A three-phase impedance system integration device

Abstract

The utility model discloses a three -phase impedance system integrated device belongs to low voltage electrical apparatus technical field, including impedance device shell, install in the resistance adjusting subassembly of impedance device shell, inductance adjustment module and install on the power input port of impedance device shell, 30KA test article end interface and 50KA test article end interface still include pneumatic switch subassembly. Through setting impedance device shell, resistance adjusting subassembly, inductance adjustment module, integrate 50KA with 30KA impedance in the same equipment, form impedance integrated structure, unlike traditional multiple impedance series connection mode, make that test circuit length reduces, and line loss reduces, realize material, space and multiple savings of capital, in addition adopt pneumatic switch subassembly 3 to replace manual regulation, and the regulation time shortens the time of making efficiency promotion, avoid artificial misoperation and equipment damage risk to can promote test security and reliability.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a three-phase impedance system integrated device. Background Technology

[0002] Energy storage-type impulse short-circuit test devices are mainly used to verify the withstand capability and reliability of electrical equipment (such as circuit breakers, transformers, and cables) under short-circuit current impulses. Their core principle is to pre-store electrical energy and release it within a very short time, generating a high-amplitude, short-duration impulse current to simulate real short-circuit conditions. Digitalization and intelligentization are the development trends, and a large target short-circuit current range is a key parameter of their testing capability, determining the testing capacity of the test station or power research institute, and also determining the amount of financial investment required.

[0003] Impedance devices are a key component of energy storage impulse short-circuit test devices. In the past, the common practice was to use multiple impedance devices connected in series to meet the requirement of a large target short-circuit current range. Such a combination requires a large investment, and another key problem is that the test circuit is too long, the circuit impedance is large, and it is difficult to output a large test current (e.g., 65KA).

[0004] Traditional impedance regulation mainly relies on manual operation via isolating switches, which is slow, inefficient, and lacks automatic adjustment capabilities. This fails to meet the demands of digital and intelligent development.

[0005] Based on this, the present invention designs a three-phase impedance system integrated device to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a three-phase impedance system integrated device.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A three-phase impedance system integrated device includes an impedance device housing, a resistance adjustment component and an inductance adjustment module installed inside the impedance device housing, and a power input port, a 30KA test sample end interface and a 50KA test sample end interface installed on the impedance device housing. It also includes a pneumatic switch assembly, which includes a knife switch, a handle, a hinge sleeve, an ear-type support and a hinge block. The cylinder is installed through the hinge sleeve, the ear-type support, the cylinder and the hinge block and drives the pneumatic switch assembly to operate.

[0009] Furthermore, the 30KA test sample interface and the 50KA test sample interface output 30KA current and 50KA current respectively, and the 30KA current output reuses part of the 50KA impedance.

[0010] Furthermore, the inductance adjustment module includes a stainless steel retainer, a clamp, an inductor coil, and a tray, wherein the inductor coil is fixed to the tray by the clamp and the stainless steel retainer.

[0011] Furthermore, the pneumatic switch assembly also includes a mounting base, which is fixed to the bottom surface of the knife switch. The bottom surface of the ear-type support is fixed to the top surface of the mounting base and located on one side of the knife switch. An insulating block is fixedly connected to the surface of the handle. Two hinge sleeves are provided, one of which is fixedly connected to the insulating block. The hinge block is hinged to one of the hinge sleeves, and the other hinge sleeve is hinged to the surface of the ear-type support. The other end of the hinge block is fixedly connected to the telescopic end of the cylinder, and the end face of the cylinder housing is fixed to the surface of the other hinge sleeve.

[0012] Furthermore, the pneumatic switch assembly switches the on / off path via a cylinder and a handle.

[0013] Furthermore, a mounting base is fixedly connected to the bottom surface of the impedance device housing.

[0014] Furthermore, the bottom surface of the mounting base is made of rubber.

[0015] Furthermore, the casing of the impedance device is made of insulating and flame-retardant materials.

