CN202693726U - Detection circuit and detection system for electric transmission and transformation equipment - Google Patents
Detection circuit and detection system for electric transmission and transformation equipment Download PDFInfo
- Publication number
- CN202693726U CN202693726U CN201220415143.5U CN201220415143U CN202693726U CN 202693726 U CN202693726 U CN 202693726U CN 201220415143 U CN201220415143 U CN 201220415143U CN 202693726 U CN202693726 U CN 202693726U
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- power transmission
- testing circuit
- transforming equipment
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Abstract
The utility model discloses a detection circuit and detection system for electric transmission and transformation equipment. The circuit comprises a power supply, a shunting device, and a current indicating device. One end of the power supply is grounded; and the power supply is used for supplying power. The first end of the shunting device is connected with an electric transmission and transformation circuit of the grounding terminal of the electric transmission and transformation equipment by the current indicating device; and the second end thereof is connected with the other end of the power supply. The first end of the current indicating device is connected with the first end of the shunting device and the second end thereof is connected with the electric transmission and transformation circuit; and the current indicating device is used for detecting the currents of the shunting device. When the current of the shunting device is zero, the electric transmission and transformation equipment is in a secure state. According to the detection circuit and detection system for electric transmission and transformation equipment provided by the utility model, the detection circuit is arranged at the electric transmission and transformation circuit of the grounding terminal of the electric transmission and transformation equipment and thus whether a grounding device is removed or not can be determined, so that secure power transmission after the completion of the electric transmission and transformation equipment maintenance can be realized and thus the security of the equipment and the personnel can be ensured.
Description
Technical field
The utility model relates to detection field, in particular to a kind of power transmission and transforming equipment testing circuit and system.
Background technology
At present, transmission line of electricity, power transformation and controller switching equipment are overhauled or repairing work before, grounding switch in the relevant work scope of must closing or installing ground wire are to ensure relevant staff's personal safety, the generation that brings human casualty accident to prevent from sending electricity suddenly in the scope of repair.After be correlated with maintenance or repairing work are finished and before sending electricity to transmission line of electricity, power transformation and controller switching equipment combined floodgate, must check grounding switch whether all to pull open or ground wire complete removal whether, if grounding switch does not all pull open or ground wire does not have complete removal, there is earth point to exist in the electric scope if namely send, will directly power supply be connected in short circuit or direct ground state, thereby may cause switching on earth wire and the generation of the electric power safety industrial accident that brings.
Under the existence conditions, prevent that the main way of switching on earth wire from being to strengthen management, make a record and checking and accepting, the staff can only rely on record, judges and examine the ground wire that could find omission.Before combined floodgate send electricity after electric power overhaul work is finished, the staff finishes pulling open and the dismounting work of ground wire corresponding grounding switch according to operation order, confirming that whole grounding switchs pull open and ground wire is removed can close a floodgate after errorless and sent electricity, in this process, the staff finishes a place according to operation order and checks a place, this mode mainly relies on record, judgement and visual inspection realize, if but the staff lacks a sense of responsibility, inadvertent, may omit the earthing device such as corresponding ground wire or grounding switch, there is earth point to exist in the electric scope thereby cause to send, and then causes the generation of switching on earth wire to cause the accident.
For in the prior art after power transmission and transforming equipment is finished maintenance, remove and to have the switching on earth wire omitting and cause in the earthing device process to cause the problem of security incident, effective solution is not yet proposed at present.
The utility model content
For correlation technique after power transmission and transforming equipment is finished maintenance, the switching on earth wire that has omission in the dismounting earthing device process and cause is to cause the problem of security incident, effective solution is not yet proposed at present, for this reason, fundamental purpose of the present utility model is to provide a kind of power transmission and transforming equipment testing circuit and system, to address the above problem.
To achieve these goals, according to an aspect of the present utility model, provide a kind of power transmission and transforming equipment testing circuit, this circuit comprises: power supply, and an end ground connection is used for providing electric energy; Part flow arrangement, first end connects by the power transmission and transformation circuit of current indicator and power transmission and transforming equipment earth terminal, and the other end of the second end and power supply connects; Current indicator, first end is connected with the first end of part flow arrangement, and the second end and power transmission and transformation circuit connect, and for detection of the electric current of part flow arrangement, when the electric current of part flow arrangement was zero, power transmission and transforming equipment was in a safe condition.
Further, testing circuit also comprises: single-pole switch, and first end is connected with the second end of current indicator, and the second end is connected with the power transmission and transformation circuit.
Further, power supply is direct supply.
Further, direct supply is the direct supply that is less than or equal to 36V.
Further, part flow arrangement comprises shunt resistance.
