CN203616381U - Safety inspection and discharge tester - Google Patents
Safety inspection and discharge tester Download PDFInfo
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- CN203616381U CN203616381U CN201320641537.7U CN201320641537U CN203616381U CN 203616381 U CN203616381 U CN 203616381U CN 201320641537 U CN201320641537 U CN 201320641537U CN 203616381 U CN203616381 U CN 203616381U
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Abstract
One embodiment of the utility model discloses a safety inspection and discharge tester, which is used for inspection and discharge of a power system capacitive device. The safety inspection and discharge tester comprises an inspection and discharge body, a ground terminal, and a hook connected with the ground terminal. The inspection and discharge body includes a probe, an insulating housing and an insulating handle connected to the insulating housing. An inner cavity of the insulating housing is provided with a circuit board and a fixed plate, the fixed plate is fixed with the insulating housing, and the circuit board by the fixed plate is fixed with the insulating housing. The circuit board is provided with a ceramic discharge tube, and a voltage dividing circuit, n isolating circuit, a boosted circuit, a comparison circuit and an alarm indicating circuit sequentially connected with the ceramic discharge tube. The probe is connected with one end of the ceramic discharge tube, and the other end of the ceramic discharge tube by a ground wire is connected with the ground terminal. The probe of the safety inspection and discharge tester of the utility model is connected with the circuit board, the circuit board is fixed in the insulating housing, an operation end is completely isolated with a testing terminal, the overall safety inspection and discharge tester is in a safety potential, and the safety of users can be ensured.
Description
Technical field
The utility model relates to electrical equipment field, relates in particular a kind of safe electrical verification and discharge instrument.
Background technology
High-voltage parallel capacitor device is being brought into play and is being improved power factor, raising system stability and energy-saving and cost-reducing effect, widespread use in modern power network in electric system.Because capacitor is an energy storage device, when normal operation, storing a large amount of energy, capacitor device need to carry out routine detect or out of service because of fault after, the energy demand of capacitor stores takes certain means to discharge, if this energy can not effectively discharge, can cause certain electric shock to maintainer.
High-voltage parallel capacitor device generally all disposes discharge device-discharge coil in parallel with capacitor group, and in addition, discharge resistance is generally all contained in inner fuse capacitor inside, the electric charge of capacitor stores can be discharged into a lower level.But the voltage of the capacitor remnants after discharging through discharge device all still likely exceedes the safe voltage of 12V.In addition, high-voltage parallel capacitor device is generally installed electrification display and comes the busbar voltage of display device, the Secondary Winding side of discharge coil is connected with discharge indicating lamp indicates the voltage of residual charge, but whether discharge indicating lamp can not show this voltage and be reduced to below safe voltage 12V, still leave potential safety hazard.Therefore, whether detect capacitor group or single capacitor residual voltage lower than safe voltage, for improving maintenance safety measure, protection maintainer's life security is significant.
At present, can electrical verification the device of electric discharge only have high voltage electroscope, but high voltage electroscope can only be tested alternating current more than 90V, exceed the safe range of human body, under this voltage, if overhaul construction, there is the possibility of electric shock, and existing electroscope is all to make earth point by people, and security is low.
Utility model content
The object of the utility model embodiment is to provide a kind of safe electrical verification and discharge instrument, carries out safe electrical verification and electric discharge for electric system capacitive apparatus.
