An overload protection device for distribution transformers of low-voltage distribution lines

Abstract

The invention relates to the technical field of power equipment, and discloses an overload protection device for distribution transformers of low-voltage distribution lines, including a transformer, the top of the transformer is fixedly connected with a controller, and the inside of the controller is fixedly connected with a breaker The control hook is movably connected inside the breaker, the control spring is connected to the outer socket of the control hook, the connecting rod is fixedly connected to the outside of the control hook, and the first connecting rod is fixedly connected to the inside of the breaker A contact block and a second contact block, the outside of the first contact block and the second contact block are hingedly connected with a contact pressure plate, the bottom of the contact pressure plate is fixedly connected with a pressure plate spring, and the outside of the first contact block is movably connected The loaded electromagnet is used in conjunction with the control hook, the control spring, the connecting rod, the first contact block and the second contact block, so as to ensure the smooth and timely disconnection of the main circuit, avoid faults, and effectively avoid circuit burnout and equipment damage .

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to an overload protection device for distribution transformers of low-voltage distribution lines. Background technique [0002] Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components are primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic Saturated transformer), etc., in the process of installing transformers on the line, in order to protect the safety of the equipment and the line, an overload protection device is usually installed to prevent the main power line from being overheated and damaged due to overload. [0003] Existing transformer overload protection devices are usually composed of fuses or voltage transformers. However, this method is often prone to component failu...

AI Technical Summary

Problems solved by technology

[0003] Existing transformer overload protection devices are usually composed of fuses or voltage transformers. However, this method is often prone to component failures, unable to complete protection, and often does not respond in time, resulting in damage to internal components due to excessive temperature. Cut off the circuit, the fuse can not play a protective role, and the fuse protection device needs to replace the fuse frequently, the operation is very troublesome, waste metal materials, and the existing overload protection device often has a single function and cannot be timely for different situations. protection, which can easily lead to equipment damage and limit the scope of use of the equipment

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