Then: Charles BRUSH designed and hand- built new devices for electrical connections and control. Below is an 1892 voltage controller (regulator) for a 12kW dynamo used to charge batteries.
Now: BRUSH still produce voltage regulators and excitation power controllers to meet modern utility needs. Latest versions like the PRISMIC® A30 shown here can control generators up to 1000MW. In addition to protecting the capital plant, users’ engineers use the microprocessor technology to remotely monitor and control power flows, thereby improving efficiency of operation.