CN204330874U - Protective relaying device pressing plate device for detecting polarity - Google Patents
Protective relaying device pressing plate device for detecting polarity Download PDFInfo
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- CN204330874U CN204330874U CN201420774813.1U CN201420774813U CN204330874U CN 204330874 U CN204330874 U CN 204330874U CN 201420774813 U CN201420774813 U CN 201420774813U CN 204330874 U CN204330874 U CN 204330874U
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Abstract
The utility model relates to a kind of protective relaying device pressing plate device for detecting polarity, comprise: high internal resistance voltage acquisition module, analog to digital converter, controller, hummer module, indicating lamp module, display module and selector switch, wherein, the described high output terminal of internal resistance voltage acquisition module is connected with the input end of analog to digital converter, the output terminal of described analog to digital converter is connected with the input end of controller, and the first output terminal of described controller is connected with hummer module; Second output terminal of described controller is connected with indicating lamp module; 3rd output terminal of described controller is connected with display module; Described selector switch is connected with the control end of described controller.The utility model can effectively prevent the situation connecting protective relaying device switching manipulation loop, thus avoids the situation causing trip accident in the middle of the process detecting pressing plate polarity, and then ensures power grid security.
Description
[technical field]
The utility model relates to protective relaying device detection technique, particularly relates to a kind of protective relaying device pressing plate device for detecting polarity.
[background technology]
In the middle of the use procedure of protective relaying device, for preventing the pressing plate of relay protection device when dropping into, cause power equipment mistrip accident.Therefore, before input pressing plate, with the high upper port of internal resistance voltage table measuring pressure plate and the current potential of lower port, only after upper port and lower port are as good as polar voltages, pressing plate can need be dropped into.
At present in substation operation work, site operation personnel generally uses multimeter voltage gear to test pressing plate both end voltage, during the voltage of measuring pressure plate upper port and lower port, gear must be got to shelves of direct voltage, but in practical operation, because the gear of multimeter is more, site operation personnel easily misuses multimeter gear.When gear is misused; be equivalent to the switching manipulation loop of being connected by multimeter into protective relaying device; thus by the conducting of switching manipulation loop; the internal resistance of reometer is very little; dividing potential drop and metering function limited; cause switching manipulation loop to have enough large electric current by switch sending action, make protective relaying device occur malfunction, thus cause trip accident.
[utility model content]
Based on this, be necessary, for using the problem easily causing protective relaying device malfunction during multimeter measuring pressure plate upper and lower port current potential at present, to provide a kind of protective relaying device pressing plate device for detecting polarity.
A kind of protective relaying device pressing plate device for detecting polarity, comprising:
High internal resistance voltage acquisition module, analog to digital converter, controller, hummer module, indicating lamp module, display module and selector switch, wherein, the described high output terminal of internal resistance voltage acquisition module is connected with the input end of analog to digital converter, the output terminal of described analog to digital converter is connected with the input end of controller, and the first output terminal of described controller is connected with hummer module; Second output terminal of described controller is connected with indicating lamp module; 3rd output terminal of described controller is connected with display module; Described selector switch is connected with the control end of described controller.
The analog voltage of collection, by a voltage acquisition module, is transported to analog to digital converter, by analog to digital converter, described analog voltage is converted to digital voltage, then described digital voltage is flowed to controller by the utility model.Make controller can control display module and show described digital voltage, make controller to show the polarity of described digital voltage by indicating lamp module and to control hummer when tested pressing plate upper port is different from lower port polarity and give the alarm equally.The utility model can effectively prevent the situation connecting protective relaying device switching manipulation loop, thus avoids the situation causing trip accident in the middle of the process detecting pressing plate polarity, and then ensures power grid security.
[accompanying drawing explanation]
Fig. 1 is the structural representation of a kind of embodiment of a kind of protective relaying device of the utility model pressing plate device for detecting polarity;
Fig. 2 is the electrical block diagram of a kind of embodiment of voltage acquisition module in a kind of protective relaying device of the utility model pressing plate device for detecting polarity;
Fig. 3 is the electrical block diagram of voltage acquisition module preferred embodiment in a kind of protective relaying device pressing plate of the utility model device for detecting polarity.
[embodiment]
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail.
Refer to Fig. 1, it is the structural representation of a kind of embodiment of a kind of protective relaying device of the utility model pressing plate device for detecting polarity.
