CN213782972U - High-voltage power distribution cabinet opening and closing monitoring circuit and system - Google Patents
High-voltage power distribution cabinet opening and closing monitoring circuit and system Download PDFInfo
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- CN213782972U CN213782972U CN202022290091.0U CN202022290091U CN213782972U CN 213782972 U CN213782972 U CN 213782972U CN 202022290091 U CN202022290091 U CN 202022290091U CN 213782972 U CN213782972 U CN 213782972U
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Abstract
The utility model provides a high voltage distribution cabinet divide-shut brake monitoring circuit and system, monitoring circuit includes: the switching-on monitoring circuit and the switching-off monitoring circuit are connected to the positive electrode and the negative electrode of the direct-current control bus; the switching-on monitoring circuit comprises a switching-on coil, a breaker normally closed contact, an energy storage limit switch, a first indicator light and a first control switch, wherein the switching-on coil, the breaker normally closed contact, the energy storage limit switch and the first indicator light are sequentially connected in series; the separating brake monitoring loop comprises a separating brake coil, a breaker normally open contact, a second indicator light and a second control switch, wherein the separating brake coil, the breaker normally open contact and the second indicator light are sequentially connected in series. The monitoring of whether the opening and closing coil is damaged or not and the on-off monitoring of the operating power supply can be realized in the secondary circuit of the circuit breaker.
Description
Technical Field
The utility model relates to a circuit breaker secondary circuit control technical field particularly, relates to a high voltage distribution cabinet divide-shut brake monitoring circuit and system.
Background
The circuit breaker is a switching device capable of closing, carrying and opening a current under a normal circuit condition, and closing, carrying and opening a current under an abnormal circuit condition within a specified time, and can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply line, a motor and the like, automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an overvoltage and undervoltage relay and the like. Furthermore, no parts need to be changed after breaking the fault current.
3 ~ 35kV high voltage distribution cabinet need more frequently open sometimes in the mill, can cause circuit breaker divide-shut brake coil to often move like this, and the fault rate also can increase. In case the divide-shut brake coil is in a fault after, can lead to can not realize the divide-shut brake when dividing the divide-shut circuit breaker, produce serious consequence, the broken string of cabinet top little generating line or lose the electricity and also can influence the long-range divide-shut brake of protection in the cabinet and circuit breaker, great potential safety hazard has existed in these circumstances.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the embodiments of the present invention is to provide a circuit and a system for monitoring the opening and closing of a high voltage distribution cabinet, which can realize the monitoring of the integrity of the split-closing coil circuit and the on-off of the operation power supply, and are simple, easy to implement and economical.
The utility model provides a pair of high voltage distribution cabinet divide-shut brake monitoring circuit, include: the switching-on monitoring circuit and the switching-off monitoring circuit are connected to the positive electrode and the negative electrode of the direct-current control bus; the switching-on monitoring circuit comprises a switching-on coil, a breaker normally closed contact, an energy storage limit switch, a first indicator light and a first control switch, wherein the switching-on coil, the breaker normally closed contact, the energy storage limit switch and the first indicator light are sequentially connected in series, and the first control switch is connected to two ends of the first indicator light in parallel; the opening monitoring circuit comprises an opening coil, a breaker normally open contact, a second indicator light and a second control switch, wherein the opening coil, the breaker normally open contact and the second indicator light are sequentially connected in series, and the second control switch is connected in parallel to two ends of the second indicator light; the first control switch and the second control switch are both electrically connected with the controller, and the controller is configured to control the first control switch and the second control switch to be turned on and off.
Preferably, the closing monitoring circuit further comprises a first current sensor, and the first current sensor is connected in series to the first indicator light and is connected in parallel to the first control switch; the opening monitoring loop further comprises a second current sensor which is connected in series with the second indicator light and is connected in parallel with the second control switch; the first current sensor and the second current sensor are both electrically connected with the controller.
Preferably, the high-voltage power distribution cabinet opening and closing monitoring circuit further comprises a wireless communication module, the wireless communication module is electrically connected with the controller, and the wireless communication module is used for sending current information detected by the first current sensor and the second current sensor to a remote monitoring platform and receiving switch control signals sent by the remote monitoring platform to the first control switch and the second control switch.
Preferably, the closing monitoring circuit further includes a first resistor, and the first resistor is connected in series to the first indicator light and is connected in parallel to the first control switch; the opening monitoring loop further comprises a second resistor, and the second resistor is connected in series with the second indicator lamp and is connected in parallel with the second control switch.
Preferably, the first indicator light is a green LED light, and the second indicator light is a red LED light.
Preferably, the power of the first indicator light and the second indicator light is less than 10 watts.
Preferably, the first control switch is further connected in series with a first comprehensive protection device, and the first comprehensive protection device is connected in parallel with the first indicator lamp; the second control switch is also connected with a second comprehensive protection device in series, and the second comprehensive protection device is connected with the second indicator lamp in parallel.
