CN204834535U - Full electric energy control and protection switch - Google Patents

Abstract

The utility model discloses a full electric energy control and protection switch. It includes a pair of fixedly installed static contacts and moving contacts, and also includes an arc extinguishing chamber installed outside the contacts of the moving contacts and the static contacts. The head is installed on a moving contact bracket, and there is a permanent magnet operating mechanism under the moving contact bracket. The permanent magnet operating mechanism includes a moving iron core fixedly connected to the bottom of the moving contact bracket, and an opening and closing switch wound around the moving iron core. The coil and the permanent magnet arranged under the moving iron core are fixedly installed on a base, and a compression spring is arranged between the moving contact bracket and the base. After the above-mentioned structure is adopted, the extremely high breaking capacity of the circuit breaker and the powerful and comprehensive protection performance for the circuit and the simple structure, high reliability, long mechanical life and good consistency of the action time of the contactor are skillfully combined. The characteristics are integrated, so that the product has the dual characteristics and advantages of controlling and protecting electrical appliances.

Description

Full power control and protection switch

technical field

The utility model relates to a low-voltage electrical appliance protection control switch, in particular to a full electric energy control and protection switch, which belongs to the technical field of electric control devices.

Background technique

In the existing electrical control and electrical protection fields, circuit breakers and contactors are mainly used to adapt to different applications and usage requirements. With the improvement of control requirements, there is an urgent need for an electrical control and contactor that can perform some comprehensive protection and control. Electrical protection equipment, however, traditional circuit breakers have been widely used in power systems due to their extremely high breaking capacity and powerful and comprehensive protection performance for circuits. The crankshaft connecting rod reclosing mechanism) reclosing mechanical life is 0.5-0.8 million times, electrical life is 0.3 million times, there are many faults, poor reliability, and there is a dispersion of ± 70ms, which cannot be frequently opened and closed; and as a control The contactor, because of its simple structure, high reliability, mechanical life of hundreds of thousands of times or more, can achieve frequent breaking, only ±1ms discrete, good consistency of action time and other characteristics, but due to its poor breaking capacity, Due to the shortcomings of slow breaking speed, it is impossible to effectively protect the power grid and electrical equipment, so it is widely used in the control of industrial equipment at the lower end of the protective electrical circuit breaker and the leakage control switch of the rural power grid. Therefore, circuit breakers and contactors have been used at home and abroad so far To achieve different use requirements and occasions, it is difficult to meet the existing control requirements.

Contents of the invention

The technical problem to be solved by the utility model is to provide a full electric energy control and protection switch with dual characteristics of control and protection electrical appliances, good arc extinguishing ability, strong breaking ability, high reliability and long service life .

In order to solve the above-mentioned technical problems, the full electric energy control and protection switch of the present invention includes a pair of fixedly installed static contacts and a moving contact matched with the two static contacts, and also includes contacts installed on the moving contacts and The arc extinguishing chamber outside the contact of the static contact, the arc extinguishing grid for arc extinguishing is arranged in the arc extinguishing chamber, and the moving contact is installed in a space between the two static contacts and can be placed between the two static contacts. On the moving contact bracket, there is a permanent magnet operating mechanism under the moving contact bracket for controlling the up and down movement of the moving contact bracket. The permanent magnet operating mechanism includes a moving iron core fixedly connected to the bottom of the moving contact bracket, wound The opening and closing coil outside the iron core and the permanent magnet arranged under the moving iron core, the permanent magnet is fixedly installed on a base, and a compression spring is arranged between the moving contact bracket and the base.

The opening and closing coils are set as two independent coils wound on the moving iron core at the same time, and the two independent coils are respectively connected to the opening and closing circuits.

The moving iron core is installed on a coil support with an inner circular hole, and the cross-sectional shape of the moving iron core is set as a cylindrical structure formed by cutting two sides of a cylinder.