A kind of protective relaying device pressing plate device for detecting polarity, comprise: high internal resistance voltage acquisition module 101, analog to digital converter 102, controller 104, hummer module 105, indicating lamp module 106, display module 107 and selector switch 103, wherein, the output terminal of described high internal resistance voltage acquisition module 101 is connected with the input end of analog to digital converter 102, the output terminal of described analog to digital converter 102 is connected with the input end of controller 104, and the first output terminal of described controller 104 is connected with hummer module 105; Second output terminal of described controller 104 is connected with indicating lamp module 106; 3rd output terminal of described controller 104 is connected with display module 107; Described selector switch 103 is connected with the control end of described controller 104.
Preferably, described indicating lamp module 106 comprises the first pilot lamp and the second pilot lamp, wherein said first pilot lamp is connected with the first output interface of described controller 104 second output terminal, and described second pilot lamp is connected with the second output interface of described controller 104 second output terminal.
The analog voltage of collection, by a voltage acquisition module, is transported to analog to digital converter 102, by analog to digital converter 102, described analog voltage is converted to digital voltage, then described digital voltage is flowed to controller 104 by the utility model.When user test during one of them digital voltage of pressing plate upper port or lower port, controller 104 can show the polarity of described digital voltage by indicating lamp module 106, user presses selector switch 103, can control controller 104 and store described control voltage.After the digital voltage of another port is transferred to controller 104, controller 104 can control display module 107 and show described digital voltage, makes and control hummer when tested pressing plate upper port is different from lower port polarity to give the alarm.The utility model can effectively prevent the situation connecting protective relaying device switching manipulation loop, thus avoids the situation causing trip accident in the middle of the process detecting pressing plate polarity, and then ensures power grid security.
Refer to Fig. 2, the electrical block diagram of a kind of embodiment of voltage acquisition module in a kind of protective relaying device of its utility model pressing plate device for detecting polarity.
Described high internal resistance voltage acquisition module 101 comprises the first indicator interface 201, second indicator interface 202, current-limiting resistance R1, current-limiting resistance R2, sampling resistor R3 and operational amplifier 203; Preferably, the model of described operational amplifier 203 is AD620BR.
Described first indicator interface 201, current-limiting resistance R1, sampling resistor R3, current-limiting resistance R2 and the second indicator interface 202 are connected successively;
Described sampling resistor R3 two ends are connected with reverse input end with the positive input of operational amplifier 203 respectively, and by one end ground connection of sampling resistor R3; The output terminal of described operational amplifier 203 is connected with the input end of analog to digital converter 102.
Preferably, current-limiting resistance R1 is 3.3M Ω, and current-limiting resistance R2 is 5.6M Ω.
When the first indicator interface 201 or the second indicator interface 202 are linked into dual-port or the lower port of pressing plate; suppose that the voltage that the first indicator interface 201 and the second indicator interface 202 access is U; then electric current I=the U/ (R1+R2+R3) of whole series loop; so electric current I is fainter, protective relaying device malfunction can not be caused.Gather one end ground connection of resistance R3, serve the effect on common ground, if measurement is not gone out result without this earth point, this point is as voltage reference points simultaneously, when earth point as shown in Figure 2 time, when the second indicator interface 202 current potential is higher than the first indicator interface 201, testing result is positive voltage, otherwise is negative voltage.Therefore; as long as by one of them indicator interfacing ground in the first indicator interface 201 or the second indicator interface 202 in the utility model; and the upper port of another indicator interface and pressing plate or lower port are connected; voltage swing and the polarity of voltage of upper port or lower port can be collected, user can be facilitated to detect the charged situation of protective relaying device pressing plate upper and lower port.In addition, utilize the characteristic of operational amplifier 203 high input impedance low output impedance, use high internal resistance voltage acquisition module 101 load capacity that a Special instrument operational amplifier 203 improves, prevent analog to digital converter 102 on the impact gathering resistance R3 both end voltage, cause measuring error, improve measuring accuracy.
Refer to Fig. 3, it is the electrical block diagram of voltage acquisition module preferred embodiment in a kind of protective relaying device pressing plate of the utility model device for detecting polarity.
Described high internal resistance voltage acquisition module 101 also comprises: current-limiting resistance R4, current-limiting resistance R5 and bi-directional voltage stabilizing pipe 204; The reverse input end of wherein said current-limiting resistance R4 two ends difference concatenation operation amplifier 203 and sampling resistor R3; The positive input of described current-limiting resistance R5 two ends difference concatenation operation amplifier 203 and sampling resistor R3; The positive input of described bi-directional voltage stabilizing pipe 204 difference two ends difference concatenation operation amplifier 203 and reverse input end.
Current-limiting resistance R4, current-limiting resistance R5 and bi-directional voltage stabilizing pipe 204 can be protected the input of operational amplifier 203, prevent the input voltage of operational amplifier 203 excessive and damage operational amplifier 203.
