CN203278221U - Power supply lightning arrester with neutral-ground voltage detection - Google Patents
Power supply lightning arrester with neutral-ground voltage detection Download PDFInfo
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- CN203278221U CN203278221U CN 201320289726 CN201320289726U CN203278221U CN 203278221 U CN203278221 U CN 203278221U CN 201320289726 CN201320289726 CN 201320289726 CN 201320289726 U CN201320289726 U CN 201320289726U CN 203278221 U CN203278221 U CN 203278221U
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Abstract
The utility model discloses a power supply lightning arrester with neutral-ground voltage detection, and the arrester comprises a plurality of discharging devices which are connected between a fire wire of a power supply and a zero line of the power supply. The arrester is characterized by also comprising a neutral-ground voltage detection alarm circuit which is connected between the zero line of the power supply and the ground. The neutral-ground voltage detection alarm circuit comprises a sampling circuit, a reference voltage circuit, a comparison drive circuit, and an alarm circuit. In the utility model, the neutral-ground voltage detection alarm circuit, consisting of the sampling circuit, the reference voltage circuit, the comparison drive circuit, the alarm circuit, is subtly disposed between the zero line of the power supply and the ground, so that the comparison drive circuit outputs a high electrical level to start the alarm circuit for warning when a neutral-ground voltage sampled by the sampling circuit exceeds a certain preset value, so as to remind an operator to rule out the alarmed fault. Moreover, the arrester is simple and reliable in structure, easy in enforcement, low in cost, and is applicable to various small machine rooms.
Description
Technical field
The utility model relates to a kind of power supply lightning arrester.
Background technology,
The impact of zero ground voltage on communication equipment is mainly manifested in: cause hardware fault, burn computer interface equipment; Cause the misoperation of control signal; Affect data transmission quality.Zero ground voltage can cause hardware damage when too high, and generally, zero ground voltage value can not surpass 2V.If zero ground voltage surpasses 2V, will cause that serial ports of computers hardware directly damages, also may cause the misoperation of control signal, cause error starting and the error cut-off machine of computer and data equipment.
Some little machine rooms (such as the mobile communication base station, bank outlets etc.) do not have the zero ground voltage checkout gear of specialty, cause that when loose contact or three-phase imbalance appear in zero line zero ground voltage is long-term when higher, and the equipment possible breakdown even damages.
Present power arrester only has lightning function simply, as shown in Figure 1, the combination of four piezo-resistance MOV or piezo-resistance MOV and discharge tube is connected in parallel on three live wires (L1, L2, L3) and a zero line (N) as discharge device, the other end ground connection G of discharge device, there is no zero ground voltage measuring ability, can not in time point out departing from of zero ground voltage.
Summary of the invention
The purpose of this utility model is for above-mentioned existing problems and deficiency, provide a kind of simple and reliable for structure, implement the lightning arrester that power supply zero ground voltage detects that has easy, with low cost.
The technical solution of the utility model is achieved in that
lightning arrester with power supply zero ground voltage detection described in the utility model, comprise that several are connected in the discharge device between power firestreak and zero-power line and ground, characterized by further comprising a zero ground voltage detection alarm circuit that is connected between zero-power line and ground, should comprise sample circuit by zero ground voltage detection alarm circuit, reference voltage circuit, compare drive circuit, warning circuit, wherein the input of sample circuit is connected between zero-power line and ground, its output output one has the direct voltage of identical magnitude of voltage to the first input end that compares drive circuit with zero-power line, the input of reference voltage circuit is connected in wherein between a power firestreak and zero-power line, the standard direct voltage of a 12V of its output output is given relatively the second input of drive circuit, relatively the output of drive circuit is connected with the input of warning circuit, the output of warning circuit connects the output of reference voltage circuit, when the output voltage of sample circuit during higher than a certain set point of output voltage of reference voltage circuit, relatively the drive circuit conducting also outputs to the input of warning circuit with the output voltage values of this sample circuit from its output, thereby start warning circuit output alarm information.
Above-mentioned sample circuit comprises that a transformation ratio is isolating transformer B1, diode D1, the capacitor C 1 of 1:1, wherein the input of isolating transformer B1 is connected between zero-power line and ground, the output series diode D1 of isolating transformer B1 and the rear ground connection of capacitor C 1, and extremely compare the first input end of drive circuit from the negative terminal output sampled voltage VIN of diode D1.
above-mentioned relatively drive circuit comprises comparator IC1 and switch triode T1, resistance R 1, resistance R 2, resistance R 3, wherein connect the sample circuit output after the first input end series resistor R1 of comparator IC1, connect the output of reference voltage circuit after the second input series resistor R2 of comparator IC1, and be serially connected with an adjustable partial pressure resistance VR1 between the tie point place of resistance R 2 and this second input and ground, the base stage of connecting valve triode T1 after the output series resistor R3 of comparator IC1, the collector electrode of switch triode T1 connects the output of reference voltage circuit, the reflector of switch triode T1 connects the input of warning circuit.
