CN201440603U - Load switch protection device - Google Patents
Load switch protection device Download PDFInfo
- Publication number
- CN201440603U CN201440603U CN2009201330268U CN200920133026U CN201440603U CN 201440603 U CN201440603 U CN 201440603U CN 2009201330268 U CN2009201330268 U CN 2009201330268U CN 200920133026 U CN200920133026 U CN 200920133026U CN 201440603 U CN201440603 U CN 201440603U
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- load switch
- protective device
- module
- primary equipment
- signal
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Abstract
The utility model discloses a load switch protection device, which comprises a fusing module, and also comprises a control module, wherein the control module is respectively connected with a load switch module and grid primary equipment, and controls the load switch module to work according to the current signal of the grid primary equipment; and the control module comprises an acquisition unit for acquiring the current signal of the grid primary equipment and a controller unit for treating the signal output by the acquisition unit. In the utility model, the control module acquires and treats load current and then outputs the control signal according to the treatment result, and the control signal controls the load switch to work to reduce the time of the load current and the waste caused by the fusing of the fuse, thereby, the operation cost of the grid primary equipment is reduced.
Description
Technical field
The utility model relates to tranformer protection circuit engineering field, particularly a kind of on-load switch protective device.
Background technology
Because transformer is subjected to the influence of external voltage in the course of work, transformer is burnt because of overload or short circuit, so need protective circuit transformer is protected it when overload occurring.
Existing transformer adopting fuse is protected transformer, by selecting suitable fuse for use, can transformer generation overload or during short circuit, and can quick fuse, disconnect overload or short-circuit loop, thereby can protect transformer.Though fuse can be protected the overload or the short circuit of transformer, when fuse is selected bigger blowout current for use, when less overload occurring, can not protect transformer for transformer.This moment, overladen electric current may produce harm to transformer.When selecting the fuse of less blowout current for use, when big electric current occurring for transformer, fuse can be protected transformer.Overload this moment electric current may be the normal overload that transformer can bear, and does not need to carry out fuse protection, therefore causes the waste of fuse, thereby increases transformer operating cost.
Therefore need a kind of on-load switch protective device, can provide protection, reduce transformer operating cost simultaneously again transformer.
The utility model content
The technical problem that the utility model mainly solves provides a kind of on-load switch protective device, can provide protection to the electrical network primary equipment, reduces electrical network primary equipment operating cost simultaneously again.
In order to address the above problem; a kind of on-load switch protective device of the utility model comprises the fusing module; by described fusing module the electrical network primary equipment is protected; described on-load switch protective device also comprises control module; described control module is connected with described electrical network primary equipment with described on-load switch module respectively; described control module is according to the work of the control of the current signal on described electrical network primary equipment on-load switch module; wherein, described control module comprises current signals unit that is used to adopt described electrical network primary equipment and the controller unit of handling according to the signal of described collecting unit output.
Preferably, described control module also comprises memory cell and input unit, and wherein, described memory cell is connected with described controller unit, is used to store Control Software and parameter; Described input unit is connected with described controller unit, is used for input inquiry or the constant value command of adjusting, and the operating current of described on-load switch protective device is made amendment.
Preferably, described control module also comprises the Tip element that is connected with described control unit, and this Tip element is pointed out the state of described protective device according to the control signal of described controller unit output.
Preferably, described collecting unit comprises current converter circuit, filter circuit, analog to digital conversion circuit, wherein, described current converter circuit is converted to voltage signal to the current signal of gathering, by described filter circuit described voltage signal is carried out Filtering Processing, analog-digital conversion circuit as described is to the analog-to-digital conversion of carrying out of the voltage signal of Filtering Processing.
Preferably, described Filtering Processing comprises low-pass filtering.
Preferably, described collecting unit also comprises amplifying circuit, and this amplifying circuit is connected in series with described filter circuit and analog to digital conversion circuit respectively, and the voltage signal of described filter circuit being handled output amplifies.
Preferably, described electrical network primary equipment comprises transformer.
The utility model provides a kind of on-load switch protective device; gather the load current signal by control module; and this current signal handled; according to result output control signal; by the work of described control signal control on-load switch, realize protection to the electrical network primary equipment, can reduce because of load current when too small; the waste that the work of fusing module causes, thereby the operating cost of reduction electrical network primary equipment.
