Single-phase self-recovery type overvoltage/undervoltage protector

Abstract

The invention discloses a single-phase self-recovery type overvoltage/undervoltage protector which comprises the components of an upper cover, a base, an N-pole assembly, a relay assembly, a control circuit board, and two sets of wire inlet/outlet terminals. The upper cover is correspondingly connected with the base. The control circuit board, the relay assembly and the N-pole assembly are mounted on the base and are accommodated in a space which is between the upper cover and the base. One set of wire inlet/outlet terminal is connected with the N-pole assembly, and the other set of wire inlet/outlet terminals is connected with the relay pin of the relay assembly. The base is internally provided with a mounting part for mounting the relay. In the mounting part, a position between two relay pins which correspond with the relay assembly is provided with a retaining wall which is used for increasing a creepage distance between the two relay pins. According to the single-phase self-recovery type overvoltage/undervoltage protector, through improving the structure of the base, the creepage distance between the two relay pins can be increased. A hidden trouble of incapability of switching off a main line is eliminated on condition that main circuit switching-off is required. Furthermore an effect of stably supporting the relay assembly is realized.

Description

technical field [0001] The invention relates to the technical field of electrical appliances, in particular to a single-phase self-recovery overvoltage and undervoltage protector. Background technique [0002] The self-recovery overvoltage and undervoltage protector is a device that can automatically disconnect when the overvoltage and undervoltage in the line exceed the specified value, and can automatically detect the line voltage, and can automatically close when the line voltage returns to normal. It is mainly used in the distribution lines of households and shopping malls as overvoltage, undervoltage, phase failure, and zero line protection. [0003] The control circuit of the existing self-recovery overvoltage and undervoltage protector adopts a high-speed micro-low power consumption processor as the core and a magnetic latching relay as the main circuit. Cut off the circuit quickly and safely under the impact to avoid accidents caused by abnormal voltage being sent t...

AI Technical Summary

Problems solved by technology

The relay component of this single-phase self-recovery overvoltage and undervoltage protector is usually installed on the base. Since the two relay pins of the relay component are used to connect the main line, there is a creepage between the two relay pins. The hidden danger that the main line needs to be disconnected but cannot be disconnected due to insufficient electrical distance

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