Based on emergency operating requirements—such as the emergency actuation of hydraulic‑turbine governor servomotors, or the emergency closing of chemical‑process and hydropower inlet valves and circuit breakers when power is lost—the accumulator system serves as the system’s emergency power source. As an emergency power source, its fundamental operational characteristics must ensure that the energy stored in the accumulator remains under monitored, guaranteed‑operation conditions. Particularly in high‑pressure applications—e.g., when system pressure is ≥9 MPa—a piston‑type accumulator system equipped with an energy‑monitoring device is the required choice.
