CN204575784U - A kind of mine electrical appliance leak(age) test tester - Google Patents
A kind of mine electrical appliance leak(age) test tester Download PDFInfo
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- CN204575784U CN204575784U CN201420460136.6U CN201420460136U CN204575784U CN 204575784 U CN204575784 U CN 204575784U CN 201420460136 U CN201420460136 U CN 201420460136U CN 204575784 U CN204575784 U CN 204575784U
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Abstract
A kind of mine electrical appliance leak(age) test tester disclosed in the utility model, comprise casing and be hinged on the case lid on described casing, tester is provided with in described casing, described tester comprises testing circuit board and panel, described panel is provided with earth leakage search/lockout test conversion switch element, electric leakage motion test switch elements, test selective switchgear unit, measure and test switch, LCDs, external electric supply socket, power switch, a pair resistance output plug and resistance the Show Button switch, described earth leakage search/lockout test conversion switch element, electric leakage motion test switch elements, test selective switchgear unit, measure and test switch, LCDs, external electric supply socket, power switch, a pair resistance output plug is connected with the relevant interface on described testing circuit board with resistance the Show Button switch.The utility model for having the detection of all kinds of flame-proof switches of creepage protection function, the quality inspection of the applying units such as the manufacturing plant that the amount of can be used for is large, wide simultaneously and colliery.
Description
Technical field
The utility model relates to electric test equipment technical field, particularly a kind of mine electrical appliance leak(age) test tester.
Background technology
The leak current fault that Coal Mine Electromotor and supply line thereof occur common are following several: (1) makes motor and supply line's insulation resistance thereof decline owing to making moist, leakage current increase make motor casing and electric appliance casing charged; (2) motor and supply line's insulation thereof are because of aging, mechanical damage or the voltage endurance reason such as to puncture, and make a phase ground connection (metallic earthing or arc grounding); (3) exposed part when maintenance (damage if any mechanicalness or) of motor and supply line's electrified body thereof is by personnel directly or by conductive body contact such as instruments, causes the electric shock accidents (contingency, transience) of a phase ground connection.
And electric leakage can bring following harm: (1) produces electric spark, can cause gas, coal dust explosion.(2) danger of personal life is likely caused.(3) ahead detonate electric detonator.(4) electric leakage long-term existence, causes phase fault.
Therefore, protect not in time once there is leak current fault, have serious consequence at underground coal mine.Safety regulations in coal mine regulation must carry out earth leakage protection to Coal Mine Electromotor and supply line thereof for this reason, and using earth leakage protection as one of underground coal mine electrical equipment " three protect greatly ".The protection systems such as leak current fault testing circuit and earth leakage search/lockout are all provided with by " safety regulations in coal mine " regulation in the products such as the anti-explosion is electromagnetic trigger that China produces and explosion-proof feed switch.How correct in the products such as detection flame-proof switch, whether Parameters of Earth-Leakage Protection meets the requirements, and is the important prerequisite ensureing product quality.
Earth leakage protection test is divided into earth leakage protection resistance to test and actuation time is tested two large divisions in electric leakage.The test of earth leakage protection resistance should accurately measure the action resistance of switch protector, to judge whether to meet standard-required; The electric leakage action protection time of electric leakage test actuation time main test feeding switch, the electric pressure time requirement difference that standard-required is different, but all within 200ms, so measure the means becoming actuation time and differentiate switch quality accurately.
But at present to this big event, manufacturing plant, inspection center and applying unit all do not have the checkout equipment of specialty, generally adopt the instrument combined measurement such as " resistance box ", timer, there is the defects such as detection efficiency is not high, detected value easily drifts about, timing error is large.Traditional action timing is the assist in synchronization node adopting switch, and measure the actuation time of synchronization node when protector action, need use 5 p-wires during measurement, circuit is loaded down with trivial details, and usually brings excessive measuring error; Some tests adopt oscillographic method, but its use cost is high, inapplicable with a large amount of debugging demands on switch product production line.Therefore new detection technique is adopted to solve these problems particularly important, to improve earth leakage protective detection means.