Further, current indicator comprises multimeter.
Further, current indicator comprises the integrated current indicator.
To achieve these goals, according on the other hand of the present utility model, provide a kind of power transmission and transforming equipment detection system, this comprises: testing circuit; Power transmission and transforming equipment, power transmission and transformation circuit and the testing circuit of earth terminal connect; And earthing device, be connected in parallel with testing circuit.
By power transmission and transforming equipment testing circuit of the present utility model and system, power transmission and transformation circuit at the power transmission and transforming equipment earth terminal arranges testing circuit, judge testing circuit by the electric current to the part flow arrangement of testing circuit, whether power transmission and transformation circuit and earthing device form is detected the loop, thereby judge whether earthing device is removed, if earthing device is for removing fully, then remove earthing device, solved in the prior art after power transmission and transforming equipment is finished maintenance, the switching on earth wire that has omission in the dismounting earthing device process and cause is to cause the problem of security incident, realized after power transmission and transforming equipment is finished maintenance, remove the technique effect of earthing device fully, thereby realize that safety is sent electricity after the power transmission and transforming equipment maintenance is finished, and then guaranteed equipment and personnel's security.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation according to the power transmission and transforming equipment testing circuit of the utility model embodiment;
Fig. 2 is the structural representation according to the power transmission and transforming equipment testing circuit of embodiment shown in Figure 1;
Fig. 3 is the structural representation according to the power transmission and transforming equipment testing circuit of another embodiment shown in Figure 1; And
Fig. 4 is the structural representation according to the power transmission and transforming equipment detection system of the utility model embodiment.
Embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Fig. 1 is the structural representation according to the power transmission and transforming equipment testing circuit of the utility model embodiment.As shown in Figure 1, power transmission and transformation testing circuit of the present utility model comprises: also comprise: power supply 10, one end ground connection are used for providing electric energy; Part flow arrangement 30, first end connects by the power transmission and transformation circuit 70 of current indicator 50 with the power transmission and transforming equipment earth terminal, and the other end of the second end and power supply 10 connects; Current indicator 50, first end is connected with the first end of part flow arrangement 30, and the second end and power transmission and transformation circuit connect, and for detection of the electric current of part flow arrangement 30, when the electric current of part flow arrangement 30 was zero, power transmission and transforming equipment was in a safe condition.
The power transmission and transforming equipment testing circuit that adopts the utility model to provide, provide electric energy by power supply for this testing circuit, the first end of part flow arrangement and power transmission and transformation circuit connect, the other end of the second end and power supply connects, then current indicator is connected between the power transmission and transformation circuit of part flow arrangement and power transmission and transforming equipment earth terminal, the testing circuit that the utility model provides and power transmission and transformation circuit and the earthing device that arranges for maintenance form a test loop, before combined floodgate send electricity, power transmission and transforming equipment is detected, when the electric current of the part flow arrangement that detects when current indicator is zero, this testing circuit is described, power transmission and transformation circuit and earthing device can not form the loop, then grounding switch pulls open or connects wires and removes and do not have earth point to exist in sending electric scope, and power transmission and transforming equipment is in a safe condition; When the electric current of the part flow arrangement that detects when current indicator is non-zero, illustrate that testing circuit, power transmission and transformation circuit and earthing device form the loop, then earthing device is not removed fully and is had earth point to exist in sending electric scope, and power transmission and transforming equipment is in unsafe state.The utility model arranges testing circuit by the earth terminal at power transmission and transforming equipment, judge testing circuit by the electric current to the part flow arrangement of testing circuit, whether power transmission and transformation circuit and earthing device form is detected the loop, thereby judge whether earthing device is removed, if earthing device is for removing fully, then remove earthing device, solved in the prior art after power transmission and transforming equipment is finished maintenance, the switching on earth wire that has omission in the dismounting earthing device process and cause is to cause the problem of security incident, realized after power transmission and transforming equipment is finished maintenance, remove the technique effect of earthing device fully, thereby realize that safety is sent electricity after the power transmission and transforming equipment maintenance is finished, and then guaranteed equipment and personnel's security.
Fig. 2 is the structural representation according to the power transmission and transforming equipment testing circuit of embodiment shown in Figure 1.Fig. 3 is the structural representation according to the power transmission and transforming equipment testing circuit of another embodiment shown in Figure 1.
