Trans-Rupter II^® Transformer Protector

Construction

• Three-phase tripping by electrically linked pole-units. Trans-Rupter II provides simultaneity of less than 1/4 cycle. There’s no mechanical linkage to adjust or maintain.
• Resettable pole-units. Unlike power fuses, Trans-Rupter II simply needs to be manually closed and charged after an operation.
• Hermetically sealed pole units. SF₆-gas-filled pole units are filled to full pressure at the factory, then permanently sealed. Field filling is never needed.
• Single-gap SF₆ puffer-type interrupters provide a 3-cycle interrupting time and maintain dielectric ratings when open.
• Shatterproof composite-polymer silicone insulation. Stands up to the most severe environment. Unique skirt arrangement on 115-kV and 138-kV pole-units provides enhanced dielectric performance.
• Maintenance-free operating mechanism. Each Trans-Rupter II pole-unit includes its own operating mechanism, sealed in SF₆ for excellent protection from the environment.