CN215415580U - Leakage early warning and circuit breaker - Google Patents
Leakage early warning and circuit breaker Download PDFInfo
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- CN215415580U CN215415580U CN202121199837.5U CN202121199837U CN215415580U CN 215415580 U CN215415580 U CN 215415580U CN 202121199837 U CN202121199837 U CN 202121199837U CN 215415580 U CN215415580 U CN 215415580U
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Abstract
The utility model discloses and provides an electric leakage early warning and circuit breaker suitable for an IT power supply system, which comprises a current detection device, an audible and visual alarm device, a CPU component, an isolation step-down module, a circuit breaker and a bidirectional thyristor, wherein the current detection device is a single-phase or three-phase Hall current sensor, the current detection device is arranged on a power line, the input end of the isolation step-down module is connected with a power supply, the circuit breaker comprises a tripping coil, the output end of the isolation step-down module is connected with the CPU component, the current detection device, the audible and visual alarm device, the circuit breaker and the bidirectional thyristor are all connected with the CPU component, and the tripping coil of the circuit breaker is connected with the power supply through the bidirectional thyristor. The utility model is used in the technical field of electric leakage safety detection.
Description
Technical Field
The utility model relates to an electric leakage early warning and circuit breaker, in particular to an electric leakage early warning and circuit breaker suitable for an IT power supply system.
Background
The first requirement of people on a power grid power supply system is safety, the measures for ensuring the safety are firstly to prevent electric leakage, electric shock and electric accidents, much effort is made for people for many years, the existing power grid power supply system is improved and improved greatly, but the existing power grid power supply system is not better, and the improvement, sound guarantee and optimization of the power grid power supply system are still continuously improved at present when the scientific technology is continuously improved.
An insulation resistance detector IMD can only be used in the IT power supply system, the detection current is very small, and a general leakage switch cannot detect the current, so that the leakage switch for detecting the current cannot be used in the IT power supply system. Leading to the inability to spread more widely high-security IT power supply systems.
In the low-voltage power system, since the live line is at a high potential, the live line is discharged to the ground through a capacitor or an insulating resistor, which is collectively referred to as natural leakage. The current of natural leakage can increase along with the damage of the length and the insulation of the electric wire, the current value of the natural leakage is basically unchanged after the system construction is completed, but the current value can seriously affect the performance of the leakage switch. For example: the natural current value reaches 20mA, and the reaction current value is only 10mA by using a leakage switch of 30 mA. If 20mA leakage current exists outside, namely the total leakage current can become 40mA, the leakage current switch is tripped to cause the condition of false triggering, and the production is seriously influenced.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the electric leakage early warning and circuit breaker suitable for the IT power supply system.
The technical scheme adopted by the utility model is as follows: an electric leakage early warning and circuit breaker suitable for an IT power supply system.
Electric leakage early warning and circuit breaker include current detection device, audible and visual alarm device, CPU subassembly, isolation step-down module, circuit breaker, bidirectional thyristor, current detection device is single-phase or three-phase hall current sensor, current detection device sets up on the power cord, the input of isolation step-down module is connected, the circuit breaker includes trip coil, the output of isolation step-down module is connected the CPU subassembly, current detection device audible and visual alarm device the circuit breaker bidirectional thyristor all with the CPU subassembly is connected, the trip coil of circuit breaker passes through bidirectional thyristor is connected with the power.
Furthermore, the power supply is a three-phase power supply, and the input end of the isolation voltage reduction module is connected with two phases of the three-phase power supply to provide electric energy for the CPU component.
Furthermore, the CPU component is electrically connected with a leakage circuit detection unit in the current detection device, the CPU component is connected with a control electrode of the bidirectional controllable silicon, one end of a tripping coil of the circuit breaker is connected with a first anode of the bidirectional controllable silicon, a second anode of the bidirectional controllable silicon is connected with one phase of the power supply, the other end of the tripping coil of the circuit breaker is connected with the other phase of the power supply, and the CPU component is connected with the tripping coil of the circuit breaker in series and is connected with the other phase of the three-phase power supply.
