CN211627662U - Measurement and protection integrated low-voltage alternating current acquisition device - Google Patents
Measurement and protection integrated low-voltage alternating current acquisition device Download PDFInfo
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- CN211627662U CN211627662U CN202020056603.4U CN202020056603U CN211627662U CN 211627662 U CN211627662 U CN 211627662U CN 202020056603 U CN202020056603 U CN 202020056603U CN 211627662 U CN211627662 U CN 211627662U
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Abstract
The utility model relates to a measurement and protection integrated low-voltage alternating current acquisition device, which comprises a first shell, a second shell, a measurement coil, a protection coil and an isolation cover plate; the first shell and the second shell are connected into a shell through an isolation cover plate, and a measuring coil and a protection coil are arranged in the shell; all be equipped with an inclined plane on first casing and the second casing, inclined plane one side of first casing is equipped with binding post A and binding post B, inclined plane one side of second casing is equipped with binding post C and binding post D. The utility model discloses it is fixed with protection coil adoption epoxy to measure coil and protection coil to be provided with the insulating layer between the coil, the scene installation is nimble convenient, reduces the human cost.
Description
Technical Field
The utility model relates to a mutual-inductor technical field especially relates to a measure protection integral type low pressure alternating current collection system.
Background
With the progress of science and technology, the development of the power industry is rapid, a measurement type current transformer is commonly used in a low-voltage power distribution system to collect current signals, a protection type current transformer is used for protecting a power system, and short circuit or overload current is detected, so that the method has wide application. However, in the field of low-voltage current transformers, the measurement current transformers and the protection current transformers sold in the market are 2 independent products, in order to achieve the measurement and protection functions of an electric power system, 2 groups of current transformers are generally required to be installed, the field installation is complex, and the labor cost is increased.
In addition, current transformer's model is generally divided into type II and type III according to the difference of binding post position on the existing market, and the binding post of type II is held at the shell length, and type III needs rationally select for use according to the copper bar arrangement mode at the shell weak point during the use. However, in the actual production process, since the terminal is located at the intermediate position, a large space is required for mounting the B mutual sensor, resulting in a high material cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned not enough, provide a measure protection integral type low pressure alternating current collection system, the installation is nimble, reduce cost.
The purpose of the utility model is realized like this:
a measurement and protection integrated low-voltage alternating current acquisition device comprises a first shell, a second shell, a measurement coil, a protection coil and an isolation cover plate; the first shell and the second shell are connected into a shell through an isolation cover plate, and a measuring coil and a protection coil are arranged in the shell; all be equipped with an inclined plane on first casing and the second casing, inclined plane one side of first casing is equipped with binding post A and binding post B, inclined plane one side of second casing is equipped with binding post C and binding post D.
Further, an insulating layer is arranged between the measuring coil and the protection coil.
Furthermore, one side of the isolation cover plate is provided with a wiring terminal mounting hole matched with the wiring terminal A and the wiring terminal B and clamped with the inclined plane of the first shell, and the other side of the isolation cover plate is provided with a wiring terminal mounting hole matched with the wiring terminal C and the wiring terminal D and clamped with the inclined plane of the second shell.
Furthermore, the middle part of the isolation cover plate is provided with an isolation belt, two ends of the isolation belt are respectively provided with a bulge, and the bulges are provided with lead sealing holes.
Further, the inclined plane both sides of first casing and second casing all are equipped with flip guide slot for connect flip, flip includes the same and symmetrical arrangement's of structure first flip and second flip, and first flip inlays in binding post A and binding post C top, and second flip inlays in binding post B and binding post D top.
Furthermore, the first flip cover is provided with a through hole corresponding to the position of the lead sealing hole, and when the flip cover is closed, the lead sealing hole penetrates through the through hole to form a lead sealing part.
Furthermore, detachable baffles are arranged at two ends of the first turnover cover.
Furthermore, the measuring coil and the protection coil are fixed by epoxy resin.
Further, the front of first casing and second casing is provided with the installation bayonet socket respectively, the bottom of first casing and second casing all is provided with the bottom plate mounting hole.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses it is fixed with measurement coil and protection coil adoption epoxy to be provided with the insulating layer between the coil, wherein measure coil output signal and transmit and be used for measurement system loop current for the electric power instrument, protection coil output signal transmits for protection device, and the scene installation is nimble convenient, reduces the human cost.
