CN115128328A - Primary side current and leakage current integrated measurement device - Google Patents
Primary side current and leakage current integrated measurement device Download PDFInfo
- Publication number
- CN115128328A CN115128328A CN202210763060.3A CN202210763060A CN115128328A CN 115128328 A CN115128328 A CN 115128328A CN 202210763060 A CN202210763060 A CN 202210763060A CN 115128328 A CN115128328 A CN 115128328A
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- Prior art keywords
- circuit board
- baffle
- current
- magnetic core
- shielding box
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention relates to a measuring device for integrally measuring primary side current and leakage current, which comprises a circuit board, a magnetic core, a coil, a programmable current chip and a shell, wherein the magnetic core is arranged on the circuit board; the circuit board, the magnetic core, the baffle, the first shielding box cover plate, the shielding box baffle and the second shielding box cover plate are sequentially arranged in the shell, a coil is arranged in the shielding box baffle, the coil is connected with the circuit board and transmits a signal to the circuit board, and the circuit board outputs a leakage current signal through a signal amplifying circuit; the baffle is clamped with an opening air gap of the magnetic core, and a programmable current chip is arranged in the opening air gap of the magnetic core; at least one power socket, at least one signal output socket and at least one potentiometer are arranged on the outer side face of the circuit board. The invention can simultaneously measure the primary side current and the leakage current in the direct current loop, reduce the product cost and save the installation space in a customer cabinet.
Description
Technical Field
The invention relates to the technical field of current sensors, in particular to a measuring device for integrally measuring primary side current and leakage current, which is used for simultaneously measuring the primary side current and the leakage current in a direct current loop.
Background
In order to ensure the safety of the circuit, when the circuit is used for a long time, the current measuring equipment is mostly needed to measure the circuit. At present, the sensors for measuring the current of the direct-current column head cabinet have the following defects:
(1) for an outgoing line loop, a sensor is needed to measure the primary side current in a circuit and a sensor is needed to measure the leakage current in the circuit, so that not only is the customer cost increased, but also the space in a cabinet is occupied;
(2) the sensor for measuring the primary side current in the line generally adjusts the zero output potential and the full output potential of the sensor through a potentiometer, and the potentiometer is easily affected by vibration to cause resistance change, so that errors are brought to the zero and full of the sensor;
(3) the sensor needs to change hardware parameters to achieve different measuring ranges and output, needs to be filled with glue, and cannot be put in stock in advance in large quantities;
(4) when the sensor is installed on site, workers are required to screw the wire to the terminal of the sensor, and due to the fact that the number of loops is large, time is consumed, and the cost of the terminal is high.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned disadvantages, and to provide a measuring device for integrally measuring a primary side current and a leakage current, which can simultaneously measure the primary side current and the leakage current in a dc circuit.
The purpose of the invention is realized as follows:
a measuring device for integrated measurement of primary side current and leakage current comprises a circuit board, a magnetic core, a coil, a programmable current chip and a shell; the circuit board is connected with the circuit board and transmits signals to the circuit board, and the circuit board outputs direct current leakage current signals through a signal amplifying circuit; the baffle is clamped with an opening air gap of the magnetic core, and a programmable current chip is arranged in the opening air gap of the magnetic core; at least one power socket, at least one signal output socket and at least one potentiometer are arranged on the outer side face of the circuit board.
Furthermore, at least one perforated column is arranged in the shell, and a circuit board, a magnetic core, a baffle, a first shielding box cover plate, a shielding box baffle and a second shielding box cover plate are sequentially sleeved on the perforated column;
furthermore, the circuit board and the baffle are provided with round holes corresponding to the same positions of the perforated columns, and the round holes are respectively matched with the positions of the perforated columns correspondingly.
Furthermore, a convex block is arranged at the edge of one side of the baffle plate and is correspondingly matched with the opening air gap of the magnetic core, and the magnetic core is clamped into the convex block of the baffle plate through the opening air gap of the magnetic core so as to be connected with the baffle plate.
Further, the coil is soldered to the circuit board through its two taps to be connected to the circuit board.
Furthermore, the power sockets are connected with each other through the circuit board.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention integrates the functions of primary side current measurement and leakage current measurement, realizes the simultaneous measurement of the primary side current and the leakage current in the direct current loop, reduces the product cost and saves the installation space in a customer cabinet.
