... in electrified railway and locomotive. insulator, Polymer Post Insulator for Locomotive, locomotive insulator, connecting insulator, railway insulator, silicone insulator New generation of insulator used in electrified railway and ... distance: 1200mmlightning impulse withstand voltage: 180kVPower frequency withstand voltage: 80kV insulator, Polymer Post Insulator for Locomotive -1000mm, locomotive ...