Shielding Effectiveness Testing Of New Energy High-Voltage And Low-Voltage Shielded Cables

In complex electromagnetic environments-such as high-frequency electric fields, low-frequency magnetic fields, or strong electromagnetic pulses-uninspected shielded cables may experience a sudden drop in shielding effectiveness. When the shielding layer's performance does not meet the required standards, external interference signals can be conducted through the cable into the core circuitry, leading to faults such as amplifier self-oscillation or data transmission errors. To address this, GRGTEST has developed a one-stop testing solution for shielding effectiveness, which proactively mitigates electromagnetic hazards along the cable's conductive path, ensuring the safe and stable operation of automotive and in-vehicle electronic systems.

In complex electronic systems-such as high-voltage wiring harnesses for new energy vehicles or high-speed signal and communication environments-improper interconnection shielding design is a primary contributor to non-compliance with electromagnetic compatibility (EMC) requirements at high frequencies. When cable shielding fails, interference signals can propagate through the outer layer or via space; however, relying solely on visual inspection or impedance testing is often insufficient to identify such underlying issues. Shielding effectiveness testing enables precise detection of hidden defects-such as damaged shielding layers, inadequate braiding density, or poor termination-thereby mitigating potential subsequent failure risks (e.g., radiation leakage or abnormal VSWR) at the source and proactively addressing system-level electromagnetic interference risks.

To meet specialized testing requirements for high-voltage shielded cables, low-voltage shielded cables, shielded materials, and other applications, the GRGTEST Electromagnetic Safety Engineering Research Institute has developed a one-stop technical service solution encompassing customized fixture design, shielding effectiveness verification, and data analysis – comprehensively covering mainstream domestic and international standards such as the IEC 62153 series and GB/T 37133. Leveraging its full suite of testing capabilities – from customized fixture design to closed-loop data management – the institute helps enterprises quickly identify electromagnetic shielding defects and shorten product validation cycles, thereby empowering high-quality development across industries including intelligent connected new energy vehicles, aviation, humanoid robotics, and high-frequency cables for telecommunications.

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Scope of Application and Object-Oriented Design

GRGTEST's one-stop shielding effectiveness testing solution is widely applicable to complete-system manufacturers, component suppliers, research and development institutions, and testing and certification agencies. Its testing scope encompasses high-voltage shielded cables, low-voltage shielded cables, and shielding materials. The solution provides end-to-end testing services-from R&D validation to mass-production quality control-helping enterprises enhance product reliability, shorten development cycles, reduce testing costs, and accelerate the commercialization of shielded cable technologies.

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One-stop testing capabilities – Comprehensive coverage across multiple standards

The facility possesses shielding effectiveness testing capabilities compliant with international, domestic, industry, and enterprise-specific standards, including IEC62153 series, GB/T 37133-2025, CASE 189-2021, and GB/T 30142-2013.

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Service Advantages

● High manufacturer recognition: The company has been accredited by nearly 40 automotive OEMs and has obtained electromagnetic compatibility (EMC) certifications from numerous automakers, including domestic independent brands and new automotive startups.

● Wide range of test capabilities: Featuring a comprehensive set of testing methods, this system enables efficient performance of shielding effectiveness tests across multiple product categories, including high-voltage shielded cables, low-voltage shielded cables, and shielding materials.

● Extensive project experience: We have successfully completed numerous tests under both domestic and international mainstream standards-including the IEC62153 series and the GB series-as well as specifications from leading automotive manufacturers, thereby accumulating a rich portfolio of real-world test cases.

● Professional Technical Team: GRGTEST's EMI shielding technology team possesses extensive experience and mature capabilities in project implementation and management, enabling the provision of customized services-including design and development, test analysis, and technical consulting.

GRGTEST Shielding Effectiveness Laboratory