A universal regulated power supply plug-in

Abstract

The invention discloses a universal stabilized voltage supply plug-in which comprises a power supply transformer, a rectifying circuit, a filtering circuit and a voltage stabilizing circuit all sequentially connected, wherein the rectifying circuit is a bridge-type rectifying circuit; the power supply transformer is provided with a plurality of secondary output ends; two of the secondary output ends of the power supply transformer are connected with the input end of the bridge-type rectifying circuit; after being respectively connected with the voltage stabilizing circuit, two output ends of the bridge-type rectifying circuit are used as the output ends of a power supply circuit; the rest of secondary output ends of the power supply transformer are connected with a ground wire of the power supply circuit by single-pole multi-throw switches K; filtering capacitors are respectively connected between two output ends of the bridge-type rectifying circuit and the ground wire of the power supply circuit; by the single-pole multi-throw switches, the ground wire of the power supply circuit is connected with different secondary output ends of the transformer. Voltages and currents between the output ends and the grounding end of the power supply circuit are regulated; the power demands of different microprocessor protection devices are met; the universal stabilized voltage supply plug-in solves the problem that an existing power supply has poor universality and when the power supply is damaged, no standby product is provided to replace the power supply so as to directly influence reliability of supplying power to a user.

Description

technical field [0001] The invention relates to a power board for substation protection equipment, in particular to a universal stabilized power supply plug-in. Background technique [0002] Microcomputer protection device is currently the most popular protection device for power system users. After more than ten years of inspection and operation experience, its advantages of high reliability and stable performance have been unanimously recognized and affirmed by people in the industry. However, the hardware defects of microcomputer protection often occur, especially the defect rate of the power supply part of the device is high. [0003] After statistics and conclusions, the main reasons for the damage of the microcomputer power supply are as follows: 1. The characteristics of the filter capacitor element of the 5V output deteriorate; 2. After the power supply ages, the output voltage of ±12V deviates; 3. The power supply has no output or the printing plate is burnt out; 4....

AI Technical Summary

Problems solved by technology

However, with the continuous upgrading of the power system, a large number of equipment transformations and the continuous increase in the types of power supply devices, and some earlier power supply device manufacturers have carried out substantial transformation or even "changed" their products, the improved power supply devices It is incompatible with the capacitance and voltage of the protection device. When the power supply device is damaged and used, if there is no spare replacement product, it will take several days or even dozens of days to deal with the problem of damaged power supply. At the same time, this problem also aggravates the difficulty of spare parts storage. Big

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