Direct-type alternating current and voltage acquisition device

Abstract

The utility model provides a direct-type alternating current and voltage acquisition device which comprises a shell, a metal basket is connected to the top surface of the shell through a bolt arranged in a penetrating mode, an opening is formed in the middle of the shell, a primary busbar penetrates through the opening from outside to inside of the shell, a coil is arranged in the shell in a sleeved mode, and an output line of the coil is connected to a switching circuit board. The primary busbar is connected in series with a measured line and is connected to the switching circuit board through a voltage RV line, the switching circuit board is provided with two terminal sockets for respectively measuring voltage and current, the side part of the primary busbar is provided with a notch clamped with the shell, one end of the primary busbar far away from the shell is directly inserted and connected to the circuit breaker, the switching circuit board is provided with a TVS tube, and the TVS tube is connected with the shell. When the secondary winding is in an open-circuit state, the diode is in a low-resistance state, so that the secondary winding is short-circuited to suppress overvoltage, and the safety of equipment and operators is protected.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a direct AC current and voltage acquisition device for AC power detection in data centers. Background Technology

[0002] In data center power systems, AC current detection is a crucial component for energy management, fault early warning, and equipment protection. Products used for AC current detection in data centers include current and / or voltage transformers. However, these structures are mostly fixed with screws, requiring pre-drilling of holes in the supporting structure such as the cabinet base plate before installation. Furthermore, such structures occupy a significant amount of internal cabinet space, leading to installation inconvenience.

[0003] Furthermore, secondary winding refers to the process of winding the secondary (low-voltage side) winding onto the iron core according to specific rules, so as to proportionally convert the high current on the primary side (high-voltage side) into a safe and measurable low-value signal. Traditional instrument transformers have secondary leads of a certain length. However, the secondary leads at the construction site need to be determined according to the distance between the device and the instrument. In addition, the number of turns of the secondary winding of the detection module is relatively large, which requires high skill from the operators. Careless operation can lead to open circuit voltage safety issues. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a direct AC voltage acquisition device, solving at least one of the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A direct AC current and voltage acquisition device includes a housing. The top surface of the housing is connected to a metal basket inside the housing by a through bolt. The housing has an opening in the middle. A primary busbar passes through the opening from the outside to the inside of the housing and a coil is sleeved inside the housing. The output line of the coil is connected to a converter circuit board. The primary busbar is connected in series with the circuit under test and is connected to the converter circuit board through a voltage RV line. The converter circuit board is located at the bottom inside the housing. The converter circuit board is provided with terminal sockets and solid-state surge protection devices.

[0007] Furthermore, the solid-state surge protection device is a TVS diode, which is connected in parallel with the coil.

[0008] Furthermore, the housing is a split structure, and the split structure housing can be detachably connected.

[0009] Furthermore, the primary busbar is directly inserted into the circuit breaker.

[0010] Furthermore, a notch is provided on the side of the primary busbar, and the notch is snapped onto the housing.

[0011] Furthermore, multiple linear arrays of the aforementioned housings are arranged on the circuit breaker.

[0012] Furthermore, the width of the housing is 1 / 3 of that of the circuit breaker.

[0013] Furthermore, each of the housings is provided with at least two terminal sockets, one for voltage and one for current.

[0014] Furthermore, the housing is provided with a partition plate, which isolates the primary busbar, the adapter circuit board, and the metal basket in separate chambers.

[0015] The advantages and beneficial effects of this utility model are as follows:

[0016] 1. This utility model uses a primary busbar to directly insert into the circuit breaker for fixation, making installation convenient;

[0017] 2. The housing is divided into multiple chambers to separate different functional components, making the AC current and voltage acquisition device shown in this utility model compact in structure and small in size;

[0018] 3. A TVS diode is soldered onto the transfer circuit board. When the secondary winding is in an open circuit state, the diode has a low resistance value, which short-circuits the secondary winding to suppress overvoltage and protect the equipment and operators.

[0019] 4. The secondary lead-out of this utility model adopts a preset terminal socket, which can select lead-out wires of different lengths according to the construction site, without the need to shorten or lengthen the lead-out wires. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is an exploded view of the structure of this utility model.

[0022] Figure 3 This is a front view of the present invention.

[0023] Figure 4 This is a side view of the present invention.

[0024] Figure 5 This is a set of installation diagrams for this utility model.

[0025] Figure 6 This is a schematic diagram illustrating the functional principle of this utility model.

