CN202330575U - Protection feature comprehensive test bench of explosion-proof electric appliance - Google Patents
Protection feature comprehensive test bench of explosion-proof electric appliance Download PDFInfo
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- CN202330575U CN202330575U CN2011203929581U CN201120392958U CN202330575U CN 202330575 U CN202330575 U CN 202330575U CN 2011203929581 U CN2011203929581 U CN 2011203929581U CN 201120392958 U CN201120392958 U CN 201120392958U CN 202330575 U CN202330575 U CN 202330575U
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Abstract
The utility model discloses a protection feature comprehensive test bench of an explosion-proof electric appliance. The protection feature comprehensive test bench is composed of a voltage generation main loop, a current control circuit, a simulation capacitance circuit, a voltage control circuit and a current generation part together. Through the circuits, voltage with the voltage level lower than 1140 V, current lower than 6 kA as well as resistance and capacitance needed by a leakage protection test are provided for explosion-proof switches, such as a vacuum feed switch and a vacuum electromagnetic starter.
Description
Technical field
The utility model relates to the explosion-proof electric apparatus testing table.
Technical background
Under coal mine, all be unable to do without explosion-proof electric apparatuses such as vacuum feed switch and starter, no matter new-product development is still gone up well servicing to this electric appliances, all is faced with the test problem of protection feature.Present testing equipment is arranged dispersion, the comprehensive testing equipment that capacity is low, also complete without comparison, and the testing equipment of some big electric current also is single-phase, is sought after a kind of appearance of multi-function test stand.
Summary of the invention
The purpose of the utility model is the deficiency that overcomes prior art; Design a kind of explosion-proof electric apparatus protection feature multi-function test stand; This testing table is applicable to the following vacuum feed switch of 1140V, and explosion-proof electric apparatuses such as vacuum electromagnetic starter transship the test of multinomial protection feature such as short circuit, the phase failure, phase sensitivity, Creepage capacitance, current compensation; And be applicable to the check of explosion-proof electric apparatus phase sensitive short circuit protection attribute testing platform.
The technical scheme of the utility model is:
It is made up of voltage generation major loop, current control circuit, voltage control circuit, electric current generation part, artificial capacitor circuit jointly; Wherein
1, voltage generation major loop; Form by phase shifter, manual voltage regulator, voltage generation transformer, a double-shift type voltage changeover switch and three voltage contactors; The three-phase supply inlet wire connects the first three-phase transformer primary coil through phase shifter and manual voltage regulator; Voltage generation transformer secondary output coil has three groups of taps; Every group of tap connects a voltage contactor respectively through a gear of double-shift type voltage changeover switch, forms the output control circuit of output 100V, 660V, 1140V third gear three-phase voltage; Make third gear voltage adjusted in the 0-110% scope more respectively through manual voltage regulator.
Three voltage generation major loops also comprise display circuit, and display circuit is made up of voltage transformer (VT) and voltage indicator gauge.
2, current control circuit
Current control circuit selects circuit, three-phase current control circuit and three circuit of electric current adjustment output select circuit to form by three-phase magnetic circuit; Wherein
Three-phase magnetic circuit selects control circuit to comprise three groups of two grades of formula magnetic circuits selection change-over switches; Each two grades of formula magnetic circuit selects two gears of change-over switch to export contactor with corresponding a single magnetic circuit output contactor and a double magnetic circuit respectively; Be connected to form three groups of two switching circuits, be respectively applied for the switching of A, B, C three-phase magnetic circuit;
The three-phase current control circuit comprises three groups of Current Control startup/stop buttons on the guidance panel; Connect an electric current output contactor on every group of Current Control startup/stop button; Every group of Current Control start button is connected in parallel on the normally closed auxiliary contact of electric current output contactor again, forms three current control loops; Three current control loops are respectively applied for the control of A, B, C three-phase current;
Electric current adjustment output select circuit is made up of two grades of formula current changeover switch and three-phase current adjustment contactor, and a gear of two grades of formula current changeover switch is connected with three-phase current adjustment contactor and formed the loop, is used for the adjustment of three-phase supply; Three-phase current output contactor is connected with three-phase current output contactor stop button again with after the parallel connection of three-phase current output time relay; Be connected with another gear of two grades of formula current changeover switch again after the series connection; Form the three-phase supply output loop, be used for the output of three-phase supply;
The Current Control part also comprises the display circuit of being made up of the Current Control pilot lamp.
