According to GB/T 7354-2018 "High-voltage test techniques - Partial discharge measurements", the pulse resolution time and bandwidth of a partial discharge detector directly affect the accuracy of discharge quantity evaluation. The JFD-6500 partial discharge detector is designed for field and laboratory scenarios for technical engineers. The following sections elaborate on key application points.
While GIS, switchgear, transformers and other equipment are in operation, the detector collects partial discharge signals through high-frequency current transformers (detection frequency band 10kHz–30MHz) or ultrasonic sensors. The threshold adjustment range is 3–57dB, and the maximum pulse period is 655, making it convenient to record discharge trends and locate abnormal points without dismantling equipment.
For 10kV–35kV XLPE cable terminations and joints, the device can be used with the pulse current method to measure discharge inception voltage and discharge quantity. The detection frequency band covers 10kHz–30MHz, which can effectively avoid on-site communication and switching operation interference, and output spectra for engineers to compare with historical data.
When performing partial discharge measurement synchronized with voltage withstand tests at the manufacturer or installation site, the JFD-6500 supports external synchronization and internal synchronization triggering. The data acquisition dynamic range reaches 120dB, the linearity error is ≤±10%, and the sampling rate is selectable from 100MS/s to 2GS/s, meeting the needs for analyzing discharge pulse waveform characteristics.
The detector can perform multiple measurements at the same measuring point and record pulse amplitude and phase distribution, helping technical engineers determine the discharge type (such as internal voids, surface discharge, floating potential) and degree of development, providing a reference basis for maintenance planning.
Detection frequency band: 10kHz–30MHz (high-frequency current transformer); threshold adjustment range: 3–57dB; maximum pulse/period: 655; sampling rate: 100MS/s–2GS/s; sampling accuracy: 8Bit/12Bit/14Bit/16Bit optional; dynamic range: 120dB; linearity error: ≤±10%.
