CN110729730A - Built-in isolated voltage-taking protection device and power-taking method - Google Patents
Built-in isolated voltage-taking protection device and power-taking method Download PDFInfo
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- CN110729730A CN110729730A CN201911134810.5A CN201911134810A CN110729730A CN 110729730 A CN110729730 A CN 110729730A CN 201911134810 A CN201911134810 A CN 201911134810A CN 110729730 A CN110729730 A CN 110729730A
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- voltage
- electric quantity
- taking
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- isolating switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a built-in isolated voltage-taking protection device and a power-taking method, wherein the built-in isolated voltage-taking protection device comprises a main loop body and an electric quantity accessory which are integrated into a whole; the electric quantity accessory adopts a fuse and an isolating switch series connection power taking circuit to be connected with a voltage acquisition circuit and integrated on a female seat; the three-phase power supply main loop of the external main loop body of the electric quantity accessory gets voltage points, and fuse module and isolating switch module are connected in series between the voltage points and the voltage acquisition circuit board in sequence. When a withstand voltage test or an insulation test is carried out, the isolating switch is in a disconnected state, and the electric quantity accessory is disconnected from the main loop body. The problem of frequent disassembly and assembly caused by isolation of an external fuse of an electric quantity monitoring accessory of the conventional alternating-current molded case circuit breaker is avoided, the electric quantity accessory is convenient and quick for a user to control, the arrangement in power distribution equipment is simplified, the reliability is improved, and the potential safety hazard of power taking operation is avoided.
Description
Technical Field
The invention belongs to the technical field of marine low-voltage electrical appliances, and particularly relates to an electric quantity monitoring accessory and a power taking method for acquiring information such as branch voltage, current and the like of power distribution equipment.
Background
Along with the development of intelligent ships, the electrical intelligence level of the ships is continuously improved, and a remote monitoring function is provided for the molded case circuit breaker. The electric quantity monitoring accessory is an accessory for monitoring electric parameters of the alternating current molded case circuit breaker, can acquire parameters such as voltage, current and frequency of a power grid, and uploads the parameters to an upper monitoring system in a communication mode.
Because the three-phase voltage acquisition and power obtaining circuit is connected with the main circuit of the molded case circuit breaker, and when the molded case circuit breaker or the distribution board (provided with the molded case circuit breaker) is subjected to a voltage withstand test or an insulation test, the main circuit and the measurement circuit need to be disconnected to form a physical fracture, so that the voltage measurement circuit is prevented from being damaged by the voltage withstand test. Therefore, after the electric quantity monitoring accessory voltage of the conventional alternating-current molded case circuit breaker gets electricity from a bus, the electric quantity monitoring accessory voltage is connected to a measuring loop through an external fuse.
The existing technical scheme can solve the problem of physical isolation of the electric quantity monitoring accessory and the main loop in a voltage withstand test or an insulation test, but in practical application, on one hand, an external fuse and a cable are needed, the difficulty in component arrangement is increased, the internal wiring is more, and the reliability is reduced; on the other hand, because distribution equipment regularly needs to carry out insulation test, when testing at every turn, the user side all will take off the fuse, and the back that finishes testing needs to be loaded back again, and withstand voltage test, insulation test or carry out the regular maintenance user of every turn and need open distribution equipment, operate the inside fuse plug fusible core repeatedly, when bringing inconvenience, still have the potential safety hazard, be unfavorable for keeping the state of equipment, bring inconvenience for the user.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a built-in isolated voltage-taking protection device and a power-taking method, which avoid the problem of frequent disassembly and assembly caused by isolation of an external fuse of the conventional alternating-current molded case circuit breaker electric quantity monitoring accessory, are convenient for users to control the electric quantity accessory more conveniently and quickly, simplify the arrangement in power distribution equipment, improve the reliability and avoid the potential safety hazard of power-taking operation.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a built-in isolated voltage protection device which characterized in that: the device comprises a main loop body and an electric quantity accessory which are integrated into a whole; the electric quantity accessory adopts a fuse and an isolating switch series connection power taking circuit to be connected with a voltage acquisition circuit and integrated on a female seat; the three-phase power supply main loop of the external main loop body of the electric quantity accessory gets voltage points, and fuse module and isolating switch module are connected in series between the voltage points and the voltage acquisition circuit board in sequence.
Further, the female seat is arranged on the side of the main circuit body, and the isolating switch is arranged on the front face of the female seat.
Furthermore, a series circuit is respectively led out from the phase A and the phase C of the three-phase power supply, a fuse and an isolating switch are connected in series on each series circuit to form a series power-taking circuit, and the two isolating switches are arranged in parallel and are positioned on the front side of the electric quantity accessory female seat.
