Shunt release capable of detecting abnormal power state

Abstract

The invention discloses a shunt release capable of detecting abnormal power state, which comprises a shell, and a power-off protection unit and a control circuit positioned in the shell, wherein the power-off protection unit is an electromagnet executing the release action; the control circuit comprises a power line sampling unit, a power supply unit and a state processing unit; the power line sampling unit is used for acquiring semaphore representing the power state of the release from the power line on which the release is arranged; the power supply unit acquires a real-time voltage from the power line and converts the real-time voltage to a stable voltage for supplying power; and the state processing unit sets a reference voltage, and generates a trigger signal to the power-off protection unit when the voltage of the semaphore is higher than the reference voltage, and the power-off protection unit generates the release action.

Description

technical field [0001] The present invention relates to an internal circuit of a release, in particular to a release applied to the release, according to the state of the release set on the power line, to take corresponding protection actions in an abnormal state circuit structure. Background technique [0002] For the power department, the switch and circuit breaker equipment is an indispensable equipment for electricity safety and line switching. The existing shunt release equipped with the circuit breaker, such as the leakage protection switch, is also called the air switch. The shunt release generally includes a casing, and a tripping mechanism composed of a coil and an armature, a mutual induction coil, a control circuit, and a terminal are arranged in the casing. The mutual induction coil is set on the phase line and the neutral line. When the current on the phase line and the neutral line changes, the mutual induction coil will generate a current, which is input into...

AI Technical Summary

Problems solved by technology

But the existing overcurrent protection tripper still has defects: at first the staff must arrive at the scene to cut off the power line where the shunt tripper is located; It only works when the current between the phase lines is unbalanced

However, when encountering other abnormal situations, it is necessary to disconnect the air switch in time, but it cannot be realized. What needs to be explained is that the power abnormality generally includes not only current imbalance abnormality, but also: overvoltage and overload, so the current release Often only circuit protection can be performed on the imbalance, which is difficult to meet people's needs

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