidth together with PRPD(phase resolved partial discharge) pattern display can categories the different types of defect. Corona discharges and surface discharges can be easily distinguished from the dangerous internal partial discharges, which is another advantage of this type of technology.

The HJF-500 unit can be operated via 4-inch touch screen. The built-in lithium battery is adopted for HJF-500 unit, and the operating time is more than 6 hours.

Main Features

●Non-invasive tool for online PD measurement in MV and HV substations

●Able to equip with 5 sensors, including 1 built-in TEV sensor(standard configuration), 1 built-in ultrasonic sensors(standard configuration), 1 external ultrasonic sensor(option configuration), 1 external UHF sensor(option configuration), 1 HFCT sensor(option configuration).

●Combines multiple functions in a single package

●Ultrasonic and TEV sensors for surface and internal PD

●UHF measurement can accurately measure PD activity in high bandwidth

●PD activity in HV cables is measured by using HFCT

●High sampling rate, strong anti-interference ability

●Synchronization with the power frequency for PRPD pattern recognition

●Provide time domain signal waveform, PRPD spectrum, PRPS spectrum etc. discharge patterns to realize the analysis of different discharge types.

●The test results can be stored on board, also can be uploaded to PC for generated test report.

Technical Data

●TEV Measurement

Measuring range: 0-60dBmV

Resolution: 1dB

Accuracy: ±1dB

Maximum pulse per cycle: 1400

Measurement frequency band: 3~100MHz

●UHF Measurement

Detection frequency: 300-2000MHz

Measuring range: 0-60dBmV

Accuracy: ＜1dBmV

Sensor band: 300-2000MHz

●AA Measurement

Measuring range: -6dBμV~68dBμV

Resolution: 1dB

Accuracy: ±1dB

Sensor center frequency: 40kHz

●AE Measurement

Measuring range: -6dBμV~68dBμV

Resolution: 1dB

Accuracy: ±1dB

Frequency range: 20~200kHz

●HFCT Measurement

Sensor transmission impedance: 5mV/mA

Detection frequency: 1～30MHz

Sensitivity: ≤50pC

●Display: 4.0-inch RGB LCD screen

●Power Supply

Built-in battery: 3.7V/5000Ah lithium battery

Working time: more than 6 hours

Battery charger: AC90-264V or DC 5V

●Environmental Conditions

Operating temperature: -20 ~ 50℃

Humidity: 20-85% relative humidity

●Miscellaneous

Dimensions(handheld host): 210x100x35mm

Weight(handheld host): 0.4kg

Connection port: one USB port for PC connection or charger input, one external sensor port, one 3.5mm stereo headphone jack

Earphone: minimum 8 ohm

SD card: standard 16G

The Multifunctional Partial Discharge Detector HJF-500 is the ideal non-invasive tool for measuring partial discharge activity of Switchgear, Transformer, GIS and HV cable etc. in MV and HV substations.