CN211127093U - Relay protection circuit - Google Patents
Relay protection circuit Download PDFInfo
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- CN211127093U CN211127093U CN202020191447.2U CN202020191447U CN211127093U CN 211127093 U CN211127093 U CN 211127093U CN 202020191447 U CN202020191447 U CN 202020191447U CN 211127093 U CN211127093 U CN 211127093U
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- 238000011897 real-time detection Methods 0.000 abstract description 5
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Abstract
The utility model discloses a relay protection circuit includes CPU, power module, memory and communication module pass through bus and CPU line connection, line connection has input/output module and exchanges plug-in components on the bus, input/output module is connected with the voltage comparator. In this way, the utility model discloses but real-time detection in time sends alarm signal, plays good protection to conveying circuit.
Description
Technical Field
The utility model belongs to the technical field of the power transmission technology and specifically relates to a relay protection circuit is related to.
Background
The relay protection is an important measure for detecting faults or abnormal conditions occurring in the power system so as to send out alarm signals or directly isolate and remove fault parts. In the existing power system, a relay is usually connected into a circuit, and a corresponding circuit is connected or disconnected by using the action of a normally open or normally closed auxiliary contact when a coil of the relay is electrified or powered off, so that a certain protection function is achieved. The common tripping relay that has is often used for alternating current filter protection screen and direct current protection interface screen, and when relay protection moved, the protection screen was through closing tripping relay excitation coil, and then closed next-level circuit breaker trip coil, finally made the circuit breaker trip. The protection mode of the tripping relay can be used for indicating the tripping position of the circuit breaker, prompting people on the on-off condition of a circuit in a power system, and playing a certain protection function. However, in a complex power system, the operation line is complex, and there are many positions where faults occur, so that it is necessary to provide a relay protection circuit capable of satisfying real-time detection and timely sending out an alarm signal.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing a relay protection circuit, but real-time detection and in time send alarm signal, play good protection to transmission circuit.
In order to solve the technical problem, the utility model provides a technical scheme is: the utility model provides a relay protection circuit, includes CPU, power module, memory and communication module pass through bus and CPU line connection, line connection has input/output module and exchanges plug-in components on the bus, input/output module is connected with the voltage comparator.
The above technical scheme is adopted in the utility model, the voltage comparator is arranged in connecting on waiting to measure the circuit in conveying circuit, through the voltage change in the comparison circuit and carry this comparison result to the input/output module in, CPU is arranged in handling the signal of the voltage comparator that receives in the input/output module to make the response from the output interface output feedback signal of input/output module, play good real-time detection and protection effect to conveying circuit.
In the relay protection circuit, the power module comprises the switching power supply and the filter, the filter is electrically connected with the switching power supply, and the switching power supply is provided with the first power interface and the second power interface which are respectively electrically connected with the CPU and the input and output module.
In the relay protection circuit, the alternating current plug-in is connected with the CPU after being filtered and rectified by the low-pass filter, the line switcher, the operational amplifier and the alternating current-direct current converter in sequence.
In the relay protection circuit, the output interface of the input/output module is connected with the alarm relay, the trip position relay, the outlet loop relay, the signal relay and the signal reset relay.
In the relay protection circuit, the CPU is connected to the data input device and the signal display device through bus signals.
The utility model discloses the beneficial effect who gains is: the utility model discloses but the running state of real-time detection power supply line can make correspondingly according to the information CPU who detects, and corresponding signal and action are presented in time in the feedback, have played the good protection effect to the power supply line.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a power module according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an ac card according to an embodiment of the present invention.
Description of reference numerals: 1-CPU, 2-power module, 3-memory, 4-communication module, 5-bus, 6-input/output module, 7-AC plug-in, 8-voltage comparator, 11-data input device, 12-signal display device, 21-switch power supply, 22-filter, 23-first power interface, 24-second power interface, 61-alarm relay, 62-trip position relay, 63-outlet loop relay, 64-signal relay, 65-signal reset relay, 71-low-pass filter, 72-circuit switcher, 73-operational amplifier, 74-AC/DC converter.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, the relay protection circuit includes a CPU1, a power module 2, a memory 3, and a communication module 4, where the power module 2, the memory 3, and the communication module 4 are connected to a CPU1 via a bus 5, an input/output module 6 and an ac plug-in 7 are connected to the bus 5 via a line, and the input/output module 6 is connected to a voltage comparator 8. It should be understood that, in the implementation process, the ac plug 7 may be used to input a voltage signal and a current signal in the circuit, and the CPU compares the voltage signal and the current signal input by the ac plug 7, and responds when an abnormality is found and outputs a feedback signal from the input/output module 6. The voltage comparator 8 is connected in the circuit, and compares the voltage value of the detection end with the set value of the comparator, so as to judge whether the circuit operates normally and feed back the circuit to the CPU1 through the input and output module 6. The memory 3 enables the CPU to have data processing and recording capabilities, and can implement various complicated fault handling schemes and record a large amount of fault data.
