1. System Introduction
The partial discharge detector can be used with UHF sensors, TEV sensors, acoustic-electric combined sensors, ultrasonic sensors and wideband current transformers (HFCT) to detect partial discharge of high-voltage equipment such as transformers, high-voltage switchgear, GIS, cable joints, etc. It is easy to carry, fast to measure, strong in anti-interference ability, and convenient for on-site use.
Its configuration software has functions such as real-time waveform diagram, large peak display, and positioning. The software can also analyze a certain phase waveform in detail, and the window can be enlarged and reduced at will. It can also perform spectrum analysis on the data segment, analyze the spectrum content of the discharge waveform, make the discharge waveforms more comparable, and comprehensively statistically analyze the test data to reduce the impact of non-stability factors on the test results.
This instrument uses automatic or manual recording to save test data and transient discharge waveforms, providing a reference for later data analysis.
2. Technical parameters
Technical characteristics |
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Number of channels | 2/4 electrical signal interfaces, 1 external synchronization interface |
Sampling rate | Maximum 200MSa/s |
Sampling accuracy | 12bit |
Range | 100dB |
Range switching | 0-9共10档 |
Frequency band | 1Hz-60MHz |
Non-linear error of this range | 5% |
Detection sensitivity | ≥5pC (under laboratory conditions); ≥10pC (under field conditions) |
Spectrum display mode | 5 displays: 2D PPRS display, 3D PRPD display, sine display, statistics, spectrum (AE) |
Power Mode | Built-in lithium battery/AC 220V |
show |
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Display | 6.5-inch TFT true color touch LCD display |
Resolution | 640×480 |
storage |
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Physical Storage | 4GB |
harddisk | 32G solid state hard disk for storing test records and test data |
interface |
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RS232*1 | Used for synchronous transmission interface with PC |
USB*2 | Can connect external mouse, keyboard, and external mobile storage device |
Power Mode | Battery power supply (16.8V lithium battery) + external power supply (220V AC) |
Electrical signal interface | 2/4-way BNC interface for signal input |
E-Trig Interface | External synchronization interface |
Network port*1 | For connecting to the network |
Ground button | External grounding |
General instructions |
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CPU | Main frequency 1.6GHz |
system | WIN7 |
Operating ambient temperature | -20℃至60℃ |
Storage environment temperature | -20℃至85℃ |
size | 280*190*80 mm |
weight | 3.5kg |
Configuration List |
Host | For signal acquisition, waveform display, data processing, and storage |
Ultrasonic Sensors | Used to measure ultrasonic signals generated by partial discharge |
Sensitivity | >60dB |
Ultra-high frequency sensor (UHF) | Used to measure the ultra-high frequency signal generated by partial discharge in GIS |
Detection frequency | 300～1800MHz |
Resolution | ±0.5dB |
HFCT (High Frequency Current Transformer) | Used to measure partial discharge signals passing through the equipment grounding wire |
Detection band | 0.5～30MHz |
TEV Sensors | Used to measure partial discharge and positioning of high-voltage equipment such as switch cabinets |
Signal acquisition | Capacitive |
Detection frequency | 3～100MHz |
Measuring range | 0～60dB |
Non-contact ultrasonic sensor |
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Measuring range | 5dBpV-70dBpV |
Resolution | 1dB |
Center frequency | 40kHz |
Focused Ultrasonic Sensors |
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Measuring range | 5dBμV-70dBμV |
Resolution | 1dB |
Center frequency | 40kHz |
3. Reference standards
Common technical requirements for high-voltage switchgear and control equipment standards DL/T 593
3.6kV～～40.5kV AC metal-enclosed switchgear and control equipment DL/T 404
3.6kV～～40.5kV AC metal-enclosed switchgear and control equipment GB 3906
Partial discharge measurement GB/T 7354
Guidelines for on-site measurement of partial discharge of power equipment DL/T 417
High voltage test technology Part 1: General test requirements GB/T 16927.1
High voltage test technology Part 2: Measurement system GB/T 16927.2
High voltage test technology Part 3: Definition and requirements of on-site test GB/T 16927.3
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