CN202083766U - High voltage grounding line selection apparatus - Google Patents

High voltage grounding line selection apparatus Download PDF

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Publication number
CN202083766U
CN202083766U CN2011200758478U CN201120075847U CN202083766U CN 202083766 U CN202083766 U CN 202083766U CN 2011200758478 U CN2011200758478 U CN 2011200758478U CN 201120075847 U CN201120075847 U CN 201120075847U CN 202083766 U CN202083766 U CN 202083766U
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China
Prior art keywords
circuit
resistance
voltage
output terminal
diode
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Expired - Lifetime
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CN2011200758478U
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Chinese (zh)
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王怀新
邓会恩
彭立华
李玉泉
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BEIJING HUADONG ELECTRIC Co Ltd
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BEIJING HUADONG ELECTRIC Co Ltd
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Abstract

Provided is a high voltage grounding line selection apparatus, which is characterized by comprising a tetra and gate IC4-1. The tetra and gate IC4-1 comprises four input ends and one output end, with the four input points of the four input ends being I0, THI, Pm, and U0 respectively, wherein the input point I0 is connected with the circuit having an output end I0; the input point THI is connected with a circuit having an output end THI; the input point Pm is connected with a circuit having an output end Pm; and the input point U0 is connected with a circuit having an output end U0. The high voltage grounding line selection apparatus also comprises a measurement display module. The output end is respectively connected with an alarm circuit and a grounding memory indication circuit; the grounding memory indication circuit is connected with an inspection tour circuit; the inspection tour circuit is respectively connected with the alarm circuit and the measurement display module; and the circuit having the output end U0 is connected with the measurement display module. The high voltage grounding line selection apparatus features more accurate detection by having complementary advantages of multi-line selection criteria.

Description

The high-voltage earthing line selection apparatus
Technical field
The utility model relates to a kind of a kind of device of measuring electric variable that is used for electrical network, says that more specifically the utility model is a kind of high-voltage earthing line selection apparatus, and in International Patent Classification (IPC), the utility model should be divided into the G01R group.
Background technology
At present, existing relevant method of testing, the situation that measuring error is bigger than normal even make a fault often appears, particularly in colliery system, cable line is different in size, the operational factor frequent variations, aging circuit, insulation reduces and when causing corona occurring, the situation of non-ground wire electric current greater than the ground wire electric current can occur, causes misjudgment to occur.In addition, the debugging of prior art complete machine is often also quite difficult.
The utility model content
The purpose of this utility model is: at the defective of prior art, provide a kind of isolated neutral that both had been applicable to also to be applicable to through grounding through arc, adopt the detection high-voltage earthing line selection apparatus more accurately of the mutual supplement with each other's advantages of multiple route selection criterion.
The purpose of this utility model is achieved through the following technical solutions:
Described high-voltage earthing line selection apparatus comprises one four and a door IC 4-1, described four with the door IC 4-1With four input ends and an output terminal.
Described four input ends are respectively: I 0, THI, P m, U 0Four input points, described I 0It is I that input point connects output terminal 0The circuit of point, it is the circuit that THI is ordered that described THI input point connects output terminal, described P mIt is P that input point connects output terminal mThe circuit of point, described U 0It is U that input point connects output terminal 0The circuit of point.
Described high-voltage earthing line selection apparatus has one to measure display module.
Described output terminal connects warning circuit and ground connection memory indicating circuit respectively.
Described ground connection memory indicating circuit connects routing inspection circuit.
Described routing inspection circuit connects warning circuit respectively and measures display module.
Described output terminal is U 0The circuit of point connects described measurement display module.
Described output terminal is I 0It is the circuit that THI is ordered that the circuit of point connects output terminal, and described output terminal is that the circuit connection output terminal that THI is ordered is P mThe circuit of point, described output terminal is P mThe circuit of point connects measures display module.