Utility model content
Technical problem to be solved in the utility model is for the problem existing for prior art and provides a kind of mine electrical appliance leak(age) test tester; this mine electrical appliance leak(age) test tester adopts and detects new method that leakage current carrys out triggering timing signal to measure earth leakage protection actuation time; only need 2 p-wires can reach the object of test; accurate timing, measuring circuit are simply simultaneously, and test efficiency is high, measurement parameter digitizing display.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
A kind of mine electrical appliance leak(age) test tester, comprise casing and be hinged on the case lid on described casing, tester is provided with in described casing, described tester comprises testing circuit board and panel, described panel is provided with earth leakage search/lockout test conversion switch element, electric leakage motion test switch elements, test selective switchgear unit, measure and test switch, LCDs, external electric supply socket, power switch, a pair resistance output plug and resistance the Show Button switch, described earth leakage search/lockout test conversion switch element, electric leakage motion test switch elements, test selective switchgear unit, measure and test switch, LCDs, external electric supply socket, power switch, a pair resistance output plug is connected with the relevant interface on described testing circuit board with resistance the Show Button switch.
In a preferred embodiment of the present utility model, described testing circuit board is provided with governor circuit, DC power supply circuit, start isolating switch, resistance measurement contactor, starting characteristics test contactor, 1K resistance, latch-up resistance, leak resistance summation current transformer, isolating switch of wherein starting shooting is subject to the control of power switch, the input end of this start isolating switch connects live wire and the zero line of external electric supply socket, the output terminal of start isolating switch connects the input end of described DC power supply circuit, and the output terminal of described DC power supply circuit is exported to governor circuit and powered; The live wire of the output terminal of the line bag KM2 of described resistance measurement contactor, the line bag KM1 mono-termination start isolating switch of starting characteristics test contactor, the line bag KM2 of described resistance measurement contactor, the other end of starting characteristics test contactor KM1 connect the zero line of the output terminal of start isolating switch by test selective switchgear unit; One end of starting characteristics test contactor a pair normally open contact KM1-1, KM1-2 is connected respectively to a pair described resistance output plug; One end of described 1K resistance, latch-up resistance, leak resistance is also connected in interface corresponding to described governor circuit after connecing, the other end of described 1K resistance, latch-up resistance, leak resistance is connected to by earth leakage search/lockout test conversion switch element on the output terminal of starting characteristics test contactor normally open contact KM1-1, and the output terminal of starting characteristics test contactor normally open contact KM1-2 is connected to states 1K resistance, latch-up resistance, leak resistance on the one end connect; Current transformer is enclosed within described 1K resistance, latch-up resistance, leak resistance on the circuit connected between the interface corresponding with described governor circuit of the one end connect, the output terminal of current transformer is connected in interface corresponding to described governor circuit; The output terminal of one end joint test contactor normally open contact KM1-1 of the normally open contact KM2-1 in resistance measurement contactor, the other end of normally open contact KM2-1 is connected in interface corresponding to described governor circuit; The two ends of the interlock circuit that the normally open contact KM2-2 in resistance measurement contactor and described resistance the Show Button switch are formed after connecting are connected in interface corresponding to described governor circuit respectively; Described governor circuit is connected with described LCDs.
Owing to have employed technical scheme as above, the utility model can realize following functions and detect:
1, earth leakage search/lockout measuring ability:
Meet 380V, 660V, 1140V, 3300V Mine Switch earth leakage search/lockout measuring ability, detect resistance 0 ~ 150k Ω, possesses electric pressure selection function, be equipped with resistance 25W, measuring accuracy 0.5%, for ensureing resistance measurement precision, sized by resistance divides, resistance switches, and is furnished with resistor trimming function simultaneously.
2, electric leakage action protection function:
Meet 380V, 660V, 1140V, 3300V Mine Switch electric leakage motion detection functionality, detect resistance 0 ~ 150k Ω, possesses electric pressure selection function, be equipped with resistance 25W, measuring accuracy 0.5%, for ensureing resistance measurement precision, sized by resistance divides, resistance switches, and is furnished with resistor trimming function simultaneously.
3, leak electricity actuation time:
Meet 380V, 660V, 1140V, 3300V Mine Switch 1k Ω Leaked Current of Line to Ground action time detecting function, detect resistance 1k Ω, possess electric pressure selection function, measuring accuracy 0.5%, actuation time, precision was 1ms.
The utility model, compared with existing earth leakage protection proving installation, has following innovative point:
1, adopt PIC single chip microcomputer development system to be core, undertaken detecting and judge by single-chip microcomputer, detect the timing of leakage current triggering mode in real time, circuit is simple.
2, the push button panel adopting instruction classification to arrange is human-computer interaction interface, embodies handling safety, flexible, easy feature.