(2) The invention adopts the programmable current chip, does not need a potentiometer and reduces the error brought by the potentiometer.
(3) The sensor of the invention can be used for mass stock in advance without changing hardware parameters, and can realize different measuring ranges and output of the sensor by setting the programmable current chip through the programmer.
(4) When the sensor is installed on site, workers do not need to twist wires and only need to plug wire ends to terminals corresponding to the sensors, and construction time is saved.
Drawings
FIG. 1 is an exploded view of the present invention.
Fig. 2 is an electrical connection diagram of the circuit board of the present invention.
FIG. 3 is a functional flow diagram of the present invention.
Wherein:
the circuit board comprises a circuit board 1, a magnetic core 2, a baffle 3, a first shielding box cover plate 4, a coil 5, a shielding box baffle 6, a second shielding box cover plate 7, a shell 8, a first power socket 9, a signal output socket 10, a second power socket 11, a programmable current chip 12 and a potentiometer 13.
Detailed Description
For a better understanding of the technical aspects of the present invention, reference will now be made in detail to the accompanying drawings. It should be understood that the following specific examples are not intended to limit the embodiments of the present invention, but are merely exemplary embodiments of the present invention. It should be noted that the description of the positional relationship of the components, such as the component a is located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.
Example 1:
referring to fig. 1-3, fig. 1 depicts an exploded view of the present invention. As shown in the figure, the measuring device for integrally measuring the primary side current and the leakage current comprises a circuit board 1, a magnetic core 2, a coil 5, a programmable current chip 12 and a shell 8.
Be equipped with two parallel perforation columns in the casing 8, punch the column and overlap in proper order outward and establish circuit board 1, magnetic core 2, baffle 3, first shielding box apron 4, shielding box baffle 6 and second shielding box apron 7, the same positions of circuit board 1 and baffle 3 are equipped with two round holes, correspond the matching with the position of perforation column respectively, and the round hole on circuit board 1 and the baffle 3 is aimed at the perforation column in the casing 8 promptly, is convenient for fix.
A coil 5 is arranged in the shielding box baffle 6, two taps of the coil 5 are welded on the circuit board 1 to transmit signals to the circuit board 1, and the circuit board 1 outputs direct current leakage current signals through a signal amplifying circuit; the front and the back of the shielding box baffle 6 are sequentially provided with a first shielding box cover plate 4 and a second shielding box cover plate 7 for fixation.
A lug is arranged on one side edge of the round hole of the baffle plate 3 and correspondingly matched with the opening air gap of the magnetic core 2, and the magnetic core 2 is clamped on the lug of the baffle plate 3 through the opening air gap so as to be connected with the baffle plate 3; meanwhile, a programmable current chip 12 is arranged in the open air gap of the magnetic core 2.
A row of first power sockets 9, signal output sockets 10, second power sockets 11 and potentiometers 13 which are sequentially arranged are arranged at the bottom of the outer side surface of the circuit board 1, the first power sockets 9 are power supply interfaces of the sensors, and the first power sockets 9 are connected with the second power sockets 11 through the interior of the circuit board 1; the second power socket 11 is convenient for field construction personnel to connect the sensor power supplies in parallel; the signal output socket 10 is an output interface of the sensor, and includes a primary side current output signal and a leakage current output signal; the potentiometer 13 is used to adjust the zero potential of the leakage current output signal when there is no leakage current.
The working principle is as follows:
a second shielding box cover plate 7 is arranged in a shell 8, a shielding box baffle plate 6 is arranged in the shell 8, a coil 5 is arranged in the shielding box baffle plate 6, a shielding box cover plate 4 is arranged on the shielding box baffle plate 6, the baffle plate 3 is arranged in the shell 8 by aligning two through holes of the shell 8, an open air gap of a magnetic core 2 is arranged in a bulge of the baffle plate 3, a programmable current chip 12 in a circuit board 1 is arranged in the open air gap of the magnetic core 2, an open hole of the circuit board 1 penetrates through the through hole of the shell 8, and a tap of the coil 5 is welded on the circuit board 1; glue is poured into the housing 8 to secure all components.
