Relay protecting device exit relay actuating coil self-detecting module and method

Abstract

Disclosed is a relay protecting device exit relay actuating coil self-detecting module and method. The self-detecting module comprises a driving power source and a detecting power source, which are both connected with the actuating coil of an exit relay through a power source switching module; a sampling resistor, a differential amplifier, a front regulating circuit, an analog/digital converting unit and a control unit are connected between the detecting power source and the power source switching module; the actuating coil is externally connected with an exit relay actuating coil driving circuit; the control unit transmits power source switching signals and exit relay work control signals to the power source switching module and the driving circuit respectively and accordingly achieves switching of the working mode of the exit relay. The method comprises establishing a detecting module current path through the control unit, then converting current signals into impedance of the actuating coil for comparison with a preset range, and lastly, according to a comparison result, determining the fault type of the exit relay actuating coil. The relay protecting device exit relay actuating coil self-inspecting module and method can achieve intelligent dynamic detection, early warning and fault shooting on the actuating coil.

Description

Technical field [0001] The invention belongs to the technical field of relay protection devices, and in particular relates to a self-checking module and a self-checking method for an outlet relay action coil of a relay protection device. Background technique [0002] With the intelligent development of relay protection devices, the requirements for self-checking of relay protection devices are getting higher and higher, and the self-checking of the core function unit of relay protection devices is undoubtedly one of the key and difficult points. Outlet relays are the core components of relay protection devices to perform protection actions and transmit control commands. Most of them use electromagnetic relays, which have simple functions and reliable quality, but they cannot achieve their own functional detection. The current relay protection device can only support simple open circuit and short circuit detection for export relays, and cannot realize intelligent detection. Summa...

AI Technical Summary

Problems solved by technology

The export relay is the core device for the relay protection device to perform protection actions and transmit control commands. Most of them use electromagnetic relays, which have simple functions and reliable qual

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