Description of drawings
Fig. 1 is an embodiment theory diagram of the utility model on-load switch protective device;
Fig. 2 is a theory diagram of the utility model embodiment control module;
Fig. 3 is a theory diagram of the utility model embodiment collecting unit;
Fig. 4 is another theory diagram of the utility model embodiment collecting unit.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
The utility model on-load switch protective device embodiment; gather the load current signal by control module; and this current signal handled; according to result output control signal; by the work of described control signal control on-load switch, realize protection to the electrical network primary equipment, can reduce because of load current when too small; the waste that the work of fusing module causes reduces electrical network primary equipment operating cost purpose thereby reach.
As shown in Figure 1, the utility model on-load switch protective device proposes an embodiment.Described on-load switch protective device comprises fusing module 3, protect by 3 pairs of electrical network primary equipments of described fusing module, described on-load switch protective device also comprises the on-load switch module 1 and the control module 2 that is connected with described on-load switch module 1 with described fusing module 3 serial connections, described control module 2 is according to 1 work of the control of the current signal on the described electrical network primary equipment 4 on-load switch module, wherein, described control module 2 comprises: collecting unit 21, be used to gather the current signal of described electrical network primary equipment, and carry out analog-to-digital conversion, export switching signal; Controller unit 22 is connected with described collecting unit 21, and the switching signal of described collecting unit 21 outputs is handled, and the output control signal is controlled described on-load switch module 1 and opened and closed or cut-off.Described on-load switch module 1 and fusing module 3 are protected overload on the electrical network primary equipment 4 and short circuit respectively.Described fusing module 3 can be selected existing fuse for use, and the specification of fuse can be determined as required; Described on-load switch module 1 can be selected existing on-load switch for use, and electrical network primary equipment 4 is opened and closed load current or cut-offs the overload electric current.Described electrical network primary equipment 4 can be a transformer.Described controller unit 22 can be selected existing C PU (Central Process Unit, CPU) for use.
As shown in Figure 2, described control module 2 can also comprise memory cell 23, input unit 24 and Tip element 25 and power subsystem 26.Wherein, described memory cell 23 is connected with described controller unit 22, with storage Control Software and parameter; This memory cell 23 can comprise RAM and E
2PROM, described RAM and E
2PROM is connected with described controller unit 22 respectively.Described input unit 24 is connected with described controller unit 22, is used for input instruction, and the operating current of described on-load switch protective device is made amendment; This instruction can be inquired about, the definite value etc. of adjusting.Described input unit 24 can be keyboard or other entering apparatus.Described Tip element 25 can be pointed out the state of described protective device according to the control signal of described controller unit 22 outputs, and described Tip element 25 can be pointed out by LCD or acoustic luminous device.Described power subsystem 26 is respectively described controller unit 22 and collecting unit 21 provides power supply.Described power subsystem 25 can be exported three groups of direct voltages with alternating current-direct current 220V or 110V voltage transitions, promptly+3.3V+5V ,+12V.Wherein+3.3V provides working power for described controller unit 22; + 5V is described amplifying circuit power supply source; + 12V is the control relay power supply.
As shown in Figure 3, described collecting unit 21 comprises current converter circuit 211, filter circuit 212 and analog to digital conversion circuit 213.Wherein, described current converter circuit 211 is used for the current signal of gathering, the also i.e. current signal of input, and current signal changed output voltage signal; Described filter circuit 212 is connected with described current converter circuit 211, is used for described voltage signal is carried out Filtering Processing, and output is through the voltage signal of filtering, and this filter circuit 212 can be existing low-pass filter circuit; Analog-digital conversion circuit as described 213 is connected with described filter circuit 212, described voltage signal changed, and be digital signal with analog signal conversion.
As shown in Figure 4, described collecting unit 21 can also comprise amplifying circuit 214, and this amplifying circuit 214 is connected in series with described filter circuit 212 and analog to digital conversion circuit 213 respectively.When the voltage signal of wave circuit 212 Filtering Processing after filtration hour, can carry out processing and amplifying by described amplifying circuit 214, be defeated by analog-digital conversion circuit as described 213 through the voltage signal that amplifies and carry out analog-to-digital conversion process.
Specifically, by the current signal that described collecting unit 21 is gathered on the described electrical network primary equipment 4, this current signal is changed through described current converter circuit 211, converts current signal to voltage signal, and exports this voltage signal; 212 pairs of described voltage signals of described filter circuit carry out Filtering Processing, and will be defeated by described amplifying circuit 214 through the voltage signal of Filtering Processing and carry out processing and amplifying, the output amplification voltage signal.213 pairs of described amplification voltage signals of analog-digital conversion circuit as described are changed, and analog signal conversion is become digital signal.Controller unit 22 carries out calculation process according to described digital signal.
