Study on the Interface Resistivity Between Silicone Rubber and Fiber Reinforced Plastic in Composite Insulators

The interface between silicone rubber and fiber reinforced plastic (FRP) is an internal macroscopic interface in composite insulators. Generally speaking, the interface is the weak point in the whole composite insulation system. Some interfacial defects, such as interfacial adhesion loss, moisture ingress, impurities at the interface, can lead to a significant decline of insulation performance. It should be noted that, the detection method for interface between silicone rubber and FRP is relatively scanty. In this research, a novel electrode system is designed and manufactured to evaluate the interface resistivity between silicone rubber and FRP. The electrode system includes a high voltage electrode, a measuring electrode and two shield electrodes, in which the high voltage electrode and…