[0026] In the diagram: 1. Housing; 2. Primary busbar; 3. Notch; 4. Coil; 5. Adapter circuit board; 6. Terminal socket; 7. TVS tube; 8. Metal basket; 9. Bolt; 10. Voltage RV line; 11. Opening; 12. Circuit breaker; 13. Separator. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0028] Please see Figures 1-6 This utility model provides a direct AC current and voltage acquisition device, including a split, detachable housing 1. A metal basket 8 is fixed inside the housing 1 via a through bolt 9. The interior is divided into independent chambers by a partition plate 13, which respectively accommodate a primary busbar 2, a transition circuit board 5, and the metal basket 8. An opening 11 is provided in the middle of the housing 1, allowing the primary busbar 2, which has a notch 3 on its side, to be directly inserted into a circuit breaker 12. The primary busbar 2 is fixed and installed on the housing 1 by snapping it in place through the notch 3, which also serves as a limiting mechanism to ensure a stable connection of the primary busbar 2. When multiple direct AC current and voltage acquisition devices are arranged in a linear array, the width of each housing 1 is only 1 / 3 of that of the circuit breaker, forming a compact integrated layout.

[0029] As a preferred embodiment, the split structure of the housing 1 facilitates the disassembly, assembly, and maintenance of the device body. The split structure can be achieved by means of bolts, clips, etc.

[0030] The acquisition module of this device includes a coil 4 sleeved on the primary busbar 2. The output line of the coil 4 is connected to the adapter circuit board 5. The voltage RV line 10 is connected to the primary busbar 2, and the other end of the voltage RV line is also connected to the adapter circuit board 5.

[0031] The voltage and / or current signals in the circuit under test are processed by the adapter circuit board 5 and then output through an independent terminal socket 6. The voltage sampling terminal and the current sampling terminal can be physically isolated using insulating plastic or other methods. The adapter circuit board 5 integrates a TVS diode 7 (transient voltage suppressor, also known as an avalanche breakdown diode) as a solid-state surge protection device, which is directly connected in parallel in the circuit of the coil 4. The metal basket 8 provides fixed support for the primary output circuit, and the bottom of the adapter circuit board is fixed with an insulating substrate.

[0032] The working principle of this utility model is as follows: the primary busbar 2 is connected in series in the circuit under test (i.e., the circuit breaker), I1 is the line current (i.e., the primary current of the current detection module), N1 is the number of primary turns of the current detection module, I2 is the secondary current of the current detection module, and N2 is the number of secondary turns of the current detection module. The TVS tube 7 serves as a secondary circuit protection device, Z2e is the impedance of the secondary circuit equipment and / or connecting wires, and V1 is the voltage of the circuit under test.

[0033] When a primary current flows into the primary busbar P1 terminal and flows out of the primary conductor in the field, the voltage RV line 10 obtains the voltage value of that phase.

[0034] When the secondary circuit Z2e is closed, based on the principle of electromagnetic induction, the secondary winding of the current detection module detects a current I2 flowing from S1, through Z2e to S2, forming a closed loop. Therefore, under ideal conditions, the current I1 × N1 = I2 × N2, and thus I1 / I2 = N1 / N2 = K, where K is the transformation ratio of the current transformer. When the secondary circuit Z2e is not closed, a current I2 flows from S1 through the secondary winding of the current detection module, short-circuiting through TVS diode 7 to S2, forming a closed loop, suppressing overvoltage, and protecting the equipment and operators.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A direct AC current and voltage acquisition device, characterized in that, The device includes a housing (1), the top surface of which is connected to a metal basket (8) inside the housing by a through bolt (9). The housing (1) has an opening (11) in the middle. A primary busbar (2) passes through the opening (11) from the outside to the inside of the housing (1) and a coil (4) is installed inside the housing. The output line of the coil (4) is connected to a converter circuit board (5). The primary busbar (2) is connected in series with the circuit under test and connected to the converter circuit board (5) through a voltage RV line (10). The converter circuit board (5) is provided with a terminal socket (6) and a solid-state surge protection device.

2. The AC current and voltage acquisition device according to claim 1, characterized in that, The solid-state surge protection device is a TVS tube (7), which is connected in parallel with the coil (4).

3. The AC current and voltage acquisition device according to claim 2, characterized in that, The shell (1) is a split structure, and the shell (1) of the split structure can be detachably connected.

4. The AC current and voltage acquisition device according to claim 2, characterized in that, The primary busbar (2) is directly inserted into the circuit breaker (12).

5. The AC current and voltage acquisition device according to claim 3, characterized in that, The primary busbar (2) has a notch on its side, and the notch (3) is snapped onto the housing (1).

6. The AC current and voltage acquisition device according to claim 4, characterized in that, Multiple housings (1) are arranged in a linear array on the circuit breaker (12).

7. The AC current and voltage acquisition device according to claim 6, characterized in that, The width of the housing (1) is 1 / 3 of that of the circuit breaker.

8. The AC current and voltage acquisition device according to any one of claims 1-7, characterized in that, Each of the housings (1) is provided with at least two terminal sockets (6), the two terminal sockets (6) being a voltage terminal and a current terminal, respectively.

9. The AC current and voltage acquisition device according to any one of claims 1-7, characterized in that, The housing (1) is provided with a partition plate, which isolates the primary busbar (2), the transfer circuit board (5), and the metal basket (8) in separate chambers.

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