Because the utility model has adopted above-mentioned technical scheme, as each output point I 0, U 0, THI and P mWhen four output points all reach noble potential " 1 ", four with the door IC 4-1The output noble potential, thus controllable silicon triggered, created key condition for realizing the purpose of this utility model, guaranteed the detection advantage more accurately of the mutual supplement with each other's advantages of multiselect line criterion.
Description of drawings
Below in conjunction with accompanying drawing the utility model is explained the main points briefly, wherein:
Accompanying drawing 1 is the utility model circuit block diagram.
Accompanying drawing 2 is the physical circuit schematic diagram of an embodiment of the utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.Wherein, accompanying drawing 1 is the utility model circuit block diagram.Can see from this accompanying drawing: the utility model comprises one four and a door IC 4- 1, described four with the door IC 4-1With four input ends and an output terminal.Described four input ends are respectively: I 0, THI, P m, U 0Four input points, described I 0It is I that input point connects output terminal 0The circuit of point, it is the circuit that THI is ordered that described TH input point connects output terminal, described P mIt is P that input point connects output terminal mThe circuit of point, described U 0It is U that input point connects output terminal 0The circuit of point.Described high-voltage earthing line selection apparatus has one to measure display module.Described output terminal connects warning circuit and ground connection memory indicating circuit respectively.Described ground connection memory indicating circuit connects routing inspection circuit.Described routing inspection circuit connects warning circuit respectively and measures display module.Described output terminal is U 0The circuit of point connects described measurement display module.Described output terminal is I 0It is the circuit that THI is ordered that the circuit of point connects output terminal, and described output terminal is that the circuit connection output terminal that THI is ordered is P mThe circuit of point, described output terminal is P mThe circuit of point connects measures display module.
Accompanying drawing 2 is the physical circuit schematic diagram of an embodiment of the utility model.This also is the physical circuit schematic diagram of a most preferred embodiment of the present utility model.Can see from this figure: described output terminal is I 0The circuit of point comprises zero sequence current mutual inductor CT 1, current transformer CT 2, first resistance R 1, second resistance R 2, triode BG, not gate IC 1-1, the first diode D 1With the 3rd resistance R 3By described current transformer CT 2The first secondary coil L 1Output, connect first resistance R successively 1, triode BG, second resistance R 2, not gate IC 1-1, the first diode D 1(also can replace, both can indicate I with light emitting diode 0, again can with the 3rd resistance R as divider resistance 3Form shaping circuit) and the 3rd resistance R 3Forming an output point is I 0The circuit of point.Can see simultaneously: described output terminal is that the circuit that THI is ordered comprises by zero sequence current mutual inductor CT 1, current transformer CT 2, potentiometer W 1, the 4th resistance R 4, first capacitor C 1, reactor L 3, the 5th resistance R 5, the 6th resistance R 6, the first amplifier IC 2-1, the second amplifier IC 2-2, the second diode D 2, the 5 subharmonic current measurement and control unit circuit that constitute of the 7th resistance R 7; Wherein: by described current transformer CT 2The first secondary coil L 1Output, connect potentiometer W successively 1, the 4th resistance R 4, first capacitor C 1, reactor L 3, the 5th resistance R 5, the 6th resistance R 6, the first amplifier IC 2-1, the second amplifier IC 2-2, the second diode D 2, the 7th resistance R 7Constituting output terminal is the 5 subharmonic current measurement and control unit circuit that THI is ordered.Described output terminal is P mThe circuit of point comprises that corona leaks little electric current and inspects unit and the big current trigger condition circuit of zero sequence, and the two is in series, and its output point is P mMore specifically say: described corona leaks little electric current to be inspected the unit and comprises zero sequence current mutual inductor CT 1, current transformer CT 2, the 8th resistance R 8, the 9th resistance R 9, the 3rd amplifier IC 3-1, the 12 resistance R 12With the 5th light emitting diode D 5By described