Standards 

The portable 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

Technical Specification

5.1 Applications 

The tester is applicable to switchgear cabinet, transformer and GIS Partial discharge online test and positioning.

5.2 Environment 

Altitude:≤3000m

Temperature:-20~60℃   

Relative humidity :≤95%

5.3 Technical data 

5.3.1 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 sensor

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)Ultrahigh frequency sensor          

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

Detection sensitivity:1dB                 Gain:>65dbm

5.3.2 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.

5.3.3 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.