3, be directed to the method for instrument combined measurements such as original " resistance boxes ", " timer " that adopt, there is the defects such as detection efficiency is not high, detected value easily drifts about, timing error is large, the measurement of this tester only needs 2 p-wires, completes all test events.Solve and originally need use 5 p-wires to test the problems such as the circuit brought is loaded down with trivial details, measuring error is excessive.
The utility model for having the detection of all kinds of flame-proof switches of creepage protection function, the quality inspection of the applying units such as the manufacturing plant that the amount of can be used for is large, wide simultaneously and colliery.
Accompanying drawing explanation
Fig. 1 is the electric principle schematic of the utility model mine electrical appliance leak(age) test tester.
Fig. 2 is the panel construction schematic diagram of the utility model mine electrical appliance leak(age) test tester.
Fig. 3 is the schematic diagram of the DC power supply circuit of the utility model mine electrical appliance leak(age) test tester.
Fig. 4 is the electrical schematic diagram of the governor circuit of the utility model mine electrical appliance leak(age) test tester.
Fig. 5 is the test philosophy schematic diagram of the utility model mine electrical appliance leak(age) test tester.
Embodiment
A kind of mine electrical appliance leak(age) test tester provided in figure, comprises casing (not shown) and is hinged on the case lid (not shown) on casing, in casing, be provided with tester.
Tester comprises testing circuit board and panel 100, see Fig. 2, be provided with earth leakage search/lockout test conversion switch element 110 on panel 100, electric leakage motion test switch elements 120, test selective switchgear unit 130, measure and test switch 140, LCDs 150, external electric supply socket 160, power switch 170, a pair resistance output plug 180 and resistance the Show Button switch 190, earth leakage search/lockout test conversion switch element 110, electric leakage motion test switch elements 120, test selective switchgear unit 130, measure and test switch 140, LCDs 150, external electric supply socket 160, power switch 170, a pair resistance output plug 180 is connected with the relevant interface on testing circuit board with resistance the Show Button switch 190.
Earth leakage search/lockout test conversion switch element 110 comprises earth leakage search/lockout test conversion switch 111 and two resistor trimming knobs 112,113, in process of the test, and the resistance that earth leakage search/lockout test conversion switch 111 can be different in switching tests process.
Electric leakage motion test switch elements 120 comprises electric leakage motion test switch 121 and two voltage trim knobs 122,123, and in process of the test, electric leakage motion test switch 121 can switch different electric pressures.Meet 380V, 660V, 1140V, 3300V Mine Switch electric leakage motion detection functionality.
Test selective switchgear unit 130 is in locking test, switch between action test and 1K action test.
Measure and test switch 140 to switch between resistance measurement and running-up test
See Fig. 1, testing circuit board is provided with governor circuit 210, DC power supply circuit 220, start isolating switch 230, resistance measurement contactor, starting characteristics test contactor, 1K resistance 260, latch-up resistance 270, leak resistance 280 summation current transformer 290.
Start isolating switch 230 is by the control of power switch 170, the input end of this start isolating switch 230 connects live wire and the zero line of external electric supply socket 160, output terminal connects the input end of DC power supply circuit 220, and the output terminal of DC power supply circuit 220 is exported to governor circuit 210 and powered.
The live wire of the output terminal of the line bag KM2 of resistance measurement contactor, the line bag KM1 mono-termination start isolating switch 230 of starting characteristics test contactor, the other end of the line bag KM2 of resistance measurement contactor, the line bag KM1 of starting characteristics test contactor connects the zero line of the output terminal of start isolating switch 230 by test selective switchgear unit 130; One end of starting characteristics test contactor a pair normally open contact KM1-1, KM1-2 is connected respectively to a pair resistance output plug 180.
One end of 1K resistance 260, latch-up resistance 270, leak resistance 280 is also connected in the interface of governor circuit 210 correspondence after connecing, the other end of 1K resistance 260, latch-up resistance 270, leak resistance 280 is connected to by earth leakage search/lockout test conversion switch element 120 on the output terminal of starting characteristics test contactor normally open contact KM1-1, and the output terminal of starting characteristics test contactor normally open contact KM1-2 is connected to 1K resistance 260, latch-up resistance 270, leak resistance 280 on the one end connect; Current transformer 290 is enclosed within 1K resistance 260, latch-up resistance 270, leak resistance 280 on the circuit connected between the interface corresponding with governor circuit 210 of the one end connect, the output terminal of current transformer 290 is connected in the interface of governor circuit 210 correspondence; The output terminal of one end joint test contactor normally open contact KM1-1 of the normally open contact KM2-1 in resistance measurement contactor, the other end of normally open contact KM2-1 is connected in the interface of governor circuit 210 correspondence; The two ends of the interlock circuit that the normally open contact KM2-2 in resistance measurement contactor is formed after connecting with resistance the Show Button switch 190 are connected in interface corresponding to governor circuit 210 respectively; Governor circuit 210 is connected with LCDs 150.