Furthermore, the two isolating switches are arranged by adopting a linkage switch.
A power taking method is characterized in that: by adopting the built-in isolated voltage-taking protection device, when the power-taking work is normal, voltage is introduced from a voltage-taking point, the isolating switch is in a closed state, the fuse is in a working state, and current passes through the fuse, passes through the isolating switch and then enters the voltage acquisition circuit of the electric quantity accessory; when a withstand voltage test or an insulation test is carried out, the isolating switch is placed in a disconnected state, the electric quantity accessory is disconnected from the main loop body, and then the electric quantity accessory or the main loop is respectively operated.
The invention has the technical characteristics that:
the unique structure of the circuit is that the fuse and the isolating switch are connected in series to get electricity. The reliability of voltage taking is ensured during normal work; when a withstand voltage test or an insulation test is carried out, the isolating switch is placed in an off state, so that a fracture is formed, and an electric quantity accessory (a voltage acquisition circuit) is isolated from a main loop. The working state and the disconnection state are switched randomly as required, and meanwhile, because the isolating switch and the fuse are integrated on the female seat of the electric quantity accessory together, the power distribution equipment does not need to be opened, the external fuse does not need to be repeatedly plugged and unplugged, the fusible core is not required to be operated, the reliability is ensured, and the potential safety hazard is avoided.
Isolator and fuse are integrated together and are arranged in the major loop lateral part on the female seat of electric quantity annex, and the inside cable and the components and parts that need arrange of external fuse that do not need of major loop distribution equipment, and the components and parts are arranged the degree of difficulty and are reduced, the internal wiring reduces, increased the reliability. Under the integrated form structure, all voltage acquisition circuits of electric quantity annex all walk the line in the inside completion of electric quantity annex, have reduced the wiring of electric quantity annex, and the product is succinct more and pleasing to the eye.
Drawings
FIG. 1 is a schematic diagram of a built-in isolated voltage-sourced protection device implemented in accordance with the present invention;
FIG. 2 is a schematic diagram of the built-in isolated voltage protection device;
fig. 3 is a side view of fig. 2.
Detailed Description
The circuit diagram of the built-in isolated voltage protection device according to the present invention is shown in fig. 1. The built-in isolated voltage-taking protection device comprises a main circuit body 3 and an electric quantity accessory 4 of the alternating-current molded case circuit breaker, wherein the main circuit body and the electric quantity accessory are integrated into a whole, the fuse module 1, the isolating switch module 2 and the voltage acquisition circuit 41 are integrated on a female seat by the electric quantity accessory 4 and are arranged at the side position of the main circuit body 3, and the isolating switch module 2 is arranged on the front side of the female seat (as shown in a dotted line block diagram of fig. 2 and a side view of fig. 3). The three-phase power supply that electric quantity annex 4 external main loop body 3 was female arranges, in electric quantity annex 4, series connection fuse module 1 and isolator module 2 in order between main loop gets voltage point and voltage acquisition circuit 41. Preferably, UA is connected in series with a fuse 11 and a disconnector 21, and UC is connected in series with a fuse 11 and a disconnector 21. The voltage is introduced from a voltage taking point, passes through the fuse, passes through the isolating switch and enters the electric quantity accessory circuit board. One implementation of the circuit is shown in fig. 1.
The two isolating switches 21 are set by adopting a linked switch, are preferably arranged on the front surface of the female seat in parallel, and are opened or closed simultaneously by one action.
The electric quantity accessory 4 obtains power supply from a main circuit of a three-phase power supply bus bar, current firstly passes through the two fuses 11 and then enters the voltage acquisition circuit 41 through the two isolating switches 21 in the device, and power supply is provided for the voltage acquisition circuit 41. The electric quantity accessory 4 (the voltage acquisition circuit 41) is physically isolated from the three-phase power supply busbar main circuit of the main circuit body 3 through the series fuse module 1 and the isolating switch module 2.
When the circuit works normally, the isolating switch 21 is in a closed state, and the fuse 11 is in a working state, so that the reliability of voltage taking is ensured;
when a withstand voltage test or an insulation test is performed, the disconnecting switch 21 is placed in an off state, so that a fracture is formed, and the power accessory 4 (the voltage acquisition circuit 41) is isolated from the main circuit body 3.
