Residual current mutual inductor and assembling technology thereof

Abstract

The invention provides a residual current mutual inductor which comprises an upper half ring (1) and a lower half ring (2), wherein the left end of the upper half ring (1) and the left end of the lower half ring (2) are hinged through a hinge pin (3); the right end of the upper half ring (1) and the right end of the lower half ring (2) are connected through a hasp (4); and an upper winding group (105) and a lower winding group (106) are mutually connected. The residual current mutual inductor has the advantages of being convenient to install and use, good in product performance and good in measurement balance.

Description

technical field [0001] The invention relates to a residual current transformer and an assembly process thereof, belonging to the technical field of transformers. Background technique [0002] At present, the split-type residual current transformer dedicated to intelligent power consumption in the residual current transformer is also called the residual current sensor for fire monitoring. Its main function is to monitor, control and manage the circuit by sensing the residual current of the electrical circuit. Whether it is running normally, and send an alarm through the equipment to notify the operation and maintenance personnel in time, deal with abnormalities or faults, eliminate electrical fire hazards, and protect people's lives and property safety. [0003] During the implementation and use, it was found that the conventional residual current transformer has the following disadvantages: ①The open-close structure is tightened by screws, which leads to cumbersome installat...

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Problems solved by technology

[0003] During the implementation and use, it was found that the conventional residual current transformer has the following disadvantages: ①The open-close structure is tightened by screws, which leads to cumbersome installation; ②The high and low temperature characteristics of the conventional residual current transformer cannot meet the requirements. The requirements are very strict, and its high and low temperature requirements are between -40°C and 75°C. Conventional residual current transformers are encapsulated with epoxy. In the environment, due to the inconsistency of the shrinkage rate of the epoxy and the iron core, the iron core is subjected to greater stress, thereby reducing its performance, and finally leading to a decline in the performance of the transformer; ③The conventional split residual current transformer is connected by screws, so the two Coils cannot be wound between the two halves at the same time, only one-sided winding can be used, resulting in poor balance characteristics

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