See Fig. 3, DC power supply circuit 220 is by input plug J1, transformer T1, T2, diode D1, D2, D3, D4, D5, D6, D7, D8, electric capacity C2, C20, C6, C9, C22, C3, C4, C29, C27, C30, C28, resistance R1, LED 1 and output plug J2, the elementary of transformer T1, T2 is connected on input adapter J1 by a fuse tube F1, and input adapter J1 connects 220V alternating current.The input end of the secondary full bridge rectifier with being made up of diode D1, D2, D3, D4 of transformer T1, the input end of the secondary full bridge rectifier with being made up of diode D5, D6, D7, D8 of transformer T2.
The output terminal of the full bridge rectifier be made up of diode D1, D2, D3, D4 is by being connected to the input end of circuit of three-terminal voltage-stabilizing integrated U1 after the voltage stabilizing of electric capacity C2 and the filtering of electric capacity C20, the output terminal of circuit of three-terminal voltage-stabilizing integrated U1 exports 24V direct supply, and 24V direct supply is by being connected to output plug J2 after the voltage stabilizing of electric capacity C2 and the filtering of electric capacity C20.The 24V power indicating circuit be made up of resistance R1 and LED 1 is also connected on 24V direct supply.
The output terminal of the full bridge rectifier be made up of diode D1, D2, D3, D4 exports two-way direct supply, No. one direct supply is by being connected to the input end of power supply chip U2 after the voltage stabilizing of electric capacity C6 and the filtering of electric capacity C9, the output terminal of power supply chip U2 is by exporting 33V direct supply after the voltage stabilizing of electric capacity C29 and the filtering of electric capacity C27.Be connected to the input end of power supply chip U3 after another road direct supply filtering by electric capacity C22, the output terminal of power supply chip U3 is by exporting 5V direct supply after the voltage stabilizing of electric capacity C30 and the filtering of electric capacity C28.
See Fig. 4, it is C8051 single-chip microcomputer U5 that governor circuit 210 comprises model, single supply level transferring chip U9, three solid-state relay U6, U7, U8, 1 pin of single-chip microcomputer U5 is connected with 12 pin of single supply level transferring chip U9, 2 pin of single-chip microcomputer U5 are connected with 11 pin of single supply level transferring chip U9, 3 pin of single-chip microcomputer U5 are switching signal SW1, 4 pin of single-chip microcomputer U5 meet switching signal SW2, 5 pin of single-chip microcomputer U5 and 6 pin after connecing and on the output terminal of twin voltage comparer U10, the 7 pin ground connection of single-chip microcomputer U5, 8 pin of single-chip microcomputer U5 and 9 pin are empty pin, 10 pin of single-chip microcomputer U5 connect 33V direct supply and by electric capacity C13 ground connection, 11 pin of single-chip microcomputer U5 are by electric capacity C18 ground connection, 12 pin of single-chip microcomputer U5 are empty pin, 13 pin of single-chip microcomputer U5 and 14 pin connect one end of 3 pin that reset reseting interface module J 9 and the 2 pin 14 pin also connecting resistance R12 of single-chip microcomputer U5 simultaneously, 15 of single-chip microcomputer U5, 16, 17, 18, 19, 20, 21, 22 pin connect 14 of LCD interface module J15 respectively, 13, 12, 11, 10, 9, 8, 7 pin, 23 pin of single-chip microcomputer U5 are empty pin, and 24 pin of single-chip microcomputer U5 connect the base stage of triode Q5 by resistance R18,25 pin of single-chip microcomputer U5 and 26 pin are empty pin, 27 of single-chip microcomputer U5, 28, 29, 30, 31 pin connect 16 of LCD interface module J15 respectively, 15, 6, 5, 4 pin, 32 of single-chip microcomputer U5, 33 pin are reserved pin, 34 of single-chip microcomputer U5, 35 pin are empty pin, one end of the 36 pin connecting resistance R17 of single-chip microcomputer U5, 37 pin of single-chip microcomputer U5 are empty pin, one end of the 38 pin connecting resistance R24 of single-chip microcomputer U5, the positive pole of the 39 pin one side sending and receiving optical diode LED3 of single-chip microcomputer U5, on the other hand by electric capacity C16 ground connection, the positive pole of the 40 pin sending and receiving optical diode LED2 of single-chip microcomputer U5, 41 pin of single-chip microcomputer U5 are empty pin, 42 of single-chip microcomputer U5, 43, 44, 45 pin meet triode Q6 respectively, Q4, Q3, the base stage of Q1 accesses one by resistance R10 simultaneously between 45 pin and 46 pin of single-chip microcomputer U5, crystal oscillator X4, electric capacity C24, the clock circuit that C26 is formed, 46 pin of single-chip microcomputer U5 are also connected to the base stage of triode Q2 by resistance R19.
