铅封是高压电缆常用的连接方式，受外部热缩套及防水带干扰的影响，常规检测方法难以对内部铅封连接状态进行检测。制备了高压电缆铅封试样并加工了相应缺陷，以模拟现场使用状况，采用交流电磁场检测技术进行了检测试验。试验结果表明，交流电磁场检测技术能够穿透保护层对铅封表面开裂缺陷进行检测，检测灵敏度及分辨力较高，但检测结果会受到探头角度的影响，检测时需考虑检测方向。

The lead sealing is a common way of connecting high-voltage cables. Due to the interference of external heat-shrinkable sleeves and waterproof tapes, conventional inspection methods are difficult to inspect the internal lead seal connection status. Simulate onsite use conditions and process defects to prepare high-voltage cable lead seal samples. Carry out inspection experiments based on alternating current field measurement(ACFM)technology at the same time. Testing results shows that ACFM can penetrate the protective layer to detect the surface cracking defects of the lead seal. The detection sensitivity and resolution are better than other methods. The detection direction should be considered when detecting because the detection result will be affected by the angle of the probe.