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Product — Partial discharge inspection instrument - live detection method — ZPD-903 Multifunctional partial discharge inspection instrument
Product name：ZPD-903 Multifunctional partial discharge inspection instrument
Executive standard：IEC62478，DL/T 417-2006,Q/GDW11063-2013, Q/GDW 11059.8-2013，DL/T 1416-2015,Q/GDW 11316-2014，DL/T 555一2004
Other name：Ultrasonic & UHF partial discharge inspection instrument, charged partial discharge inspection instrument, on-line partial discharge inspection instrument, handheld partial discharge inspection instrument
Component：PD host, ultrasonic sensor * 2, TEV sensor, HFCT sensor, UHF sensor, charging
| Purpose & brief description |
| ● ZPD-903 multifunctional partial discharge inspection instrument is mainly applicable to the live partial discharge test of primary equipment such as transformer, generator, motor, GIS, high-voltage switchgear and high-voltage cable. It is qualitative and quantitative, finds and locates the discharge point. It has simple operation and strong anti-interference ability. It is a powerful weapon for condition based maintenance; ● The system is equipped with composite TEV sensor, UHF sensor, high-frequency current transformer and high-sensitivity ultrasonic sensor to collect the internal partial discharge signal of high-voltage equipment; The system uses multi-level detection and frequency reduction technology to reduce the frequency of discharge signal, and uses high-speed AD conversion circuit to complete the digitization of signal, and ensures the reliability of detection data through interference signal processing methods such as digital signal processing and adaptive filtering; By collecting different signals generated by partial discharge in different high-voltage equipment, the running state of the equipment can be detected quickly; The instrument can be installed and tested under the operation state of the equipment, which has no impact on the normal operation of the equipment. It is convenient for the staff to evaluate the operation state of the switchgear in time, and greatly improve the reliability, safety and effectiveness of the equipment operation; ● ZPD-903 handheld partial discharge tester is composed of tester host, special partial discharge detection software, composite TEV sensor, ultrasonic sensor, high frequency current transformer, UHF sensor and connecting wire; |
| Test purpose |
| ● The purpose of partial discharge test is to find defects in equipment structure and manufacturing process; For example, the local electric field intensity inside the insulation is too high; Metal parts have sharp corners; The insulation is mixed with impurities or partially defective, and the electrical connection between metal grounding parts and conductors in the product is poor, so as to eliminate these defects and prevent partial discharge from damaging the insulation; ● Partial discharge refers to the non penetrating discharge between the electrodes of the insulating medium in the high-voltage apparatus under the action of high electric field intensity; Therefore, the function of local discharge test can detect the potential insulation hazards of power equipment; |
| Technical parameter |
| ● Instrument measurement parameter requirements (1) Composite TEV measurement Sensor: capacitive; Measuring range: 0 ~ 60dbmv; Resolution: 1dB; Error: ± 1dB; Detection bandwidth: 5 ~ 70MHz; Maximum pulse / cycle: 655; Threshold adjustment range: 3 ~ 57db. (2) High frequency current transformer Detection frequency band: 10kHz ~ 30MHz signal transmission mode: 50 Ω coaxial cable Detection sensitivity: 1dB (3) Ultrasonic measurement Measuring range: - 7dB μ V～68 dB μ V； Resolution: 1dB; Error: ± 1dB; Sensor sensitivity: - 65dB (0dB = 1volt)/ μ Bar (effective value SPL); Center frequency of sensor: 20 ~ 50KHz; Sensor diameter: no more than 50mm; Heterodyne frequency: 38.4khz. (4) UHF sensor Detection frequency band: 300MHz ~ 1.5GHz signal transmission mode: 50 Ω coaxial cable Detection sensitivity: 1dB gain: ＞ 65dbm ● Hardware requirements Shell: with protective shell, and the protection grade shall reach or be better than IP53; Connector: earphone socket, low-voltage DC charger input, external ultrasonic sensor input; Host weight: no more than 3kg; Display screen: LED display and battery status can be displayed. ● power supply requirements Internal battery: equipped with rechargeable battery, with automatic shutdown function when the battery voltage is low; Continuous working time of battery: more than 6 hours in single channel mode and more than 3 hours in multi-channel mode; Battery charging: 220V power frequency power supply can be used for charging, and the charging time shall not be greater than 8 hours; Protection grade of battery charger: IP54. |
| Technical features |
| ● It is equipped with five kinds of sensors, namely, two ultrasonic sensors, one TEV sensor, one HFCT sensor and one UHF sensor, which are powerful and suitable for the live partial discharge test of all high-voltage primary equipment; ● Find and locate partial discharge points for large coil equipment such as large main transformer and reactor; ● Two channels, displaying waveform, dbmv value and yellow green red warning value; And three-dimensional stereogram display; ● High sampling rate and strong anti-interference ability; ● Waveform storage and uploading to USB flash disk and computer; ● The five sensors have high precision and strong anti-interference ability; |
Feidian electric energy provides more professional testing equipment and technical services for power transformer, transformer, switch, high-voltage cable, power capacitor, bushing, insulator, lightning arrester, motor and other manufacturers
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Address：Lingang section of Shanghai Pilot Free Trade Zone
Tel：13761804576
Email：zhangzaihui@126.com
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