Shown in Fig. 2 and 3, in above-described embodiment of the application, power transmission and transforming equipment can be transmission line of electricity, power transformation and controller switching equipment, and earthing device can be grounding switch or ground path.Particularly, in the embodiment shown in Figure 2, power transmission and transforming equipment is transmission line of electricity, and earthing device can be ground path, and embodiment shown in Figure 2 is arranged on testing circuit the earth terminal of transmission line of electricity; In the embodiment shown in fig. 3, power transmission and transforming equipment is converting equipment, earthing device can be grounding switch, embodiment shown in Figure 3 is arranged on testing circuit the earth terminal of converting equipment A, B, C three-phase, judges that by the electric current that detects the shunt resistance in the part flow arrangement 30 the resistance situation of the power transmission and transformation circuit of transmission line of electricity and power transmission and transforming equipment earth terminal judges whether ground wire is removed.Wherein, in the embodiment shown in fig. 3, can measure respectively A, B, the C three-phase of converting equipment.
Particularly, when power transmission and transformation circuit 70 ground connection, power supply 10, part flow arrangement 30, power transmission and transformation circuit 70 have consisted of measuring circuit with earthing device, because the stake resistance of power transmission and transformation circuit 70 is less, when current indicator 50 has obvious electric current indication, can judge that still there is earth point in power transmission and transformation circuit 70, when the earthing device of power transmission and transformation circuit 70 is removed fully, power supply 10 can't consist of the loop with part flow arrangement 30, the electric current of current indicator 50 indications is approximately 0, and can judge that there are not earth point in transmission line of electricity or converting equipment this moment.accurately judge send whether have earth point in the electric scope after, if there is no earth point can directly send electricity; If there is earth point, with sending electricity after the earth point dismounting, realized after power transmission and transforming equipment is finished maintenance, remove earthing device fully, thereby safety is sent electricity.
In above-described embodiment of the present utility model, testing circuit also comprises: single-pole switch, and first end is connected with the second end of current indicator 50, and the second end is connected with power transmission and transformation circuit 70.As shown in Figure 2, by between current indicator 50 and power transmission and transformation circuit 70, single-pole switch being set, can when the staff need to use testing circuit, with switch closure, strengthen the security of testing circuit.
According to above-described embodiment of the present utility model, the power supply 10 in this testing circuit is direct supplys.Embodiment shown in Fig. 2 and 3, the power supply 10 in the testing circuit is direct supply.
In the above-described embodiments, direct supply is the direct supply that is less than or equal to 36V.The direct supply that is less than or equal to 36V is the human safety voltage, and adopting the direct supply that is less than or equal to 36V in this test circuit is in order to prevent that survey crew from getting an electric shock, and strengthened the security of testing circuit further.
According to above-described embodiment of the present utility model, part flow arrangement 30 comprises shunt resistance.Because the stake resistance of power transmission and transformation circuit 70 is generally in 10 ohm, adopt size and 10 ohm of suitable resistance in the part flow arrangement 30, the electric current of the part flow arrangement 30 that current indicator 50 detects is more accurate, and shunt resistance is generally got several ohm to 10 ohm small resistor.
In above-described embodiment of the present utility model, current indicator 50 can comprise multimeter, and for the electric current that makes the part flow arrangement 30 that detects is more accurate, current indicator 50 can also comprise the integrated current indicator.
Fig. 4 is the structural representation according to the power transmission and transforming equipment detection system of the utility model embodiment.As shown in Figure 4, the application provides a kind of power transmission and transforming equipment detection system, and this system comprises: the testing circuit shown in above-described embodiment; Power transmission and transforming equipment, power transmission and transformation circuit and the testing circuit of its earth terminal connect; And earthing device 90, be connected in parallel with testing circuit 1.
The power transmission and transforming equipment detection system that adopts the utility model to provide, testing circuit, power transmission and transformation circuit and the earthing device in parallel with testing circuit form one and detect the loop, power supply in the testing circuit provides electric energy for this circuit, part flow arrangement first end in the testing circuit and the power transmission and transformation circuit of power transmission and transforming equipment earth terminal connect, the other end of the second end and power supply connects, then current indicator is connected between part flow arrangement and the power transmission and transformation circuit, the testing circuit that the utility model provides and power transmission and transformation circuit and the earthing device that arranges for maintenance form a test loop, before combined floodgate send electricity, power transmission and transforming equipment is detected, when the electric current of the part flow arrangement that detects is zero, testing circuit is described, power transmission and transformation circuit and earthing device can not form the loop, then earthing device is removed fully, and in sending electric scope, not having earth point to exist, power transmission and transforming equipment is in a safe condition; When the electric current of the part flow arrangement that detects is non-zero, illustrate that testing circuit, power transmission and transformation circuit and earthing device form the loop, then earthing device is not removed fully and is had earth point to exist in sending electric scope, and power transmission and transforming equipment is in unsafe state.The utility model arranges testing circuit by the earth terminal at power transmission and transforming equipment, judge testing circuit by the electric current to the part flow arrangement of testing circuit, whether power transmission and transformation circuit and earthing device form is detected the loop, thereby judge whether earthing device is removed, if earthing device is for removing fully, then remove earthing device, solved in the prior art after power transmission and transforming equipment is finished maintenance, the switching on earth wire that has omission in the dismounting earthing device process and cause is to cause the problem of security incident, realized after power transmission and transforming equipment is finished maintenance, remove the technique effect of earthing device fully, thereby realize that safety is sent electricity after the power transmission and transforming equipment maintenance is finished, and then guaranteed equipment and personnel's security.
