The EL series insulators feature a design with numerous waves in the middle of the cylinder. This design is intended to increase the creepage distance and enhance the electrical performance. Before leaving the factory, our company conducts a withstand voltage test on each product in accordance with the national standard for withstand voltage testing. In addition, our company also carries out performance tests on the breakdown voltage of the EL series BMC insulators. This BMC busbar insulator is mainly designed for indoor use scenarios. Especially in traditional electrical cabinets, this type of insulator is widely applied.