The utility model also provides a high voltage distribution cabinet divide-shut brake monitored control system, high voltage distribution cabinet divide-shut brake monitored control system includes foretell high voltage distribution cabinet divide-shut brake and keeps watch on return circuit and remote monitoring platform, remote monitoring platform with high voltage distribution cabinet divide-shut brake keeps watch on return circuit communication connection, remote monitoring platform is configured into and receives the controller sends close a floodgate and keep watch on the return circuit with the state in separating brake monitoring return circuit, and give first control switch with switch control signal is issued to the second control switch.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a high voltage distribution cabinet divide-shut brake monitoring loop, through the pilot lamp of establishing ties high impedance in closing a floodgate monitoring loop and separating brake monitoring loop respectively, utilize the pilot lamp of high impedance and the branch closing coil of fixed impedance to constitute the return circuit, by the principle of the partial pressure of high impedance, when the return circuit is normal, the pilot lamp can light, can realize the supervision whether to the branch closing coil damage in the circuit breaker secondary circuit, and monitor the break-make of operating power supply. The utility model provides a high voltage distribution cabinet divide-shut brake monitored control system utilizes remote monitoring platform to receive sending of controller the combined floodgate is kept watch on the return circuit with the state in separating brake monitoring return circuit, and gives first control switch with the second control switch send on-off control signal, realize remote control and keep watch on.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is the embodiment of the utility model provides a circuit structure schematic diagram that high voltage distribution cabinet divide-shut brake kept watch on return circuit is provided.
Fig. 2 the embodiment of the utility model provides a second provides the circuit structure schematic diagram of high voltage distribution cabinet divide-shut brake monitoring circuit.
Fig. 3 is a circuit block diagram of the second embodiment of the present invention for providing a switching monitoring system of a high voltage distribution cabinet.
Icon:
a closing coil HQ; a brake separating coil TQ; a breaker normally closed contact QF 1; a normally open contact QF2 of the circuit breaker; an energy storage limit switch S1; a first indicator light L1; a second indicator light L2; a first control switch Q1; a second control switch Q2; a first resistor R1; a second resistor R2; a controller U1; a high-voltage power distribution cabinet opening and closing monitoring system 10; a first current sensor 11; a second current sensor 12; a wireless communication module 13; a first integrated protection device 14; a second integrated protection device 15; a remote monitoring platform 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Fig. 1 is a schematic circuit diagram of a switching monitoring circuit of a high-voltage distribution cabinet according to this embodiment. The switching-on and switching-off monitoring circuit of the high-voltage power distribution cabinet comprises a direct-current control bus, a switching-on monitoring circuit, a switching-off monitoring circuit and a controller U1. The direct-current control bus comprises a direct-current control bus anode + KM and a direct-current control bus cathode-KM, and the switching-on monitoring loop and the switching-off monitoring loop are connected to two ends of the direct-current control bus anode + KM and the direct-current control bus cathode-KM.
The closing monitoring circuit comprises a closing coil HQ, a breaker normally closed contact QF1, an energy storage limit switch S1, a first indicator lamp L1 and a first control switch Q1, wherein the closing coil HQ, the breaker normally closed contact QF1, the energy storage limit switch S1 and the first indicator lamp L1 are sequentially connected in series, and the first control switch Q1 is connected to two ends of the first indicator lamp L1 in parallel. The opening monitoring loop comprises an opening coil TQ, a breaker normally-open contact QF2, a second indicator light L2 and a second control switch Q2, the opening coil TQ, the breaker normally-open contact QF2 and the second indicator light L2 are sequentially connected in series, and the second control switch Q2 is connected to two ends of the second indicator light L2 in parallel.
The first control switch Q1 and the second control switch Q2 are both electrically connected to the controller U1, and the controller U1 is configured to control the on and off of the first control switch Q1 and the second control switch Q2.
In this embodiment, the first indicator light L1 is a green LED light, and the second indicator light L2 is a red LED light, preferably, the power of the first indicator light L1 and the power of the second indicator light L2 are less than 10w, and in this embodiment, an LED light with a power of 4.5w is selected. The Controller U1 may be a Programmable Logic Controller (PLC). Of course, in other embodiments, the controller U1 may be other, such as an MCU.
In this embodiment, the first control switch Q1 is further connected in series with a first comprehensive protection device 14, and the first comprehensive protection device 14 is connected in parallel with the first indicator light L1; the second control switch Q2 is also connected in series with a second comprehensive protection device 15, and the second comprehensive protection device 15 is connected in parallel with the second indicator light L2. The first and second integrated protection devices 14, 15 are used to protect against abnormal situations (short circuit, open circuit, short circuit, etc.) in the circuit in the high voltage distribution cabinet.