Further, when a detection circuit formed by connecting the CPU assembly and the current detection device detects that the leakage current is larger than 5mA, the CPU assembly controls the audible and visual alarm device to give an alarm, and when the leakage time reaches a certain time or the leakage current is larger than 12mA, the CPU assembly outputs a tripping signal to a control electrode of the bidirectional triode thyristor, and the circuit breaker trips and is powered off.
The utility model has the beneficial effects that: the leakage early warning and circuit breaker comprises a current detection device, an acousto-optic alarm device, a CPU component, an isolation step-down module, a circuit breaker and a bidirectional thyristor, wherein the current detection device is a single-phase or three-phase Hall current sensor, the current detection device is arranged on a power line, the input end of the isolation step-down module is connected with a power supply, the circuit breaker comprises a tripping coil, the output end of the isolation step-down module is connected with the CPU component, the current detection device, the acousto-optic alarm device, the circuit breaker and the bidirectional thyristor are all connected with the CPU component, and the tripping coil of the circuit breaker is connected with the power supply through the bidirectional thyristor. When a detection circuit formed by connecting the CPU assembly and the current detection device detects that the leakage current is larger than 5mA, the CPU assembly controls the audible and visual alarm device to give an alarm, and outputs a tripping signal to a control electrode of the bidirectional thyristor after the leakage time reaches a certain time or the leakage current is larger than 12mA, and the circuit breaker trips to cut off the power. Therefore, the utility model can warn and automatically deal with the power supply system in real time when electric leakage, electric shock and electric accidents happen, and can give an early warning to prompt manual treatment when the faults happen, thereby effectively avoiding the expansion and severity of the accidents, avoiding sudden power failure and ensuring the personal and property safety.
Drawings
Fig. 1 is a schematic diagram of the circuit principle structure of the present invention.
Detailed Description
As shown in fig. 1, the present invention operates in a power supply system, working together with a three-phase power supply, a transmission line, a load switch and a load, the electric leakage early warning and circuit breaker comprises a current detection device 1, an audible and visual alarm device 2, a CPU component 3, an isolation voltage reduction module 4, a circuit breaker 5 and a bidirectional thyristor 6, the current detection device 1 is a single-phase or three-phase Hall current sensor, the current detection device 1 is arranged on a power line, the input end of the isolation voltage reduction module 4 is connected with a power supply, the circuit breaker 5 comprises a trip coil, the output end of the isolation voltage reduction module 4 is connected with the CPU component 3, the current detection device 1, the audible and visual alarm device 2, the circuit breaker 5 and the bidirectional thyristor 6 are all connected with the CPU component 3, and a tripping coil of the circuit breaker 5 is connected with a power supply through the bidirectional thyristor 6.
In this embodiment, the power supply is a three-phase power supply, and the input end of the isolation step-down module 4 is connected to two phases of the three-phase power supply to provide electric energy for the CPU component 3.
In this embodiment, the CPU component 3 is electrically connected to the leakage circuit detecting unit in the current detecting device 1, the CPU component 3 is connected to the control electrode of the triac 6, one end of the trip coil of the circuit breaker 5 is connected to the first anode of the triac 6, the second anode of the triac 6 is connected to one of the phases of the power supply, the other end of the trip coil of the circuit breaker 5 is connected to the other phase of the power supply, and the CPU component 3 is connected in series to the trip coil of the circuit breaker and connected to the other phase of the three-phase power supply.
In this embodiment, when the detection circuit formed by connecting the CPU component 3 and the current detection device 1 detects that the leakage current is greater than 5mA, the CPU component 3 controls the audible and visual alarm device 2 to send out an alarm, and when the leakage time reaches a certain time or the leakage current is greater than 12mA, the CPU component 3 outputs a trip signal to the control electrode of the bidirectional thyristor 6 to further turn on the trip coil, and at this time, the circuit breaker 5 trips and is powered off.
