The EATON Power-Sure 700 reduces equipment downtime through constant voltage regulation. It is the ideal solution for equipment or facilities experiencing brownouts and voltage regulation problems. The unique design of the Power-Sure 700 offers a high in-rush current, rapid response and operating advantages over other manufacturers. The appropriate transformer tap is automatically activated through a silicon controlled rectifier (SCR), maintaining a tightly regulated output voltage. Tap changes are initiated within one electrical cycle switching at zero current crossing to ensure a minimum amount of noise during tap transitions. Seven taps per phase are used for optimal voltage regulation. Also, the Power-Sure 700 is a low output impedance, shielded isolation transformer. As a result of the low impedance, load changes do not affect other equipment connecting the system. The Power-Sure 700's unique design ensures high efficiency at 97% and 1000% in rush capability. It is equipped with a thermal magnetic breaker that allows for proper system coordination to prevent nuisance trips. The Power-Sure 700 provides the triple function of isolation, noise attenuation and voltage regulation. The power transformer supplies the first two functions. The third function, voltage regulation, is supplied by the SCRs connected to taps on the power transformer. This sequential tap changing design eliminates voltage "overshoot" from typical electronic voltage regulators, providing a seamless transition between the required power transformer taps.