The embodiment of the utility model provides a theory of operation does: after the energy of the breaker is stored, the energy storage limit switch S1S1 is closed, the normally closed contact QF1 of the breaker is still in a closed state, after a closing signal is sent to the breaker, the first control switch Q1 is closed, the closing monitoring circuit is switched on, the closing coil HQ acts, the normally closed contact QF1 of the breaker is opened, the closing monitoring circuit of the breaker is cut off, the closing action is finished, the normally open contact QF2 of the breaker is closed, and the monitoring stage of the opening monitoring circuit is started. Since the impedance of the switching coil TQ is generally about 200 Ω, and the switching coil TQ is generally required to be started with a voltage greater than 80% of the loop voltage, in this embodiment, the power of the second indicator lamp L2 is 4.5W, the bus voltage is 220V, the impedance of the second indicator lamp L2 is 10.76k Ω, only the switching coil TQ and the second indicator lamp L2 are in the loop, the total impedance is 0.2+10.76 ═ 10.96k Ω, the voltage of the switching coil TQ is 220/10.96 × 0.2 ═ 4V, and is much smaller than 80% × 220 ═ 176V, so that the switching coil TQ does not reach the starting voltage, and therefore the switching coil TQ is not started, but the second indicator lamp L2 is turned on to turn on the red lamp, thereby achieving the purpose of monitoring the switching monitoring loop and the operating power supply.
Similarly, after the breaker is subjected to a brake-separating signal, the second control switch Q2 is closed, the incorporated brake-separating signal is connected into the circuit through the parallel loop, and the brake-separating coil TQ acts to separate the breaker. After the brake is separated, the normally closed contact QF1 of the circuit breaker is closed, the closing monitoring circuit is switched on, current flows from the first indicator lamp L1 according to the voltage division principle of the second indicator lamp L2, and after the voltage division, the closing coil HQ cannot reach the starting voltage, so the closing coil HQ cannot be started, but the first indicator lamp L1 is switched on, and the green lamp is turned on. Therefore, the monitoring device not only can monitor a closing circuit, but also can play a role in checking whether the operating power supply is electrified, and achieves the purposes of closing and opening monitoring and monitoring the electrified condition of the operating power supply.
Example two
Fig. 2 is a schematic circuit diagram of a switching monitoring circuit of a high-voltage distribution cabinet according to a second embodiment. The difference between the present embodiment and the first embodiment is that the opening/closing monitoring circuit of the high-voltage power distribution cabinet further includes a voltage dividing resistor and a current sensor.
Specifically, the closing monitoring circuit further includes a first current sensor 11, and the first current sensor 11 is connected in series to the first indicator light L1 and is connected in parallel to the first control switch Q1. The opening monitoring loop also comprises a second current sensor 12, and the second current sensor 12 is connected in series with the second indicator light L2 and is connected in parallel with the second control switch Q2. The first current sensor 11 and the second current sensor 12 are both electrically connected to the controller U1. The controller U1 is configured to receive current information of the first current sensor 11 and the second current sensor 12, determine whether the closing monitoring circuit and the opening monitoring circuit are faulty, and determine whether the dc control bus is powered normally.
The first resistor R1 and the second resistor R2 are high-impedance resistors and are used for voltage division, and accidental starting caused by overlarge voltages of the closing coil HQ and the opening coil TQ is prevented.
Fig. 3 is a circuit block diagram of a high voltage distribution cabinet opening/closing monitoring system 10 according to an embodiment of the present invention. The high-voltage power distribution cabinet opening and closing monitoring system 10 comprises a high-voltage power distribution cabinet opening and closing monitoring loop provided by the first embodiment, a first current sensor 11, a second current sensor 12, a wireless communication module 13 and a remote monitoring platform 16, wherein the wireless communication module 13 is electrically connected with a controller U1, and the wireless communication module 13 is in communication connection with the remote monitoring platform 16.
The wireless communication module 13 is configured to transmit the current information detected by the first current sensor 11 and the second current sensor 12 to the remote monitoring platform 16, and receive the switch control signal from the remote monitoring platform 16 to the first control switch Q1 and the second control switch Q2. The remote monitoring platform 16 is configured to receive the states of the closing monitoring loop and the opening monitoring loop from the controller U1, and issue switch control signals to the first control switch Q1 and the second control switch Q2. Therefore, the switching-on and switching-off circuit can be remotely monitored, the function of checking whether the operation power supply is electrified can be realized, and the purposes of switching-on and switching-off remote monitoring and operation power supply electrification condition monitoring are realized.
The utility model provides a high voltage distribution cabinet divide-shut brake monitoring circuit especially is applicable to 3 ~ 35 kV's high voltage distribution cabinet.
