Product introduction
Partial discharge detector is a portable electronic detection device specifically designed to detect, locate, evaluate, and diagnose the presence and severity of partial discharge activity inside or on the surface of power equipment (such as transformers, GIS, switchgear, cables, motors, generators, etc.) on site (without power outage or in a power outage state).
Product Parameters
TEV measurement
| Measuring range | 0dB-60 dB |
| Resolution | 0.1dB |
| Precision | ±1dB |
| Maximum pulse per cycle | 1400 |
| Measurement frequency band | 3~100MHz |
AE measurement
| Measuring range | 0dB~60dB |
| Resolution | 0.1dB |
| Frequency Range | ±1dB |
| Frequency Range | 20~200 kHz |
AA,AA1,AA2 measurement
| Measuring range | 0dB~60dB |
| Resolution | 0.1dB |
| Precision | ±1dB |
| Sensor center frequency | 40kHz |
UHF measurement
| Detection frequency | 300-2000MHz |
| Measuring range | 0-60 dBV |
| Sensitivity | ＜1dBm |
| Sensor frequency band | 300-2000MHz |
HFCT measurement
| Sensor transmission impedance | 5mV/mA |
| Detection frequency | 1～30MHz |
| Resolution | 0.1dB |
| Sensitivity | ≤50pC |
Hardware
| Shell | ABS |
| Screen | 4.3 inch RGB LCD screen, resolution 800*480 |
| Sampling accuracy | 12bit |
| Synchronization mode | Internal synchronization |
| Connector | USB interface (also charger input) |
| 3.5mm stereo headphone jack | |
| External sensor input interface | |
| Earphone | 8 Ω minimum |
| SD card | Standard configuration 16G ~ 64G |
| Built-in battery | 3.7V/10000mAh lithium battery |
| Operating hours | Approxi. 12 hours |
| Charger | DC 5V/3A |
| Operating temperature | -20 ~ 50℃ |
| Humidity | 20-85% relative humidity |
| Volume and weight | 210*100*35(mm) 0.4KG(host) |
core purpose of partial discharge detector
Early warning: Identify potential insulation defects before catastrophic equipment failures occur.
State assessment: Evaluate the health status of equipment insulation and determine its operational risk level.
Fault location: Help determine the specific location of discharge and guide maintenance.
Preventive maintenance: Provide scientific basis for the maintenance plan of power equipment, achieve condition based maintenance, and reduce unnecessary power outages and maintenance costs.
Quality control: Conduct partial discharge testing before the new equipment is put into operation or after maintenance to ensure quality.
advantage
Non power outage detection: Most of the detection can be carried out when the partial discharge detector is running with power on, without affecting the power supply.
High safety: Non invasive or indirect detection, operators maintain a safe distance from high-voltage parts.
Efficient and fast: Compared to traditional power outage prevention tests, the partial discharge detector has faster detection speed and wider coverage.
Early detection of hidden dangers: Problems can be identified in the early stages of insulation degradation.
Accurate positioning: helps to quickly locate the fault point, reducing repair time and costs.
Quantitative evaluation: Provide objective data to support decision-making and optimize maintenance strategies.
Reduce risk: significantly reduce the risk of power outages and safety accidents caused by sudden equipment failures.
Applicable scenarios
The Wuhan UHV partial discharge detector is suitable for the majority of high-voltage power equipment detection scenarios and is widely used in various fields such as power grid operation and maintenance, industrial and mining enterprises, rail transit, new energy power stations, substations, etc. The core applicable equipment is as follows:
High voltage cabinet equipment: Internal discharge, contact discharge, and insulation sleeve discharge detection of high-voltage switchgear, ring main unit, and inflatable cabinet, suitable for daily inspections and annual preventive tests. Single cabinet detection can be completed in seconds, efficient and convenient.
Transformer equipment: Internal insulation air gap discharge, winding discharge, and iron core suspension discharge detection for dry-type transformers and oil immersed transformers, accurately locating hidden faults inside the transformer and avoiding insulation breakdown accidents.
High voltage switches and GIS equipment: Partial discharge detection of GIS composite electrical appliances, vacuum circuit breakers, and isolation switches can accurately capture weak discharge signals inside enclosed equipment, solving the pain points of difficult detection and hidden danger investigation of enclosed equipment.
Power cable equipment: high-frequency partial discharge detection for high-voltage cables, cable joints, and cable terminals, quickly identifying issues such as cable insulation aging and joint discharge.
Transformer equipment: Insulation status detection of voltage transformers and current transformers, effectively identifying potential partial discharge hazards inside the transformers and ensuring accurate operation of secondary equipment.
FAQ
Q1: What is a partial discharge detector?
A: Partial discharge detector is a portable detection device used to detect and evaluate the insulation status of high-voltage electrical equipment. By collecting signals such as ultra-high frequency, transient ground voltage, ultrasound, and high-frequency current generated by partial discharge of equipment, potential insulation defects can be quickly detected, providing a basis for equipment condition assessment and preventive maintenance.
Q2: What equipment does the partial discharge detector mainly detect?
A: Depending on the configured sensors, it can be used for switchgear, ring main unit, transformers, etc GIS, Partial discharge detection of equipment such as power cables, overhead lines, cable terminals, and transformers.
Q3: Can the partial discharge detector be used for live detection?
A: Okay. Partial discharge detector usually adopts non-invasive detection methods, which do not require additional high voltage to be applied to the tested equipment and can be inspected under normal operating conditions. Therefore, it is particularly suitable for daily status detection of substations and distribution equipment.
Q4: What detection methods are used for partial discharge detector?
A: Common detection methods include TEV transient ground voltage, UHF ultra-high frequency, AE/ultrasonic, and HFCT high-frequency current. Different detection methods can be used for electrical equipment of different types and structures, and corresponding sensors can be selected according to actual applications.
Q5: What detection results can the partial discharge detector display?
A: According to specific models and software configurations, time-domain waveforms, PRPD spectra, PRPS spectra, pulse amplitudes, discharge frequencies, and related trend data can be displayed, providing data support for partial discharge type analysis and equipment status evaluation.
Q6: What is the anti-interference ability of the partial discharge detector on site?
A: There is a lot of electromagnetic interference in the actual substation environment, so partial discharge detectors usually use digital filtering, signal processing and other technologies to reduce the impact of interference and improve the reliability of detection data. The specific anti-interference performance should be evaluated based on the equipment model and on-site environment.
Q7: What parameters should be focused on when purchasing partial discharge detector?
A: Suggestions to focus on: detection methods, sensor configuration, detection frequency band, sensitivity, measurement range, anti-interference ability, data analysis function, spectrum type, data storage method, device battery life, and software functionality. If the main focus is on detecting GIS, switchgear, transformers, and cables, it is recommended to select the corresponding sensor combination based on the actual equipment.
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