CN206452094U - Cross undervoltage intelligence from restoring to throne protection device - Google Patents

Abstract

The embodiment of the utility model discloses cross undervoltage intelligence from restoring to throne protection device, solved under the current situation excessive pressure, under-voltage and decompression throw instability certainly, demolish behind the decompression protection because the low-voltage circuit breaker of all circuits all keeps closed, all user equipment will start simultaneously, starting current is very big, arouse the instantaneous overload of circuit easily, very unfavorable and not demolish the decompression protection circuit breaker to electric wire netting safe operation, it is big to need manual combined floodgate work volume when the unit of operation resumes the power supply, the slow problem of speed. The embodiment of the utility model provides an include: the detection module is provided with a voltage acquisition circuit and a lamp display circuit; the control module is provided with a voltage analyzing circuit, an optical coupling matching circuit, a protection circuit and a high-power output circuit; the control module comprises a detection module, the detection module detects the voltage state of the line, and the control module carries out self-resetting operation of power cut and power transmission.

Description

An intelligent self-recovery protection device for overvoltage and undervoltage

technical field

The utility model relates to the field of circuit intelligent control and protection, in particular to an intelligent self-recovery protection device for overvoltage, undervoltage and loss of voltage.

Background technique

Generally speaking, the voltage on the power supply line is not a constant value, and it may fluctuate correspondingly due to the change of the load. Once this voltage fluctuation (such as undervoltage or overvoltage) on the power supply line exceeds the range that the electrical equipment can withstand, it will have an adverse effect on the electrical equipment, or even cause damage to the electrical equipment. Therefore, undervoltage protection or overvoltage protection devices are usually used to ensure that the electrical equipment is used in a normal power supply state.

At present, there are few intelligent protection cabinets for overvoltage, undervoltage and loss of voltage in the market, and their structures are simple. They are mainly composed of transfer switches, intermediate relays and time relays. Either they are not in good contact or cannot be switched on for a long time. state, resulting in oscillation and burning of the closing coil, which may even lead to abnormal power consumption or major power accidents.

Utility model content

The embodiment of the utility model discloses an overvoltage and undervoltage intelligent self-recovery protection device, which is used to solve the instability of overvoltage, undervoltage and loss of voltage self-injection under the existing conditions, and the low voltage disconnection of all lines after the loss of voltage protection is removed. If the circuit breakers are kept closed, all user equipment will start at the same time. The starting current is very large, which will easily cause instantaneous overload of the line, which is extremely unfavorable to the safe operation of the power grid. If the voltage loss protection circuit breaker is not removed, the operating unit needs to manually close the switch when the power supply is restored. , The problem of slow speed.

The embodiment of the utility model provides an overvoltage and undervoltage intelligent self-recovery protection device, including:

The detection module has a voltage acquisition circuit and a light display circuit;

Control module, with analysis voltage, optocoupler matching, protection and high-power output circuit;

The control module includes a detection module, and the detection module detects the state of the line voltage, and implements the stop and power transmission self-recovery operation through the control module.

Optionally, a rectification circuit composed of three transformers and corresponding DC conversion circuits is provided in the over-undervoltage intelligent self-recovery protection device to supply power to the circuits of the detection module and the control module.

Optionally, the light display circuit specifically includes:

The single-chip patch 8S003F3Pb, indicator light, chip 7S33, and 1n4007 are electrically connected in sequence.

Optionally, the control module specifically includes:

The control module has analysis of each voltage circuit, optocoupler connection, protection and high-power relay output circuit;

The detection module in the control module, the optocoupler P521, the integrated chip AT89C2051, and the integrated chip 74SL14 are electrically connected in sequence.

Optionally, the control module specifically includes:

The detection module in the control module is also electrically connected with the 7812 protection voltage stabilization circuit and the 7805 protection voltage stabilization circuit.

Optionally, the control module specifically includes:

The control module also has a light-emitting tube display drive circuit electrically connected to the control chip.

Optionally, include:

The overvoltage and undervoltage intelligent self-recovery protection device is provided with a luminescent tube connected to the luminescent tube display drive circuit for indicating the working state of the device.

Optionally, include:

The overvoltage and undervoltage intelligent self-recovery protection device is provided with a double dial switch connected with the drive circuit of the control module for setting the time.

Optionally, include:

The control module is connected with a high-power electromagnetic relay through a drive circuit.

