Single-Channel Partial Discharge Tester - Yangzhou Dary
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Main Features of the Product
1. Strong anti-interference capability and accurate detection data
Digital filtering technology effectively eliminates on-site interference, enabling partial discharge measurement even in strong interference environments.
2. High-sensitivity sensors that can sensitively reflect the partial discharge status inside equipment
Using broadband UHF sensors for partial discharge, the detection frequency band can cover 300MHz-1.5GHz (any frequency band optional), effectively capturing partial discharge signals inside GIS equipment.
The ultrasonic sensor adopts advanced technology, validated by practical application, capable of detecting weak discharge signals, ensuring effective detection of partial discharge signals inside high-voltage equipment.
The TEV sensor uses polytetrafluoroethylene material with good dielectric constant at the contact part with the switchgear cabinet, with built-in receiving electrodes, forming a capacitance with the cabinet wall, coupling discharge signals inside the cabinet to the sensor for signal processing, ensuring effective detection of partial discharge signals inside the switchgear.
The high-frequency current transformer uses an active zero-flux design principle, not only meeting the acquisition of mA-level current signals but also having strong anti-interference capability.
3. Simple and convenient installation
The contact ultrasonic sensor can be directly attached to the outer wall of high-voltage equipment, making operation simple and safe.
The high-frequency current transformer has a circular open design, making it easy to clamp onto different grounding wires.
4. Simple and convenient connection
The system adopts multiple connection methods, with BNC, SMA interfaces, and optical fiber options between sensors and the host, for ease of use.
5. Built-in large-capacity lithium battery for long endurance
The device has two power supply modes: battery and external power. Using battery power allows convenient detection of high-voltage equipment over a wide area, with continuous operation time not less than 4 hours; for long-term continuous use, simply provide AC220V±10% AC power.
Technical Specifications
3.1 Applicable Scope
Capable of live partial discharge inspection of high-voltage electrical equipment in operation, suitable for transformers, GIS, switchgear, cables, and other high-voltage electrical equipment.
3.2 Product Technical Specifications and Standards
1) IEC60270 "Partial Discharge Measurements"
2) GB/T7354 "Partial Discharge Measurements"
3.3 Operating Environment
1) Ambient temperature: -10℃ to 50℃
2) Relative humidity: ≤95%.
3) Altitude: ≤1000m
3.4 Host Technical Parameters
Measurement channels: 4 independent measurement channels, each supporting optical and electrical dual input modes
Sampling accuracy: 12Bit
Sampling rate: 60MHz per channel
Detection sensitivity: 1pC
Measurement range: 1pC～100nC
Nonlinearity error in this range: ≤±5%
Capacitance range of test object: 6pF～250μF
Voltage surge withstand capability: 2500V, at signal port, power port, to ground (positive, negative)
Charging power: AC220V±10%; frequency 50Hz; power <50W
Built-in rechargeable battery: continuous operation for more than 4 hours
3.5 Sensor Technical Parameters
3.5.1 UHF Sensor
Detection frequency band 300MHz～1.5GHz
Signal transmission method 50Ω coaxial cable
Detection sensitivity 1dB
Gain ＞65dbm
3.5.2 Contact Ultrasonic Sensor
Detection frequency band 20kHz～120kHz
Signal transmission method 50Ω coaxial cable
Effective sensitivity 10pC
3.5.3 High-Frequency Current Transformer
Detection frequency band 10kHz～30MHz
Signal transmission method 50Ω coaxial cable
Detection sensitivity 10pC
3.5.4 TEV Sensor
Measurement signals Ultrasonic signal, electrical signal
Ultrasonic measurement frequency band 20kHz～120kHz (center frequency 40kHz)
TEV measurement frequency band 10MHz-100MHz
Note: The above information and technical parameters are compiled and released by Yangzhou Dary Electric Co., Ltd.!