current transformer CT 2The second secondary coil L 2Output connects the 3rd amplifier IC successively 3-1, the 8th resistance R 8, the 9th resistance R 9, the 12 resistance R 12With the 5th light emitting diode D 5The big current trigger condition circuit of described zero sequence comprises the first diac D 4, preset diode D 3, the first adjustable resistance R 10, the first divider resistance R 11, four high guaily unit IC 3-2, the 8th diode D 8With the 13 resistance R 13Above-mentioned device connects successively and forms P at output terminal mOutput point; Equally, described output terminal is P mThe circuit of point also comprises a series circuit of being made up of trigger voltage monitoring circuit and the high residual voltage trigger circuit of residual voltage≤10V; Wherein: the trigger voltage monitoring circuit of described residual voltage≤10V comprises voltage transformer pt, the second divider resistance R 31, the 3rd divider resistance R 32, commutation diode D 12With the second voltage stabilizing diode DW -2, trigger adjustable resistance R 16, the first preset resistance R 14, the second preset resistance R 15, the 5th amplifier IC3-3, the 7th light emitting diode D 7, the 19 resistance R 19The output of the open delta voltage U Δ of voltage transformer pt is through the second divider resistance R 31, the 3rd divider resistance R 32, commutation diode D 12With the second voltage stabilizing diode DW -2, trigger adjustable resistance R 16, the first preset resistance R 14, the second preset resistance R 15, the 5th amplifier IC3-3 and the 7th light emitting diode D 7The trigger voltage monitoring circuit of forming residual voltage≤10V.In addition: described high residual voltage trigger circuit comprise diac D 6, the 17 resistance R 17, the second adjustable resistance R 18, the 6th amplifier IC3-4, the 9th diode D 9With the 13 resistance R 13Above-mentioned device connects successively and forms P endways mOutput point.Can see at accompanying drawing 2: described output terminal is U 0The circuit of point comprises by voltage transformer pt, the second divider resistance R 31, the 3rd divider resistance R 32, commutation diode D 12With the second voltage stabilizing diode DW -2The residual voltage output condition circuit of forming; Wherein: the output of the open delta voltage U Δ of voltage transformer pt, through the second divider resistance R 31, the 3rd divider resistance R 32, commutation diode D 12With the second voltage stabilizing diode DW -2, form U at output terminal 0Output point.Can see in this accompanying drawing: described warning circuit comprises the 13 diode D 13, delay capacitor C 2, the 21 resistance R 21, the 3rd capacitor C 3, the second time base circuit IC 7, anti-shake capacitor C 7, relay J 1, first LED 1, the 23 resistance R 23, alarm BG; Described the 13 diode D 13Positive pole connect described four with the door IC 4-1Output terminal, described the 13 diode D 13, delay capacitor C 2, the 21 resistance R 21, the 3rd capacitor C 3, the second time base circuit IC 7, anti-shake capacitor C 7, relay J 1, first LED 1, the 23 resistance R 23, the alarm BG composition warning circuit that is connected successively.Also can see in accompanying drawing 2 in addition: described routing inspection circuit comprises oscillatory circuit, counter-decoder circuit and on-off circuit; Described oscillatory circuit, counter-decoder circuit and on-off circuit are in series successively; Wherein: described oscillatory circuit comprises the first time base circuit IC 5, the 4th capacitor C 4, the 5th capacitor C 5, the 3rd adjustable resistance W 2, the 22 resistance R 22With switch K 3, above-mentioned device is connected successively; Described counter-decoder circuit comprises the 6th integrated circuit (IC) 6, the 25 resistance R 25, the 26 resistance R 26With the zero suppression capacitor C 6, above-mentioned device is connected successively; Described on-off circuit comprises the 27 resistance R 27, the 28 resistance R 28, the 29 resistance R 29, the 30 resistance R 30With bidirectional analog switch I C 8-1, above-mentioned device is connected in proper order.In addition, can see in accompanying drawing 2: the utility model comprises a ground connection memory indicating circuit, and it comprises the 3rd LED 3, the 20 resistance R 20, controllable silicon TK -1, the first voltage stabilizing diode DW -1, above-mentioned device is in series successively; Described controllable silicon TK -1The control utmost point connect described four with the door IC 4-1Output terminal.At last, can also see that described measurement display module whereby can remote monitoring with communication interface.