Above-mentioned warning circuit comprises sound indicating circuit and the light indicating circuit that is connected in parallel, and wherein is series at after sound indicating circuit and the parallel connection of light indicating circuit between the output of the output of comparison drive circuit and reference voltage circuit.
The utility model is due to a zero ground voltage detection alarm circuit that is comprised of sample circuit, comparison drive circuit, warning circuit etc. being set between zero-power line and ground dexterously, when sample circuit samples zero ground voltage over a certain set point, by comparing drive circuit output one high level, warning circuit is started carry out alarm, thereby the prompting operator is arranged alert the processing to machine room, and the utility model is simple and reliable for structure, enforcement is easy, cost is low, is suitable for all kinds of small rooms and uses.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 is existing power arrester structural representation.
Fig. 2 is structural representation of the present utility model.
Embodiment
as shown in Figure 2, lightning arrester with power supply zero ground voltage detection described in the utility model, comprise that several are connected in the discharge device between power firestreak and zero-power line and ground, characterized by further comprising a zero ground voltage detection alarm circuit that is connected between zero-power line and ground, should comprise sample circuit by zero ground voltage detection alarm circuit, reference voltage circuit, compare drive circuit, warning circuit, wherein the input of sample circuit is connected between zero-power line and ground, its output output one has the direct voltage of identical magnitude of voltage to the first input end that compares drive circuit with zero-power line, the input of reference voltage circuit is connected in wherein between a power firestreak and zero-power line, the standard direct voltage of a 12V of its output output is given relatively the second input of drive circuit, relatively the output of drive circuit is connected with the input of warning circuit, the output of warning circuit connects the output of reference voltage circuit, when the output voltage of sample circuit during higher than a certain set point of output voltage of reference voltage circuit, relatively the drive circuit conducting also outputs to the input of warning circuit with the output voltage values of this sample circuit from its output, thereby start warning circuit output alarm information.Wherein, above-mentioned discharge device is the combination of piezo-resistance or piezo-resistance and discharge tube.Above-mentioned sample circuit comprises that a transformation ratio is isolating transformer B1, diode D1, the capacitor C 1 of 1:1, wherein the input of isolating transformer B1 is connected between zero-power line and ground, the output series diode D1 of isolating transformer B1 and the rear ground connection of capacitor C 1, and extremely compare the first input end of drive circuit from the negative terminal output sampled voltage VIN of diode D1.above-mentioned relatively drive circuit comprises comparator IC1 and switch triode T1, resistance R 1, resistance R 2, resistance R 3, wherein connect the sample circuit output after the first input end series resistor R1 of comparator IC1, connect the output of reference voltage circuit after the second input series resistor R2 of comparator IC1, and be serially connected with an adjustable partial pressure resistance VR1 between the tie point place of resistance R 2 and this second input and ground, the base stage of connecting valve triode T1 after the output series resistor R3 of comparator IC1, the collector electrode of switch triode T1 connects the output of reference voltage circuit, the reflector of switch triode T1 connects the input of warning circuit.Above-mentioned warning circuit comprises sound indicating circuit and the light indicating circuit that is connected in parallel, and wherein is series at after sound indicating circuit and the parallel connection of light indicating circuit between the output of the output of comparison drive circuit and reference voltage circuit.Wherein the sound indicating circuit in the present embodiment is a buzzer BZ1, and the light indicating circuit is for to be composed in series by LED and resistance R 4.Reference voltage circuit in the present embodiment can adopt existing direct current regulation circuit, in the present embodiment, supply transformer obtains the 12V power supply from power supply one live wire and zero line, through the 12V direct voltage of stable output after supply transformer B2, diode D2, capacitor C 2, C3, pressurizer IC2, supply with comparator IC1 and warning circuit.IC2 is three terminal regulator.The reference voltage V O of comparator is by R2 and VR1 dividing potential drop, obtains from the output of pressurizer IC2, regulates VR1 and can make warning circuit report to the police when zero ground voltage surpasses a certain set point such as 2V.
Operation principle of the present utility model is as follows:
The combination of four piezo-resistance MOV or piezo-resistance MOV and discharge tube is connected in parallel on three live wires (L1, L2, L3) and a zero line (N) as discharge device, the other end ground connection G of MOV, its lightning-arrest operation principle is identical with common lightning arrester, when the Lightning Over-voltage on power circuit surpassed the starting resistor of MOV, the MOV action discharged into ground G.
The isolating transformer B1 of voltage process 1:1 between zero line and ground wire becomes direct voltage VIN to the sample circuit of D1 and C1 composition, and R1 is current-limiting resistance.This direct voltage V1N delivers to "+" input of comparator IC1.