Switching signal SW1, SW2 connect 1,2 pin of switch interface module J 4, and switch interface module J 3 pin ground connection, switching signal SW1, SW2 connect 33V direct supply respectively by resistance R9, R13 in addition.
The negative pole of LED 2 and LED3 connects 33V direct supply respectively by resistance R2, R3.
The other end connecting resistance R11 of resistance R12 and the public connecting end of electric capacity C19, the other end ground connection of electric capacity C19, another termination 33V direct supply of resistance R11.
The output terminal of twin voltage comparer U10 also connects 33V direct supply by resistance R15 on the one hand, the input negative terminal of twin voltage comparer U10 is connect on the other hand by electric capacity C9,1 pin of the input anode of twin voltage comparer U10 one end of contact resistance R9, the negative pole of diode D10, one end of electric capacity C17 and interface module J3 respectively, 2 pin of interface module J3, the other end of resistance R9, the positive pole of diode D10, the other end ground connection of electric capacity C17; The input negative terminal of twin voltage comparer U10 connects one end of electric capacity C7, the sliding-end of potentiometer R30, one end of potentiometer R30 and the other end ground connection of electric capacity C7, one end of the other end connecting resistance R14 of potentiometer R30; More positive termination+5V the direct supply of twin voltage comparer U10 also passes through electric capacity C8 ground connection, the comparison negativing ending grounding of twin voltage comparer U10, a pin of the other end interface module J2 of resistance R14 simultaneously.
One end of resistance R16 is also by electric capacity C16 ground connection, the input anode of another termination twin voltage comparer U5 of resistance R16, the input negative terminal of twin voltage comparer U5 is connected with the output terminal of twin voltage comparer U5, more positive termination+5V the direct supply of twin voltage comparer U5 also passes through electric capacity C1 ground connection, the comparison negativing ending grounding of twin voltage comparer U5 simultaneously.The output terminal of twin voltage comparer U5 is also connected with 1 pin of interface module J2.
One end of 2 pin connecting resistance R25, R26, R27, R28, R29 of interface module J2,7 pin of another termination solid-state relay U6 of resistance R25, R26 and 5 pin, 7 pin of another termination solid-state relay U8 of resistance R27, R28 and 5 pin, 7 pin of another termination solid-state relay U7 of resistance R29.The 8 pin ground connection of 8 pin of 8 pin of solid-state relay U6,6 pin, solid-state relay U8,6 pin, solid-state relay U7,6 pin of solid-state relay U7 and 5 pin ground connection.1 pin of 1 pin of 1 pin of solid-state relay U6,3 pin, solid-state relay U8,3 pin, solid-state relay U7 connects+5V direct supply, 2 pin of 2 pin of 2 pin of solid-state relay U6,4 pin, solid-state relay U8,4 pin, solid-state relay U7 connect the collector of triode Q1, Q3, Q4, Q6, Q7 respectively by resistance R4, R5, R6, R7, R8, the grounded emitter of triode Q1, Q3, Q4, Q6, Q7,3 pin of solid-state relay U7 and 4 pin are empty pin.
2 pin of the other end connection interface module J 2 of resistance R17, one end of resistance R17 also connects the negative pole of diode D9 and one end of electric capacity C21, the positive pole of diode D9 and the other end ground connection of electric capacity C21.
The grounded emitter of triode Q2, collector was connected resistance the Show Button switch 190 and was connect+5V direct supply.
