Goldhome Achieves Dual Compliance in Mass Production Testing of 200kVA/500kV High-Voltage Partial Discharge Test Equipment Setting a New Benchmark in the Cable Testing Industry
Recently, Wuhan Goldhome Electrical Co., Ltd.'s independently developed 200kVA/500kV high-voltage partial discharge testing equipment successfully completed mass production implementation and full-condition testing validation. Under rated conditions, partial discharge levels are precisely controlled within 2 pC. Tailored for cable manufacturers with core performance and application design, it provides a replicable high-end equipment solution for high-voltage cable insulation testing.
The new product breaks through industry technical bottlenecks with its core strengths of "ultra-precise detection + high adaptability." At the core detection level, it adopts the pulse current method recommended by the International Electrotechnical Commission (IEC), equipped with a customized high-frequency pulse current transformer (HFCT). The coil structure is optimized to a non-magnetic skeleton Rogowski coil, covering a frequency band of 1MHz-100MHz with with linearity exceeding 0.2%. Combined with a triple-layer electromagnetic shielding structure and adaptive filtering algorithms, it precisely captures faint discharge signals in complex electromagnetic environments, pushing detection sensitivity to the 2pC limit-far surpassing conventional industry equipment. The device integrates an ARM-based intelligent measurement and control unit, supporting real-time generation of partial discharge phase maps and charge variation curves. It automatically identifies typical defects such as semiconductive tips and insulation scratches, establishing a defect fingerprint database to achieve an integrated "detection-identification-diagnosis" closed-loop system.
Tailored to cable manufacturers' production testing needs, the equipment achieves multi-dimensional optimization in adaptability and practicality. It supports factory testing for multiple cable types and accessories-including cross-linked polyethylene and DC submarine cables-covering combined insulation withstand voltage and partial discharge testing for cables rated 500kV and below without requiring additional auxiliary equipment. Featuring a modular integrated design, the test circuit and control unit are separated. Paired with an eddy-current-proof insulated base and mobile casters, it facilitates flexible switching between test stations in production workshops, adapting to batch testing scenarios for cables of varying lengths and specifications. The equipment incorporates multiple safety protection mechanisms, including automatic shutdown for overvoltage, overcurrent, and abnormal discharge. With an IP66 protection rating, it confidently handles complex workshop environments while balancing testing efficiency and operational safety.
As a critical tool for cable insulation quality control, the successful mass production of this equipment sets dual benchmarks for technology and application within the industry. With surging demand for high-voltage cables-particularly DC submarine cables-insulation defects remain a primary cause of operational failures. Most such failures can be detected early through partial discharge testing. With its ultra-high detection accuracy of ≤2 pC, Guodian Huamei's device enables manufacturers to precisely identify microscopic insulation defects during production, enhancing cable reliability at the source. This addresses industry pain points of insufficient accuracy and limited adaptability in partial discharge detection for high-voltage cables. Its "precision detection + batch adaptability" design philosophy provides a practical blueprint for upgrading cable testing equipment toward higher sensitivity and scenario-specific applications.
