Error! You must javascript enabled to use this form. Please enable Javascript in your browser. Ring Main Unit Market – Key Players Overview 2025 RMU are used by delivery transformers to measure, meter, and provide uninterrupted power supply and are vital for ensuring consistency of a grid system. View full press release Your Name: Your Email: Subject: Question: We respects your privacy, the information you entered above will not be used to send unsolicited email, and will not be rented or sold to a 3rd party. Your contact information will be shared with the recipient of this message - Privacy Policy Send