Referring to fig. 2, the power module 2 includes a switching power supply 21 and a filter 22, the filter 22 is electrically connected to the switching power supply 21, and the switching power supply 21 is provided with a first power interface 23 and a second power interface 24 which are electrically connected to the CPU1 and the input/output module 6, respectively. The first power interface 23 outputs a voltage value of +5V for the CPU operating power supply, and the second power interface 24 outputs a voltage value of +24V for the power supply for driving the relay.
Referring to fig. 3, ac card 7 is connected to CPU1 after being rectified and filtered by low pass filter 71, line switcher 72, operational amplifier 73, and ac/dc converter 74 in this order.
Further, an alarm relay 61, a trip position relay 62, an outlet loop relay 63, a signal relay 64, and a signal reset relay 65 are connected to the output interface of the input/output module 6. It should be understood that the alarm relay 61, the trip position relay 62, the outlet loop relay 63, the signal relay 64 and the signal reset relay 65 can be used for receiving corresponding signals output by the input and output module 6, and are connected with corresponding indicating lamps, buzzers and other devices through contacts thereof so as to prompt the conditions occurring in the circuit.
The CPU1 is signally connected to a data input device 11 and a signal display device 12 via a bus 5. The data input device 11 is a keyboard and may be used to set parameters for the CPU 1. The signal display device 12 may be a liquid crystal display for displaying the results of the processing in the CPU1 and the circuit operation.
In summary, the present invention has been made to practical samples according to the description and the drawings, and after a plurality of use tests, the utility model can be proved to achieve the expected purpose, and the practical value is undoubted. The above-mentioned embodiments are only used to conveniently illustrate the present invention, and are not to the limit of the present invention in any form, and any person who knows commonly in the technical field has, if not in the scope of the technical features of the present invention, utilize the present invention to make the equivalent embodiment of local change or modification, and not to break away from the technical features of the present invention, and all still belong to the technical features of the present invention.
Claims (5)
1. A kind of relay protection circuit, characterized by: include CPU (1), power module (2), memory (3) and communication module (4) are through bus (5) and CPU (1) line connection, line connection has input/output module (6) and exchanges plug-in components (7) on bus (5), input/output module (6) are connected with voltage comparator (8).
2. The relay protection circuit according to claim 1, wherein: the power module (2) comprises a switching power supply (21) and a filter (22), the filter (22) is electrically connected with the switching power supply (21), and the switching power supply (21) is provided with a first power interface (23) and a second power interface (24) which are respectively electrically connected with the CPU (1) and the input and output module (6).
3. The relay protection circuit according to claim 1, wherein: the alternating current plug-in (7) is connected with the CPU (1) after being filtered and rectified by the low-pass filter (71), the line switcher (72), the operational amplifier (73) and the alternating current-direct current converter (74) in sequence.
4. The relay protection circuit according to claim 2, wherein: the output interface of the input/output module (6) is connected with an alarm relay (61), a tripping position relay (62), an outlet loop relay (63), a signal relay (64) and a signal reset relay (65).
5. The relay protection circuit according to claim 2, wherein: the CPU (1) is in signal connection with a data input device (11) and a signal display device (12) through a bus (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020191447.2U CN211127093U (en) | 2020-02-20 | 2020-02-20 | Relay protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020191447.2U CN211127093U (en) | 2020-02-20 | 2020-02-20 | Relay protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211127093U true CN211127093U (en) | 2020-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020191447.2U Active CN211127093U (en) | 2020-02-20 | 2020-02-20 | Relay protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211127093U (en) |
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2020
- 2020-02-20 CN CN202020191447.2U patent/CN211127093U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: Room 1206, Building 8, Huanyu Huijin Center, No. 428, Nancheng Section, Dongguan Avenue, Nancheng Street, Dongguan City, Guangdong Province, 523000 Patentee after: Guangdong tengna Intelligent Technology Co.,Ltd. Country or region after: China Address before: Room 206, Building 2, No. 5 Baima Huangjin 1st Road, Nancheng Street, Dongguan City, Guangdong Province, 523000 Patentee before: Guangdong tengna Intelligent Technology Co.,Ltd. Country or region before: China |