CN105092945A - Zero-line overcurrent alarm device for power distribution network - Google Patents
Zero-line overcurrent alarm device for power distribution network Download PDFInfo
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- CN105092945A CN105092945A CN201510427827.5A CN201510427827A CN105092945A CN 105092945 A CN105092945 A CN 105092945A CN 201510427827 A CN201510427827 A CN 201510427827A CN 105092945 A CN105092945 A CN 105092945A
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Abstract
The invention discloses a zero-line overcurrent alarm device for a power distribution network. The zero-line overcurrent alarm device comprises an alarm horn, an alarm lamp, a current transformer, a button, resistors, capacitors, a potentiometer, diodes, Zener diodes, integrated circuits, a relay, a time relay, a cell phone module and a charger, wherein a first resistor, a first capacitor, a first diode, a second Zener diode and a third capacitor form a power supply circuit, the current transformer, a second diode, a second resistor, the potentiometer, a first Zener diode, the second capacitor, a first integrated circuit, the relay and a third diode form a current monitoring circuit, the alarm horn and the alarm lamp form an acousto-optic alarm circuit, and the second integrated circuit, the cell phone module and the time relay form a wireless remote alarm circuit. The zero-line overcurrent alarm device is reasonable in design, simple in structure, easy for manufacture and high in sensitivity and is accurate and reliable. When three-phase voltage unbalance occurs, and the heavy current runs through a zero line, the automatic acousto-optic onsite alarm and wireless remote alarm are given off.
Description
Technical field
The present invention relates to a kind of electric power warning device, be specifically related to a kind of power distribution network zero line excess current warning device.
Background technology
Low-voltage network (380 volts) mostly adopts TN system cloud gray model, due to the reason such as three-phase load unbalance or singlephase earth fault, can neutral point drifting be caused, produce displacement voltage, at this moment very big current can be flow through in the neutral line, sometimes hundreds of ampere can be reached.The neutral line has displacement voltage, and three-phase voltage is just uneven, causes certain phase voltage higher than the maximum permissible voltage of equipment and certain phase voltage lower than the minimum permission voltage of equipment, equipment can not normally be run.
At present, the power distribution network neutral line does not all install current monitoring system, therefore, in order to ensure that equipment normally runs, do not occur because neutral line operation exception causes equipment failure, develop a kind of power distribution network zero line excess current warning device, realize centering line current and carry out monitoring and report to the police necessary.
Summary of the invention
Object of the present invention is exactly the defect existed for prior art, provides a kind of power distribution network zero line excess current warning device.
Its technical scheme is: power distribution network zero line excess current warning device, comprise alarming horn, alarm lamp, current transformer, button, resistance, electric capacity, potentiometer, diode, voltage stabilizing diode, integrated circuit, relay, the time relay, mobile module and charger, described current transformer is arranged on the zero line of substation transformer output terminal, one end of one end and relay first contact that one phase line of substation transformer output terminal connects the first electric capacity by button is connected, the other end of relay first contact is connected with alert one end of loudspeaker and one end of alarm lamp, the other end of the first electric capacity is connected with the positive pole of the first diode, the negative pole of the first diode and 1 pin of the first integrated circuit, the negative pole of the second voltage stabilizing diode, the positive pole of the 3rd electric capacity, one end of relay second contact, one end of relay the 3rd contact and the electrode input end of charger are connected, the other end of relay second contact is connected with one end of the time relay, and the other end of relay the 3rd contact is connected with the power positive end of the second integrated circuit, 2 pin of described first integrated circuit and 3 pin of the first integrated circuit, one end of relay and the negative pole of the 3rd diode are connected, 5 pin of the first integrated circuit and the positive pole of the second electric capacity, the negative pole of the first voltage stabilizing diode and one end of the 3rd resistance are connected, the other end of the 3rd resistance is connected with the moved end of potentiometer, one quiet end of potentiometer is connected by the negative pole of the second resistance with the second diode, the positive pole of the second diode is connected with one end of current transformer, the other end of described current transformer and the zero line of substation transformer output terminal, another quiet end of potentiometer, the positive pole of the first voltage stabilizing diode, the negative pole of the second electric capacity, 4 pin of the first integrated circuit, the other end of the first relay, the positive pole of the 3rd diode, the positive pole of the second voltage stabilizing diode, the negative pole of the 3rd electric capacity, the other end of the time relay, the ground terminal of the second integrated circuit and the ground terminal of charger are connected, the described output terminal of the second integrated circuit is connected with the microphone input of mobile module, and two ends, described time relay contact are connected with the two ends of the voice mail button of mobile module.