Optionally, include:

The N-line connector, A-phase connector, B-phase connector, and C-phase connector connected to the control module are also provided on the over-voltage and under-voltage intelligent self-recovery protection device;

The over-undervoltage intelligent self-recovery protection device is also provided with active branching and closing joints and switch auxiliary contact access points connected to the rectification circuit.

As can be seen from the above technical solutions, the utility model embodiment has the following advantages:

The embodiment of the utility model provides an over-undervoltage intelligent self-recovery protection device, including: a detection module with a voltage acquisition circuit and a light display circuit; a control module with an analysis voltage, optocoupler connection, protection and high-power output circuit ;The control module includes a detection module, which detects the state of the line voltage, and implements the self-recovery operation of stop and power transmission through the control module, which solves the problem of overvoltage, undervoltage and loss of voltage self-switching instability and dismantling failure under the existing conditions. After overvoltage protection, because the low-voltage circuit breakers of all lines remain closed, all user equipment will start at the same time, and the starting current is large, which may easily cause instantaneous overload of the line, which is extremely unfavorable to the safe operation of the power grid. When power supply needs to be manually closed, the workload is heavy and the speed is slow.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a schematic diagram of the detection module circuit principle of the technical device of the present invention.

Fig. 2 is a schematic diagram of the circuit principle of the control module of the technical device of the present invention.

Fig. 3 is a schematic diagram of the connection between the technical device of the present invention and the application embodiment of the power supply equipment.

Illustration, IO1～IO3-input/output interface, D1-rectifier, D3-rectifier, D5-rectifier, D2-diode, D4-diode, D6-diode, 7812-integrated protection circuit chip, 7805-integrated Protection circuit chip, C1～C16-capacitor, R1～R3-resistor, 8S003F3Pb-single chip, 1A-chip, 7S33-chip, 1n4007-rectifier diode, IC1-integrated chip AT89C2051, IC2-integrated chip 74SL14, 1 -Integrated circuit chip 7812 interface, 2-Integrated circuit chip 7812 ground port, 3-Integrated circuit chip 7812 interface, 4-Integrated circuit chip 7805 interface, 5-Control module, Q1-Switch device, Q2-Switch device, QF-Open circuit Device, ZJ1～ZJ2 intermediate relay, TA-current transformer, HA-button, A611-transformer, B611-transformer, C611-transformer, Qd-single board position electric shock.

detailed description

The embodiment of the utility model discloses an overvoltage and undervoltage intelligent self-recovery protection device, which is used to solve the instability of overvoltage, undervoltage and loss of voltage self-injection under the existing conditions, and the low voltage disconnection of all lines after the loss of voltage protection is removed. If the circuit breakers are kept closed, all user equipment will start at the same time. The starting current is very large, which will easily cause instantaneous overload of the line, which is extremely unfavorable to the safe operation of the power grid. If the voltage loss protection circuit breaker is not removed, the operating unit needs to manually close the switch when the power supply is restored. , The problem of slow speed.

Referring to Fig. 1 and Fig. 2, an embodiment of a kind provided in the embodiment of the utility model includes:

The detection module has a voltage acquisition circuit and a light display circuit;

Control module, with analysis voltage, optocoupler matching, protection and high-power output circuit;

The control module includes a detection module, and the detection module detects the state of the line voltage, and implements the stop and power transmission self-recovery operation through the control module.

Furthermore, a rectification circuit composed of three transformers and corresponding DC conversion circuits is provided in the over-voltage and under-voltage intelligent self-recovery protection device to supply power to the circuits of the detection module and the control module.

Further, the light display circuit specifically includes:

The 8S003F3Pb single-chip chip, the indicator light, the chip 7S33, and the 1n4007 rectifier diode are electrically connected in sequence.

Further, the control module specifically includes:

The control module has analysis of each voltage circuit, optocoupler connection, protection and high-power relay output circuit;

The detection module in the control module, the P521 optocoupler, the AT89C2051 integrated chip, and the 74SL14 integrated chip are electrically connected in sequence.

Further, the control module specifically includes:

The detection module in the control module is also electrically connected with the 7812 integrated protection circuit chip and the 7805 integrated protection circuit chip.

Further, the control module specifically includes:

The control module also has a light-emitting tube display drive circuit electrically connected to the control chip.