From above description, can find out, the utility model has been realized following technique effect: the power transmission and transforming equipment testing circuit and the system that adopt the utility model to provide form one with testing circuit, power transmission and transformation circuit and the earthing device in parallel with testing circuit and detect the loop.The utility model arranges testing circuit by the earth terminal at power transmission and transforming equipment, judge testing circuit by the electric current to the part flow arrangement of testing circuit, whether power transmission and transformation circuit and earthing device form is detected the loop, thereby judge whether earthing device is removed, solved in the prior art after power transmission and transforming equipment is finished maintenance, the switching on earth wire that has omission in the dismounting earthing device process and cause is to cause the problem of security incident, realized after power transmission and transforming equipment is finished maintenance, remove the technique effect of earthing device fully, thereby realize that safety is sent electricity after the power transmission and transforming equipment maintenance is finished.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. a power transmission and transforming equipment testing circuit is characterized in that, comprising:
Power supply, an end ground connection is used for providing electric energy;
Part flow arrangement, first end connects by the power transmission and transformation circuit of current indicator and power transmission and transforming equipment earth terminal, and the other end of the second end and described power supply connects;
Described current indicator, first end is connected with the first end of described part flow arrangement, and the second end and described power transmission and transformation circuit connect, for detection of the electric current of described part flow arrangement, when the electric current of described part flow arrangement was zero, described power transmission and transforming equipment was in a safe condition.
2. testing circuit according to claim 1 is characterized in that, described testing circuit also comprises:
Single-pole switch, first end is connected with the second end of described current indicator, and the second end is connected with described power transmission and transformation circuit.
3. testing circuit according to claim 2 is characterized in that, described power supply is direct supply.
4. testing circuit according to claim 3 is characterized in that, described direct supply is the direct supply that is less than or equal to 36V.
5. testing circuit according to claim 4 is characterized in that, described part flow arrangement comprises shunt resistance.
6. testing circuit according to claim 5 is characterized in that, described current indicator comprises multimeter.
7. testing circuit according to claim 5 is characterized in that, described current indicator comprises the integrated current indicator.
8. a power transmission and transforming equipment detection system is characterized in that, described system comprises:
Each described testing circuit in the claim 1 to 7;
Power transmission and transforming equipment, power transmission and transformation circuit and the described testing circuit of earth terminal connect; And
Earthing device is connected in parallel with described testing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220415143.5U CN202693726U (en) | 2012-08-20 | 2012-08-20 | Detection circuit and detection system for electric transmission and transformation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220415143.5U CN202693726U (en) | 2012-08-20 | 2012-08-20 | Detection circuit and detection system for electric transmission and transformation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202693726U true CN202693726U (en) | 2013-01-23 |
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ID=47549327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220415143.5U Expired - Lifetime CN202693726U (en) | 2012-08-20 | 2012-08-20 | Detection circuit and detection system for electric transmission and transformation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202693726U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123031A (en) * | 2019-12-18 | 2020-05-08 | 国网湖北省电力有限公司宜昌供电公司 | Fault detection method, low-voltage energy storage pre-operation set device, controller and system |
| CN113985198A (en) * | 2021-10-19 | 2022-01-28 | 国网安徽省电力有限公司电力科学研究院 | Automatic detection device for secondary protection of power transmission and transformation facilities |
-
2012
- 2012-08-20 CN CN201220415143.5U patent/CN202693726U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111123031A (en) * | 2019-12-18 | 2020-05-08 | 国网湖北省电力有限公司宜昌供电公司 | Fault detection method, low-voltage energy storage pre-operation set device, controller and system |
| CN113985198A (en) * | 2021-10-19 | 2022-01-28 | 国网安徽省电力有限公司电力科学研究院 | Automatic detection device for secondary protection of power transmission and transformation facilities |
| CN113985198B (en) * | 2021-10-19 | 2023-12-15 | 国网安徽省电力有限公司电力科学研究院 | Automatic detection device for secondary protection of power transmission and transformation facility |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |
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| CX01 | Expiry of patent term |