UHF PD Tester Technical Parameters
Technical Parameters Table
|
Technical Characteristics |
|
|
Channels |
2 electrical signal interfaces, one external sync interface |
|
Sampling Rate |
0.5M, 1M, 2.5M, 5M, 10M, 20Mselectable |
|
Sampling Accuracy |
12bit |
|
Range Switching |
60dB, 40dB, 20dB, 0dB, -20dBtotal 5 levels |
|
Frequency Range |
20k-100kHz, 80k-200kHz, 40k-300kHz |
|
Range Non-Linearity Error |
5% |
|
Display |
|
|
Display Screen |
7” TFTtrue color touch LCDDisplay Screen |
|
Resolution |
800×480 |
|
Storage |
|
|
Physical Storage |
256MB DDR2, operating memory |
|
SDCard Storage |
Standard 16G card, upgradeable to 32G, for storing test records and data |
|
Interface |
|
|
RS232 |
For synchronous transmission with PCInterface |
|
USB |
Can connect external mouse, keyboard, and external mobile storage devices |
|
Power Supply Mode |
Battery powered (16.8V Li-ion) + External Power Supply (18V) provides 8 hours of continuous operation |
|
Electrical Signal Interface |
2 channels BNC Interface(2 on front and rear panels each), for signal input |
|
SMAInterface |
External Sync Interface |
|
SDCard Slot |
Supports up to 32G SD card |
|
Ethernet Port |
Expandable |
|
Ground Terminal |
For external grounding |
|
General Specifications |
|
|
CPU |
Clock Speed533MHz |
|
System |
WINCE6.0 |
|
Operating Temperature |
-20℃to 45℃ |
|
Storage Temperature |
-20℃to 60℃ |
|
Dimensions |
L×W×H: 249mm × 216mm × 167mm |
|
Weight |
4.7kg |
Detection Principle
PD signal propagation paths in transformers:
Pulse current (LC transmission loop)
High-frequency EM waves (requires UHF antenna in transformer)
Ultrasonic
PD signal sampling methods:
Broadband CT
Antenna (requires UHF antenna in transformer)
Ultrasonic Sensor
Detection Locations
Using broadband CT (CT) signal receiving position:
Core ground wire
Neutral ground wire
Modified bushing tap
Tank ground wire
Ultrasonic detection at tank wall.

Note: The above information and Technical Parameters are compiled and published by Yangzhou Darui Electric Co., Ltd.