3, simulate condenser network relatively
Simulating relatively capacitive part is made up of three groups of electric capacity and three groups of electric capacity control contactors; Three groups of electric capacity are respectively 0.22 μ F/ phase, 0.47 μ F/ phase, 1.0 μ F/ phases; One end of every group of electric capacity is connected on three phase lines of three-phase supply through an electric capacity control contactor respectively, the other end ground connection of all electric capacity.
4, voltage control circuit selects circuit and three-phase output control circuit to form by adjust control circuit, three-phase voltage grade of three-phase voltage; Wherein
The three-phase voltage control circuit of adjusting is made up of startup/stop button and the three-phase voltage contactor of adjusting of adjusting of one group of three-phase voltage on the guidance panel, and three-phase voltage is adjusted and started stop button and the three-phase voltage contactor of adjusting and connect;
The three-phase voltage grade selects circuit to select change-over switch and three electric pressures to select contactor to form by one group of double-shift type three-phase voltage on the guidance panel; Double-shift type three-phase voltage grade is selected three gears of change-over switch to connect an electric pressure respectively and is selected contactor, and three electric pressures select contactor composition output 100V, 660V, 1140V third gear electric pressure to select control loop;
The three-phase output control circuit is composed in series control circuit by three-phase voltage output control startup/stop button and three-phase voltage output control contactor;
The Control of Voltage part also comprises the display circuit of being made up of the Control of Voltage pilot lamp;
5, electric current generation part
Electric current generation part major loop is made up of the general supply contactor on the guidance panel, three groups of A, B, the manual electric current generation of C three-phase pressure regulator, electric current generation transformer, electric current adjustment contactor, electric current output contactor, single magnetic circuit electric current output contactor and double magnetic circuit electric current output contactors.The primary coil of every phase current generation transformer of A, B, C three-phase is made up of the coil of two parallel connections; The three-phase supply inlet wire connects the electric current output contactor and the electric current adjustment contactor of A, B, C three-phase respectively through the general supply contactor; Be divided into two-way after the electric current adjustment contactor output of every phase; Manual electric current generation pressure regulator and the electric current adjustment contactor of leading up to connects electric current generation transformer first primary coil; Another Lu Jingdan magnetic circuit electric current output contactor, double magnetic circuit electric current output contactor connect electric current generation transformer second primary coil, the two-way parallel connection; The electric current generation transformer secondary output coil of every phase is established first secondary coil and second subprime coil, and first secondary coil is composed in series every electric current output loop mutually with the second subprime coil.
Electric current generation part major loop also comprises the display circuit of being made up of current transformer and electric current indicator gauge.
The good effect of the utility model: the voltage below the electric pressure 1140V, the electric current below the 6kA, the resistance capacitance that the earth leakage protection test is required are provided for the test of flame-proof switches such as vacuum feed switch, vacuum electromagnetic starter.
Description of drawings
Fig. 1---current control circuit figure, Fig. 2--voltage control circuit figure, Fig. 3---current occuring circuit figure, Fig. 4---voltage generation major loop figure, Fig. 5---artificial capacitor circuit diagram.
