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
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.
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