I. Adoption standard

The HZ-9003C multifunctional partial discharge tester is designed per the following standards:

GB/T 7354-2003 Partial discharge measurement

GB 4793.1-2007 Safety requirement for electric equipment for measurement, control, and laboratory use- Part 1: General requirements,

GB/T 2423.8-1995 Environmental testing for electric and electronic products,

GB 2900 Electrotechnical terminology

GB/T 16927 High voltage testing techniques

DL/T 356-2010 Calibration specification of partial discharge measuring devices

DL/T 417-2006 Guide for Partial Discharge Measuring of Power Equipment

IEC1000 Electromagnetic compatibility

II.Technical data

1.3.1 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

1.3.2 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.

1.3.3 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.