A kind of safe electrical verification and discharge instrument, for electrical verification and the electric discharge of capacitive capacitor, comprise electrical verification electric discharge body, ground terminal, and the hook being connected with described ground terminal;
Described electrical verification electric discharge body comprises probe, insulation crust and the insulated handle being connected with described insulation crust;
In the inner chamber of described insulation crust, be provided with wiring board and fixed head, fixed head and described insulation crust are fixed, and described wiring board is fixed by described fixed head and described insulation crust;
On described wiring board, be provided with ceramic discharge tube, and the bleeder circuit, buffer circuit, booster circuit, comparator circuit and the warning indicating circuit that are connected successively with described ceramic discharge tube;
Described probe is connected with one end of described ceramic discharge tube, and the other end of described ceramic discharge tube is connected with described ground terminal by ground wire.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, described insulation crust is cylindrical shape;
Top and the bottom of described insulation crust are respectively arranged with through hole, and described probe and described insulated handle are fixed by described through hole and described insulation crust respectively.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, described warning indicating circuit comprises pilot lamp and alarm,
The bottom of described insulation crust is also provided with the aperture of observing described pilot lamp, and observes the transparent window of described ceramic discharge tube.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, described ceramic discharge tube is inserted on described wiring board.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, described bleeder circuit comprises the first resistance and the second resistance;
One end of described the first resistance is connected with the first end of described ceramic discharge tube, and the other end is connected with the first end of described the second resistance, and the first end of described the second resistance is also connected with described buffer circuit;
The second end of described the second resistance is connected with the second end of described ceramic discharge tube.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, described buffer circuit comprises the first operational amplifier;
The in-phase input end of described the first operational amplifier is connected with the first end of described the second resistance, and the output terminal of described the first operational amplifier is connected with inverting input;
Described output terminal is also connected with described booster circuit.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, described booster circuit comprises the second operational amplifier, the 3rd operational amplifier, the 3rd resistance, the 4th resistance, the first divider resistance and the second divider resistance;
The first end of described the first divider resistance with connect positive 5V voltage and be connected, the second end is connected with the first end of described the second divider resistance, the second end ground connection of described the second divider resistance, the first end of described the second divider resistance is connected with the in-phase input end of described the second operational amplifier;
The output terminal of described the second operational amplifier is connected with the inverting input of self, the output terminal of described the second operational amplifier is also connected with the in-phase input end of described the 3rd operational amplifier by described the 3rd resistance, and the in-phase input end of described the 3rd operational amplifier is also connected with the output terminal of described the first operational amplifier by described the 4th resistance;
The inverting input of described the 3rd operational amplifier is connected with the output terminal of self, and the output terminal of described the 3rd operational amplifier is connected with comparator circuit.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, described comparator circuit comprises the first comparer, the second comparer, the first diode, the second diode, the first adjustable resistance, the second adjustable resistance, the first pull-up resistor and the second pull-up resistor;
One end of described the first adjustable resistance is connected with the normal phase input end of described the first comparer, other end ground connection;
The normal phase input end of described the first comparer also connects positive 5V voltage, and the inverting input of described the first comparer is connected with the output terminal of described the 3rd operational amplifier, and the output terminal of described the first comparer connects positive 5V voltage by described the first pull-up resistor;
The normal phase input end of described the second comparer is connected with the output terminal of described the 3rd operational amplifier, the inverting input of the second comparer U5 is by the second adjustable resistance R16 ground connection, the inverting input of the second comparer U5 also meets positive 5V by resistance R 14 simultaneously, the output terminal of the second comparer U5 with connect positive 5V voltage by the second pull-up resistor R6;
The anodic bonding of the output terminal of described the first comparer and described the first diode, the anodic bonding of the output terminal of described the second comparer and described the second diode;
The negative electrode of the negative electrode of described the first diode and the second diode connects, and link is connected with described warning indicating circuit.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, described warning indicating circuit comprises green LED, red LED, hummer, four-operational amplifier, the first triode, the second triode, the 3rd triode;
The normal phase input end of described four-operational amplifier is connected with the negative electrode of described the first diode, the output terminal of described four-operational amplifier is connected with the inverting input of described four-operational amplifier, the output terminal of described four-operational amplifier is also connected with the base stage of described the first triode, the output terminal of described four-operational amplifier and the anodic bonding of described green LED, the plus earth of described green LED;
The collector of described the first triode connects positive 5V voltage, the grounded emitter of described the first triode;
The base stage of described the second triode is connected with the collector of described the first triode, the grounded emitter of described the second triode, and the collector of described the second triode is connected with the negative electrode of described red LED, and the anode of described red LED connects positive 5V voltage;
The base stage of described the 3rd triode is connected with the output terminal of described four-operational amplifier, the grounded emitter of described the 3rd triode, and the collector of described the 3rd triode is connected with described hummer.
Preferably, according to above-mentioned safe electrical verification and discharge instrument, also comprise the 3rd diode, described the 3rd diode is in parallel with described green LED, and described the 3rd anode of diode and the negative electrode of described green LED are connected, described the 3rd negative electrode of diode and the anodic bonding of described green LED.