The utility model provides a high voltage distribution cabinet divide-shut brake monitoring circuit and system, through the pilot lamp of establishing ties high impedance in closing a floodgate monitoring circuit and separating brake monitoring circuit respectively, utilize the pilot lamp of high impedance and the branch closing coil of fixed impedance to constitute the return circuit, by the principle of the partial pressure of high impedance, when the return circuit is normal, the pilot lamp can light, can realize the monitoring whether to the branch closing coil damage in the circuit breaker secondary circuit, and monitor the break-make of operating power supply. The high-voltage power distribution cabinet opening and closing monitoring system receives the states of the closing monitoring circuit and the opening monitoring circuit sent by the controller and sends switch control signals to the first control switch and the second control switch by using a remote monitoring platform, so that remote control and monitoring are realized.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (8)
1. The utility model provides a high voltage distribution cabinet divide-shut brake monitoring circuit which characterized in that includes: the switching-on monitoring circuit and the switching-off monitoring circuit are connected to the positive electrode and the negative electrode of the direct-current control bus;
the switching-on monitoring circuit comprises a switching-on coil, a breaker normally closed contact, an energy storage limit switch, a first indicator light and a first control switch, wherein the switching-on coil, the breaker normally closed contact, the energy storage limit switch and the first indicator light are sequentially connected in series, and the first control switch is connected to two ends of the first indicator light in parallel;
the opening monitoring circuit comprises an opening coil, a breaker normally open contact, a second indicator light and a second control switch, wherein the opening coil, the breaker normally open contact and the second indicator light are sequentially connected in series, and the second control switch is connected in parallel to two ends of the second indicator light;
the first control switch and the second control switch are both electrically connected with the controller, and the controller is configured to control the first control switch and the second control switch to be turned on and off.
2. The switch-on/switch-off monitoring circuit of the high-voltage power distribution cabinet according to claim 1, wherein the switch-on monitoring circuit further comprises a first current sensor, and the first current sensor is connected in series with the first indicator lamp and is connected in parallel with the first control switch;
the opening monitoring loop further comprises a second current sensor which is connected in series with the second indicator light and is connected in parallel with the second control switch;
the first current sensor and the second current sensor are both electrically connected with the controller.
3. The switch-on/switch-off monitoring circuit of the high-voltage power distribution cabinet according to claim 2, further comprising a wireless communication module, wherein the wireless communication module is electrically connected with the controller, and the wireless communication module is used for sending current information detected by the first current sensor and the second current sensor to a remote monitoring platform and receiving switch control signals sent by the remote monitoring platform to the first control switch and the second control switch.
4. The switch-on/switch-off monitoring circuit of the high-voltage power distribution cabinet according to claim 2, wherein the switch-on monitoring circuit further comprises a first resistor, and the first resistor is connected in series with the first indicator lamp and is connected in parallel with the first control switch;
the opening monitoring loop further comprises a second resistor, and the second resistor is connected in series with the second indicator lamp and is connected in parallel with the second control switch.
5. The high-voltage power distribution cabinet opening and closing monitoring circuit according to claim 1, wherein the first indicator lamp is a green LED lamp, and the second indicator lamp is a red LED lamp.
6. The switch-on/switch-off monitoring circuit of a high-voltage power distribution cabinet according to claim 5, wherein the power of the first indicator light and the power of the second indicator light are less than 10 watts.
7. The high-voltage power distribution cabinet opening and closing monitoring circuit according to claim 1, wherein the first control switch is further connected with a first comprehensive protection device in series, and the first comprehensive protection device is connected with the first indicator lamp in parallel; the second control switch is also connected with a second comprehensive protection device in series, and the second comprehensive protection device is connected with the second indicator lamp in parallel.
8. A high voltage distribution cabinet opening and closing monitoring system, characterized in that the high voltage distribution cabinet opening and closing monitoring system comprises the high voltage distribution cabinet opening and closing monitoring circuit according to any one of claims 1 to 7 and a remote monitoring platform, the remote monitoring platform is in communication connection with the high voltage distribution cabinet opening and closing monitoring circuit, and the remote monitoring platform is configured to receive the states of the closing monitoring circuit and the opening monitoring circuit sent by the controller and send switch control signals to the first control switch and the second control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022290091.0U CN213782972U (en) | 2020-10-15 | 2020-10-15 | High-voltage power distribution cabinet opening and closing monitoring circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022290091.0U CN213782972U (en) | 2020-10-15 | 2020-10-15 | High-voltage power distribution cabinet opening and closing monitoring circuit and system |
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| Publication Number | Publication Date |
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| CN213782972U true CN213782972U (en) | 2021-07-23 |
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| CN202022290091.0U Active CN213782972U (en) | 2020-10-15 | 2020-10-15 | High-voltage power distribution cabinet opening and closing monitoring circuit and system |
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| CN (1) | CN213782972U (en) |
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