Among the figure:
Among Fig. 1: the YX-phase shifter; The manual voltage regulator of ST-; YB-voltage generation three-phase transformer; The HY-voltage transformer (VT); V5-voltage indicator gauge; HK7-double-shift type voltage changeover switch;
KM4-100V voltage output contactor, KM5-660V voltage output contactor, KM6-1140V voltage output contactor;
The XD10-100V output indicator, XD11-660V output indicator, XD12-1140V output indicator; The ZTA-three-phase voltage stop button of adjusting, the ZQA-three-phase voltage start button of adjusting, the KM3-three-phase voltage contactor of adjusting, the XD2-three-phase voltage pilot lamp of adjusting;
TA4-three-phase voltage output control stop button, QA4-three-phase voltage output control start button, KM7-three-phase voltage output control contactor, XD3-three-phase voltage output control pilot lamp, XD9-three-phase voltage output control pilot lamp;
Two grades of formula current changeover switch of HK0-, KMZ-three-phase current adjustment contactor, the output of LQA-three-phase current insert button; LTA-three-phase current output stop button; KT-three-phase current output time relay, KM1, KM2 three-phase current output contactor, XD16-three-phase current output indicator;
LQA1-A phase current control start button, LTA1-A phase current control stop button, ZKM1-A phase current output contactor, XD13-A phase current output indicator;
LQA2-B phase current control start button, LTA2-B phase current control stop button, ZKM2-B phase current output contactor, XD14-B phase current output indicator;
LQA3-C phase current control start button, LTA3-C phase current control stop button, ZKM3-C phase current output contactor, XD15-C phase current output indicator;
HK1-A two grades of formula magnetic circuits mutually selects change-over switch, the mutually single magnetic circuit output of DKM1--A contactor, the mutually single magnetic circuit output indicator of XD17-A, SKM1-A phase double magnetic circuit output contactor, XD18-A phase double magnetic circuit output indicator;
HK2-B two grades of formula magnetic circuits mutually selects change-over switch, the mutually single magnetic circuit output of DKM2-B contactor, and SKM2--B phase double magnetic circuit output contactor;
HK3-C two grades of formula magnetic circuits mutually selects change-over switch, the mutually single magnetic circuit output of DKM3-C contactor, SKM3--C phase double magnetic circuit output contactor;
C1-1, C1-2, C1-3-simulation three-phase 0.22 μ F ground capacitance, C2-1, C2-2, C2-3-simulation three-phase 0.47 μ F ground capacitance, C3-1, C3-2, C3-3-simulation three-phase 1 μ F ground capacitance; KM8-1, KM8-2, KM8-3-0.22 μ F electric capacity control contactor, KM9-1, KM9-2, KM9-3-0.47 μ F electric capacity control contactor, KM10-1, KM10-2, KM10-3-1 μ F electric capacity control contactor;
KM0-general supply contactor; The manual mutually electric current pressure regulator of TD1-A, DBA1-A phase current generation transformer, DBA2-A phase current generation transformer; HL1--A phase current generation transformer primary side current mutual inductor; HLA--A phase current generation Circuit Fault on Secondary Transformer current transformer, S1--A phase current generation Circuit Fault on Secondary Transformer current sample mutual inductor, kA1--A phase current table; The manual mutually electric current pressure regulator of TD2-B; DBB1-B phase current generation transformer; DBB2-B phase current generation transformer, HL2-B phase current generation transformer primary side current mutual inductor, HLB-B phase current generation Circuit Fault on Secondary Transformer current transformer; S2-B phase current generation Circuit Fault on Secondary Transformer current sample mutual inductor, KA2-B phase current table; The manual mutually electric current pressure regulator of TD3-C; DBC1-C phase current generation transformer; DBC2-C phase current generation transformer, HL3-C phase current generation transformer 1 primary side current mutual inductor, HLC-C phase current generation Circuit Fault on Secondary Transformer current transformer; S3-C phase current generation Circuit Fault on Secondary Transformer current sample mutual inductor, KA3-C phase current table.
Embodiment
The technical scheme of the utility model is as shown in the figure.
It is made up of voltage generation major loop, current control circuit, voltage control circuit, current occuring circuit, artificial capacitor circuit jointly.Further specify with reference to accompanying drawing.
As shown in Figure 4; Voltage generation major loop is by phase shifter YX, manually adjust contactor KM3,100V output contactor KM4,660V output contactor KM5,1140V output contactor KM6, three-phase voltage output control contactor KM7 of voltage regulator ST, voltage generation three-phase transformer YB and three-phase voltage forms.The three-phase supply inlet wire connects three-phase transformer YB primary coil through adjust contactor KM3, manual voltage regulator ST of phase shifter YX, three-phase voltage; Three-phase transformer YB secondary coil has three groups of taps; Three groups of taps connect three contactors respectively through three gears of double-shift type voltage changeover switch HK7: 100V voltage output contactor KM4,660V voltage output contactor KM5,1140V voltage output contactor KM6, form the output control circuit of output 100V, 660V, 1140V third gear three-phase voltage; Make third gear voltage adjusted in the 0-110% scope more respectively through manual voltage regulator ST.Three voltage generation major loops also comprise display circuit, and display circuit is made up of voltage transformer (VT) HY and voltage indicator gauge V5.