Further, include:

The overvoltage and undervoltage intelligent self-recovery protection device is provided with a luminescent tube connected to the luminescent tube display drive circuit for indicating the working state of the device.

Further, include:

The overvoltage and undervoltage intelligent self-recovery protection device is provided with a double dial switch connected with the drive circuit of the control module for setting the time.

Further, include:

The control module is connected with a high-power electromagnetic relay through a drive circuit.

Further, include:

The N-line connector, A-phase connector, B-phase connector, and C-phase connector connected to the control module are also provided on the over-voltage and under-voltage intelligent self-recovery protection device;

The over-undervoltage intelligent self-recovery protection device is also provided with active branching and closing joints and switch auxiliary contact access points connected to the rectification circuit.

Among them, three detection modules and one control module are arranged in the casing of the overvoltage and undervoltage intelligent self-recovery protection device, and the detection module has a voltage collection, setting and light display circuit for each phase.

Please refer to Figure 1, the three detection modules are composed of electronic components such as model ST single-chip SMD 8S003F3Pb, chip 7S33 and SMD 1A. Please refer to Figure 1 for the six indicator lights used to indicate the status of the power signal.

Please refer to Figure 2, the control module has an analysis of each voltage circuit, optocoupler connection, protection and high-power relay output circuit, a light-emitting tube display drive circuit connected to the control chip, and a light-emitting tube display module connected to the control chip.

The control module is composed of electronic devices whose model is AT89C2051 integrated chip and 74SL14 integrated chip. It is also equipped with two rectifier circuits that supply power to the above two integrated chips. There is a double dial switch connected with the drive circuit for setting the time, and there are also two or several light-emitting tubes connected with the display module on the housing to indicate the working status of the device. The control module passes The driving circuit is connected with two high-power electromagnetic relays. There is also a rectifier circuit that provides the working voltage for the above-mentioned circuit in the housing. The rectifier circuit is composed of 3 transformers and the corresponding DC conversion circuit. The housing is also equipped with the following The external interface connecting the control module and the rectifier circuit: N-line connector, A-phase connector, B-phase connector, C-phase connector, active branching and closing connectors, and switch auxiliary contact access points. As shown in FIG. 3 , it is a schematic diagram of connection between the device and the application implementation of the power supply equipment.

Each contact in the device takes N, A, B, C phase voltage respectively, and the phase voltage is 0~220V. The button corresponds to the closing and opening positions. The green, red and blue lights indicate that the switch is in the opening, closing and protection positions. The red light of the detection module indicates that there is a power signal and the power supply is normal. The red and blue lights of the detection module are all on to indicate that the power signal is on Within the normal range; the green light of the control module indicates that the switch is in the opening position, the red light indicates that the switch is in the closing position, the power supply is normal, and the automatic air switch is in the working position; the blue light indicates that the device enters the protection position, the power supply is normal, and whether it is a line device If there is a fault, it is necessary to maintain the peripheral lines or equipment, disconnect the power supply of this device and reclose it. The closing time of this device is adjustable (5-10-15S), set by the dial switch, and it is 5S at the same time. , 1 up and 2 down is 10S, 1 down and 2 up is 15S; the power-off delay of this device is 3S, if the time is exceeded, it is confirmed as no power opening, and the number of closing times is one time (can be preset), this device can realize power transmission and power-off automatic operation.

This embodiment provides an over-undervoltage intelligent self-recovery protection device, including: a housing, and the housing specifically includes: a detection module 5 with a voltage acquisition and setting circuit; a control module with an analysis voltage, an optocoupler Matching, protection and high-power output circuits; the detection module is electrically connected to the control module, the detection module detects the line voltage state, and the control module implements stop and power transmission self-recovery operations, which solves the problem of overvoltage and undervoltage under existing conditions. Since the low-voltage circuit breakers of all lines remain closed after the loss of voltage protection is removed, all user equipment will start at the same time, and the starting current is very large, which may easily cause instantaneous overload of the line, which is extremely unfavorable to the safe operation of the power grid. And there is no removal of the loss of voltage protection circuit breaker, and the operating unit needs to manually close the switch when the power supply is restored, with a large workload and slow speed.

