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Time-delay action electromagnet and circuit breaker using same

A time-delayed action and electromagnet technology, applied in the direction of protection switch operation/release mechanism, etc., can solve the problems of high cost, poor stability, unfavorable product promotion, etc., and achieve the effect of protecting the main circuit or load and ensuring performance

Pending Publication Date: 2020-12-04
XIAMEN TAIHANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core technology of the SSD is a shunt option composed of a discharge gap connected in parallel at both ends of the electromagnet coil. Since the discharge gap uses AC zero crossing to extinguish the arc, it cannot be used in a DC power supply system.
In addition, the high cost of the discharge gap makes it difficult for SSD to be widely used as MCB.
[0004] Most of the existing alternatives use parallel lines with individual pulse current conduction branches, but because the pulse current conduction equipment in most schemes has high cost or poor stability, it is also not conducive to the promotion of products

Method used

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  • Time-delay action electromagnet and circuit breaker using same
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  • Time-delay action electromagnet and circuit breaker using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This embodiment discloses an electromagnet, which is used in low-voltage circuit protection equipment, and is mainly capable of stably conducting pulsed lightning current and acting when a power frequency breaking current occurs.

[0057] Specifically, it includes three parts, which are electromagnet assembly 5, delayer 4 and transformer assembly A from top to bottom.

[0058] The transformer component A is connected in series with the electromagnet component 5 to form a loop, and the delayer 4 is connected in parallel with the transformer component A.

[0059] The transformer assembly A has at least two sets of coils, both of which are wound on the same iron core, and one set of coils is connected in series with the external main circuit, and the other set of coils is connected in series with the coils of the electromagnet assembly 5 .

[0060] When the external main circuit reaches the other end through the lower coil of the transformer assembly A, the secondary curre...

Embodiment 2

[0063] This embodiment also discloses an electromagnet structure, which is mainly used in backup protectors, and realizes stable discharge of pulse lightning current by cooperating with surge protectors.

[0064] Specifically, as figure 1 and Figure 4 As shown, the specific structure of the electromagnet is shown in the figure, including the upper electromagnet assembly 5.

[0065] The electromagnet assembly 5 is a common structural design, including a rectangular frame body 5.1, and the left side of the rectangular frame body 5.1 is provided with movable parts, and the internal structure can be installed by disassembly.

[0066] The interior is a cylindrical electromagnet coil 5.4 structure, which is wound on the iron core. The left side is the static iron core 5.3, and the right side is the moving iron core 5.2. 5.1 Under the restriction, it can only reciprocate along its axis direction.

[0067] Below the electromagnet assembly 5 is a delayer 4 with a capacitive chargin...

Embodiment 3

[0076] This embodiment also discloses a time-delay action electromagnet, which has an electromagnet assembly 5, and also includes a transformer assembly A connected to the main circuit, and the transformer assembly A is connected to the electromagnet assembly 5 through the delayer 4 provided. . Among them, the electromagnet assembly 5 has an action part, which can act to push the external mechanism to produce a corresponding action after receiving a specific current, so as to control the main circuit or the load equipment connected to the main circuit, thereby achieving the effect of automatic start.

[0077] Transformer component A mainly plays the role of current transformation and electrical isolation, and at the same time, it originally adopts the same fixed iron core structure so that it has the characteristic of magnetic saturation. Specifically, it mainly utilizes the characteristic that the magnetic flux passed by the magnetically conductive material of its iron core c...

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Abstract

The invention belongs to the technical field of circuit breakers, and discloses a time-delay action electromagnet and a circuit breaker applying the same. The electromagnet is provided with an electromagnet assembly, a mutual inductor assembly connected with a main circuit is also arranged, and the mutual inductor assembly is connected with the electromagnet assembly through an arranged delayer. The invention further discloses a circuit breaker adopting the time-delay action electromagnet. The main circuit is a circuit connected into the circuit breaker, and the electromagnet assembly is linked with a tripping mechanism arranged in the circuit breaker. The electromagnet assembly is provided with an action part, and can act to push an external mechanism to generate corresponding action after receiving specific current, so that a main circuit or load equipment connected with the main circuit is controlled, and an automatic starting effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a time-delay action electromagnet driven by a mutual inductance current. Background technique [0002] The power supply SPD is equipped with a backup overcurrent protection device. The purpose is that when the SPD has a metallic short circuit fault, the overcurrent protection device can quickly cut off the circuit to prevent the protection switch from tripping and causing large-scale power outages in the power system. Another function is to prevent the abnormal voltage rise of the power supply system from causing the SPD to start and flow into the power frequency short-circuit current to catch fire. [0003] At present, an SSD (miniature circuit breaker capable of passing pulse current and blocking power frequency short-circuit current) is used, including an operating wrench, electromagnet, tripping mechanism, moving contact and static contact, which solves t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/44H01H71/24
CPCH01H71/24H01H71/44
Inventor 李欣
Owner XIAMEN TAIHANG TECH