Narrate principle of work of the present utility model below: for the mensuration of residual voltage, when the open delta voltage U of voltage transformer pt Δ reaches setting valve, commutation diode D 12Conducting, make four with the door IC 4-1Input end U 0The set current potential; As first via ground connection, zero sequence current mutual inductor CT 1The secondary induction electromotive force through current transformer CT 2Secondary side L 1The output induction electromotive force makes triode BG conducting, makes not gate IC 1-1Input end becomes " 0 " current potential, so not gate IC 1-1Output terminal becomes " 1 " current potential; About the observing and controlling of 5 subharmonic,, survey 5 subharmonic maximums during electric leakage, current transformer CT for the main-transformer that is connected to arc suppression coil 2Secondary side L 1The induced voltage of output is through potentiometer W 1Adjust, through C 1, L 3Form 5 subharmonic wave filters, L 3Both end voltage is during greater than preset voltage, the first amplifier IC 2-1Output " 1 " current potential, the second amplifier IC 2-2(as follower) output " 1 " current potential makes THI end set current potential; It should be noted that: in order not influence measuring accuracy, to current transformer CT 2Carry out special manufacturing: L 1And L 2Two ends of the same name link together, two other end of the same name is separately positioned on both sides, though L 2The induction electromotive force of output has also inserted the 3rd amplifier IC 3-1In-phase input end, but input impedance is very big, does not influence measuring accuracy substantially; Leakage current is through L 2Output is added to the 3rd IC 3-1In-phase input end because the 3rd IC 3-1The preset voltage of inverting input be R 8/ R 9=1000/1, so enlargement factor is very big, even very little leakage current, even the corona at cable end place also can make IC 3-1The output high voltage makes and sends out the 5th optical diode D 5Luminous, there is the situation of electric leakage on this road of prompting operator on duty, if leakage current further increases, and the 3rd amplifier IC 3-1Input voltage further improve, by the first diac D 4Trigger four high guaily unit IC 3-2In-phase input end, and four high guaily unit IC 3-2The preset voltage of inverting input do not fix, but be decided by the second amplifier IC 2-2The height and the first adjustable resistance R of output voltage 10Size, set four high guaily unit IC 3-2Preset voltage, up to four high guaily unit IC 3-2In-phase input end during greater than the current potential of inverting input, four high guaily unit IC 3-2Output " 1 " current potential.As four with the door IC 4-1The potential condition of the 4th " 1 ", four with a door IC 4-1Output " 1 " current potential triggers controllable silicon TK -1, controllable silicon TK -1Conducting, the 3rd LED 3Luminous, report to the police as the electric leakage light of this circuit; About residual voltage U 0The trigger voltage of (also being U Δ open delta voltage) and the observing and controlling of alarm voltage, the height of residual voltage does not reflect the weight situation of line-to-ground merely, also with the fluctuation of the harmonic current of system, factors such as the phase shortage of high pressure are relevant, it is very little leakage current to occur at circuit, residual voltage may be lower than below the 10V, so be not easy to find that the insulation ag(e)ing because of circuit may move accident progress condition of enlarged by long-time big electric current; In order to find accident potential's circuit in advance, indication of leakage residual voltage and residual voltage exceed standard to report to the police and are achieved in that the residual voltage of electric leakage is through commutation diode D 12Rectification is through triggering adjustable resistance R 16Trigger the 5th amplifier