As shown in Figure 1, current control circuit selects circuit, three-phase current control circuit and three circuit of electric current adjustment output select circuit to form by three-phase magnetic circuit; Wherein
It is to select change-over switch HK1, two grades of formula magnetic circuits of B phase to select change-over switch HK2, C two grades of formula magnetic circuits selection change-over switch HK3 mutually by two grades of formula magnetic circuits of A phase that three-phase magnetic circuit is selected control circuit; The mutually single magnetic circuit output of A contactor DKM1, the mutually single magnetic circuit output of B contactor DKM2, the mutually single magnetic circuit output of C contactor DKM3, A phase double magnetic circuit output contactor SKM1, B phase double magnetic circuit output contactor SKM2, C phase double magnetic circuit output contactor SKM3 form.A mutually two grades of formula magnetic circuits select change-over switch HK1 the mutually single magnetic circuit output of A contactor DKM1 and A mutually double magnetic circuit export between contactor and switch, constitute the mutually single magnetic circuit output control circuit of A and A double magnetic circuit output control circuit mutually respectively; B mutually two grades of formula magnetic circuits select change-over switch HK2 the mutually single magnetic circuit output of B contactor DKM2 and B mutually double magnetic circuit export between contactor and switch, constitute the mutually single magnetic circuit output control circuit of B and B double magnetic circuit output control circuit mutually respectively; C mutually two grades of formula magnetic circuits select change-over switch HK3 the mutually single magnetic circuit output of C contactor DKM3 and C mutually double magnetic circuit export between contactor and switch, constitute the mutually single magnetic circuit output control circuit of C and C double magnetic circuit output control circuit mutually respectively.
The three-phase current control circuit is made up of A phase current control start button LQA1, B phase current control start button LQA2, C phase current control start button LQA3, A phase current control stop button LTA1, B phase current control stop button LTA2, C phase current control stop button LTA3, A phase current output contactor ZKM1, B phase current output contactor ZKM2, C phase current output contactor ZKM3, three-phase current output contactor KM2.Export contactor KM2 auxiliary contact 4 and be composed in series A phase current control circuit with A phase current control stop button LTA1, A phase current output contactor ZKM1, three-phase current again after A phase current control start button LQA1 and A phase current output contactor ZKM1 auxiliary contact 4 are parallelly connected; Export contactor KM2 auxiliary contact 4 and be composed in series B phase current control circuit with B phase current control stop button LTA2, B phase current output contactor ZKM2, three-phase current again after B phase current control start button LQA2 and B phase current output contactor ZKM2 auxiliary contact 4 are parallelly connected; Export contactor KM2 auxiliary contact 4 and be composed in series C phase current control circuit with C phase current control stop button LTA3, C phase current output contactor ZKM3, three-phase current again after C phase current control start button LQA3 and C phase current output contactor ZKM3 auxiliary contact 4 are parallelly connected;
Electric current adjustment output select circuit is made up of three-phase two grades of formula current changeover switch HK0 and three-phase current adjustment contactor KMZ; The gear of two grades of formula current changeover switch of three-phase HK0 is connected with three-phase current adjustment contactor KMZ, forms three-phase current adjustment control circuit; Another gear of two grades of formula current changeover switch of three-phase HK0 inserts three-phase current output contactor KM1, KM2, the three-phase current output time relay K T series connection of button LQA, three-phase current output stop button LTA and parallel connection through three-phase current output; Form the three-phase current output control circuit, be used for the output of three-phase supply;
The Current Control part also comprises display circuit, and display circuit is made up of pilot lamp A phase current output indicator XD13, B phase current output indicator XD14, C phase current output indicator XD15, three-phase current output indicator XD16, the mutually single magnetic circuit output indicator of A XD17, the A phase double magnetic circuit output indicator XD18 with contactor parallel connection separately.
As shown in Figure 5; Simulate relatively capacitive part by simulation three-phase 0.22 μ F ground capacitance C1-1, C1-2, C1-3; Simulation three-phase 0.47 μ F ground capacitance, simulation three-phase 1 μ F ground capacitance C3-1, C3-2, C3-3,0.22 μ F electric capacity control contactor KM8-1, KM8-2, KM8-3; 0.47 μ F electric capacity control contactor KM9-1, KM9-2, KM9-3,1 μ F electric capacity control contactor KM10-1, KM10-2, KM10-3 form.Simulation three-phase 0.22 μ F ground capacitance C1-1, C1-2, C1-3 are connected on three phase lines of three-phase supply above-mentioned electric capacity other end ground connection through 0.22 μ F electric capacity control contactor KM8-1, KM8-2, KM8-3 respectively; Simulation three-phase 0.47 μ F ground capacitance C2-1, C2-2, C2-3 are connected on three phase lines of three-phase supply above-mentioned electric capacity other end ground connection through 0.47 μ F electric capacity control contactor KM9-1, KM9-2, KM9-3; Simulation three-phase 1 μ F ground capacitance C3-1, C3-2, C3-3 are connected on three phase lines of three-phase supply above-mentioned electric capacity other end ground connection through 1 μ F electric capacity control contactor KM10-1, KM10-2, KM10-3.
