HZ-9003C Handheld Multifunctional Partial Discharge Detector

Overview

HZ-9003C multifunctional partial discharge tester is used for on-line detection and location of partial discharge of HV equipment, which is designed based on our many years experiences in the partial discharge measuring fields.

The system is equipped with composite TEV sensors, ultrahigh frequency sensors, High-frequency current transformers and high sensitivity ultrasonic sensors to collect partial discharge signals at high voltage equipment. The system adopts multilevel detect frequency reduction techniques to reduce the discharge frequency of the signals, meantime using high-speed AD conversion circuit to complete the signal digitization, also by using digital signal processing, adaptive filtering interference signal processing methods to ensure the reliability of the testing data. By collecting different signals produced from the partial discharge in different high equipment, the equipment operation status can be detected rapidly. The tester can be installed for detection with equipment operation and without any effect to the equipment operation. This will help the workers to make evaluation timely for the switchgear cabinet operation status, and thus greatly improve the equipment operation reliability, safety and effectiveness.

HZ-9003C Multifunctional Partial Discharge Tester include: device host、special partial discharge detection software、TEV sensor (TEV) 、ultrasonic sensor (USS)、ultrasonic concentrator (ELTW) 、high frequency CT (HFCT) 、UHF sensor (UHF) 、earphone and connecting wire.

Technical data

Tester measurement data requirement 

（1）Composite TEV measurement

Sensor: Capacitive                        Range：0～60dBmV

Resolution：1dB；                       Error：±1dB

Detection Bandwidth：5~70MHz            Pulse/Cycle maximum：655

Threshold adjustment range：3～57dB

（2）High frequency current transformer

Detection Bandwidth：10kHz～30MHz      Signal transit mode:50Ω cable

Detection sensitivity: 10pC

（3）Ultrasonic concentrator

Measurement range：-7dBμV～68 dBμV     Resolution：1dB

Error：±1dB    Sensor sensitivity：-65dB (0dB = 1volt/μbar effective value SPL)

Sensor central fequency:20～50kHz       Sensor diameter: no more than 50mm

Heterodyne frequency：38.4kHz

（4）Non - contact ultrasonic energy collector

Effective acceptance distance: 30m; Sensor center frequency: 40 kHz;

Diameter of sensor: 16mm; External diameter of parabolic reflector: 275mm;

Standard diameter of parabolic reflector: 250mm; Weight: 0.6kg;

（5）Ultrahigh frequency sensor          

Detection bandwidth：300MHz～1.5GHz    Signal transit mode：50Ω cable

Detection sensitivity：1dB                 Gain：＞65dbm

（6）Anti-interference Earphone Mic

Earphone Mic：vivo

Hardware 

Enclosure: With protective enclosure, the protection grade is reached or better than IP53.

Connectors: Earphone port, low voltage DC charger input, external ultrasonic sensor input.

Main tester weight: no more than 3Kg.

Display: LED and with battery state indication.

Power Supply 

Internal battery: equipped with rechargeable battery, when the battery voltage is low the main tester will shut down itself.

Battery continuous operation time: Single channel mode is more than 6 hours, Multiple channels mode is more than 3 hours.

Battery charging: Use 220V power to charge, the charging time is no more than 8 hours.

The battery charge protection grade: IP54.