The EMAX AC-1186 is an air circuit breaker designed for use in medium voltage electrical systems. It has a rated voltage of 12kV and can handle currents up to 4,000A. It is suitable for use in switchboards, motor control centers and distribution systems. The AC-1186 features a low-level voltage control system, arc-quenching anti-pumping protection, and a built-in electronic trip system. The trip can be triggered locally or remotely, and can detect over-currents, short circuits, and other faults. The AC-1186 also has an adjustable instantaneous trip and adjustable short-time delay functions. Additionally, it has two distinct mechanical latching systems for safe and reliable operation.