The electric connection of the circuit board is composed of a first power socket 9, a second power socket 11, a signal output socket 10, a programmable current chip 12, a magnetic core 2, a coil 5 and a potentiometer 13.
The first power socket 9 is a power supply interface of the sensor, and the first power socket 9 is connected with the second power socket 11 through the circuit board 1; the second power socket 11 is convenient for field construction personnel to connect the sensor power supplies in parallel; the signal output socket 10 is an output interface of the sensor, and includes a primary side current output signal and a leakage current output signal.
The magnetic core 2 applies a magnetic field generated by the primary-side current to the programmable current chip 12, and the programmable current chip 12 outputs a corresponding primary-side current signal.
The coil 5 generates an excitation magnetic field for measuring leakage current, two taps of the coil 5 are welded on the circuit board 1 to transmit signals to the circuit board 1, and the circuit board 1 outputs leakage current signals through a signal amplifying circuit. The potentiometer 13 is used to adjust the zero potential of the leakage current output signal when there is no leakage current.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (6)
1. A measurement device for integrative measurement of primary side current and leakage current is characterized in that: the circuit comprises a circuit board (1), a magnetic core (2), a coil (5), a programmable current chip (12) and a shell (8); a circuit board (1), a magnetic core (2), a baffle (3), a first shielding box cover plate (4), a shielding box baffle (6) and a second shielding box cover plate (7) are sequentially arranged in the shell (8), a coil (5) is arranged in the shielding box baffle (6), the coil (5) is connected with the circuit board (1) and transmits signals to the circuit board (1), and the circuit board (1) outputs direct current leakage current signals through a signal amplifying circuit; the baffle (3) is clamped with an open air gap of the magnetic core (2), and a programmable current chip (12) is arranged in the open air gap of the magnetic core (2); the outer side surface of the circuit board (1) is provided with at least one power socket, a signal output socket (10) and a potentiometer (13).
2. The apparatus of claim 1, wherein the primary-side current and the leakage current are measured together, and the apparatus further comprises: be equipped with in casing (8) and be no less than one perforation post, overlap in proper order on the perforation post and establish circuit board (1), magnetic core (2), baffle (3), first shielding box cover board (4), shielding box baffle (6) and second shielding box cover board (7).
3. The apparatus of claim 2, wherein the primary-side current and the leakage current are measured together, and the apparatus further comprises: and round holes are arranged at the same positions of the circuit board (1) and the baffle (3) corresponding to the perforated columns and are respectively matched with the perforated columns correspondingly.
4. The apparatus of claim 1, wherein the primary-side current and the leakage current are measured together, and the apparatus further comprises: the edge of one side of baffle (3) is equipped with a lug, corresponds the matching with the opening air gap of magnetic core (2), thereby magnetic core (2) are connected with baffle (3) through its opening air gap card income on the lug of baffle (3).
5. The apparatus of claim 1, wherein the primary-side current and the leakage current are measured together, and the apparatus further comprises: the coil (5) is soldered to the circuit board (1) through two taps thereof to be connected to the circuit board (1).
6. The apparatus of claim 1, wherein the primary-side current and the leakage current are measured together, and the apparatus further comprises: the power sockets are connected with each other through the circuit board (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210763060.3A CN115128328A (en) | 2022-07-01 | 2022-07-01 | Primary side current and leakage current integrated measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210763060.3A CN115128328A (en) | 2022-07-01 | 2022-07-01 | Primary side current and leakage current integrated measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115128328A true CN115128328A (en) | 2022-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210763060.3A Pending CN115128328A (en) | 2022-07-01 | 2022-07-01 | Primary side current and leakage current integrated measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115128328A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774100A (en) * | 2023-08-15 | 2023-09-19 | 江苏东方四通科技股份有限公司 | Leakage monitoring module and power cabinet with same |
-
2022
- 2022-07-01 CN CN202210763060.3A patent/CN115128328A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774100A (en) * | 2023-08-15 | 2023-09-19 | 江苏东方四通科技股份有限公司 | Leakage monitoring module and power cabinet with same |
| CN116774100B (en) * | 2023-08-15 | 2023-11-07 | 江苏东方四通科技股份有限公司 | Leakage monitoring module and power cabinet with same |
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