The 1 pin ground connection of LCD interface module J15,2 pin of LCD interface module J15 connect 33V direct supply on the one hand, on the other hand by electric capacity C5 ground connection.3 pin of LCD interface module J15 connect the sliding-end of potentiometer VR1, the one termination 33V direct supply of potentiometer VR1,18 pin of another termination LCD interface module J15 of potentiometer VR1,17 pin and 19 pin of LCD interface module J15 connect 33V direct supply, 20 pin of LCD interface module J15 connect the collector of triode Q5, the grounded emitter of triode Q5.
1 pin of single supply level transferring chip U9 and 3 pin connect the two ends of electric capacity C10,10 pin of single supply level transferring chip U9,8 pin, 9 pin, 7 pin are empty pin, 4 pin of single supply level transferring chip U9 and 5 pin connect the two ends of electric capacity C14, the 15 pin ground connection of the two ends that 15 pin of single supply level transferring chip U9 and 16 pin meet electric capacity C15 simultaneously single supply level transferring chip U9,16 pin of single supply level transferring chip U9 connect 33V direct supply.13 pin of single supply level transferring chip U9 and 14 pin connect 2 pin, 3 pin of RS-233 standard serial port respectively, 5 pin ground connection of RS-233 standard serial port, and all the other pin of single supply level transferring chip U9 are empty pin.
In conjunction with see Fig. 5, test process of the present utility model is as follows:
(1) 220V power lead is inserted on external electric supply socket 160;
(2) two p-wires are adopted to connect on test product and a pair resistance output plug 180; Two p-wire length are 2m, insulation 3300V, end strips clip, and connecing test product shell is black line, and connecing test product leading-out terminal is red line;
(3) press power switch 170, connect start isolating switch 230, now LCDs 150 is bright;
(4) turn test selective switchgear unit 130, Selection experiment type;
(5) as selected locking, then by earth leakage search/lockout test conversion switch element 110, the resistance of latch-up resistance is selected accordingly and set; Measurement and test switch 140 are switched to test gear, starting characteristics test contactor, normally open contact KM1-2 in starting characteristics test contactor closes, and now regulates resistor trimming knob 112, the 113 pairs of resistance in earth leakage search/lockout test conversion switch element 110 to carry out adjustment and is tested to test product action; After test product makes corresponding actions, measurement and test switch 140 are switched to resistance measurement gear, press resistance the Show Button switch 190 simultaneously, the line bag KM1 dead electricity of starting characteristics test contactor, starting characteristics test contactor normally open contact KM1-2 disconnects, the line bag KM2 of resistance measurement contactor obtains electric, and the normally open contact KM2-1 in resistance measurement contactor closes, and LCDs 150 shows resistance value.Again press resistance the Show Button switch 190, the line bag KM2 dead electricity of resistance measurement contactor, the normally open contact KM2-1 in resistance measurement contactor disconnects, and tests next time.
(6) as selected leak(age) test, measurement and test switch 140 are switched to test gear, starting characteristics test contactor, normally open contact KM1-2 in starting characteristics test contactor closes, then by electric leakage motion test switch elements 120, the electric pressure of leak(age) test is selected, then by two voltage trim knobs 122,123 trim voltage in electric leakage motion test switch elements 120, adjustment is carried out to voltage and be tested to test product action, now LCDs 150 shows magnitude of voltage.After having tested, turn test selective switchgear unit 130 to 0, tests next time
(7) as selected 1K resistance test, measurement and test switch 140 are switched to test gear, starting characteristics test contactor, normally open contact KM1-2 in starting characteristics test contactor closes, then by electric leakage motion test switch elements 120, the electric pressure of leak(age) test is selected, then by two voltage trim knobs 122,123 trim voltage in electric leakage motion test switch elements 120, adjustment is carried out to voltage and be tested to test product action, the now display action time in LCDs 150.After having tested, turn test selective switchgear unit 130 to 0, tests next time.
Claims (2)
1. a mine electrical appliance leak(age) test tester, comprise casing and be hinged on the case lid on described casing, tester is provided with in described casing, described tester comprises testing circuit board and panel, described panel is provided with earth leakage search/lockout test conversion switch element, electric leakage motion test switch elements, test selective switchgear unit, measure and test switch, LCDs, external electric supply socket, power switch, a pair resistance output plug and resistance the Show Button switch, described earth leakage search/lockout test conversion switch element, electric leakage motion test switch elements, test selective switchgear unit, measure and test switch, LCDs, external electric supply socket, power switch, a pair resistance output plug is connected with the relevant interface on described testing circuit board with resistance the Show Button switch.