[0016] Compared with the prior art, the advantages of this utility model are as follows: by setting the impedance device shell, resistance adjustment component, and inductance adjustment module, the 50KA and 30KA impedances are integrated into the same device to form an impedance integrated structure. Unlike the traditional multi-set impedance series mode, this reduces the length of the test line and the line loss, achieving multiple savings in materials, space, and money. In addition, the use of pneumatic switch component 3 to replace manual adjustment shortens the adjustment time and improves efficiency, avoiding the risk of human error and equipment damage, thereby improving the safety and reliability of the test. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of the casing of the impedance device;

[0019] Figure 2 This is a side view of the casing of the impedance device;

[0020] Figure 3 This is a side view of the inductor adjustment module;

[0021] Figure 4 A three-dimensional structural view of a pneumatic switch assembly;

[0022] Figure 5 Impedance adjustment principle Figure 1 ;

[0023] Figure 6 Impedance adjustment principle Figure 2 .

[0024] The labels in the diagram represent:

[0025] 1. Impedance device housing; 2. Resistance adjustment assembly; 3. Pneumatic switch assembly; 31. Mounting base; 32. Knife switch; 33. Handle; 34. Insulating block; 35. Hinge sleeve; 36. Ear-type support; 37. Cylinder; 38. Hinge block; 4. Power input port; 5. 30KA test sample end interface; 6. 50KA test sample end interface; 7. Inductance adjustment module; 701. Stainless steel fastener; 702. Clamping block; 703. Inductor coil; 704. Support plate; 8. Mounting base. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] In some embodiments, please refer to the accompanying drawings. Figures 1-4 A three-phase impedance system integrated device includes an impedance device housing 1, which is made of insulating and flame-retardant material. An independent cavity is formed inside to accommodate a resistance adjustment component 2, an inductance adjustment module 7, and a pneumatic switch component 3. A power input port 4 is also provided on the surface of the impedance device housing 1. A 30KA test sample end interface 5 and a 50KA test sample end interface 6 are provided on one side of the impedance device housing 1. A mounting base 8 is also bolted to the bottom surface of the impedance device housing 1. The bottom surface of the mounting base 8 is preferably fitted with an embedded rubber shock-absorbing pad for vibration buffering of the equipment.

[0028] In the above embodiments, the insulating and flame-retardant material can be an epoxy resin glass fiber composite material.

[0029] In some embodiments, such as Figures 1-4As shown, in a preferred embodiment of this utility model, a mounting base 31 is fixed to the bottom surface of the knife switch 32 by bolts, forming the mounting base of the pneumatic switch assembly 3. The surface of the handle 33 is covered with an insulating block 34 to prevent leakage during operation. The moving contact and stationary contact on the pneumatic switch assembly 3 are respectively connected to different impedance branches of the resistance adjustment assembly 2. In the prior art, the stationary contact is usually located at the upper end of the knife switch 32 and is responsible for connecting the power line. The moving contact is located at the lower end and realizes the opening or closing of the circuit through mechanical action. When the switch is open, the moving contact separates from the stationary contact, and the moving contact is de-energized, ensuring that the equipment is not energized when the switch is open, thereby ensuring safety.

[0030] In some embodiments, such as Figures 1-4 As shown, in a preferred embodiment of the present invention, the hinge sleeve 35 consists of two sets of metal parts. One set is welded and fixed to the insulating block 34, and the other set is installed on the surface of the ear support 36 by bolts. The ear support 36 is fixed to the mounting base 31 to form the support fulcrum of the cylinder 37.

[0031] Among them, cylinder 37 is a double-acting pneumatic cylinder. The end of its piston rod is hinged to the hinge sleeve 35 on the side of the insulating block 34 through the hinge block 38, and the tail of the cylinder body is hinged to the ear support 36. When cylinder 37 is filled with air, the piston rod extends and retracts, driving the handle 33 to swing, which drives the knife switch 32 to switch the on and off paths, realizing the access of different impedance branches.