Described alarming horn is the high sound alarm loudspeaker of Alternating Current Power Supply; Described alarm lamp is the flashlamp of Alternating Current Power Supply.
Described current transformer is the one in 5/30,5/50,5/100 or 5/300.
Described charger is vehicle carried mobile phone charger circuit.
The model of described first integrated circuit is TWH8778 or TWH8752; Described second integrated circuit is the record/playback integrated circuit with alarm voice.
Described button is closed type button.
The resistance of described first resistance is 1M Ω, and the resistance of the second resistance is 4.7K Ω, and the resistance of the 3rd resistance is 1K Ω; The resistance of described potentiometer is 100K Ω; The capacity of described first electric capacity is 0.47 μ F, and withstand voltage is 400-630V, and the capacity of the second electric capacity and the 3rd electric capacity is 100-470 μ F, and withstand voltage is 50V; The model of described first diode and the second diode is 1N4007; The voltage stabilizing value of described first voltage stabilizing diode is 1.6V, and the voltage stabilizing value of the second voltage stabilizing diode is 12V.
The present invention compared with prior art, have the following advantages: reasonable in design, structure is simple, easily make, highly sensitive, accurately and reliably, at generation imbalance of three-phase voltage, flow through in the neutral line very big current time, automatically ready-made warning and the wireless remote alarming of acousto-optic can be sent, remind staff to process in time, effectively avoid the generation of accident.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of an embodiment of the present invention.
Embodiment
With reference to Fig. 1, a kind of power distribution network zero line excess current warning device, comprise alarming horn, alarm lamp, current transformer, button, resistance, electric capacity, potentiometer, diode, voltage stabilizing diode, integrated circuit, relay, the time relay, mobile module and charger, described current transformer L is arranged on the zero line n of substation transformer BY output terminal, one end of one end and relay first contact J1-1 that one phase line c of substation transformer BY output terminal connects the first electric capacity C1 by button AN is connected, the other end of relay first contact J1-1 is connected with alert one end of loudspeaker LD and one end of alarm lamp RD, the other end of the first electric capacity C1 is connected with the positive pole of the first diode D1, the negative pole of the first diode D1 and 1 pin of the first integrated circuit (IC) 1, the negative pole of the second voltage stabilizing diode DW2, the positive pole of the 3rd electric capacity C3, one end of relay second contact J1-2, one end of relay the 3rd contact J1-3 and the electrode input end of charger CD are connected, the other end of relay second contact J1-2 is connected with one end of time relay J2, the other end of relay the 3rd contact J1-3 is connected with the power positive end of the second integrated circuit (IC) 2,2 pin of described first integrated circuit (IC) 1 and 3 pin of the first integrated circuit (IC) 1, one end of relay J 1 and the negative pole of the 3rd diode D3 are connected, 5 pin of the first integrated circuit (IC) 1 and the positive pole of the second electric capacity C2, the negative pole of the first voltage stabilizing diode DW1 and one end of the 3rd resistance R3 are connected, the other end of the 3rd resistance R3 is connected with the moved end of potentiometer W, the one quiet end of potentiometer W is connected with the negative pole of the second diode D2 by the second resistance R2, the positive pole of the second diode D2 is connected with one end of current transformer L, the other end of described current transformer L and the zero line n of substation transformer BY output terminal, another quiet end of potentiometer W, the positive pole of the first voltage stabilizing diode DW1, the negative pole of the second electric capacity C2, 4 pin of the first integrated circuit (IC) 1, the other end of relay J 1, the positive pole of the 3rd diode D3, the positive pole of the second voltage stabilizing diode DW2, the negative pole of the 3rd electric capacity C3, the other end of time relay J2, the ground terminal of the second integrated circuit (IC) 2 and the ground terminal of charger CD are connected, the output terminal of described second integrated circuit (IC) 2 is connected with the microphone input of mobile module SJ, and J2-1 two ends, described time relay contact are connected with the two ends of the voice mail button of mobile module SJ.
Described alarming horn LD is the high sound alarm loudspeaker of Alternating Current Power Supply; Described alarm lamp RD is the flashlamp of Alternating Current Power Supply.
Described current transformer L is the one in 5/30,5/50,5/100 or 5/300.
Described charger CD is vehicle carried mobile phone charger circuit.
The model of described first integrated circuit (IC) 1 is TWH8778 or TWH8752; Described second integrated circuit (IC) 2 is the record/playback integrated circuit with alarm voice.