(2) The wiring terminal that the slant set up can practice thrift B looks installation space when using, and can be used for horizontal and two kinds of vertical copper bar arrangement modes, safe and reliable, reduce cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded view of the present invention.
Fig. 3 is a front view of the present invention.
Fig. 4 is a side view of the present invention.
Fig. 5 is a top view of the present invention.
Fig. 6 is a schematic structural diagram of the measuring coil of the present invention.
Fig. 7 is a schematic structural diagram of the protection coil of the present invention.
Fig. 8 is a schematic diagram of the present invention.
Wherein:
the device comprises a first shell 1, a second shell 2, a measuring coil 3, a protection coil 4, a wiring terminal A5.1, a wiring terminal B5.2, a wiring terminal C5.3, a wiring terminal D5.4, an insulating layer 6, an isolation cover plate 7, an isolation belt 7.1, a lead sealing hole 7.2, a first flip cover 8, a second flip cover 8.0, a flip cover guide groove 8.1, a through hole 8.2, a detachable baffle 8.3, a locking hole 9, an installation buckle 10 and a bottom plate installation hole 11.
Detailed Description
Example 1:
referring to fig. 1-8, the utility model relates to a measurement and protection integrated low-voltage alternating current collecting device, which comprises a first shell 1, a second shell 2, a measuring coil 3, a protecting coil 4 and an isolating cover plate 7; the first shell 1 and the second shell 2 are connected into a shell through an isolation cover plate 7, and a measuring coil 3 and a protection coil 4 are arranged in the shell; the measuring coil 3 and the protection coil 4 are fixed by epoxy resin, and an insulating layer 6 is arranged between the measuring coil 3 and the protection coil 4 to enhance insulation.
The first shell 1 and the second shell 2 are both provided with an inclined plane, one side of the inclined plane of the first shell 1 is provided with a wiring terminal A5.1 and a wiring terminal B5.2 which are used for transmitting a measuring coil signal, and one side of the inclined plane of the second shell 2 is provided with a wiring terminal C5.3 and a wiring terminal D5.4 which are used for transmitting a protection coil signal; the wiring terminal that the slant set up can practice thrift the installation space of B looks when using, and can be used for horizontal and two kinds of vertical copper bar arrangement modes.
One side of the isolation cover plate 7 is provided with a wiring terminal mounting hole matched with the wiring terminal A5.1 and the wiring terminal B5.2 and clamped with the inclined plane of the first shell 1, and the other side of the isolation cover plate is provided with a wiring terminal mounting hole matched with the wiring terminal C5.3 and the wiring terminal D5.4 and clamped with the inclined plane of the second shell 2; the middle part of the isolation cover plate 7 is provided with an isolation belt 7.1, two ends of the isolation belt 7.1 are respectively provided with a bulge, and a lead sealing hole 7.2 is arranged on each bulge.
Inclined plane both sides of first casing 1 and second casing 2 all are equipped with flip guide slot 8.1 for connect flip, flip include the same and symmetrical arrangement's of structure first flip 8 and second flip 8.0, and first flip 8 inlays in binding post A5.1 and binding post C5.3 top, and second flip 8.0 inlays in binding post B5.2 and binding post D5.4 top.
The first turning cover 8 is provided with a through hole 8.2 corresponding to the lead sealing hole 7.2, and when the turning cover is closed, the lead sealing hole 7.2 penetrates through the through hole 8.2 to form a lead sealing part; the two ends of the first turnover cover 8 are provided with detachable baffles 8.3, the secondary leading-out wires can be led out from different directions, and the turnover cover is closed after the installation is completed, so that an open type design of the wiring terminal is formed, and the wiring hole does not need to be penetrated during wiring.
