Motor protection device (and name motor protection device) of role is to motor full of protection, in motor appeared timeout started, and had flow, and owes flow, and broken phase, and blocking turned, and short-circuit, and had pressure, and owes pressure, and leakage (grounding), and three-phase not balance, and overheating, and bearing wear, and set rotor eccentric, and External fault, and calls since started, and anti-time Shi, be alarm or protection of device.