Further, described high internal resistance voltage acquisition module 101 also comprises: current-limiting resistance R6, diode D1 and diode D2; The output terminal of one end concatenation operation amplifier 203 of described current-limiting resistance R6, the other end connects the input end of the positive pole of diode D1, the negative pole of diode D2 and analog to digital converter 102 respectively; The negative pole of described diode D1 is connected with direct supply, the plus earth of described diode D2.
Diode D1 and diode D2 can shield to output, is limited in by output voltage between-0.6V to+5.1V, prevents operational amplifier 203 output voltage from exceeding the withstand voltage scope of analog to digital converter 102.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a protective relaying device pressing plate device for detecting polarity, is characterized in that, comprising:
High internal resistance voltage acquisition module, analog to digital converter, controller, hummer module, indicating lamp module, display module and selector switch, wherein, the described high output terminal of internal resistance voltage acquisition module is connected with the input end of analog to digital converter, the output terminal of described analog to digital converter is connected with the input end of controller, and the first output terminal of described controller is connected with hummer module; Second output terminal of described controller is connected with indicating lamp module; 3rd output terminal of described controller is connected with display module; Described selector switch is connected with the control end of described controller.
2. protective relaying device pressing plate device for detecting polarity according to claim 1, it is characterized in that, described high internal resistance voltage acquisition module comprises the first indicator interface, the second indicator interface, current-limiting resistance R1, current-limiting resistance R2, sampling resistor R3 and operational amplifier;
Described first indicator interface, current-limiting resistance R1, sampling resistor R3, current-limiting resistance R2 and the second indicator interface are connected successively;
Described sampling resistor R3 two ends are connected with reverse input end with the positive input of operational amplifier respectively, and by one end ground connection of sampling resistor R3; The output terminal of described operational amplifier is connected with the input end of analog to digital converter.
3. protective relaying device pressing plate device for detecting polarity according to claim 2, is characterized in that, described high internal resistance voltage acquisition module also comprises: current-limiting resistance R4, current-limiting resistance R5 and bi-directional voltage stabilizing pipe; The reverse input end of wherein said current-limiting resistance R4 two ends difference concatenation operation amplifier and sampling resistor R3; The positive input of described current-limiting resistance R5 two ends difference concatenation operation amplifier and sampling resistor R3; The positive input of described bi-directional voltage stabilizing pipe difference two ends difference concatenation operation amplifier and reverse input end.
4. the protective relaying device pressing plate device for detecting polarity according to the arbitrary claim of Claims 2 or 3, is characterized in that, described high internal resistance voltage acquisition module also comprises: current-limiting resistance R6, diode D1 and diode D2; The output terminal of one end concatenation operation amplifier of described current-limiting resistance R6, the other end connects the positive pole of diode D1, the negative pole of diode D2 and the input end of analog to digital converter respectively; The negative pole of described diode D1 is connected with direct supply, the plus earth of described diode D2.
5. protective relaying device pressing plate device for detecting polarity according to claim 1; it is characterized in that; described indicating lamp module comprises the first pilot lamp and the second pilot lamp; wherein said first pilot lamp is connected with the first output interface of described controller second output terminal, and described second pilot lamp is connected with the second output interface of described controller second output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774813.1U CN204330874U (en) | 2014-12-09 | 2014-12-09 | Protective relaying device pressing plate device for detecting polarity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774813.1U CN204330874U (en) | 2014-12-09 | 2014-12-09 | Protective relaying device pressing plate device for detecting polarity |
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| CN204330874U true CN204330874U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420774813.1U Active CN204330874U (en) | 2014-12-09 | 2014-12-09 | Protective relaying device pressing plate device for detecting polarity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838560A (en) * | 2020-12-31 | 2021-05-25 | 广东电网有限责任公司佛山供电局 | Device for controlling input and exit of outlet pressure plate |
| CN115112970A (en) * | 2022-05-27 | 2022-09-27 | 国网江苏省电力有限公司南通供电分公司 | Method and system for monitoring state of pressure plate at outlet of relay protection operation loop |
-
2014
- 2014-12-09 CN CN201420774813.1U patent/CN204330874U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112838560A (en) * | 2020-12-31 | 2021-05-25 | 广东电网有限责任公司佛山供电局 | Device for controlling input and exit of outlet pressure plate |
| CN115112970A (en) * | 2022-05-27 | 2022-09-27 | 国网江苏省电力有限公司南通供电分公司 | Method and system for monitoring state of pressure plate at outlet of relay protection operation loop |
| CN115112970B (en) * | 2022-05-27 | 2023-12-22 | 国网江苏省电力有限公司南通供电分公司 | Method and system for monitoring state of outlet pressing plate of relay protection operation loop |
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