Ultrasonic Partial Discharge Detector

When partial discharge occurs, ultrasonic wave, heat, light, magnetic and other physical phenomena are produced, in which ultrasonic wave will take the sound source as the center and propagate around in the form of spherical wave. HM2823 Ultrasonic Partial Discharge Detector uses the signal generated by the local discharge to judge the existence and position of the partial discharge, and combines the real-time display image and data to quickly diagnose the partial discharge condition. The locator integrates transient ground voltage and ultrasonic detection methods

● At the same interface with yellow, green and red warning values, ultrasonic and TEV PD waveforms are the first in China.

● Transient ground voltage (TEV) and ultrasonic wave are used to detect partial discharge in dBmV units

● Color LCD screen, the display effect is more intuitive, more friendly

● Add earphone monitoring mode, in ultrasonic mode, can realize the real-time monitoring of local amplifier signal through earphones;

● The display can display the waveform from time to time, store the valuable waveform, and store the test data automatically, which is beneficial to the inspection of test records and the subsequent analysis of test data

● High signal amplification, high sensitivity; Signal receiving range :15 m effective distance

● Moderate intensity of red laser, strong focusing ability, accurate positioning, safe and reliable, simple and practical

● Find and locate insulator discharge on tower, creeping of cable head in open air

● The main purpose is to detect the partial discharge of high voltage switchgear

● Easy to use, small size, light weight, easy to carry

3.1 TEV Performance parameter

sensor：capacitive character ；

measuring range ：-5～60dB，step length 1dB ；

resolution rate ： 1dB.

3.2 Ultrasonic measurement parameters

measuring range ： -11dB～ 68 dB ，step length 1dB；

resolution rate ： 1dB；

Sensor centre frequency： 40kHz±1kHz ；

Sensor diameter： 16mm.

3.3 Instrument hardware indicators

indicator：Color backlight LCD；

display resolution ： 320X240；

cross sensitivity：50us/Div ~2m s /Div；

Vertical sensitivity：4uv/Div ~400uv/Div (ultrasonic )；

400uv/Div ~40mv/Div（TEV）；

trigger mode：Auto, Norm,Sign；

PC connection interface：USB；

Charging mode：Special Charger；

data storage：SD card storage；

operate time：4 to 5 hours per set fully charged；

controller： membrane keyboard ；

junctor： 2.1 mm low voltage DC charger input；

3.5mm Stereo headphone socket ；

External ultrasonic sensor input；

earphone：Minimum 8 ohms.

3.4 work environment

working temperature ： -10～ 45 ℃；

humidity： 0 -90 % RH No condensation ；

3.5 size

size：host 245*132*45 mm；Parabolic diameter：275mm；

weight：1kg（host） 0.5kg（ sensor）；

3.6 battery charger

rated voltage ： 90 ~ 264V AC；

frequency: 47 - 63Hz；

charging voltage ：12V DC；

charging current ： 500 mA ；

Time to fully charge : 5 hours.

3.7 Parameters of hand-held ultrasonic concentrator

Sensor centre frequency：40 kHz；

Sensor diameter :16mm；

Outer diameter of parabolic reflector: 275mm；

Parabolic reflector standard diameter: 250mm；

working temperature ： -10 - 50 ℃；

humidity： 0 -90 % relative humidity ，No condensation.