The safe electrical verification that utility model provides and the probe of discharge instrument are connected with wiring board, wiring board is fixed in insulation crust, operating side (probe and handle) isolates completely with test lead (wiring board), and entirety, in safe current potential, can guarantee user's safety.In addition, the safe electrical verification that the utility model provides and the shell of discharge instrument and handle are insulating material or metal material and cover insulating material outward and make, and can guarantee instrument user's safety.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
The safe electrical verification that Fig. 1 provides for the utility model embodiment and a kind of structural representation of discharge instrument;
A kind of structural representation of the electrical verification electric discharge body that Fig. 2 provides for the utility model embodiment;
A kind of structural representation of circuit on the wiring board that Fig. 3 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Referring to Fig. 1, the utility model embodiment provides a kind of safe electrical verification and discharge instrument, for electric system capacitive apparatus, as electrical verification and electric discharge after capacitor power-off, safe electrical verification and discharge instrument comprise electrical verification electric discharge body, ground terminal 020, and the hook 030 being connected with ground terminal 020.Electrical verification electric discharge body comprises probe 011, insulation crust 012 and the insulated handle 013 being connected with insulation crust 012.
Other capacitive apparatus in addition of Operation of Electric Systems, for example: high-tension cable, the electric capacity end shields of capacitance type potential transformer and high-tension current inductor etc., this kind equipment all can adopt electrical verification and the electric discharge of safe electrical verification and the discharge instrument residual voltage after having a power failure.
Referring to Fig. 2, Fig. 2 shows a kind of structural representation of electrical verification electric discharge body.
Electrical verification electric discharge body comprises probe 011, insulation crust 012 and the insulated handle 013 being connected with insulation crust 012.In the inner chamber of insulation crust 012, be provided with wiring board 0121 and fixed head 0122, wiring board 0121 is fixing with insulation crust 012 by fixed head 0122.
On wiring board 0121, be provided with ceramic discharge tube, and not shown ceramic discharge tube, bleeder circuit, buffer circuit, booster circuit, comparator circuit in the bleeder circuit being connected successively with ceramic discharge tube, buffer circuit, booster circuit, comparator circuit and warning indicating circuit 01211(Fig. 2).
Probe 011 is connected with one end of ceramic discharge tube, and the other end of ceramic discharge tube is connected with ground terminal by ground wire 014, referring to Fig. 1.Further, ceramic discharge tube can be inserted in the circuit board.
In the time that capacitive equipment reliably disconnects from electrical network as capacitive capacitor, use the electroscope of relevant voltage grade carry out electrical verification determine capacitive capacitor with electrical network without being connected, afterwards, hook 030 is connected with one end of capacitive capacitor, probe 011 inserts the other end of capacitive capacitor.Probe 011 is connected with one end of ceramic discharge tube, and the other end of ceramic discharge tube is connected with ground terminal by ground wire.If capacitor voltage at both ends is during higher than predeterminated voltage, ceramic discharge tube conducting, capacitive capacitor discharge, drops to below predeterminated voltage its voltage.In the time that capacitive condenser voltage drops in predeterminated voltage, ceramic discharge tube turn-offs, the bleeder circuit being connected successively with ceramic discharge tube carries out dividing potential drop, voltage through buffer circuit, booster circuit and comparator circuit to voltage, finally drives the indication of reporting to the police of warning indicating circuit.The safe electrical verification that the utility model provides and the probe of discharge instrument are connected with wiring board, wiring board is fixed in insulation crust, operating side (probe and handle) isolates completely with test lead (wiring board), and entirety, in safe current potential, can guarantee user's safety.In addition, the safe electrical verification that the utility model provides and the shell of discharge instrument and handle are insulating material or metal material and cover insulating material outward and make, and can guarantee instrument user's safety.
Further, above-mentioned insulation crust can be cylindrical shape, the sound light alarming circuit of safe electrical verification and discharge instrument is all placed in insulation crust, warning indicating circuit can comprise pilot lamp and alarm, the bottom of insulation crust is also provided with the aperture 015 of viewing lamp, and observe the transparent window 016 of described ceramic discharge tube, referring to Fig. 1.See through insulation crust and can see intuitively the duty of sound light alarming circuit.Top and the bottom of insulation crust are respectively arranged with through hole, and probe and insulated handle are fixed by through hole and insulation crust respectively.Further, the bottom for insulation crust being connected with insulated handle 013, the top of the insulation crust being connected with probe 011, insulated handle 013 is through the through hole on the bottom of insulation crust, fixing with insulation crust 012 by nut 0125, probe 011 is through the through hole on the top of insulation crust, fixing with insulation crust 012 by nut 0126, wiring board 0121 is connected with fixed head 0122 by bolt 0123, more fixing with bolt 0123 by nut 0124.Fixed head 0122 is fixing with insulation crust 012.