2. a kind of mine electrical appliance leak(age) test tester as claimed in claim 1, it is characterized in that, described testing circuit board is provided with governor circuit, DC power supply circuit, start isolating switch, resistance measurement contactor, starting characteristics test contactor, 1K resistance, latch-up resistance, leak resistance summation current transformer, isolating switch of wherein starting shooting is subject to the control of power switch, the input end of this start isolating switch connects live wire and the zero line of external electric supply socket, the output terminal of start isolating switch connects the input end of described DC power supply circuit, the output terminal of described DC power supply circuit is exported to governor circuit and is powered, the live wire of the output terminal of the line bag KM2 of described resistance measurement contactor, the line bag KM1 mono-termination start isolating switch of starting characteristics test contactor, the line bag KM2 of described resistance measurement contactor, the other end of starting characteristics test contactor KM1 connect the zero line of the output terminal of start isolating switch by test selective switchgear unit, one end of starting characteristics test contactor a pair normally open contact KM1-1, KM1-2 is connected respectively to a pair described resistance output plug, one end of described 1K resistance, latch-up resistance, leak resistance is also connected in interface corresponding to described governor circuit after connecing, the other end of described 1K resistance, latch-up resistance, leak resistance is connected to by earth leakage search/lockout test conversion switch element on the output terminal of starting characteristics test contactor normally open contact KM1-1, and the output terminal of starting characteristics test contactor normally open contact KM1-2 is connected to described 1K resistance, latch-up resistance, leak resistance on the one end connect, current transformer is enclosed within described 1K resistance, latch-up resistance, leak resistance on the circuit connected between the interface corresponding with described governor circuit of the one end connect, the output terminal of current transformer is connected in interface corresponding to described governor circuit, the output terminal of one end joint test contactor normally open contact KM1-1 of the normally open contact KM2-1 in resistance measurement contactor, the other end of normally open contact KM2-1 is connected in interface corresponding to described governor circuit, the two ends of the interlock circuit that the normally open contact KM2-2 in resistance measurement contactor and described resistance the Show Button switch are formed after connecting are connected in interface corresponding to described governor circuit respectively, described governor circuit is connected with described LCDs.
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| CN201420460136.6U CN204575784U (en) | 2014-08-13 | 2014-08-13 | A kind of mine electrical appliance leak(age) test tester |
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| CN201420460136.6U CN204575784U (en) | 2014-08-13 | 2014-08-13 | A kind of mine electrical appliance leak(age) test tester |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108181581A (en) * | 2018-03-19 | 2018-06-19 | 山东省产品质量检验研究院 | The intelligent test device and test method of a kind of residual current action protector |
| CN109459667A (en) * | 2019-01-04 | 2019-03-12 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of controller |
| CN113765052A (en) * | 2021-09-18 | 2021-12-07 | 国网山东省电力公司东营市河口区供电公司 | Multi-loop reusable leakage locking device |
| WO2023116650A1 (en) * | 2021-12-22 | 2023-06-29 | 抚顺中煤科工检测中心有限公司 | Intelligent testing system and method for safety parameters of mine explosion-proof electrical apparatus |
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2014
- 2014-08-13 CN CN201420460136.6U patent/CN204575784U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181581A (en) * | 2018-03-19 | 2018-06-19 | 山东省产品质量检验研究院 | The intelligent test device and test method of a kind of residual current action protector |
| CN108181581B (en) * | 2018-03-19 | 2023-12-22 | 山东省产品质量检验研究院 | Intelligent testing device and testing method for residual current operated protector |
| CN109459667A (en) * | 2019-01-04 | 2019-03-12 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of controller |
| CN109459667B (en) * | 2019-01-04 | 2024-04-09 | 国网江苏省电力有限公司宿迁供电分公司 | Controller |
| CN113765052A (en) * | 2021-09-18 | 2021-12-07 | 国网山东省电力公司东营市河口区供电公司 | Multi-loop reusable leakage locking device |
| WO2023116650A1 (en) * | 2021-12-22 | 2023-06-29 | 抚顺中煤科工检测中心有限公司 | Intelligent testing system and method for safety parameters of mine explosion-proof electrical apparatus |
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