CN201436758U - Large-current surge protector piezoresistor short-circuit-resistant device - Google Patents
Large-current surge protector piezoresistor short-circuit-resistant device Download PDFInfo
- Publication number
- CN201436758U CN201436758U CN2009200727754U CN200920072775U CN201436758U CN 201436758 U CN201436758 U CN 201436758U CN 2009200727754 U CN2009200727754 U CN 2009200727754U CN 200920072775 U CN200920072775 U CN 200920072775U CN 201436758 U CN201436758 U CN 201436758U
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- piezoresistor
- surge protector
- circuit
- short
- signal processor
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Abstract
The utility model relates to a large-current surge protector piezoresistor short-circuit-resistant device, comprising a piezoresistor, and characterized in that the large-current surge protector piezoresistor short-circuit-resistant device also comprises a thermal fuse of which one end is connected with the one end of the piezoresistor; the other two ends of the thermal fuse are respectively connected with a fault indicator and a signal processor; one end of the piezoresistor is connected with a current transformer; the current transformer is connected with the signal processor; and the signal processor is connected with the remote signaling contact. The utility model has the advantages that the large-current surge protector piezoresistor short-circuit-resistant device can process the piezoresistor, and can be used safely without the need of adding the small-size breaker and fuse wire.
Description
Technical field
The utility model relates to a kind of large-discharge surge protector, relates in particular to a kind of short-circuit preventing device of voltage dependent resistor of large-discharge-current surge protector.
Background technology
The big through-current capacity product line of power supply, short circuit when preventing that piezo-resistance is invalid is generally installed fuse wire type or miniature circuit breaker at the Surge Protector front end, and their shortcomings are as follows respectively:
(1), miniature circuit breaker is installed, though intuitively find out the operating state of circuit breaker, when having determined circuit breaker work, two ends have operating voltage, thereby the residual voltage that causes protection system higher (as shown in Figure 1), therefrom U1 is a part of equipment or circuit residual voltage as can be seen; Big through-flow Surge Protector is installed in equipment/distribution front end (belonging to the unattended operation place) as another.If circuit breaker action; even Surge Protector has the telecommunication equipment function, remote signalling can not sent warning message, and the staff can not find in time that Surge Protector logs off; can not on-call maintenance or replacing Surge Protector, protection circuit or equipment timely and effectively.
Among Fig. 1: Up=U
1+ U
2
U
1: the circuit breaker operating voltage
U
2: the SPD residual voltage
Up: the residual voltage of circuit or equipment
(2) if though adopt fuse not have the residual voltage U1 of circuit breaker formation, fuse failure can not be sent the remote signalling alarm signal equally for Surge Protector.
Summary of the invention
The utility model technical issues that need to address have provided a kind of short-circuit preventing device of voltage dependent resistor of large-discharge-current surge protector, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
The utility model comprises: piezo-resistance; Also comprise: one the one hot fuse that end links to each other with an end of piezo-resistance; Two ends in addition of hot fuse also link to each other with signal processor with failure indicator respectively; One end of piezo-resistance links to each other with current transformer; Current transformer links to each other with signal processor; Signal processor links to each other with the remote signalling contact again.
Compared with prior art, the beneficial effects of the utility model are: can handle piezo-resistance, need not install additional under the situation of miniature circuit breaker and fuse, in the line safe handling.
Description of drawings
Fig. 1 is that large-discharge surge protector is installed miniature circuit breaker short-circuit preventing device schematic diagram in the prior art;
Fig. 2 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
As seen from Figure 2: the utility model comprises: piezo-resistance V; Also comprise: one the one hot fuse Ft that end links to each other with the end of piezo-resistance V; Two ends in addition of hot fuse Ft also link to each other with signal processor D with failure indicator M respectively; The end of piezo-resistance V links to each other with current transformer G; Electric current
Piezo-resistance has small leakage current and its short circuit current that very big difference is arranged when work in the utility model, sends a large amount of heats during piezo-resistance short circuit simultaneously, according to these two characteristics, in the pressure-sensitive inner above-mentioned connected mode that adopts.
Operation principle of the present utility model is as follows:
(1), signal is arranged when the heat action remote signalling of threading off;
(2), when having only current transformer that signal is arranged, the remote signalling no signal;
(3), when current transformer and hot fuse have signal simultaneously, remote signalling has signal.
Adopt structure of the present utility model to make protected equipment residual voltage less; During as pressure responsive resistor failure, in time send remote signalling, notify the operator on duty to keep in repair or change product, make equipment/circuit obtain timely and effective protection, simplified simultaneously Surge Protector installation, save engineering cost and installing space.
Claims (1)
1. a short-circuit preventing device of voltage dependent resistor of large-discharge-current surge protector comprises: piezo-resistance; It is characterized in that also comprising: one the one hot fuse that end links to each other with an end of piezo-resistance; Two ends in addition of hot fuse also link to each other with signal processor with failure indicator respectively; One end of piezo-resistance links to each other with current transformer; Current transformer links to each other with signal processor; Signal processor links to each other with the remote signalling contact again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200727754U CN201436758U (en) | 2009-05-22 | 2009-05-22 | Large-current surge protector piezoresistor short-circuit-resistant device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200727754U CN201436758U (en) | 2009-05-22 | 2009-05-22 | Large-current surge protector piezoresistor short-circuit-resistant device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201436758U true CN201436758U (en) | 2010-04-07 |
Family
ID=42373204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200727754U Expired - Lifetime CN201436758U (en) | 2009-05-22 | 2009-05-22 | Large-current surge protector piezoresistor short-circuit-resistant device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201436758U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221533A (en) * | 2021-12-14 | 2022-03-22 | 广东福德电子有限公司 | Transient spike voltage absorption circuit of circuit breaker and detection method |
-
2009
- 2009-05-22 CN CN2009200727754U patent/CN201436758U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114221533A (en) * | 2021-12-14 | 2022-03-22 | 广东福德电子有限公司 | Transient spike voltage absorption circuit of circuit breaker and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100407 |
|
| CX01 | Expiry of patent term |