The working principle is as follows:
referring to fig. 8, a primary winding of a current transformer is connected in series in a measured line, I1 is a line current, i.e., a primary current of the current transformer, N1 is a primary turn number of the current transformer, I21 is a secondary current (typically 5A, 1A) of a measurement winding, I22 is a secondary current (typically 5A, 1A) of a protection winding, N2 is a secondary turn number of the current transformer, and the number of turns of the measurement winding is the same as that of the protection winding. Z2e1 is the secondary loop measurement equipment and the connecting wire impedance, and Z2e2 is the secondary loop protection equipment and the connecting wire impedance. When a primary current flows in from the end P1 of the current transformer and flows out from the end P2, and when the secondary Z2e1 and Z2e2 are connected, the current transformer measurement winding has a current I21 flowing through 1S1 and passes through Z2e1 to 1S2 to form a closed loop by the principle of electromagnetic induction. The current transformer protection winding has current I22 flowing through it from 2S1 to 2S2 via Z2e2 to form a closed loop. Therefore, the current can be obtained under the ideal condition of I1 multiplied by N1= I2 multiplied by N2, so that I1/I2= N1/N2= K, and K is the transformation ratio of the current transformer.
The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a measure protection integral type low pressure alternating current collection system which characterized in that: the device comprises a first shell (1), a second shell (2), a measuring coil (3), a protection coil (4) and an isolation cover plate (7); the first shell (1) and the second shell (2) are connected into a shell through an isolation cover plate (7), and a measuring coil (3) and a protection coil (4) are arranged in the shell; all be equipped with an inclined plane on first casing (1) and second casing (2), inclined plane one side of first casing (1) is equipped with binding post A (5.1) and binding post B (5.2), inclined plane one side of second casing (2) is equipped with binding post C (5.3) and binding post D (5.4).
2. The measurement and protection integrated low-voltage alternating current collecting device according to claim 1, wherein: an insulating layer (6) is arranged between the measuring coil (3) and the protective coil (4).
3. The measurement and protection integrated low-voltage alternating current collecting device according to claim 1, wherein: one side of isolation apron (7) is equipped with binding post A (5.1) and binding post B (5.2) assorted binding post mounting hole to with the inclined plane block of first casing (1), the opposite side is equipped with binding post C (5.3) and binding post D (5.4) assorted binding post mounting hole, and with the inclined plane block of second casing (2).
4. The measurement and protection integrated low-voltage alternating current collecting device according to claim 1, wherein: the middle part of the isolation cover plate (7) is provided with an isolation belt (7.1), two ends of the isolation belt (7.1) are respectively provided with a bulge, and a lead sealing hole (7.2) is arranged on each bulge.
5. The measurement and protection integrated low-voltage alternating current collecting device according to claim 1, wherein: inclined plane both sides of first casing (1) and second casing (2) all are equipped with flip guide slot (8.1) for connect flip, flip include the same and symmetrical arrangement's of structure first flip (8) and second flip (8.0), and binding post A (5.1) and binding post C (5.3) top are inlayed in first flip (8), and binding post B (5.2) and binding post D (5.4) top are inlayed in second flip (8.0).
6. The measurement and protection integrated low-voltage alternating current collecting device according to claim 5, wherein: and the first flip cover (8) is provided with a through hole (8.2) corresponding to the lead sealing hole (7.2), and when the flip cover is closed, the lead sealing hole (7.2) penetrates through the through hole (8.2) to form a lead sealing part.
7. The measurement and protection integrated low-voltage alternating current collecting device according to claim 5, wherein: and two ends of the first turnover cover (8) are provided with detachable baffles (8.3).
8. The measurement and protection integrated low-voltage alternating current collecting device according to claim 1, wherein: the measuring coil (3) and the protective coil (4) are fixed by epoxy resin.
9. The measurement and protection integrated low-voltage alternating current collecting device according to claim 1, wherein: the front of first casing (1) and second casing (2) is provided with installation bayonet socket (10) respectively, the bottom of first casing (1) and second casing (2) all is provided with bottom plate mounting hole (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020056603.4U CN211627662U (en) | 2020-01-13 | 2020-01-13 | Measurement and protection integrated low-voltage alternating current acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020056603.4U CN211627662U (en) | 2020-01-13 | 2020-01-13 | Measurement and protection integrated low-voltage alternating current acquisition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211627662U true CN211627662U (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020056603.4U Active CN211627662U (en) | 2020-01-13 | 2020-01-13 | Measurement and protection integrated low-voltage alternating current acquisition device |
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| Country | Link |
|---|---|
| CN (1) | CN211627662U (en) |
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2020
- 2020-01-13 CN CN202020056603.4U patent/CN211627662U/en active Active
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