CN208672740U - A kind of distribution ground fault fast transfer line selection apparatus - Google Patents
A kind of distribution ground fault fast transfer line selection apparatus Download PDFInfo
- Publication number
- CN208672740U CN208672740U CN201820859412.4U CN201820859412U CN208672740U CN 208672740 U CN208672740 U CN 208672740U CN 201820859412 U CN201820859412 U CN 201820859412U CN 208672740 U CN208672740 U CN 208672740U
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- resistance
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- diode
- operational amplifier
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
Abstract
The utility model discloses a kind of distribution ground fault fast transfer line selection apparatus, including device noumenon and the current detection module being connected in device noumenon, electric current electrical measurement module includes resistance R1, one end of the resistance R1 is connected with one end of capacitor C1, the other end of capacitor C1 is connected with the cathode of diode D1 and one end of resistance R2, the other end of the resistance R2 is connected with one end of capacitor C2 and one end of resistance R3, the anode of capacitor C2 and diode is grounded, the other end of the resistance R3 is connected with one end of capacitor C3, the other end of capacitor C3 is connected with the second pin of operational amplifier U, the 8th pin of the operational amplifier U is connected with one end of resistance R5, the third pin of operational amplifier U is connected with one end of resistance R4, the other end and operation amplifier of resistance R4 The first pin of device U.The utility model meets the use demand of people convenient for detecting to current signal.
Description
Technical field
The utility model relates to line selection apparatus technical fields more particularly to a kind of distribution ground fault fast transfer route selection to fill
It sets.
Background technique
Neutral by arc extinction coil grounding is the mode being widely used in current low and medium voltage distribution network, this earthing mode tool
Have the advantages that power supply reliability is high.Neutral by arc extinction coil grounding system is also referred to as resonant earthed system, occurs in the system
Most failures are singlephase earth faults.Short-circuit loop, only system are not formed in system when singlephase earth fault occurs
The zero-sequence current of very little caused by distribution capacity, three voltages between phases are still symmetrical, do not influence system worked well, China's electric power rule
Journey regulation, system can continue to run 1-2 hours with singlephase earth fault.But single-phase earthing event occurs for resonant earthed system
When barrier, non-faulting phase-to-ground voltage is increased, and is threatened to insulation, longtime running can accelerate insulation ag(e)ing, and in failure height
Pressure, which acts on lower system, to be punctured again in route other positions, form multipoint earthing, cause short-circuit current paths, cause to supply
Electricity interrupts.In addition, when in case of intermittent arc grounding, the insulation damages that high arc temperature will lead to conducting wire and its close on, hair
Transform into phase fault.Therefore, occur that faulty line must be found as early as possible when ground fault, debug as early as possible, through retrieving,
The patent document of application number 201220251347.X discloses a kind of power grid ground fault line selection device, signal input interface and
Output interface is located at the back side of device；PORT COM is in side；Display screen and operation panel are located at front；Dress is pressed on operation panel
Button, signal lamp and power switch；Mainboard is fixed on bottom, on fill several slots；Collection plate is inserted into the slot on mainboard, acquisition
Plate is L type structure；Place power module in mainboard end；Mounting plate and mounting hole is arranged in device front two sides.The utility model benefit
With the voltage and current signals on route, instantaneous power is calculated, when single-phase earthing occurs for system, is analyzed by global alignment
The variable quantity of instantaneous energy selects faulty line on each route, and shows fault message, issues alarm signal and tripping letter
Number, have many advantages, such as Intelligent fault line-selection, multifunction, compact-sized, easy to operate, practical, this device utilizes route
On voltage and current signals, calculate instantaneous power, but be not easy to detect the power of current signal, be not easy to full
The use demand of sufficient people, therefore we have proposed a kind of distribution ground fault fast transfer line selection apparatus, it is above-mentioned for solving
Problem.