Referring to Fig. 3, show a kind of structural representation of circuit on wiring board.The bleeder circuit 2, buffer circuit 3, booster circuit 4, comparator circuit 5 and the warning indicating circuit 6 that on wiring board, are provided with ceramic discharge tube 1, are connected successively with ceramic discharge tube 1.
Ceramic discharge tube 1 is in parallel with capacitive apparatus 7, and in the time that capacitive condenser voltage is too high, ceramic discharge tube 1 discharges for overtension.Also do not make at present the device of voltage checking of ceramic discharge tube.
Bleeder circuit 2 comprises the first resistance R 1 and the second resistance R 2.One end of the first resistance R 1 is connected with the first end of ceramic discharge tube 1, and the other end of the first resistance R 1 is connected with the first end of the second resistance R 2, and the first end of the second resistance R 2 is also connected with buffer circuit 3; The second end of the second resistance R 2 is connected with the second end of ceramic discharge tube 1.The first resistance R 1 and the second resistance R 2 form bleeder circuit, by dropping to suitable size by the voltage of ceramic discharge tube 1, relatively use for computing, and wherein, it is the resistance of 51K Ω that the first resistance R 1 can be selected resistance, and the second resistance R 2 can be selected the resistance of 1K Ω.
Buffer circuit 3 comprises the first operational amplifier U1.The first connect+5V of operational amplifier U1 ,-5V voltage.The in-phase input end of the first operational amplifier U1 is connected with the first end of the second resistance R 2, and the output terminal of the first operational amplifier U1 is connected with the inverting input of self; The output terminal of the first operational amplifier U1 is also connected with booster circuit 4.Wherein, the first operational amplifier U1 can select LM324 amplifier, and the first operational amplifier U1 plays isolation in circuit, prevents the calculating comparison of front end impedance influences subsequent conditioning circuit.
Booster circuit 4 comprises the second operational amplifier U2, the 3rd operational amplifier U3, the 3rd resistance R 3, the 4th resistance R 4, the first divider resistance R11 and the second divider resistance R12.
The first end of the first divider resistance R11 with connect positive 5V voltage and be connected, the second end of the first divider resistance R11 is connected with the first end of the second divider resistance R12, the second end ground connection of the second divider resistance R12, the first end of the second divider resistance R12 is connected with the in-phase input end of the second operational amplifier U2.
The output terminal of the second operational amplifier U2 is connected with the inverting input of self, the output terminal of the second operational amplifier U2 is also connected with the in-phase input end of the 3rd operational amplifier U3 by the 3rd resistance R 3, and the in-phase input end of the 3rd operational amplifier U3 is also connected with the output terminal of the first operational amplifier U1 by the 4th resistance R 4.
The inverting input of the 3rd operational amplifier U3 is connected with the output terminal of self, and the output terminal of the 3rd operational amplifier U3 is connected with comparator circuit 5.
Wherein, the 3rd resistance R 3 can select resistance be resistance, the 4th resistance R 4 of 20K Ω can select resistance be resistance, the first divider resistance R11 of 20K Ω can to select resistance be the resistance of 3M Ω, and the second divider resistance R12 can to select resistance be the resistance of 3M Ω.
R11 and R12 are bleeder circuit, and U2 plays buffer action, R11, R12, U2 together with R3, R4, U3 by input voltage lifting 2V.
Comparator circuit 5 comprises the first comparer U4, the second comparer U5, the first diode D1, the second diode D1, the first adjustable resistance R15, the second adjustable resistance R16, the first pull-up resistor R5 and the second pull-up resistor R6.Wherein, can to select nominal value be that can to select nominal value be that can to select resistance be that can to select resistance be the resistance of 10K Ω for resistance, the second pull-up resistor R6 of 10K Ω for resistance, the first pull-up resistor R5 of 100K Ω for potentiometer, the second adjustable resistance R16 of 10K Ω to the first adjustable resistance R15.The first comparer U4 and the second comparer U5 can select LM393 comparer.
