CN210604775U - Simple and easy efficient bus duct temperature current hybrid monitoring alarm circuit device - Google Patents
Simple and easy efficient bus duct temperature current hybrid monitoring alarm circuit device Download PDFInfo
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- CN210604775U CN210604775U CN201921370968.8U CN201921370968U CN210604775U CN 210604775 U CN210604775 U CN 210604775U CN 201921370968 U CN201921370968 U CN 201921370968U CN 210604775 U CN210604775 U CN 210604775U
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 25
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
The utility model discloses a simple and easy efficient bus duct temperature electric current of bus duct temperature electric current detection and warning circuit technical field mixes monitoring alarm circuit device, including first way live wire, second way live wire, third way live wire and zero line, cup jointed current transformer on first way live wire, second way live wire, third way live wire and the zero line respectively, it has temperature sensor to establish ties respectively on four group current transformer, four group temperature sensor fully contact with the surface of the connecting copper bar of first way live wire, second way live wire, third way live wire and zero line respectively; the utility model discloses a voltage that the ADC gathered and the product of the electric current and the absolute temperature size of bus duct are linear to realize the mixed monitoring of bus duct temperature electric current and report to the police, satisfied the bus duct regulation and must not surpass the requirement of different rated current under different temperatures, greatly reduced monitoring alarm device's cost.
Description
Technical Field
The utility model relates to a bus duct temperature current detects and alarm circuit technical field, concretely relates to simple and easy efficient bus duct temperature current hybrid monitoring alarm circuit device.
Background
The development of modern industry makes the use of bus duct in each building increasingly extensive, in order to guarantee the supply of whole building electric power, bus duct needs to bear the current of thousands of amperes or even ten thousand amperes usually, and overcurrent also can cause the bus duct temperature to rise simultaneously, causes the loss of bus duct itself.
Currently, most bus duct temperature and current detection systems set an absolute current, and alarm is given when the absolute current is exceeded; or an absolute temperature is set above which an alarm is given. The bus ducts have certain rated current, but different temperatures correspond to different rated currents. The bus duct must not exceed the rated current specified under the temperature condition at that time when working. Generally, the higher the temperature, the lower the rated current allowed by the bus duct.
Therefore, in the current bus duct current temperature monitoring system, if the absolute current is set too low, when the bus duct current exceeds the absolute current, even if the current does not exceed the rated current under the current temperature condition, an alarm can be given, so that the current carrying capacity of the bus duct is not fully utilized, and the waste of resources is caused; if the absolute current is set to be too high, if the current temperature is higher, even if the current of the bus duct exceeds the rated current, the alarm cannot be given because the set absolute current value is not reached, so that the loss of the bus duct is too high for a long time, and the danger is caused.
Based on this, the utility model designs a simple and easy efficient bus duct temperature electric current hybrid monitoring alarm circuit device to solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple and easy efficient bus duct temperature electric current hybrid monitoring alarm circuit device to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a simple and easy efficient bus duct temperature current mixes monitoring alarm circuit device, includes first way live wire, second way live wire, third way live wire and zero line, it has current transformer, four groups to cup joint respectively on first way live wire, second way live wire, third way live wire and the zero line temperature sensor has established ties respectively on the current transformer, four groups temperature sensor fully contacts with the surface of the connection copper bar of first way live wire, second way live wire, third way live wire and zero line respectively, four groups temperature sensor's one end ground connection, four groups it has the ADC to connect in parallel respectively on the current transformer, current transformer's earthing terminal and ADC's negative pole electric connection, another end of current transformer and ADC's anodal electric connection, four groups electric connection has wired or wireless communication module between the ADC.
Preferably, the model of the temperature sensor is pt 100.
Preferably, the wired or wireless communication module comprises a single chip microcomputer as an internal module, the output ends of the four groups of ADCs are connected with four GPIO ports of the single chip microcomputer in the wired or wireless communication module, and the wired or wireless communication module is connected with a monitoring server on the Internet in a wired or wireless communication mode.
Preferably, the first live wire, the second live wire, the third live wire and the zero wire calculate voltage parameters at two ends of the temperature sensor at each temperature point according to rated voltages of the bus duct at different temperature points, then select the lowest value as a corresponding threshold alarm voltage, and send an alarm signal for the connection when the voltages at two ends of the temperature sensor in the connection of the circuit exceed the threshold alarm voltage.
