Grading rings and capacitors are critical components in high-voltage bushings that manage electric field distribution and prevent insulation breakdown.
Grading rings (also called corona rings) are metallic rings installed at strategic points on high-voltage bushings to control and equalize electric field gradients, reducing corona discharge and preventing insulation failure. Capacitors in this context refer to capacitive grading elements embedded within bushing insulation to create uniform voltage distribution along the bushing length. Together, these components ensure reliable operation of high-voltage equipment by managing electrostatic stress.
诱因 → 失效模式 → 工程缓解
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Grading rings are external metallic rings that control surface electric fields, while capacitors are internal elements that create uniform voltage distribution through capacitive grading. Both work together to prevent insulation failure.
Visual inspections should be conducted annually, with detailed electrical testing every 3-5 years or after severe weather events. Look for corrosion, contamination, or physical damage.
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CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。
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