When abnormal discharge occurs in substation switchgear, cable terminations, or GIS equipment, operation and maintenance personnel often encounter two problems: the inability to quickly determine the type of discharge and the difficulty in locating the discharge position. Conventional methods require power outage inspections, which affect power supply continuity and lack quantifiable data support.
The PD-2100 partial discharge detector integrates four types of sensors, covering different discharge signal characteristics: the ultra-high frequency (UHF) sensor responds to the 300MHz-1.5GHz frequency band and is suitable for internal insulation defects in GIS; the transient earth voltage (TEV) sensor detects 3MHz-100MHz signals and is used for surface discharge in switchgear; the acoustic emission (AE) sensor receives 20kHz-300kHz sound waves and can locate partial discharge points; the high-frequency current transformer (HFCT) measures pulse currents in cable grounding wires.
The device provides 0-60dB gain adjustment, supports a sampling rate of 100MS/s, and covers a measurement range of 1pC-10000pC (depending on the sensor). The built-in battery can operate continuously for 6 hours and supports Wi-Fi and USB data export. The accompanying mobile APP can display waveforms, phase spectra, and trend charts in real time, and supports cloud platform upload for remote consultation by operation and maintenance teams. The storage capacity is 16GB and can record more than 100,000 detection data entries.
During 10kV switchgear inspections, first use the TEV sensor to scan cabinet gaps, and after discovering anomalies, switch to the AE sensor for localization. For cable joint detection, HFCT is preferred, with UHF used for verification when necessary. All measurements require recording background noise, and signal amplitude should be judged according to the Q/GDW 11059.1-2013 standard. The device has a built-in library of typical discharge spectra, which can assist on-site personnel in quickly identifying floating potential, surface discharge, or corona discharge.
The PD-2100 is powered by AC 220V or a built-in lithium battery, has an IP54 protection rating, and operates at temperatures from -10℃ to 50℃. An optional external synchronization module can be used to achieve phase synchronization among multiple devices. For scenarios requiring combined offline withstand voltage and partial discharge tests, this model can accept external voltage source trigger signals and be used with ultra-low frequency or power frequency withstand voltage devices.