Preferably, the wired or wireless communication module accesses the router and then reaches the internet in a wired manner such as power carrier and ethernet or a wireless manner such as NB-IoT and Lora remote access manner, or in a wireless manner such as WiFi or Zigbee.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a voltage that the ADC gathered and the product of the electric current and the absolute temperature size of bus duct are linear relation to realize the hybrid monitoring of bus duct temperature electric current and report to the police. On one hand, the requirement that the specified bus duct can not exceed different rated currents at different temperatures is met; in addition, each path of temperature and current detection of the device only uses one ADC for sampling, so that the number of half of ADCs is saved, the cost of the monitoring and alarming device is greatly reduced, meanwhile, the setting of different rated currents under different temperature conditions is considered, and the alarm is only given when the bus duct exceeds the rated current under the current temperature condition, so that the current bearing capacity of the bus duct is exerted to the maximum extent, the loss of the bus duct is not caused, and finally the dangerous condition is caused.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the circuit diagram of the current and temperature hybrid detection alarm device of the utility model.
Fig. 2 is a diagram of the allowable working range of current and temperature under the condition of setting the absolute voltage at the two ends of the temperature sensor.
Fig. 3 is a long-term operating current diagram allowed by the bus duct of the present invention at different temperatures.
Fig. 4 is the utility model discloses temperature and current hybrid monitoring alarm device's flow chart sets up.
In the drawings, the components represented by the respective reference numerals are listed below:
101-a first path of live wire, 102-a second path of live wire, 103-a third path of live wire, 104-a zero wire, 105-a current transformer, 106-a temperature sensor, 107-an ADC, 108-a wired or wireless communication module.
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. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a simple and easy high-efficient bus duct temperature current mixes monitoring alarm circuit device, including first way live wire 101, second way live wire 102, third way live wire 103 and zero line 104, first way live wire 101, second way live wire 102, current transformer 105 has been cup jointed on third way live wire 103 and the zero line 104 respectively, temperature sensor 106 has been established ties respectively on four groups of current transformer 105, four groups of temperature sensor 106 fully contact with the surface of the first way live wire 101, second way live wire 102, third way live wire 103 and the connecting copper bar of zero line 104 respectively, the one end ground connection of four groups of temperature sensor 106, be connected with ADC107 in parallel respectively on four groups of current transformer 105, the earthing terminal of current transformer 105 and the negative pole electric connection of ADC107, the other end of current transformer 105 and the anodal electric connection of ADC107, electric connection has wired or wireless communication module 108 between four groups of ADC 107.
The model of the temperature sensor 106 is pt 100.
The wired or wireless communication module 108 comprises a single chip microcomputer as an internal module, the output ends of the four groups of ADCs 107 are connected with four GPIO ports of the single chip microcomputer in the wired or wireless communication module 108, and the wired or wireless communication module 108 is connected with a monitoring server on the Internet in a wired or wireless communication mode.
The first live wire 101, the second live wire 102, the third live wire 103 and the zero wire 104 calculate voltage parameters at two ends of the temperature sensor 106 of each temperature point according to rated voltages of the bus duct at different temperature points, then select the lowest value as a corresponding threshold alarm voltage, and send out an alarm signal of the connection when the voltage at two ends of the temperature sensor 106 in the connection exceeds the threshold alarm voltage.
The wired or wireless communication module 108 accesses the router to the internet in a wired manner such as power carrier and ethernet or in a wireless manner such as NB-IoT and Lora, or in a wireless manner such as WiFi or Zigbee.
One specific application of this embodiment is: the wired or wireless communication module 108 comprises a single chip microcomputer as an internal module, the output ends of the four groups of ADCs 107 are connected with four GPIO ports of the wired or wireless communication module 108, the wired or wireless communication module 108 is electrically connected with the single chip microcomputer, the output end of the single chip microcomputer is electrically connected with a server, corresponding ADC107 output data are sent to the single chip microcomputer to be processed, meanwhile, a user can program the single chip microcomputer, alarm voltages and the like at two ends of corresponding temperature sensors are set, then the communication module sends the corresponding data to the server, and the server can inform the user under necessary conditions, such as alarm short message notification.
According to the circuit connection method, the voltage across the pt100 resistor is set not to exceed V0, then
Ip*Rp＝βI*R0(1+αT)<V0
Wherein Ip and Rp are the current passing through the temperature sensor 106 and its own resistance, respectively, β is the mutual inductance coefficient of the current transformer, I is the current passing through a certain live wire or zero wire of the bus duct, R0 is the resistance value of the pt100 temperature sensor at 0C, and α is the temperature coefficient of the pt100 temperature sensor.
The steps for determining the specific parameter values in the above formula are as follows:
firstly, selecting two parameter values of a temperature coefficient α of the temperature sensor 106 and a mutual inductance coefficient β of the current transformer according to the input voltage range of the ADC107, wherein the temperature coefficient of the pt100 temperature sensor 106 is generally fixed and is about 0.00392/C, so that the voltage at two ends of the temperature sensor does not exceed the input voltage range of the ADC107 during normal operation and has enough redundancy by mainly selecting the mutual inductance coefficient β of the current transformer;
secondly, according to the size and the placement mode of the bus duct with the temperature and current hybrid monitoring alarm, the corresponding rated current values of the bus duct at different temperatures are determined. Fig. 3 is a current rating of a typical bus duct at different temperatures.