One end of the first adjustable resistance R15 is connected with the normal phase input end of the first comparer U4, the first adjustable resistance R15 other end ground connection.
The normal phase input end of the first comparer U4 can connect positive 5V voltage by resistance R 13, and the inverting input of the first comparer U4 is connected with the output terminal of the 3rd operational amplifier U3, and the output terminal of the first comparer U4 connects positive 5V voltage by the first pull-up resistor R5.It is the resistance of 20K Ω that resistance R 13 can be selected resistance.
The normal phase input end of the second comparer U5 is connected with the output terminal of the 3rd operational amplifier U3, the inverting input of the second comparer U5 is by the second adjustable resistance R16 ground connection, the inverting input of the second comparer U5 also meets positive 5V by resistance R 14 simultaneously, the output terminal of the second comparer U5 with connect positive 5V voltage by the second pull-up resistor R6.It is the resistance of 20K Ω that resistance R 14 can be selected resistance.
The anodic bonding of the output terminal of the first comparer U4 and the first diode D1, the anodic bonding of the output terminal of the second comparer U5 and the second diode D2.
The negative electrode of the negative electrode of the first diode D1 and the second diode D2 connects, and link is connected with warning indicating circuit 6.
The first comparer U4, the second comparer U5 can select LM393 comparer, U4 and U5 are by regulating adjustable resistance R15 and R16 to regulate the size of alarm voltage as 12V or 24V, U4 and U5 are for opening drain electrode output, can not export high level, therefore increase R5 and R6 as pull-up resistor, diode D1 and D2 act as the output phase mutual interference that prevents comparer.
Warning indicating circuit 6 comprises green LED 61, red LED 62, hummer LS1, four-operational amplifier U6, the first triode Q1, the second triode Q2, the 3rd triode Q3.
The normal phase input end of four-operational amplifier U6 is connected with the negative electrode of the first diode D1, the output terminal of four-operational amplifier U6 is connected with the inverting input of four-operational amplifier U6, the output terminal of four-operational amplifier U6 is also connected with the base stage of the first triode Q1 by resistance R 8, the output terminal of four-operational amplifier U6 also with the anodic bonding of green LED 61, the negative electrode of green LED 61 is by R7 ground connection.It is the resistance of 200 Ω that resistance R 7 can be selected resistance, and it is the resistance of 2K Ω that resistance R 8 can be selected resistance.
The collector of the first triode Q1 connects positive 5V voltage, the grounded emitter of the first triode Q1 by resistance R 9.It is the resistance of 10K Ω that resistance R 9 can be selected resistance.It is the resistance of 2K Ω that resistance R 10 can be selected resistance.
The base stage of the second triode Q2 is connected with the collector of the first triode Q1 by resistance R 10, the grounded emitter of the second triode Q2, the collector of the second triode Q2 is connected with the negative electrode of red LED 62, and the anode of red LED 62 connects positive 5V voltage with crossing resistance R 11.It is the resistance of 200 Ω that resistance R 11 can be selected resistance,
The base stage of the 3rd triode Q3 is connected with the output terminal of four-operational amplifier U6 by resistance R 17, the grounded emitter of the 3rd triode Q3, and the collector of the 3rd triode Q3 is connected with hummer LS1.It is the resistance of 1K Ω that resistance R 17 can be selected resistance.
The Main Function of U6 drives green LED exactly, and the Main Function of Q1 and Q2 is to drive red LED, and the Main Function of Q3 is to drive hummer sounding.
Further, circuit board also comprises the 3rd diode D3, and the 3rd diode D3 is in parallel with green LED 61, and the anode of the 3rd diode D3 is connected with the negative electrode of green LED 61, the anodic bonding of the negative electrode of the 3rd diode D3 and green LED 61.
Further, circuit board also comprises the 4th diode D4, and the 4th diode D4 is in parallel with hummer LS1, and the anode of the 4th diode D4 is connected with the collector of the 3rd triode Q3, and the negative electrode of the 4th diode D4 connects 5V voltage.
Because hummer is perceptual device, when shutoff, may produce reverse induction electric current, therefore increase D4 is fly-wheel diode.
In other embodiment of the present utility model, above-mentioned the first operational amplifier, the second operational amplifier, the 3rd operational amplifier, four-operational amplifier can Wei Si road operational amplifiers.