Supply transformer B2 obtains the 12V power supply from power line, through the 12V direct voltage of stable output after D2, C2, IC2, C3, supplies with comparator and warning circuit.IC2 is three terminal regulator.
The reference voltage V O of comparator is by R2 and VR1 dividing potential drop, obtains from the output of pressurizer IC2, regulates VR1 and can make alarm surpass a certain set point such as 2V alarm at zero ground voltage.
Reference voltage is delivered to comparator "-" end, VO and VIN contrast, if sampled voltage VIN greater than VO comparator is exported high level, makes switch triode T1 conducting by R3, after conducting, LED is bright, and buzzer BZ1 sends chimes of doom.
The utility model is described by embodiment, but the utility model is not construed as limiting, with reference to description of the present utility model, other variations of the disclosed embodiments, easily expect as the professional person for this area, within such variation should belong to the utility model claim restricted portion.
Claims (5)
1. one kind has the lightning arrester that power supply zero ground voltage detects, comprise that several are connected in the discharge device between power firestreak and zero-power line and ground, characterized by further comprising a zero ground voltage detection alarm circuit that is connected between zero-power line and ground, should comprise sample circuit by zero ground voltage detection alarm circuit, reference voltage circuit, compare drive circuit, warning circuit, wherein the input of sample circuit is connected between zero-power line and ground, its output output one has the direct voltage of identical magnitude of voltage to the first input end that compares drive circuit with zero-power line, the input of reference voltage circuit is connected in wherein between a power firestreak and zero-power line, the standard direct voltage of a 12V of its output output is given relatively the second input of drive circuit, relatively the output of drive circuit is connected with the input of warning circuit, the output of warning circuit connects the output of reference voltage circuit, when the output voltage of sample circuit during higher than a certain set point of output voltage of reference voltage circuit, relatively the drive circuit conducting also outputs to the input of warning circuit with the output voltage values of this sample circuit from its output, thereby start warning circuit output alarm information.
2. have according to claim 1 the lightning arrester that power supply zero ground voltage detects, it is characterized in that above-mentioned discharge device is the combination of piezo-resistance or piezo-resistance and discharge tube.
3. has according to claim 1 the lightning arrester that power supply zero ground voltage detects, it is characterized in that above-mentioned sample circuit comprises that a transformation ratio is isolating transformer B1, diode D1, the capacitor C 1 of 1:1, wherein the input of isolating transformer B1 is connected between zero-power line and ground, the output series diode D1 of isolating transformer B1 and the rear ground connection of capacitor C 1, and extremely compare the first input end of drive circuit from the negative terminal output sampled voltage VIN of diode D1.
4. has according to claim 1 the lightning arrester that power supply zero ground voltage detects, it is characterized in that above-mentioned relatively drive circuit comprises comparator IC1 and switch triode T1, resistance R 1, resistance R 2, resistance R 3, wherein connect the sample circuit output after the first input end series resistor R1 of comparator IC1, connect the output of reference voltage circuit after the second input series resistor R2 of comparator IC1, and be serially connected with an adjustable partial pressure resistance VR1 between the tie point place of resistance R 2 and this second input and ground, the base stage of connecting valve triode T1 after the output series resistor R3 of comparator IC1, the collector electrode of switch triode T1 connects the output of reference voltage circuit, the reflector of switch triode T1 connects the input of warning circuit.
5. has according to claim 1 the lightning arrester that power supply zero ground voltage detects, it is characterized in that above-mentioned warning circuit comprises sound indicating circuit and the light indicating circuit that is connected in parallel, wherein be series at after sound indicating circuit and the parallel connection of light indicating circuit between the output of the output of comparison drive circuit and reference voltage circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320289726 CN203278221U (en) | 2013-05-24 | 2013-05-24 | Power supply lightning arrester with neutral-ground voltage detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320289726 CN203278221U (en) | 2013-05-24 | 2013-05-24 | Power supply lightning arrester with neutral-ground voltage detection |
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| CN203278221U true CN203278221U (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320289726 Expired - Fee Related CN203278221U (en) | 2013-05-24 | 2013-05-24 | Power supply lightning arrester with neutral-ground voltage detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168635A (en) * | 2016-08-29 | 2016-11-30 | 天津市百利电气有限公司 | Electric power system part-loading goods measurement apparatus and control method |
| CN107144724A (en) * | 2017-05-22 | 2017-09-08 | 广州市徕信电子科技有限公司 | A kind of arrester real time and on line monitoring method |
-
2013
- 2013-05-24 CN CN 201320289726 patent/CN203278221U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168635A (en) * | 2016-08-29 | 2016-11-30 | 天津市百利电气有限公司 | Electric power system part-loading goods measurement apparatus and control method |
| CN107144724A (en) * | 2017-05-22 | 2017-09-08 | 广州市徕信电子科技有限公司 | A kind of arrester real time and on line monitoring method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20160524 |
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| CF01 | Termination of patent right due to non-payment of annual fee |