In the embodiment, when the leakage current in the power supply system is more than 5mA, the power supply system is a fault, sound and light alarm is started, alarm can be relieved when faults are eliminated within set time, and the circuit breaker tripping coil is driven to trip and power off immediately when the faults are eliminated overtime or the current exceeds 12 mA.
Compared with the traditional leakage switch, the embodiment has the following innovative functions: 1. the functions of sound-light alarm and delayed tripping are added, operators are given enough time to handle the leakage situation, the occurrence of false triggering is avoided, and the influence of the false triggering on the outage of life production is reduced. 2. In an IT system with a zero line led out, if the zero line and a ground wire have serious faults and a corresponding protection system fails, the electric leakage early warning and the 12 milliampere instant tripping function of the circuit breaker can still continue to protect the life safety. 3. The current value which can be detected is 5mA, so that the IT system can also use a current detection method to identify the position of electric leakage. IT system with higher safety is more easily popularized. 4. Because can not trip at once, electric leakage early warning and circuit breaker self-bring innovative self-checking function can regularly detect oneself, remind the operating condition of user electric leakage early warning and circuit breaker, avoid electric leakage early warning and circuit breaker inefficacy hidden danger of bringing. 5. The utility model can enable the IT system to use current detection, and the IT system with higher safety is easier to popularize.
Claims (4)
1. The utility model provides a electric leakage early warning and circuit breaker which characterized in that: the electric leakage early warning and circuit breaker comprises a current detection device (1), an audible and visual alarm device (2), a CPU component (3), an isolation voltage reduction module (4), a circuit breaker (5) and a bidirectional thyristor (6), the current detection device (1) is a single-phase or three-phase Hall current sensor, the current detection device (1) is arranged on a power line, the input end of the isolation voltage reduction module (4) is connected with a power supply, the circuit breaker (5) comprises a trip coil, the output end of the isolation voltage reduction module (4) is connected with the CPU component (3), the current detection device (1), the sound and light alarm device (2), the circuit breaker (5) and the bidirectional controllable silicon (6) are all connected with the CPU component (3), and a tripping coil of the circuit breaker (5) is connected with a power supply through the bidirectional thyristor (6).
2. An electric leakage warning and circuit breaker as claimed in claim 1, wherein: the power supply is a three-phase power supply, and the input end of the isolation voltage reduction module (4) is connected with two phases of the three-phase power supply to provide electric energy for the CPU component (3).
3. An electric leakage warning and circuit breaker as claimed in claim 2, wherein: the CPU component (3) is electrically connected with a leakage circuit detection unit in the current detection device (1), the CPU component (3) is connected with a control electrode of the bidirectional controllable silicon (6), one end of a tripping coil of the circuit breaker (5) is connected with a first anode of the bidirectional controllable silicon (6), a second anode of the bidirectional controllable silicon (6) is connected with one phase of the power supply, the other end of the tripping coil of the circuit breaker (5) is connected with the other phase of the power supply, and the CPU component (3) is connected with the tripping coil of the circuit breaker in series and is connected with the other phase of the three-phase power supply.
4. A leakage warning and circuit breaker as claimed in claim 3, wherein: when a detection circuit formed by connecting the CPU component (3) and the current detection device (1) detects that the leakage current is greater than 5mA, the CPU component (3) controls the audible and visual alarm device (2) to give an alarm, the CPU component (3) outputs a tripping signal to a control electrode of the bidirectional thyristor (6) after the leakage time reaches a certain time or the leakage current is greater than 12mA, and the circuit breaker (5) trips to cut off the power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121199837.5U CN215415580U (en) | 2021-06-01 | 2021-06-01 | Leakage early warning and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121199837.5U CN215415580U (en) | 2021-06-01 | 2021-06-01 | Leakage early warning and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215415580U true CN215415580U (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121199837.5U Active CN215415580U (en) | 2021-06-01 | 2021-06-01 | Leakage early warning and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215415580U (en) |
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2021
- 2021-06-01 CN CN202121199837.5U patent/CN215415580U/en active Active
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