Trans-Rupter II^® Transformer Protector

How It Works

Rotate the charging tool handle counterclockwise to close and charge a pole-unit.

Tripping

On Model EX, the pole-units are electrically tripped by a user-furnished relay. On Model SE, the pole-units are electrically tripped by the self-powered overcurrent protection system.

Closing

An easy-to-use manual tool is included for closing and charging each pole-unit. Simply hook the tool on the operating shaft and crank counterclockwise to close the interrupter, then clockwise to reset the mechanism. The tool is captive during the charging process. It can’t be removed unless the pole-unit is fully closed and charged.

A source-side, three-pole, group-operated disconnect switch is required to provide visible air-gap isolation after the interrupters have been tripped, and to pick up transformer magnetizing inrush current after pole-units have been reset.