An embodiment of the specific application process of an over-undervoltage intelligent self-recovery protection device provided by the embodiment of the utility model includes:

This device can realize the following automatic operation process of power transmission and power failure:

Power transmission automatic operation:

The high-voltage drop switch is powered or the high-voltage load cabinet, circuit breaker cabinet and low-voltage knife switch are closed or the knife switch is in the closed position, that is, the three-phase A, B, and C are live.

The first and second phases of A are energized or transmitted at the same time to ensure the voltage of the circuit breaker controller and the voltage of the voltage loss circuit. After the device confirms that A, B, and C are charged, and there is no overvoltage or undervoltage, the device sends a closing signal within 5-15 seconds (adjustable), and the closing contact controls the voltage through phase A to close the circuit breaker. When overvoltage, undervoltage or loss of voltage is detected in any phase of A, B and C, the microprocessor waits and does not act.

The first and second power-on or simultaneous power-on of phase B, device collection and analysis, photoelectric coupling, micro-processing analysis and processing, when A and C are the same, there is power, and the same detection and processing, after a 3-second delay, the device confirms A After , B, and C are charged, and there is no overvoltage or undervoltage, the device will send a closing signal within 5-15 seconds (adjustable), and the closing contact will control the voltage through phase A to close the circuit breaker. When overvoltage, undervoltage or loss of voltage is detected in any phase of A, B and C, the microprocessor waits and does not act.

Phase C is energized at the end or at the same time, device acquisition and analysis, photoelectric coupling, micro-processing analysis and processing, when A and B are the same, there is power, and the same detection and processing, after a 3-second delay, the device confirms A, B, C After all are electrified, and there is no overvoltage or undervoltage, the device sends a closing signal within 5-15 seconds (adjustable), and the closing contact controls the voltage through phase A to close the circuit breaker. When overvoltage, undervoltage or loss of voltage is detected in any phase of A, B and C, the microprocessor waits and does not act.

Automatic power failure operation:

When the high-voltage drop switch of phase A falls or the cable and knife switch are not closed normally, the voltage of phase A is not (0V loss of voltage), less than 15% of the rated voltage (undervoltage below 185V---adjustable) and higher than the rated voltage In the case of 10% (overvoltage above 245V---adjustable), if there is no voltage (0V loss of voltage), the loss of voltage release will operate, and the circuit breaker switch will open; After a delay of 3 seconds (guaranteed lightning strike or instantaneous voltage loss misoperation), an opening signal is sent out, and the high-power electromagnetic relay acts to open the gate, and correspondingly illuminates to indicate that the circuit breaker is opened. If the phase A voltage returns to normal, the device will automatically send a closing signal and close the circuit breaker within 5-15 seconds (adjustable).

When the B-phase high-voltage drop switch is dropped or the cable and knife switch are not closed normally, the B-phase voltage is not (0V loss of voltage), less than 15% of the rated voltage (undervoltage below 185V---adjustable) and higher than the rated voltage In the case of 10% (overvoltage above 245V---adjustable), when the device collects B voltage loss, overvoltage and undervoltage, the microprocessor analyzes the time delay of 3 seconds (guaranteed lightning strike or instantaneous loss of voltage misoperation) ) after the opening signal is sent, the high-power electromagnetic relay acts to open the gate, and the corresponding light indicates that the circuit breaker is opened. If the phase B voltage returns to normal, the device will automatically send a closing signal and close the circuit breaker within 5-15 seconds (adjustable).

When the C-phase high-voltage drop switch is dropped or the cable and knife switch are not closed normally, the C-phase voltage is not (0V loss of voltage), less than 15% of the rated voltage (undervoltage below 185V --- adjustable) and higher than the rated voltage In the case of 10% (overvoltage above 245V---adjustable), when the device collects C voltage loss, overvoltage and undervoltage, the microprocessor analyzes the time delay for 3 seconds (to ensure lightning strike or instantaneous loss of voltage malfunction ) after the opening signal is sent, the high-power electromagnetic relay acts to open the gate, and the corresponding light indicates that the circuit breaker is opened. If the phase C voltage returns to normal, the device will automatically send a closing signal and close the circuit breaker within 5-15 seconds (adjustable).