As shown in Figure 2, voltage control circuit selects circuit and three-phase output control circuit to form by adjust control circuit, three-phase voltage grade of three-phase voltage; Wherein
The three-phase voltage control circuit of adjusting is made up of start button ZQA, three-phase voltage stop button ZTA and the three-phase voltage contactor KM3 that adjusts that adjusts that adjusts of one group of three-phase voltage on the guidance panel, and three-phase voltage the adjust contactor KM3 auxiliary contact 4 of start button ZQA and three-phase voltage of adjusting are composed in series the three-phase voltage circuit of adjusting with three-phase voltage stop button ZTA and the three-phase voltage contactor KM3 that adjusts that adjusts after parallelly connected again.
The three-phase voltage grade selects circuit to select change-over switch HK7 and 100V voltage output contactor KM4,660V voltage output contactor KM5,1140V voltage output contactor KM6 to form by one group of double-shift type three-phase voltage on the guidance panel; Three gears of double-shift type change-over switch connect a wherein winding tentaculum respectively, form the electric pressure of output 100V, 660V, 1140V third gear three-phase voltage and select control loop;
The three-phase output control circuit is made up of three-phase voltage output control start button QA4, three-phase voltage output control stop button TA4 and three-phase voltage output control contactor KM7; The three-phase voltage output control stop button TA4 that connects again after three-phase voltage output control start button QA4 and the three-phase voltage output control contactor KM7 parallel connection, composition three-phase voltage output circuit.
The Control of Voltage part also comprises display circuit, and display circuit is made up of the 100V output indicator XD10 parallelly connected with each contactor, 660V output indicator XD11,1140V output indicator XD12, three-phase voltage output control pilot lamp XD9, three-phase voltage output control pilot lamp XD3.
As shown in Figure 3, electric current generation part major loop is made up of with electric current generation transformer (A phase current generation transformer 1DBA1, A phase current generation transformer 2DBA2, B phase current generation transformer 1DBB1, B phase current generation transformer 2DBB2, C phase current generation transformer 1DBC1, C phase current generation transformer 2DBC2), contactor (general supply contactor KM0, three-phase current adjustment contactor KMZ, three-phase current output contactor KM1, A phase current output contactor ZKM1, B phase current output contactor ZKM2, C phase current output contactor ZKM3, the mutually single magnetic circuit electric current output of A contactor DEKM1, the mutually single magnetic circuit electric current output of B contactor DKM2, the mutually single magnetic circuit electric current output of C contactor DKM3, A phase double magnetic circuit electric current output contactor SKM1, B phase double magnetic circuit electric current output contactor SKM2, C phase double magnetic circuit electric current are exported contactor SKM3) three groups on the guidance panel manual electric current generation pressure regulators (A mutually manually electric current pressure regulator TD1, B manual electric current pressure regulator TD2, C manual electric current pressure regulator TD3 mutually mutually).The three-phase supply inlet wire is three-way through general supply contactor KM0, three-phase current output contactor KM1 and three-phase current adjustment contactor KMZ output X6, X7, X8.The X8 line connects A phase current generation transformer 1D,BA1 first primary coil through A manually electric current pressure regulator TD1 pressure regulation mutually, A phase current output contactor ZKM1 on the one hand with the X7 line; Connect A phase current generation transformer 2D,BA2 second primary coil, the two-way parallel connection through the mutually single magnetic circuit electric current output of A contactor DKM1, A phase double magnetic circuit electric current output contactor SKM1 on the other hand; A phase current generation transformer 1DBA1 secondary coil, A phase current generation transformer 2DBA2 secondary coil are composed in series the output major loop of A phase current.The X7 line connects B phase current generation transformer 1D,BB1 first primary coil through B manually electric current generation pressure regulator TD2 pressure regulation mutually, B phase current output contactor ZKM2 on the one hand with the X6 line; Connect B phase current generation transformer 2D,BB2 second primary coil, the two-way parallel connection through the mutually single magnetic circuit electric current output of B contactor DEKM2, B phase double magnetic