IC 3-3In-phase input end, and the 5th amplifier IC 3-3The preset voltage of inverting input be by the first preset resistance R 14With the second preset resistance R 15Dividing potential drop obtain R 14/ R 15=1/1, supply voltage V+ is 12V, so the 5th amplifier IC 3-3Preset voltage be 1/2V+=6V, if this moment U 0During＞6V, the 5th amplifier IC 3-3The output noble potential makes the 7th light emitting diode D 7Send and leak indication; If U 0Further increase the 5th amplifier IC 3-3" 1 " current potential of output is through the second diac D 6Trigger the 6th amplifier IC 3-4In-phase input end, and the 6th amplifier IC 3-4Anti-phase input preset voltage is unfixed, but by the second adjustable resistance R 18, the 17 resistance R 17Dividing potential drop and setting is if the 5th amplifier IC 3-3The noble potential of output is greater than the 6th amplifier IC 3-4During the inverting input preset voltage, the 6th amplifier IC 3-4The output noble potential is through the 9th diode D 9(the also available light emitting diode and the U that holds concurrently 0Indication exceeds standard) make four with the door P mSet current potential (the 9th diode D 9, the 8th diode D 8, the tenth diode D 10Form OR circuit), then four with a door IC 4-1Four input end: I 0, U 0, THI, P mBe " 1 " current potential, thus four with the door IC 4-1Output " 1 " current potential drives controllable silicon TK -1Conducting is sent the electric leakage on this road and is indicated.About warning circuit, controllable silicon TK -1Conducting makes the 3rd LED 3Send the light indication, a while four and a door IC 4-1" 1 " current potential of output is through the 13 diode D 13(isolating diode) triggers warning circuit, the second time base circuit IC 7Output " 0 " current potential, relay J 1Action, its normally opened contact J 1-3Closure is sent acoustic alarm, and ground connection is removed the alert signal lag of back sound and stopped, and the 3rd LED 3The light indication of sending (must manually stop master switch K as permanent light memory 1Reset).About routing inspection circuit and measurement display module, in high pressure electric leakage sound and light alarm, relay J 1Another group normally opened contact J 1-1The closed routing inspection circuit of connecting.With oscillator IC 5(first time base circuit), counter-decoder circuit (the 6th integrated circuit) IC 6, bidirectional analog switch I C 8-1Be that main routing inspection circuit is started working, as when patrolling and examining A channel, bidirectional analog switch I C 8-1L 1-nConducting provides the zero-sequence current condition of measuring display module (PH), it and U 0Product calculate the real component that electric leakage produces through this module, also can on display screen, demonstrate the active power real data.The electric leakage parameter that also can show other necessity.When making regular check on each circuit dielectric level at ordinary times, can close a floodgate K2, connect routing inspection circuit artificially, measure the power data that display module (PH) calculates and also be converted into voltage conditions through the tenth diode D this moment 10As P mSubsidiary conditions (the D of point 8, D 9, D 10Form or door).Certain K 2When closed for a long time, D 10Output can be used as an electric leakage power trigger four and a door IC 4-1Essential condition.
In certain embodiments, IC 2-1, IC 2-2Can select 1/2LM324, IC 3-1, IC 3-2, IC 3-3, IC 3-4Be LM324, IC 4-1Be two 4 inputs and door CD4082, time base circuit IC 5, IC 7Be NE555, counter-decoder circuit IC 6Be CD4017, analog switch IC 8-1Be CD4066; As for measuring display module, ready-made ZW6433C circuit is arranged also; Certainly, also can select the performance similar products like as required, repeat no more herein.
Measure display module and also have a communication interface, can carry out remote monitoring by microcomputer at a distance.