In the embodiment of the utility model, the detection module collects the state of the line voltage, transmits it to the control module, and through the analysis of the control module, photoelectric coupling, micro-processing analysis and processing, the automatic operation of stopping power transmission is implemented, and the overvoltage under the existing situation is solved. , Undervoltage and loss of voltage self-switching instability, after removing the loss of voltage protection, because the low-voltage circuit breakers of all lines remain closed, all user equipment will start at the same time, the starting current is very large, it is easy to cause instantaneous overload of the line, and it is harmful to the safe operation of the power grid It is extremely unfavorable and there is no removal of the voltage loss protection circuit breaker. When the operating unit restores the power supply, it needs to manually close the switch, which requires a lot of work and slow speed.

The embodiment of the utility model provides an over-undervoltage intelligent self-recovery protection device, including: a detection module 5 with a voltage acquisition circuit and a light display circuit; a control module with an analysis voltage, optocoupler connection, protection and high-power output circuit; the control module includes a detection module 5, which detects the line voltage state by the detection module 5, and implements stop and power transmission self-recovery operations through the control module, which solves overvoltage, undervoltage and failure under existing conditions The voltage self-switching is unstable, and after the loss of voltage protection is removed, because the low-voltage circuit breakers of all lines remain closed, all user equipment will start at the same time, and the starting current is large, which is likely to cause instantaneous overload of the line, which is extremely unfavorable to the safe operation of the power grid and has not been removed. For the loss of voltage protection circuit breaker, when the operating unit restores the power supply, it needs to manually close the switch, which requires a lot of work and slow speed.

A kind of over-undervoltage intelligent self-recovery protection device provided by the utility model has been introduced in detail above. For those of ordinary skill in the art, according to the idea of the utility model embodiment, there will be specific implementation methods and application ranges. Changes, in summary, the content of this specification should not be construed as limiting the utility model.

Claims (10)

1. An overvoltage and undervoltage intelligent self-recovery protection device, characterized in that it comprises: The detection module has a voltage acquisition circuit and a light display circuit; Control module, with analysis voltage, optocoupler matching, protection and high-power output circuit; The control module includes a detection module, which detects the state of the line voltage, and implements stop and power transmission self-recovery operations through the control module. 2. The over-undervoltage intelligent self-recovery protection device according to claim 1, characterized in that it comprises: The over-undervoltage intelligent self-recovery protection device is provided with a rectifier circuit composed of three transformers and corresponding DC conversion circuits for supplying power to the circuits of the detection module and the control module. 3. The overvoltage and undervoltage intelligent self-recovery protection device according to claim 1, wherein the light display circuit specifically includes: The single-chip patch 8S003F3Pb, indicator light, chip 7S33, and 1n4007 are electrically connected in sequence. 4. The overvoltage and undervoltage intelligent self-recovery protection device according to claim 1, wherein the control module specifically includes: The control module has analysis of each voltage circuit, optocoupler connection, protection and high-power relay output circuit; The detection module in the control module, the optocoupler P521, the integrated chip AT89C2051, and the integrated chip 74SL14 are electrically connected in sequence. 5. The overvoltage and undervoltage intelligent self-recovery protection device according to claim 4, wherein the control module specifically includes: The detection module in the control module is also electrically connected with the 7812 protection circuit and the 7805 protection circuit. 6. The overvoltage and undervoltage intelligent self-recovery protection device according to claim 4, wherein the control module specifically includes: The control module also has a light-emitting tube display drive circuit electrically connected to the control chip. 7. The overvoltage and undervoltage intelligent self-recovery protection device according to claim 6, characterized in that it comprises: The over-undervoltage intelligent self-recovery protection device is provided with a light-emitting tube connected to the display driving circuit of the light-emitting tube for indicating the working state of the device. 8. The overvoltage and undervoltage intelligent self-recovery protection device according to claim 1, characterized in that it comprises: The over-undervoltage intelligent self-recovery protection device is provided with a double-dip switch connected to the drive circuit of the control module for setting the time. 9. The overvoltage and undervoltage intelligent self-recovery protection device according to claim 1, characterized in that it comprises: The control module is connected with a high-power electromagnetic relay through a drive circuit. 10. The overvoltage and undervoltage intelligent self-recovery protection device according to claim 2, characterized in that it comprises: The N-line connector, A-phase connector, B-phase connector, and C-phase connector connected to the control module are also provided on the over-undervoltage intelligent self-recovery protection device; The over-undervoltage intelligent self-recovery protection device is also provided with an active branching and closing joint and a switch auxiliary contact access point connected to the rectification circuit.