[0032] like Figure 5 , Figure 6 As shown, the device achieves dual current level output through impedance integration layout: the 50KA impedance branch is composed of the R1-R5 resistor unit of the resistor adjustment component 2 and the L1-L3 inductor coil of the inductor adjustment module 7 connected in series, with a total impedance value of Z50. The 30KA impedance branch reuses the R1-R3 resistor unit and L1 inductor coil of the 50KA impedance, and additionally connects the R6 resistor unit in parallel, with a total impedance value of Z30 = Z50 × (R1-R3+R6) / (R1-R5)+L1.

[0033] By switching the knife switch 32 of the pneumatic switch assembly 3, the output of the 50KA test sample terminal interface 6 or the 30KA test sample terminal interface 5 can be directly selected, eliminating the need for multiple impedance devices in series and reducing the line length by more than 60%.

[0034] In some embodiments, such as Figures 1-6 As shown, in a preferred embodiment of the present invention, the inductor coil 703 is provided in three groups, namely L1, L2 and L3. Each group of coils is fixed above the support plate 704 by a clamping block 702 and a stainless steel fastener 701.

[0035] By loosening the stainless steel fastener 701, the movable clamp 702 can be used to adjust the coil spacing, thereby continuously adjusting the inductance value within the range of 10mH-50mH to meet the power factor requirements of different short-circuit tests.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A three-phase impedance system integrated device, comprising an impedance device housing (1), a resistance adjustment assembly (2) and an inductance adjustment module (7) installed within the impedance device housing (1), and a power input port (4), a 30KA test sample interface (5), and a 50KA test sample interface (6) installed on the impedance device housing (1), characterized in that: It also includes a pneumatic switch assembly (3), which includes a knife switch (32), a handle (33), a hinge sleeve (35), an ear support (36), a cylinder (37), and a hinge block (38). The cylinder (37) is mounted on and drives the pneumatic switch assembly (3) through the hinge sleeve (35), the ear support (36), and the hinge block (38).

2. The three-phase impedance system integrated device according to claim 1, characterized in that, The 30KA test sample terminal interface (5) and the 50KA test sample terminal interface (6) output 30KA current and 50KA current respectively, and the 30KA current output reuses the 50KA impedance.

3. The three-phase impedance system integrated device according to claim 1, characterized in that, The inductance adjustment module (7) includes a stainless steel retainer (701), a clamp (702), an inductor coil (703), and a support plate (704). The inductor coil (703) is fixed to the support plate (704) by the clamp (702) and the stainless steel retainer (701). The inductance value is adjusted by adjusting the spacing or number of turns of the inductor coil (703).

4. The three-phase impedance system integrated device according to claim 1, characterized in that, The pneumatic switch assembly (3) also includes a mounting base (31), which is fixed to the bottom surface of the knife switch (32). The bottom surface of the ear-type support (36) is fixed to the top surface of the mounting base (31) and located on one side of the knife switch (32). An insulating block (34) is fixedly connected to the surface of the handle (33). There are two hinge sleeves (35), one of which is fixedly connected to the insulating block (34). The hinge block (38) is hinged to one of the hinge sleeves (35), and the other hinge sleeve (35) is hinged to the surface of the ear-type support (36). The other end of the hinge block (38) is fixedly connected to the telescopic end of the cylinder (37). The housing end face of the cylinder (37) is fixed to the surface of the other hinge sleeve (35).

5. The three-phase impedance system integrated device according to claim 1, characterized in that, The pneumatic switch assembly (3) switches the on / off path via a cylinder (37) and a handle (33), which can adapt to impedance adjustment requirements of different current levels or power factor requirements.

6. The three-phase impedance system integrated device according to claim 1, characterized in that, The bottom surface of the impedance device housing (1) is fixedly connected to the mounting base (8).

7. The three-phase impedance system integrated device according to claim 6, characterized in that, The bottom surface of the mounting base (8) is made of rubber.

8. The three-phase impedance system integrated device according to claim 1, characterized in that, The housing (1) of the impedance device is made of insulating and flame-retardant material.

Images