Partial Discharge Detector Manufacturer

Partial discharge (PD) is a localized electrical breakdown of insulation that does not completely bridge the electrodes. It is a leading indicator of insulation degradation in high-voltage equipment such as GIS, switchgear, transformers and cables. If left undetected, PD can lead to insulation failure, unplanned outages and costly repairs. Standards such as IEC 60270 define how PD is measured. Huawang Technology provides UHF, TEV, ultrasonic and HFCT sensors to detect PD early so maintenance can be planned before failure.

The four main PD detection methods are: UHF sensors that capture electromagnetic pulses from internal discharge, ideal for GIS; TEV sensors that detect surface discharge on switchgear panels; ultrasonic (AA) sensors that pick up acoustic signals; and HFCT sensors for cables and pulse current measurement. Huawang Technology manufactures all four types, including multi-functional sensors combining TEV, ultrasonic and temperature-humidity monitoring in one unit.

Sensor selection depends on the equipment type. For GIS, use UHF sensors. For switchgear and RMU panels, TEV combined with ultrasonic (AA) sensors works best. For power cables, HFCT pulse-current sensors are recommended. For comprehensive coverage, a 4-in-1 sensor integrating UHF, TEV, ultrasonic and temperature-humidity monitoring can be installed on switchgear. Huawang Technology offers application engineering support to help select and install the correct configuration.

Yes. Most Huawang Technology PD sensors support live installation. Surface sensors such as TEV and ultrasonic are non-invasive and can be mounted on energized panels, while UHF sensors can be fitted to GIS drain valves or mounting adapters. Online monitoring systems stream data continuously through LoRa, RS485, 4G or wired networks, providing early warning without interrupting power supply.

Yes. Zhuhai Huawang Technology Co., Ltd. is a manufacturer with in-house R&D, offering OEM and ODM services for PD detectors, PD sensors and IoT monitoring products. With R&D centers in Zhuhai and Xi’an, over 50 patents, 63 software copyrights and ISO 9001 certified manufacturing, we can customize product specifications, branding and software platforms for distributors and system integrators worldwide.

Surge arrester (MOA) leakage current monitoring measures the resistive and total leakage current flowing through an arrester, plus lightning strike counts. Rising resistive current indicates ageing or moisture ingress inside the arrester. Huawang Technology’s wireless leakage current sensors transmit data via LoRa to a gateway, enabling remote health assessment of arresters in substations without manual inspection.