2results about How to "High protection sensitivity" patented technology

The application discloses a kind of alarm shutdown devices of bucket lifting skin bucket off, it is related to material conveying equipment technical field, including hoist body, the hoist body includes base shell, the upper surface of the base shell is fixedly provided with vertical support shell, the top of the vertical support shell is fixedly provided with top cover shell, drive shaft rod and driven shaft rod are respectively rotationally arranged between the front and rear inner walls of the base shell and top cover shell.The application is provided with alarm monitoring mechanism outside the hoist, adopts inductive proximity switch non-contact detection hopper running track, and the interval and on-off state of real-time determination signal are cooperated with the built-in timer of control unit, can identify abnormality in the first time of hopper off, conveying belt slip, off, when fault occurs, control unit triggers sound-light alarm and driving motor power-off simultaneously, quickly prevent equipment from continuing to operate, avoid hopper off impact shell, conveying belt tear and other accidents, greatly improve equipment operation safety.

The application discloses a new energy box-type substation self-adaptive over-current protection setting method, and relates to the technical field of relay protection of power systems, and the method comprises the steps of establishing a multi-channel communication link with each new energy converter; collecting the running state and real-time apparent power through each communication interface polling; summarizing the total real-time apparent power and correcting the line loss; and generating the over-current protection setting value according to the corrected total real-time apparent power and the measured apparent power on the low-voltage side. The technical scheme of the application combines multi-channel collection, power summarization and correction, and self-adaptive setting, so that the protection threshold dynamically matches the actual output, the fault protection sensitivity under the low-output working condition is significantly improved, the over-current protection response capability and action reliability are improved, and the safe and stable operation of the transformer is ensured.