Calibration instrument of mechanical overspeed protection device of vertical hydraulic electric generating set

The utility model provides a calibration instrument of a mechanical overspeed protection device of a vertical hydraulic electric generating set. The calibration instrument comprises a rotating device, a control device and a power supply device, wherein the rotating device is connected with the mechanical overspeed protection device, the control device is used for controlling the rotating device to rotate, the power supply device is used for supplying power to the control device, the control device comprises a controller and a frequency conversion control device which is connected with the controller, and the frequency conversion control device outputs alternating current to an analog rotating device. According to the calibration instrument, the small frequency conversion control device is used for driving a motor to rotate to drive an overspeed device to rotate, the rotating speed can be controlled accurately, the speed can be accelerated in different speed acceleration rate, and various conditions of practic