Described button AN is closed type button.
The resistance of described first resistance R1 is 1M Ω, and the resistance of the second resistance R2 is 4.7K Ω, and the resistance of the 3rd resistance R3 is 1K Ω; The resistance of described potentiometer W is 100K Ω; The capacity of described first electric capacity C1 is 0.47 μ F, and withstand voltage is 400-630V, and the capacity of the second electric capacity C2 and the 3rd electric capacity C3 is 100-470 μ F, and withstand voltage is 50V; The model of described first diode D1 and the second diode D2 is 1N4007; The voltage stabilizing value of described first voltage stabilizing diode DW1 is 1.6V, and the voltage stabilizing value of the second voltage stabilizing diode DW2 is 12V.The two ends of described first resistance R1 are connected in parallel the two ends of the first electric capacity C1.
During use, input end A, B, C of substation transformer BY connect high-voltage power supply circuit, and output terminal a, b, c, n of substation transformer BY connect electricity consumption subscriber's line, are arranged on by this device in a housing, are arranged on distance substation transformer 1-2 meters of.
Principle of work: in Fig. 1, the first resistance R1, the first electric capacity C1, the first diode D1, the second voltage stabilizing diode DW2 and the 3rd electric capacity C3 form feed circuit; Current transformer L, the second diode D2, the second resistance R2, potentiometer W, the first voltage stabilizing diode DW1, the second electric capacity C2, the first integrated circuit (IC) 1, relay J 1 and the 3rd diode D3 form current monitoring circuit; Alert loudspeaker LD and alarm lamp RD forms sound light alarming circuit; Second integrated circuit (IC) 2, mobile module SJ and time relay J 2 form wireless remote alarming circuit, and charger CD provides charge power supply for mobile module SJ.
When substation transformer BY subscriber's line circuit is working properly, the electric current flowing through current transformer L is less, its voltage induced is lower, first voltage stabilizing diode DW1 can not puncture conducting, 5th pin operating voltage of the first integrated circuit (IC) 1 is lower than 1.6V, relay J 1 not adhesive, alert loudspeaker LD, alarm lamp RD, time relay J2, the second integrated circuit (IC) 2 all do not work; When causing work abnormal when substation transformer BY subscriber's line circuit because of mutually inclined, the ER effect flowing through current transformer L is large, its voltage induced uprises, as when exceeding setting value, the first voltage stabilizing diode DW1 punctures conducting, the 5th pin current potential of the first integrated circuit (IC) 1 rises to 1.6V, and the first integrated circuit (IC) 1 is overturn, 3rd pin exports high level, relay J 1 adhesive, its all closing of contact, alert loudspeaker LD and alarm lamp RD obtains and electricly sends sound and light alarm; Meanwhile, time relay J2 and the second integrated circuit (IC) 2 obtain electric work, and time relay contact J2-1 connects the voice mail button of mobile module SJ, and mobile module SJ dialing sends wireless remote alarming; The alarm voice that the second integrated circuit (IC) 2 sends can be heard from earphone after operator on duty's mobile phone is received.In this device, mobile module SJ should pre-set the number that Voice mail Number is operator on duty's mobile phone.The timing time of time relay J2 is set to 3-8 seconds, namely, when time relay J 2 obtains electric, its contact conducting also starts timing, and after 3-8 seconds, time relay contact J2-1 disconnects, be equivalent to press the voice mail button 3-8 seconds of mobile module SJ, ensure well to dial.Mobile module SJ can adopt with battery CDMA, GSM mobile handset module or reequip with handset finished product.
The present invention is reasonable in design, structure is simple, easily make, highly sensitive, accurately and reliably, generation imbalance of three-phase voltage, flow through in the neutral line very big current time, automatically can send ready-made warning and the wireless remote alarming of acousto-optic, remind staff to process in time, effectively avoid the generation of accident.
