高压电缆附件铅封监测系统

Welding Seal Monitoring SystemFor HV Cable Accessories

铅封是高压电缆附件制作的关键工序之一，它用来使附件的铜壳或尾管与电缆铝护套电气连接，同时起到密封防水作用。一旦铅封发生开裂，附件就会进水受潮，或者造成电场畸变，同时会引起接地系统不平衡，造成接地电流变大，极易引起击穿故障。采用电磁穿透效应技术监测电缆接头两端铅封状态，将电磁式传感器包裹在电缆附件铅封与金属护层中间，当铅封位置出现开裂、破损等缺陷，通过电磁矩阵传感器实时监测电磁信号强度变化，实现对电缆铅封运行状态缺陷评估、预警。Lead sealing is one of the key processes in the production of high-voltage cable accessories. It is used to electrically connect the copper shell or tail pipe of the accessory to the aluminum sheath of the cable, and also serves as a waterproof seal. Once the lead seal cracks, the accessory will be flooded and damp, or cause electric field distortion, and at the same time, it will cause imbalance in the grounding system, resulting in a larger grounding current, which can easily cause breakdown failure. The electromagnetic penetration effect technology is used to monitor the lead seal status at both ends of the cable joint. The electromagnetic sensor is wrapped between the lead seal of the cable accessory and the metal sheath. When defects such as cracks and damage occur in the lead seal position, the electromagnetic matrix sensor is used to monitor the electromagnetic signal strength in real time. Change to realize the defect assessment and early warning of the cable lead seal operation status.

系统组成

1-电磁式铅封监测传感器

2-铅封监测采集装置

3-互感取电电源

4-电缆铅封运行状态监测箱

System composition

1-Electromagnetic lead seal monitoring sensor

2-Lead seal monitoring acquisition device

3-Mutual inductance power supply

4-Cable lead seal operation status monitoring box