Switchgear assembly including a transparent viewing port for visual observation of contacts

摘要

A switchgear assembly includes a tank housing encapsulating switching contacts which are viewable through a transparent viewing port after illumination of the contacts. A reflective optical device for observing the position of the switching contacts is used to view the contacts at a safe distance outside of the tank housing through the transparent viewing port. An illuminating device is used to illuminate the switching contacts by directing the light from the illuminating device on the switch contacts.