Claims (7)
1. power distribution network zero line excess current warning device, comprise alarming horn, alarm lamp, current transformer, button, resistance, electric capacity, potentiometer, diode, voltage stabilizing diode, integrated circuit, relay, the time relay, mobile module and charger, it is characterized in that: described current transformer is arranged on the zero line of substation transformer output terminal, one end of one end and relay first contact that one phase line of substation transformer output terminal connects the first electric capacity by button is connected, the other end of relay first contact is connected with alert one end of loudspeaker and one end of alarm lamp, the other end of the first electric capacity is connected with the positive pole of the first diode, the negative pole of the first diode and 1 pin of the first integrated circuit, the negative pole of the second voltage stabilizing diode, the positive pole of the 3rd electric capacity, one end of relay second contact, one end of relay the 3rd contact and the electrode input end of charger are connected, the other end of relay second contact is connected with one end of the time relay, and the other end of relay the 3rd contact is connected with the power positive end of the second integrated circuit, 2 pin of described first integrated circuit and 3 pin of the first integrated circuit, one end of relay and the negative pole of the 3rd diode are connected, 5 pin of the first integrated circuit and the positive pole of the second electric capacity, the negative pole of the first voltage stabilizing diode and one end of the 3rd resistance are connected, the other end of the 3rd resistance is connected with the moved end of potentiometer, one quiet end of potentiometer is connected by the negative pole of the second resistance with the second diode, the positive pole of the second diode is connected with one end of current transformer, the other end of described current transformer and the zero line of substation transformer output terminal, another quiet end of potentiometer, the positive pole of the first voltage stabilizing diode, the negative pole of the second electric capacity, 4 pin of the first integrated circuit, the other end of the first relay, the positive pole of the 3rd diode, the positive pole of the second voltage stabilizing diode, the negative pole of the 3rd electric capacity, the other end of the time relay, the ground terminal of the second integrated circuit and the ground terminal of charger are connected, the described output terminal of the second integrated circuit is connected with the microphone input of mobile module, and two ends, described time relay contact are connected with the two ends of the voice mail button of mobile module.
2. power distribution network zero line excess current warning device according to claim 1, is characterized in that: described alarming horn is the high sound alarm loudspeaker of Alternating Current Power Supply; Described alarm lamp is the flashlamp of Alternating Current Power Supply.
3. power distribution network zero line excess current warning device according to claim 1, is characterized in that: described current transformer is the one in 5/30,5/50,5/100 or 5/300.
4. power distribution network zero line excess current warning device according to claim 1, is characterized in that: described charger is vehicle carried mobile phone charger circuit.
5. power distribution network zero line excess current warning device according to claim 1, is characterized in that: the model of described first integrated circuit is TWH8778 or TWH8752; Described second integrated circuit is the record/playback integrated circuit with alarm voice.
6. power distribution network zero line excess current warning device according to claim 1, is characterized in that: described button is closed type button.
7. power distribution network zero line excess current warning device according to claim 1, it is characterized in that: the resistance of described first resistance is 1M Ω, the resistance of the second resistance is 4.7K Ω, and the resistance of the 3rd resistance is 1K Ω; The resistance of described potentiometer is 100K Ω; The capacity of described first electric capacity is 0.47 μ F, and withstand voltage is 400-630V, and the capacity of the second electric capacity and the 3rd electric capacity is 100-470 μ F, and withstand voltage is 50V; The model of described first diode and the second diode is 1N4007; The voltage stabilizing value of described first voltage stabilizing diode is 1.6V, and the voltage stabilizing value of the second voltage stabilizing diode is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510427827.5A CN105092945A (en) | 2015-07-21 | 2015-07-21 | Zero-line overcurrent alarm device for power distribution network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510427827.5A CN105092945A (en) | 2015-07-21 | 2015-07-21 | Zero-line overcurrent alarm device for power distribution network |
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| CN105092945A true CN105092945A (en) | 2015-11-25 |
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| CN201510427827.5A Pending CN105092945A (en) | 2015-07-21 | 2015-07-21 | Zero-line overcurrent alarm device for power distribution network |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201219092Y (en) * | 2008-06-02 | 2009-04-08 | 比亚迪股份有限公司 | Ground fault interrupter |
| CN203071558U (en) * | 2012-12-26 | 2013-07-17 | 诸城市供电公司 | Multi-function distribution transformation overload intelligent protective device |
| CN204190353U (en) * | 2014-11-16 | 2015-03-04 | 毕然成 | A kind of household electrical appliance automatic overvoltage power off device |
-
2015
- 2015-07-21 CN CN201510427827.5A patent/CN105092945A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201219092Y (en) * | 2008-06-02 | 2009-04-08 | 比亚迪股份有限公司 | Ground fault interrupter |
| CN203071558U (en) * | 2012-12-26 | 2013-07-17 | 诸城市供电公司 | Multi-function distribution transformation overload intelligent protective device |
| CN204190353U (en) * | 2014-11-16 | 2015-03-04 | 毕然成 | A kind of household electrical appliance automatic overvoltage power off device |
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Application publication date: 20151125 |
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