Utility model content
Purpose of the utility model is to solve disadvantages existing in the prior art, and a kind of distribution proposed is grounded event
Hinder fast transfer line selection apparatus.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of distribution ground fault fast transfer line selection apparatus, including device noumenon and the electric current being connected in device noumenon
Detection module, current detection module include resistance R1, and one end of the resistance R1 is connected with one end of capacitor C1, capacitor C1's
The other end is connected with the cathode of diode D1 and one end of resistance R2, and the other end of the resistance R2 is connected with one end of capacitor C2
With one end of resistance R3, the anode of capacitor C2 and diode is grounded, and the other end of the resistance R3 is connected with the one of capacitor C3
End, the other end of capacitor C3 are connected with the second pin of operational amplifier U, and the 8th pin of the operational amplifier U is connected with
One end of resistance R5, the third pin of operational amplifier U are connected with one end of resistance R4, the other end and operation amplifier of resistance R4
The first pin of device U, the first pin of the operational amplifier U is connected with one end of capacitor C4 and one end of resistance R6, described
The other end of capacitor C4 is connected with one end of resistance R7 and the base stage of triode Q1, the other end and triode Q1 of the resistance R7
Emitter connection, the collector of the triode Q1 is connected with the anode of diode D3, the other end connection of the resistance R6
There is the anode of diode D2, the cathode of diode D2, D3 are grounded.
Preferably, the model LM358 of the operational amplifier U, and the 4th pin ground connection of operational amplifier U.
Preferably, the other end of the resistance R5 is connected with power supply, supply voltage 5V.
Preferably, the model 1N5391 of the diode D1.
Preferably, the model MPS651 of the triode Q1.
Preferably, the model of the capacitor C1 and capacitor C2 is 0603.
Compared with prior art, the utility model has the beneficial effects that by by resistance R1, capacitor C1, diode D1, resistance
R2, capacitor C2, resistance R3, capacitor C3, operational amplifier U, resistance R4, resistance R5, resistance R6, capacitor C4, diode D2, two poles
The electric current electrical measurement circuit of pipe D3, resistance R7 and triode Q1 composition, convenient for detecting to electric current, the utility model is convenient for electricity
Stream signal is detected, and the use demand of people is met.
Detailed description of the invention
Fig. 1 be the utility model proposes a kind of distribution ground fault fast transfer line selection apparatus circuit diagram；
Fig. 2 be the utility model proposes a kind of distribution ground fault fast transfer line selection apparatus device noumenon and electric current
Detection module connection schematic diagram.
In figure: 1 device noumenon, 2 current detection modules.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.
Referring to Fig.1-2, a kind of distribution ground fault fast transfer line selection apparatus, including device noumenon 1 and it is connected to device
Current detection module 2 on ontology 1, current detection module 2 include resistance R1, and one end of resistance R1 is connected with the one of capacitor C1
End, the other end of capacitor C1 are connected with the cathode of diode D1 and one end of resistance R2, and the other end of resistance R2 is connected with capacitor
The anode of one end of C2 and one end of resistance R3, capacitor C2 and diode is grounded, and the other end of resistance R3 is connected with capacitor C3
One end, the other end of capacitor C3 is connected with the second pin of operational amplifier U, and the 8th pin of operational amplifier U is connected with
One end of resistance R5, the third pin of operational amplifier U are connected with one end of resistance R4, the other end and operation amplifier of resistance R4
The first pin of device U, the first pin of operational amplifier U are connected with one end of capacitor C4 and one end of resistance R6, capacitor C4's
The other end is connected with one end of resistance R7 and the base stage of triode Q1, and the other end of resistance R7 and the emitter of triode Q1 connect
It connecing, the collector of triode Q1 is connected with the anode of diode D3, and the other end of resistance R6 is connected with the anode of diode D2, and two
The cathode of pole pipe D2, D3 is grounded, by by resistance R1, capacitor C1, diode D1, resistance R2, capacitor C2, resistance R3, capacitor
C3, operational amplifier U, resistance R4, resistance R5, resistance R6, capacitor C4, diode D2, diode D3, resistance R7 and triode
The electric current electrical measurement circuit of Q1 composition, convenient for detecting to electric current, the utility model meets convenient for detecting to current signal
The use demand of people.