After adopting the above-mentioned structure, due to the set arc extinguishing unit, opening and closing unit and permanent magnet operating mechanism, the extremely high breaking capacity of the circuit breaker and the powerful and comprehensive protection performance of the circuit and the contactor’s Simple structure, high reliability, long mechanical life, good consistency of action time and other characteristics in one, so that the overall structure is simple, strong breaking capacity, good arc extinguishing ability, high reliability, good consistency, and can be controlled frequently. There is no power loss in the closed state, the mechanical life of reclosing is 200,000 times, the electrical life is 10,000 times, and the discreteness is ±3ms; the independent coil is set at the same time, and the independent coil has different opening and closing circuits, which improves the quickness of breaking and breaking. The cross-sectional shape of the moving iron core is set as a cylindrical structure formed by cutting two sides of the cylinder. The gap formed between the moving iron core and the inner circular hole of the coil support reduces resistance and further improves the opening and closing speed. As a result, all the shortcomings of the traditional electromagnetic contactor, such as separation, slow closing speed, energy consumption and environmental protection, etc. are completely eliminated, and the protection ability of the circuit and equipment reaches or exceeds the characteristics of the circuit breaker, so that the product has control The dual characteristics and advantages of protection appliances make the control and protection of power distribution more concise, save a lot of equipment investment for users, and can replace various appliances in low-voltage power distribution and control systems, reducing volume and cost. Improve reliability, save a lot of non-ferrous metals and equipment materials and precious electric energy.

Description of drawings

Fig. 1 is the structure diagram of the utility model full electric energy control and protection switch;

Fig. 2 is a structural schematic diagram of the installed state of the moving iron core in the utility model.

Detailed ways

The full electric energy control and protection switch of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

As shown in the figure, the full electric energy control and protection switch of the present invention includes a pair of fixedly installed static contacts 1 and a moving contact 2 matched with the two static contacts, and also includes contacts installed on the moving contacts and the arc extinguishing chamber 3 outside the contact of the static contact, the arc extinguishing grid 4 for arc extinguishing is arranged in the arc extinguishing chamber 3, and the moving contact 2 is installed between the two static contacts and can be positioned between the two On the moving contact bracket 5 that moves between the two static contacts, there is a permanent magnet operating mechanism 6 for controlling the moving contact bracket up and down below the moving contact bracket 5, and the permanent magnet operating mechanism 6 includes a fixed connection on the moving contact. The moving iron core 7 at the bottom of the bracket 5, the opening and closing coil 8 wound outside the moving iron core 7, and the permanent magnet 8 arranged below the moving iron core 7, the permanent magnet 8 is fixedly installed on a base 9, and the moving contact bracket A compression spring 10 is arranged between 5 and base 9 .

Further, the opening and closing coil 8 is set as two independent coils wound on the moving iron core at the same time. Brake task, increase the power of the pull-in coil, by changing the wire diameter of the pull-in coil, increase the pull-in power appropriately, and reduce the charging time of the capacitor, so that it can respond to the control circuit at an extremely fast speed when testing the limit and short-circuit breaking capacity The control command completes the entire switching process, effectively reduces the ablation of the contacts under extreme conditions, and effectively overcomes the impact on the entire control circuit and The influence of the opening coil can reach several mS at most.

Furthermore, the moving iron core 7 is installed on a coil support 11 with an inner circular hole, the cross-sectional shape of the moving iron core 7 is set to a column structure formed by cutting two sides of a cylinder, and the electromagnetic moving iron core is changed The structural shape completely overcomes the airflow compression resistance caused by the high-speed movement of the moving core, and can effectively increase the speed of pull-in and break-off by 3mS after testing.

Claims (3)

1. a full controlling electric energy and protection switch, it is characterized in that: the moving contact (2) comprising a pair hard-wired fixed contact (1) and coordinate with two fixed contacts, also comprise the arc control device (3) be arranged on outside the contact of moving contact and the contact of fixed contact, the arc extinguishing grid pieces (4) for arc extinguishing is provided with in arc control device (3), described moving contact (2) is arranged on one between two fixed contacts and can on the moving contact rack (5) of action between two fixed contacts, there is the permanent-magnet operating mechanism (6) for controlling moving contact rack knee-action the below of described moving contact rack (5), described permanent-magnet operating mechanism (6) comprises the dynamic iron core (7) being fixedly connected on moving contact rack (5) bottom, be wrapped in dynamic iron core (7) divide-shut brake coil (8) outward and the permanent magnet (8) be arranged on below dynamic iron core (7), permanent magnet (8) is fixedly mounted on a base (9), a Compress Spring (10) is provided with between described moving contact rack (5) and base (9).

2. according to full controlling electric energy according to claim 1 and protection switch, it is characterized in that: described divide-shut brake coil (8) is set to two absolute coils be simultaneously wrapped on dynamic iron core, two absolute coil connecting dividing lock loops respectively.

3. according to full controlling electric energy according to claim 1 and protection switch; it is characterized in that: described dynamic iron core (7) is arranged on one and has on the coil brace (11) of interior circular hole, the cross sectional shape of dynamic iron core (7) is set to excise by cylinder the column structure that two sides are formed.