When the electric quantity accessory 4 needs to be physically isolated from the main circuit in the main circuit body 3, the two isolating switches 21 of the isolating switch module 2 of the electric quantity accessory 4 are disconnected, and at the moment, the electric quantity accessory 4 or the main circuit body 3 can be operated; after the operation is completed, the two disconnectors 21 of the disconnector module 2 are closed, and the power supply to the power accessory 4 is restored. The isolating switch 21 can be conveniently disconnected in a withstand voltage test or insulation test occasion, and the isolating switch 21 can be conveniently closed in normal work.
The built-in isolated voltage-taking protection device is already applied to certain ships.
Claims (5)
1. The utility model provides a built-in isolated voltage protection device which characterized in that: the device comprises a main loop body and an electric quantity accessory which are integrated into a whole; the electric quantity accessory adopts a fuse and an isolating switch series connection power taking circuit to be connected with a voltage acquisition circuit and integrated on a female seat; the three-phase power supply main loop of the external main loop body of the electric quantity accessory gets voltage points, and fuse module and isolating switch module are connected in series between the voltage points and the voltage acquisition circuit board in sequence.
2. The built-in isolated voltage-taking protection device according to claim 1, characterized in that: the female seat is arranged on the side part of the main circuit body, and the isolating switch is arranged on the front surface of the female seat.
3. The built-in isolated voltage-taking protection device according to claim 1, characterized in that: a series circuit is respectively led out from the phase A and the phase C of the three-phase power supply, a fuse and an isolating switch are connected in series on each series circuit to form a series power-taking circuit, and the two isolating switches are arranged in parallel and are positioned on the front face of the electric quantity accessory female seat.
4. The built-in isolated voltage-taking protection device according to claim 1, characterized in that: the two isolating switches are arranged by adopting a linkage switch.
5. A power-taking method, characterized in that the built-in isolated power-taking voltage protection device of any one of the claims 1 to 4 is adopted, when in normal power-taking operation, voltage is introduced from a power-taking voltage point, an isolating switch is in a closed state, a fuse is in an operating state, and current passes through the fuse and then enters an electric quantity accessory voltage acquisition circuit after passing through the isolating switch; when a withstand voltage test or an insulation test is carried out, the isolating switch is placed in a disconnected state, the electric quantity accessory is disconnected from the main loop body, and then the electric quantity accessory or the main loop is respectively operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134810.5A CN110729730A (en) | 2019-11-19 | 2019-11-19 | Built-in isolated voltage-taking protection device and power-taking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134810.5A CN110729730A (en) | 2019-11-19 | 2019-11-19 | Built-in isolated voltage-taking protection device and power-taking method |
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| Publication Number | Publication Date |
|---|---|
| CN110729730A true CN110729730A (en) | 2020-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911134810.5A Pending CN110729730A (en) | 2019-11-19 | 2019-11-19 | Built-in isolated voltage-taking protection device and power-taking method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812495A (en) * | 2020-06-23 | 2020-10-23 | 上海电器科学研究所（集团）有限公司 | Electric quantity monitoring accessory for direct current molded case circuit breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005026105A (en) * | 2003-07-03 | 2005-01-27 | Fuji Electric Fa Components & Systems Co Ltd | Ground-fault interrupter |
| CN1953124A (en) * | 2005-10-21 | 2007-04-25 | 富士电机机器制御株式会社 | Dielectric test switch and earth leakage breaker |
| CN203055656U (en) * | 2012-12-18 | 2013-07-10 | 广东四会互感器厂有限公司 | Three-phase electromagnetic voltage transformer with disconnecting switch for geographic information system (GIS) |
| CN204615170U (en) * | 2015-03-19 | 2015-09-02 | 浙江超荣力电器有限公司 | A kind of low-voltage complete switch equipment |
-
2019
- 2019-11-19 CN CN201911134810.5A patent/CN110729730A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005026105A (en) * | 2003-07-03 | 2005-01-27 | Fuji Electric Fa Components & Systems Co Ltd | Ground-fault interrupter |
| CN1953124A (en) * | 2005-10-21 | 2007-04-25 | 富士电机机器制御株式会社 | Dielectric test switch and earth leakage breaker |
| CN203055656U (en) * | 2012-12-18 | 2013-07-10 | 广东四会互感器厂有限公司 | Three-phase electromagnetic voltage transformer with disconnecting switch for geographic information system (GIS) |
| CN204615170U (en) * | 2015-03-19 | 2015-09-02 | 浙江超荣力电器有限公司 | A kind of low-voltage complete switch equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812495A (en) * | 2020-06-23 | 2020-10-23 | 上海电器科学研究所（集团）有限公司 | Electric quantity monitoring accessory for direct current molded case circuit breaker |
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