Pluggable surge protector

Abstract

The invention discloses a pluggable surge protector, which comprises: a base and at least one pluggable module. The base includes a pressure plate and a micro switch. The pluggable module is installed on the base through the stop positioning mechanism, and the pluggable module includes: a housing, a first contact piece and a second contact piece, a non-linear protection element, a disengagement lever and an indicating part. There is an indication window on the top of the housing. The first pin of the nonlinear protection element is directly connected to the first contact piece, the second pin of the nonlinear protection element is connected to the second contact piece through a U-shaped bracket and a flexible connector, and the U-shaped bracket and the flexible connector are conductive material, the second pin is connected to it through a low melting point alloy. The upper breakaway bar is installed in the U-bracket. The indicating part is mounted on the top of the housing and can move horizontally. The lower disengagement rod is installed on the bottom of the U-shaped bracket and has a downward protrusion. The pressure plate is located at the bottom of the housing, and the micro switch is located under the housing and aligned with the pressure plate.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, more specifically, to a surge protector in the low-voltage electrical appliances. Background technique [0002] The surge protector includes a non-linear element, and the non-linear element is usually a metal oxide varistor (MOV) (hereinafter referred to as MOV). After long-term use or overload, MOV will age and generate heat. Aging or heating MOV will not only affect the performance of MOV, but also cause unexpected failure or danger. In order to prevent continuous failure of the system caused by MOV aging or overheating or even fire and other disasters, a tripping mechanism is usually provided in the surge protector, and the tripping mechanism is connected in series with the MOV to separate the MOV from the circuit when the temperature rises. , and give local and (or) remote status notification. [0003] A pluggable surge protector is disclosed in the prior art. The pluggable ...

AI Technical Summary

Problems solved by technology

This kind of pluggable surge protector has the following defects: 1) The local status indication cannot give two clearly distinguishable status indications of green / red

2) The protection level and discharge capacity of a single MOV are limited. When a higher discharge capacity is required, two or more MOVs need to be connected in parallel to complete, so that two or more of the above-mentioned tripping mechanisms need to be used. However, when the temperature rises, since two or more MOVs cannot be guaranteed to trip at the same time, one may not trip and the other may trip. When one or part of them trips, the product cannot guarantee the original leakage. Capability and protection level, there may be product overload and cause MOV to explode or burn

[0004] Another technical solution in which multiple MOVs can be tripped synchronously has been proposed in the prior art. This solution uses multiple MOVs connected in parallel and then a tripping device in series, but this solution uses conductive parts to connect the lugs and electrodes through low-temperature alloy Connected by welding, so that two solder joints are formed. The defect caused by this is that when a large impact current is impacted or the MOV is aging, one of the two solder joints may be disconnected first, while the other solder joint is not. In the case of disconnection, although the MOV has been disconnected from the line, the tripping mechanism cannot act and give a fault indication, which will lead to the risk of damage to the equipment due to not being protected by the surge protector

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