If capacitive apparatus is as the both end voltage of capacitor during higher than 75V, ceramic discharge tube 1 conducting, capacitor is now equivalent to short circuit dischange, in condenser voltage drops to 75V time, ceramic discharge tube 1 turn-offs, and the first resistance R 1 and the second resistance R 2 are carried out dividing potential drop, after the comparator circuit 5 of buffer circuit 3, booster circuit 4, employing comparer, when capacitor voltage at both ends is during higher than 12V, operational amplifier drives green LED 61 bright; When condenser voltage is during lower than 12V, red LED 62 is bright.
The main power consumption of circuit is red green LED and hummer, LED electric current be 15mA/ only, hummer 20mA, the quiescent current of amplifier LM324 and comparer LM393 and be 2.2mA; This circuit maximum current can not exceed 40mA, because red green LED can be simultaneously not bright.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
Finally, also it should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. safe electrical verification and a discharge instrument, for electrical verification and the electric discharge of electric system capacitive apparatus, is characterized in that, comprises electrical verification electric discharge body, ground terminal, and the hook being connected with described ground terminal;
Described electrical verification electric discharge body comprises probe, insulation crust and the insulated handle being connected with described insulation crust;
In the inner chamber of described insulation crust, be provided with wiring board and fixed head, fixed head and described insulation crust are fixed, and described wiring board is fixed by described fixed head and described insulation crust;
On described wiring board, be provided with ceramic discharge tube, and the bleeder circuit, buffer circuit, booster circuit, comparator circuit and the warning indicating circuit that are connected successively with described ceramic discharge tube;
Described probe is connected with one end of described ceramic discharge tube, and the other end of described ceramic discharge tube is connected with described ground terminal by ground wire.
2. safe electrical verification according to claim 1 and discharge instrument, is characterized in that, described insulation crust is cylindrical shape;
Top and the bottom of described insulation crust are respectively arranged with through hole, and described probe and described insulated handle are fixed by described through hole and described insulation crust respectively.
3. safe electrical verification according to claim 2 and discharge instrument, it is characterized in that, described warning indicating circuit comprises pilot lamp and alarm, and the bottom of described insulation crust is also provided with the aperture of observing described pilot lamp, and observes the transparent window of described ceramic discharge tube.
4. safe electrical verification according to claim 1 and discharge instrument, is characterized in that, described ceramic discharge tube is inserted on described wiring board.
5. safe electrical verification according to claim 1 and discharge instrument, is characterized in that, described bleeder circuit comprises the first resistance and the second resistance;
One end of described the first resistance is connected with the first end of described ceramic discharge tube, and the other end is connected with the first end of described the second resistance, and the first end of described the second resistance is also connected with described buffer circuit;
The second end of described the second resistance is connected with the second end of described ceramic discharge tube.
6. safe electrical verification according to claim 5 and discharge instrument, is characterized in that, described buffer circuit comprises the first operational amplifier;
The in-phase input end of described the first operational amplifier is connected with the first end of described the second resistance, and the output terminal of described the first operational amplifier is connected with inverting input;
Described output terminal is also connected with described booster circuit.
7. safe electrical verification according to claim 6 and discharge instrument, is characterized in that, described booster circuit comprises the second operational amplifier, the 3rd operational amplifier, the 3rd resistance, the 4th resistance, the first divider resistance and the second divider resistance;
The first end of described the first divider resistance with connect positive 5V voltage and be connected, the second end is connected with the first end of described the second divider resistance, the second end ground connection of described the second divider resistance, the first end of described the second divider resistance is connected with the in-phase input end of described the second operational amplifier;
The output terminal of described the second operational amplifier is connected with the inverting input of self, the output terminal of described the second operational amplifier is also connected with the in-phase input end of described the 3rd operational amplifier by described the 3rd resistance, and the in-phase input end of described the 3rd operational amplifier is also connected with the output terminal of described the first operational amplifier by described the 4th resistance;
The inverting input of described the 3rd operational amplifier is connected with the output terminal of self, and the output terminal of described the 3rd operational amplifier is connected with comparator circuit.
