The Gemini 4 is part of the Gemini RTU platform, providing advanced monitoring and control for medium voltage switchgear. Switch control is achieved locally with the HMI module (common to the Gemini RTU family), via hard-wired inputs, or remotely over a communication link. The Gemini 4 offers an innovative systems engineered approach to smart grid solutions.

The Gemini 4 range comprises small composite DIN rail sub-assemblies providing the optimum suitability and footprint for controlling overhead and ground mount switchgear. The Gemini 4 RTU comprises up to seven factory fitted sub-assemblies which can control up to seven switches. This can be expanded up to 28 switch control with the addition of Gemini 4 Expansion Units. Additional options include comprehensive measurements, fault detection and automatic control functions.