The rated alternating current of the last row of the bus duct in fig. 3 at different temperatures when vertically placed is taken as an example to determine the corresponding parameters.
Assuming that the temperature sensor 106 with α ═ 0.00392/C is selected, the resistance of pt100 temperature sensor is 100ohm when T is 0C, if we choose β ═ 1/200000, the voltage across the temperature sensor is calculated according to the above formula
V＝Ip*Rp＝βI*R0(1+αT)
The voltage rating across the respective temperature sensor 106 corresponding to the rated current 2610A for the bus duct at 25C is 1.4329V.
Next, according to the same formula, rated voltage values at two ends of the temperature sensor 106 corresponding to other temperature points are calculated, the calculated rated voltages at 30C, 35C and 40C are 1.3914V, 1.3248V and 1.2401V respectively, and in conservative consideration, the minimum rated voltage 1.2401V is selected as the rated voltage V0 during alarming. This ensures that the circuit arrangement will also sound if another temperature exceeds the rated current of the temperature point.
And finally, writing the determined parameters comprising α, R0 and V0 into a singlechip program in a communication module, so that the temperature and current hybrid monitoring and alarming device can start to work normally, and sending an alarming signal through the communication module by the route whenever the voltage at two ends of the temperature sensor of which route of the power supply circuit of the bus duct exceeds V0.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The utility model provides a simple and easy efficient bus duct temperature electric current mixes monitoring alarm circuit device, includes first way live wire (101), second way live wire (102), third way live wire (103) and zero line (104), its characterized in that: the first live wire (101), the second live wire (102), the third live wire (103) and the zero wire (104) are respectively sleeved with a current transformer (105), four groups of current transformers (105) are respectively connected in series with a temperature sensor (106), four groups of temperature sensors (106) are respectively in full contact with the surfaces of connecting copper bars of the first live wire (101), the second live wire (102), the third live wire (103) and the zero wire (104), one end of each of the four groups of temperature sensors (106) is grounded, four groups of current transformers (105) are respectively connected in parallel with an ADC (107), the grounding end of the current transformer (105) is electrically connected with the negative electrode of the ADC (107), the other end of the current transformer (105) is electrically connected with the anode of the ADC (107), and a wired or wireless communication module (108) is electrically connected between the four groups of ADCs (107).
2. The simple and efficient bus duct temperature and current hybrid monitoring and alarming circuit device is characterized in that: the type of the temperature sensor (106) is pt 100.
3. The simple and efficient bus duct temperature and current hybrid monitoring and alarming circuit device is characterized in that: the wired or wireless communication module (108) comprises a single chip microcomputer serving as an internal module, the output ends of the four groups of ADCs (107) are connected with four GPIO ports of the single chip microcomputer in the wired or wireless communication module (108), and the wired or wireless communication module (108) is connected with a monitoring server on the Internet in a wired or wireless communication mode.
4. The simple and efficient bus duct temperature and current hybrid monitoring and alarming circuit device is characterized in that: the first live wire (101), the second live wire (102), the third live wire (103) and the zero wire (104) calculate voltage parameters at two ends of a temperature sensor (106) of each temperature point according to rated voltages of the bus duct at different temperature points, then select the lowest value as corresponding threshold alarm voltage, and send out an alarm signal connected in the circuit when the voltage at two ends of the temperature sensor (106) in the circuit exceeds the threshold alarm voltage.
5. The simple and efficient bus duct temperature and current hybrid monitoring and alarming circuit device is characterized in that: the wired or wireless communication module (108) is accessed to the router in a wired mode such as power carrier and Ethernet or a wireless mode such as NB-IoT and Lora, or in a wireless mode such as WiFi or Zigbee and the like, and then reaches the Internet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921370968.8U CN210604775U (en) | 2019-08-22 | 2019-08-22 | Simple and easy efficient bus duct temperature current hybrid monitoring alarm circuit device |
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| CN201921370968.8U CN210604775U (en) | 2019-08-22 | 2019-08-22 | Simple and easy efficient bus duct temperature current hybrid monitoring alarm circuit device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398627A (en) * | 2019-08-22 | 2019-11-01 | 杨柳 | A kind of bus duct temperature current hybrid monitoring alarm circuit device of simple and efficient |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398627A (en) * | 2019-08-22 | 2019-11-01 | 杨柳 | A kind of bus duct temperature current hybrid monitoring alarm circuit device of simple and efficient |
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Effective date of registration: 20240428 Address after: No. 4, 16th Floor, No. 596 Huangpu Road, Ganjingzi District, Dalian City, Liaoning Province, 116000 Patentee after: Dalian Jiuwei Electric Power Technology Co.,Ltd. Country or region after: China Address before: 210001 No.5, Yongzhi Road, Qinhuai District, Nanjing City, Jiangsu Province Patentee before: Yang Liu Country or region before: China |