8. safe electrical verification according to claim 7 and discharge instrument, it is characterized in that, described comparator circuit comprises the first comparer, the second comparer, the first diode, the second diode, the first adjustable resistance, the second adjustable resistance, the first pull-up resistor and the second pull-up resistor;
One end of described the first adjustable resistance is connected with the normal phase input end of described the first comparer, other end ground connection;
The normal phase input end of described the first comparer also connects positive 5V voltage, and the inverting input of described the first comparer is connected with the output terminal of described the 3rd operational amplifier, and the output terminal of described the first comparer connects positive 5V voltage by described the first pull-up resistor;
The normal phase input end of described the second comparer is connected with the output terminal of described the 3rd operational amplifier, the inverting input of the second comparer U5 is by the second adjustable resistance R16 ground connection, the inverting input of the second comparer U5 also meets positive 5V by resistance R 14 simultaneously, the output terminal of the second comparer U5 with connect positive 5V voltage by the second pull-up resistor R6;
The anodic bonding of the output terminal of described the first comparer and described the first diode, the anodic bonding of the output terminal of described the second comparer and described the second diode;
The negative electrode of the negative electrode of described the first diode and the second diode connects, and link is connected with described warning indicating circuit.
9. safe electrical verification according to claim 8 and discharge instrument, is characterized in that, described warning indicating circuit comprises green LED, red LED, hummer, four-operational amplifier, the first triode, the second triode, the 3rd triode;
The normal phase input end of described four-operational amplifier is connected with the negative electrode of described the first diode, the output terminal of described four-operational amplifier is connected with the inverting input of described four-operational amplifier, the output terminal of described four-operational amplifier is also connected with the base stage of described the first triode, the output terminal of described four-operational amplifier and the anodic bonding of described green LED, the plus earth of described green LED;
The collector of described the first triode connects positive 5V voltage, the grounded emitter of described the first triode;
The base stage of described the second triode is connected with the collector of described the first triode, the grounded emitter of described the second triode, and the collector of described the second triode is connected with the negative electrode of described red LED, and the anode of described red LED connects positive 5V voltage;
The base stage of described the 3rd triode is connected with the output terminal of described four-operational amplifier, the grounded emitter of described the 3rd triode, and the collector of described the 3rd triode is connected with described hummer.
10. safe electrical verification according to claim 9 and discharge instrument, it is characterized in that, also comprise the 3rd diode, described the 3rd diode is in parallel with described green LED, and described the 3rd anode of diode and the negative electrode of described green LED are connected, described the 3rd negative electrode of diode and the anodic bonding of described green LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320641537.7U CN203616381U (en) | 2013-10-16 | 2013-10-16 | Safety inspection and discharge tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320641537.7U CN203616381U (en) | 2013-10-16 | 2013-10-16 | Safety inspection and discharge tester |
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| Publication Number | Publication Date |
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| CN203616381U true CN203616381U (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320641537.7U Expired - Fee Related CN203616381U (en) | 2013-10-16 | 2013-10-16 | Safety inspection and discharge tester |
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| CN (1) | CN203616381U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459358A (en) * | 2014-11-10 | 2015-03-25 | 国家电网公司 | Detection device for residual charge of high-voltage electrical equipment |
| CN112485501A (en) * | 2020-11-20 | 2021-03-12 | 贵州电网有限责任公司 | Distribution transformer earth connection alarm device |
| RU221473U1 (en) * | 2022-06-09 | 2023-11-08 | Игорь Сергеевич Козыревич | SINGLE POLE HIGH VOLTAGE INDICATOR WITH BUILT-IN TEST DEVICE |
-
2013
- 2013-10-16 CN CN201320641537.7U patent/CN203616381U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459358A (en) * | 2014-11-10 | 2015-03-25 | 国家电网公司 | Detection device for residual charge of high-voltage electrical equipment |
| CN112485501A (en) * | 2020-11-20 | 2021-03-12 | 贵州电网有限责任公司 | Distribution transformer earth connection alarm device |
| RU221473U1 (en) * | 2022-06-09 | 2023-11-08 | Игорь Сергеевич Козыревич | SINGLE POLE HIGH VOLTAGE INDICATOR WITH BUILT-IN TEST DEVICE |
| RU221509U1 (en) * | 2022-06-09 | 2023-11-09 | Игорь Сергеевич Козыревич | SINGLE POLE HIGH VOLTAGE MULTIFUNCTIONAL INDICATOR |
| RU221510U1 (en) * | 2022-06-09 | 2023-11-09 | Игорь Сергеевич Козыревич | SINGLE POLE HIGH VOLTAGE MULTIFUNCTIONAL INDICATOR |
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