In the utility model, the model LM358 of operational amplifier U, and the 4th pin ground connection of operational amplifier U, electricity
The other end of resistance R5 is connected with power supply, the model 1N5391 of supply voltage 5V, diode D1, the model of triode Q1
The model of MPS651, capacitor C1 and capacitor C2 are 0603, by by resistance R1, capacitor C1, diode D1, resistance R2, capacitor
C2, resistance R3, capacitor C3, operational amplifier U, resistance R4, resistance R5, resistance R6, capacitor C4, diode D2, diode D3, electricity
The electric current electrical measurement circuit of R7 and triode Q1 composition is hindered, convenient for detecting to electric current, the utility model is convenient for current signal
It is detected, meets the use demand of people.
Working principle: in use, when having electric current to enter in circuit, diode D1 is lighted, and electric current passes through operational amplifier
Operation amplifier is carried out to current signal, when the electric current in circuit is larger, diode D2 is lighted, when electric current is normal, diode
D3 is lighted, so as to quickly detect the power of electric current in circuit.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (6)
1. a kind of distribution ground fault fast transfer line selection apparatus including device noumenon (1) and is connected on device noumenon (1)
Current detection module (2), current detection module (2) include resistance R1, which is characterized in that one end of the resistance R1 is connected with electricity
Hold one end of C1, the other end of capacitor C1 is connected with the cathode of diode D1 and one end of resistance R2, and the resistance R2's is another
End is connected with one end of capacitor C2 and one end of resistance R3, and capacitor C2 and the positive of diode are grounded, and the resistance R3's is another
One end is connected with one end of capacitor C3, and the other end of capacitor C3 is connected with the second pin of operational amplifier U, the operation amplifier
The 8th pin of device U is connected with one end of resistance R5, and the third pin of operational amplifier U is connected with one end of resistance R4, resistance
The other end of R4 and the first pin of operational amplifier U, the first pin of the operational amplifier U are connected with one end of capacitor C4
With one end of resistance R6, the other end of the capacitor C4 is connected with one end of resistance R7 and the base stage of triode Q1, the resistance
The other end of R7 is connect with the emitter of triode Q1, and the collector of the triode Q1 is connected with the anode of diode D3, institute
The other end for stating resistance R6 is connected with the anode of diode D2, and the cathode of diode D2, D3 are grounded.
2. a kind of distribution ground fault fast transfer line selection apparatus according to claim 1, which is characterized in that the operation
The model LM358 of amplifier U, and the 4th pin ground connection of operational amplifier U.
3. a kind of distribution ground fault fast transfer line selection apparatus according to claim 1, which is characterized in that the resistance
The other end of R5 is connected with power supply, supply voltage 5V.
4. a kind of distribution ground fault fast transfer line selection apparatus according to claim 1, which is characterized in that two pole
The model 1N5391 of pipe D1.
5. a kind of distribution ground fault fast transfer line selection apparatus according to claim 1, which is characterized in that three pole
The model MPS651 of pipe Q1.
6. a kind of distribution ground fault fast transfer line selection apparatus according to claim 1, which is characterized in that the capacitor
The model of C1 and capacitor C2 are 0603.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820859412.4U CN208672740U (en) | 2018-06-05 | 2018-06-05 | A kind of distribution ground fault fast transfer line selection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820859412.4U CN208672740U (en) | 2018-06-05 | 2018-06-05 | A kind of distribution ground fault fast transfer line selection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208672740U true CN208672740U (en) | 2019-03-29 |
Family
ID=65824926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820859412.4U Expired - Fee Related CN208672740U (en) | 2018-06-05 | 2018-06-05 | A kind of distribution ground fault fast transfer line selection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208672740U (en) |
-
2018
- 2018-06-05 CN CN201820859412.4U patent/CN208672740U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190329 Termination date: 20200605 |
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| CF01 | Termination of patent right due to non-payment of annual fee |