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HVJF-C Ultrasonic Partial Discharge Tester 6pF~250µF Capacitance Rang

Categories Partial Discharge Test Equipment
Brand Name: RISING
Model Number: HVJF-C
Certification: ISO CE
Place of Origin: China
MOQ: 1 SET
Payment Terms: L/C, L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 500 SET PER Month
Packaging Details: Wooden package
Capacitance rang: 6pF~250µF
Sensitivity: 0.1mV
Power supply: AC 220V
Work temperature: -20℃~50℃
Dimension: L249mm × W216mm × H167mm
Weight: 4.7kg
Humidity: <90%
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HVJF-C Ultrasonic Partial Discharge Tester 6pF~250µF Capacitance Rang


HVJF-C Ultrasonic Partial Discharge Tester 6pF~250µF Capacitance Rang


Product Description

Before partial discharge, the electric field force, mechanical stress and particle force around the discharge point are in relative equilibrium. When partial discharge occurs, the rapid release or migration of the charge changes the electric field, breaks the equilibrium state, and causes the surrounding particles to oscillate mechanically, thus producing sound or vibration signals, as shown in FIG. 4-1. The ultrasonic method measures partial discharge signals by installing ultrasonic sensors on the external wall of the equipment chamber. The characteristic of this method is that the sensor has no connection with the electrical circuit of the geographical equipment, and is not disturbed by the electrical equipment, but is easily affected by the ambient noise or the mechanical vibration of the equipment when used in the field. Due to the large attenuation of ultrasonic signals in the insulation materials commonly used in power equipment, the detection range of ultrasonic detection method is limited, but it has the advantage of high positioning accuracy. The spectrum of sound waves produced by partial discharges is very wide, ranging from tens of Hz to a few MHz. Signals with frequencies below 20kHz can be heard by the human ear, while ultrasonic signals above this frequency must be picked up by ultrasonic sensors. By measuring the sound pressure of ultrasonic signal, the discharge intensity can be estimated. In addition, the ultrasonic method can also detect different types of faults, such as suspension, tip, along the surface, etc., online detection does not affect the normal operation of equipment, has a high sensitivity, good anti-electromagnetic interference ability and has the advantages of high positioning accuracy.


Technical Parameters
Number of channels2 electrical signals and 1 external synchronization interface
Sampling rate10M
Sampling precision12bit
Range changing60dB,40dB,20dB,0dB,-20dB共5档
Nonlinear error of range5%
Synchronization modeInter sync,external sync, wireless sync
Wireless ultrasonic amplification×200
Ultrasonic detection frequency range20k—120kHz
Sensitivity0.1mV
Display 
Screen7” TFT true color touch LCD display
Resolution800×480
Storage 
Physical storage256MB DDR2,the running memory
SD card storageStandard with 4G card, can be upgraded to 32G, used to storage test records and test data
Interface 
RS232Used for synchronous transport interface with PC
USBExternal mouse and keyboard and mobile storage devices
Power supplyBattery power (16.8v lithium battery) + external power supply (18V) can provide continuous power supply for 6 hours
Electrical interface2 - way BNC interface for signal input
SMA interfaceexternal synchronization interface
SD card slotcan plug in an SD card that supports up to 32 gigabytes
Internet accessscalable
Ground connectionExternal grounding
Universal 
CPUDominant frequency 533MHz
SystemWINCE6.0
Work temperature-20℃~50℃
Storage temperature-20℃~60℃
Humidity<90%
DimensionL249mm × W216mm × H167mm
Weight4.7kg
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