When the electric current of gathering during greater than the parameter that is arranged on described memory cell 23 in, promptly described electrical network primary equipment 4 overloads, load current may make described fusing module 3 work, and the module that promptly fuses 3 fuses.Because described controller unit 22 output control signals; controlling described on-load switch module 1 cut-offs; can protect described electrical network primary equipment 4; make the fusing module 3 that is connected in series with on-load switch module 1 can not fuse; thereby reduce the waste of fusing module 3, reduced the operating cost of electrical network primary equipment 4.
Described controller unit 22 can also be accepted through pulse signal and remote control input signal and input unit 24 input instructions, and wherein said input unit 24 can be a keyboard, and input instruction can comprise inquiry, the definite value etc. of adjusting.Wherein, described pulse signal can pass through isolation processing, for example passes through the photoelectricity isolation processing, also can be other isolation processing.When the current signal on the described electrical network primary equipment 4 during greater than the parameter that is arranged in the described memory cell 23, described controller unit 22 output control signals are controlled described on-load switch module 1 and are opened and closed or cut-off.Simultaneously, described control module 22 can also be sent corresponding position, status signal.Can also store parameters such as the current information of all collections, the process of adjusting, query script, accident, time in the described memory cell 23, and can show by LCD.Also can be by being stored in software setting current break parameter in the described memory cell 23, overload start-up parameter etc.
In the present embodiment, 12 analog to digital conversion circuits 213 and the characteristics such as filter circuit 212 can fast change, sampling deviation little, power consumption little, stability better of described collecting unit 21 by high reliability.Therefore the sampling circuit of on-load switch protective device described in the utility model does not need to adjust element and on-the-spot the adjustment, has higher reliability.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (7)
1. the on-load switch protective device comprises the fusing module, by described fusing module the electrical network primary equipment is protected, and it is characterized in that:
Described on-load switch protective device also comprises control module; described control module is connected with described electrical network primary equipment with described on-load switch module respectively; described control module is according to the work of the control of the current signal on described electrical network primary equipment on-load switch module; wherein, described control module comprises current signals unit that is used to adopt described electrical network primary equipment and the controller unit of handling according to the signal of described collecting unit output.
2. on-load switch protective device according to claim 1 is characterized in that:
Described control module also comprises memory cell and input unit, and wherein, described memory cell is connected with described controller unit, is used to store Control Software and parameter; Described input unit is connected with described controller unit, is used for input inquiry or the constant value command of adjusting, and the operating current of described on-load switch protective device is made amendment.
3. on-load switch protective device according to claim 2 is characterized in that:
Described control module also comprises the Tip element that is connected with described control unit, and this Tip element is pointed out the state of described protective device according to the control signal of described controller unit output.
4. according to the described on-load switch protective device of any claim of claim 1 to 3, it is characterized in that:
Described collecting unit comprises current converter circuit, filter circuit, analog to digital conversion circuit, wherein, described current converter circuit is converted to voltage signal to the current signal of gathering, by described filter circuit described voltage signal is carried out Filtering Processing, analog-digital conversion circuit as described is to the analog-to-digital conversion of carrying out of the voltage signal of Filtering Processing.
5. on-load switch protective device according to claim 4 is characterized in that:
Described Filtering Processing comprises low-pass filtering.
6. on-load switch protective device according to claim 5 is characterized in that:
Described collecting unit also comprises amplifying circuit, and this amplifying circuit is connected in series with described filter circuit and analog to digital conversion circuit respectively, and the voltage signal of described filter circuit being handled output amplifies.
7. on-load switch protective device according to claim 6 is characterized in that:
Described electrical network primary equipment comprises transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201330268U CN201440603U (en) | 2009-06-19 | 2009-06-19 | Load switch protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201330268U CN201440603U (en) | 2009-06-19 | 2009-06-19 | Load switch protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201440603U true CN201440603U (en) | 2010-04-21 |
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ID=42545262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201330268U Expired - Fee Related CN201440603U (en) | 2009-06-19 | 2009-06-19 | Load switch protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201440603U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471931A (en) * | 2021-06-28 | 2021-10-01 | 三一汽车制造有限公司 | Power supply loop protection device and method |
-
2009
- 2009-06-19 CN CN2009201330268U patent/CN201440603U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471931A (en) * | 2021-06-28 | 2021-10-01 | 三一汽车制造有限公司 | Power supply loop protection device and method |
| CN113471931B (en) * | 2021-06-28 | 2023-12-22 | 三一汽车制造有限公司 | Power supply loop protection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100421 Termination date: 20140619 |
|
| EXPY | Termination of patent right or utility model |