Claims (10)

1. high-voltage earthing line selection apparatus is characterized in that:
Described high-voltage earthing line selection apparatus comprises one four and a door IC 4-1, described four with the door IC 4-1With four input ends and an output terminal;
Described four input ends are respectively: I 0, THI, P m, U 0Four input points, described I 0It is I that input point connects output terminal 0The circuit of point, it is the circuit that THI is ordered that described THI input point connects output terminal, described P mIt is P that input point connects output terminal mThe circuit of point, described U 0It is U that input point connects output terminal 0The circuit of point;
Described high-voltage earthing line selection apparatus has one to measure display module;
Described output terminal connects warning circuit and ground connection memory indicating circuit respectively;
Described ground connection memory indicating circuit connects routing inspection circuit;
Described routing inspection circuit connects warning circuit respectively and measures display module;
Described output terminal is U 0The circuit of point connects described measurement display module;
Described output terminal is I 0It is the circuit that THI is ordered that the circuit of point connects output terminal, and described output terminal is that the circuit connection output terminal that THI is ordered is P mThe circuit of point, described output terminal is P mThe circuit of point connects measures display module.
2. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described output terminal is I 0The circuit of point comprises zero sequence current mutual inductor CT 1, current transformer CT2, first resistance R 1, second resistance R 2, triode BG, not gate IC 1-1, the first diode D 1With the 3rd resistance R 3
By described current transformer CT 2The first secondary coil L 1Output, connect first resistance R successively 1, triode BG, second resistance R 2, not gate IC 1-1, the first diode D 1With the 3rd resistance R 3Forming an output point is I 0The circuit of point.
3. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described output terminal is that the circuit that THI is ordered comprises by zero sequence current mutual inductor CT 1, current transformer CT 2, potentiometer W 1, the 4th resistance R 4, first capacitor C 1, reactor L 3, the 5th resistance R 5, the 6th resistance R 6, the first amplifier IC 2-1, the second amplifier IC 2-2, the second diode D 2, the 7th resistance R 7The 5 subharmonic current measurement and control unit circuit that constitute;
Wherein: by described current transformer CT 2The first secondary coil L 1Output, connect potentiometer W successively 1, the 4th resistance R 4, first capacitor C 1, reactor L 3, the 5th resistance R 5, the 6th resistance R 6, the first amplifier IC 2-1, the second amplifier IC 2-2, the second diode D 2, to constitute output terminals be the 5 subharmonic current measurement and control unit circuit that THI is ordered to the 7th resistance R 7.
4. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described output terminal is P mThe circuit of point comprises that corona leaks little electric current and inspects unit and the big current trigger condition circuit of zero sequence, and the two is in series, and its output point is P m
Described corona leaks little electric current to be inspected the unit and comprises zero sequence current mutual inductor CT 1, current transformer CT 2, the 8th resistance R 8, the 9th resistance R 9, the 3rd amplifier IC 3-1, the 12 resistance R 12With the 5th light emitting diode D 5
By described current transformer CT 2The second secondary coil L 2Output connects the 3rd amplifier IC successively 3-1, the 8th resistance R 8, the 9th resistance R 9, the 12 resistance R 12With the 5th light emitting diode D 5
The big current trigger condition circuit of described zero sequence comprises the first diac D 4, preset diode D 3, the first adjustable resistance R 10, the first divider resistance R 11, four high guaily unit IC 3-2, the 8th diode D 8With the 13 resistance R 13
Above-mentioned device connects successively and forms P at output terminal mOutput point.
5. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described output terminal is P mThe circuit of point comprises trigger voltage monitoring circuit and the high residual voltage trigger circuit of residual voltage≤10V;
The trigger voltage monitoring circuit of described residual voltage≤10V comprises voltage transformer pt, the second divider resistance R 31, the 3rd divider resistance R 32, commutation diode D 12With the second voltage stabilizing diode DW -2, trigger adjustable resistance R 16, the first preset resistance R 14, the second preset resistance R 15, the 5th amplifier IC3-3, the 7th light emitting diode D 7, the 19 resistance R 19
The output of the open delta voltage U Δ of voltage transformer pt is through the second divider resistance R 31, the 3rd divider resistance R 32, commutation diode D 12With the second voltage stabilizing diode DW -2, trigger adjustable resistance R 16, the first preset resistance R 14, the second preset resistance R 15, the 5th amplifier IC3-3 and the 7th light emitting diode D 7, the 19 resistance R 19The trigger voltage monitoring circuit of forming residual voltage≤10V;
Described high residual voltage trigger circuit comprise the second diac D 6, the 17 resistance R 17, the second adjustable resistance R 18, the 6th amplifier IC3-4, the 9th diode D 9With the 13 resistance R 13Above-mentioned device connects successively and forms P endways mOutput point.
6. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described output terminal is U 0The circuit of point comprises by voltage transformer pt, the second divider resistance R 31, the 3rd divider resistance R 32, commutation diode D 12With the second voltage stabilizing diode DW -2The residual voltage output condition circuit of forming;
The output of the open delta voltage U Δ of voltage transformer pt is through the second divider resistance R 31, the 3rd divider resistance R 32, commutation diode D 12With the second voltage stabilizing diode DW -2, form U at output terminal 0Output point.
7. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described warning circuit comprises the 13 diode D 13, delay capacitor C 2, the 21 resistance R 21, the 3rd capacitor C 3, the second time base circuit IC 7, anti-shake capacitor C 7, relay J 1, first LED 1, the 23 resistance R 23, alarm BG;
Described the 13 diode D 13Positive pole connect described four with the door IC 4-1Output terminal, described the 13 diode D 13, delay capacitor C 2, the 21 resistance R 21, the 3rd capacitor C 3, the second time base circuit IC 7, anti-shake capacitor C 7, relay J 1, first LED 1, the 23 resistance R 23, alarm BG is connected successively.
8. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described routing inspection circuit comprises oscillatory circuit, counter-decoder circuit and on-off circuit;
Described oscillatory circuit, counter-decoder circuit and on-off circuit are in series successively;
Described oscillatory circuit comprises the first time base circuit IC 5, the 4th capacitor C 4, the 5th capacitor C 5, the 3rd adjustable resistance W 2, the 22 resistance R 22With switch K 3, above-mentioned device is connected successively;
Described counter-decoder circuit comprises the 6th integrated circuit (IC) 6, the 25 resistance R 25, the 26 resistance R 26With the zero suppression capacitor C 6, above-mentioned device is connected successively;
Described on-off circuit comprises the 27 resistance R 27, the 28 resistance R 28, the 29 resistance R 29, the 30 resistance R 30With bidirectional analog switch I C 8-1, above-mentioned device is connected in proper order.
9. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described ground connection memory indicating circuit comprises the 3rd LED 3, the 20 resistance R 20, controllable silicon TK -1, the first voltage stabilizing diode DW -1, above-mentioned device is in series successively;
Described controllable silicon TK -1The control utmost point connect described four with the door IC 4-1Output terminal.
10. high-voltage earthing line selection apparatus according to claim 1 is characterized in that:
Described measurement display module is with communication interface.
CN2011200758478U 2011-03-22 2011-03-22 High voltage grounding line selection apparatus Expired - Lifetime CN202083766U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200758478U CN202083766U (en) 2011-03-22 2011-03-22 High voltage grounding line selection apparatus

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Application Number Priority Date Filing Date Title
CN2011200758478U CN202083766U (en) 2011-03-22 2011-03-22 High voltage grounding line selection apparatus

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CN202083766U true CN202083766U (en) 2011-12-21

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CN2011200758478U Expired - Lifetime CN202083766U (en) 2011-03-22 2011-03-22 High voltage grounding line selection apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102221661A (en) * 2011-03-22 2011-10-19 北京华东电气股份有限公司 High pressure grounding line selection apparatus
CN105548845A (en) * 2016-01-27 2016-05-04 国网山东省电力公司青岛供电公司 Device and method for detection of insulation tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102221661A (en) * 2011-03-22 2011-10-19 北京华东电气股份有限公司 High pressure grounding line selection apparatus
CN105548845A (en) * 2016-01-27 2016-05-04 国网山东省电力公司青岛供电公司 Device and method for detection of insulation tool

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