circuit electric current output contactor SKM2 on the other hand; B phase current generation transformer 1D,BB1 first secondary coil, B phase current generation transformer 2DBB2 second subprime coil are composed in series the output major loop of B phase current.The X6 line connects C phase current generation transformer 1D,BC1 first primary coil through C manually electric current generation pressure regulator TD3 pressure regulation mutually, C phase current output contactor ZKM3 on the one hand with the X8 line; Connect C phase current generation transformer 2D,BC2 second primary coil, the two-way parallel connection through the mutually single magnetic circuit electric current output of C contactor DEKM3, C phase double magnetic circuit electric current output contactor SKM3 on the other hand; C phase current generation transformer 1D,BC1 first secondary coil, C phase current generation transformer 2DBC2 second subprime coil are composed in series the output major loop of C phase current.(the manual mutually electric current pressure regulator TD1 of A, the manual mutually electric current pressure regulator TD2 of B or the manual mutually electric current pressure regulator TD3 of C) regulates respectively each output current through three groups of manual voltage regulators.
Electric current generation part major loop also comprises display circuit, and display circuit is made up of current transformer (A phase current generation transformer 1 primary side current mutual inductor HL1, B phase current generation transformer 1 primary side current mutual inductor HL2, C phase current generation transformer 1 primary side current mutual inductor HL3, A phase current generation Circuit Fault on Secondary Transformer current transformer HLA, B phase current generation Circuit Fault on Secondary Transformer current transformer HLB, C phase current generation Circuit Fault on Secondary Transformer current transformer HLC, A phase current generation Circuit Fault on Secondary Transformer current sample mutual inductor S1, B phase current generation Circuit Fault on Secondary Transformer current sample mutual inductor S2, C phase current generation Circuit Fault on Secondary Transformer current sample mutual inductor S3) and electric current indicator gauge (A phase current table KA1, B phase current table KA2, C phase current table KA3).
Below according to description of drawings principle of work and operating process.
1, is example with output test voltage 660V voltage, the application of three voltage generation major loops is described with reference to Fig. 4.
The three-phase test transfer switch is switched to the 660V position, its inner contactor KM5 action, its normally opened contact KM5-1, KM5-2, KM5-3, and auxiliary contact KM5-4 closed, select the 660V gear; Adjust through the voltage on the guidance panel again and start the ZQA button; Contactor KM3 moves (auxiliary contact KM3-4 makes contactor KM3 self-sustaining); Three-phase supply inlet wire A1, B1, C1 insert transformer through phase shifter, three fuse RD1, RD2, RD3 manual voltage regulator ST; The entering link of adjusting; Signal lamp XD2 is bright, starts QA4 button and internal interface tentaculum KM7, makes the voltage output loop that self-sustaining auxiliary contact KM7-4 forms and export three-phase voltage through the voltage on guidance panel output at last, and signal lamp XD3, XD9 are bright; Regulate between the 0-110% of back by the corresponding 660V of manual voltage regulator ST adjustment transformer, voltage value is by digital voltage indicating gauge V5, power meter WP and the dial gauge V4 that can observe display panel between voltage transformer (VT) HY detection period at any time; Obtain required voltage, can use at terminal block M1, M2, three binding post external cables of M3.
2, with the rated current be 400A, single magnetic circuit is an example, describes the application of current control circuit with reference to Fig. 1.
At first confirm three-phase magnetic circuit selection control section; Select the gear of change-over switch HK1 to connect single magnetic circuit position two grades of formula magnetic circuits of A phase, contactor DKM1 adhesive, signal lamp XD17 is bright; Select the gear of change-over switch HK2 to connect single magnetic circuit position two grades of formula magnetic circuits of B phase; Contactor DKM2 adhesive selects the gear of change-over switch HK3 to connect single magnetic circuit position, contactor DKM3 adhesive two grades of formula magnetic circuits of C phase; When control is selected in electric current adjustment output, the gear of two grades of formula current changeover switch HK0 is connected three-phase current adjustment position, the control of A phase current, the control of B phase current, the control of C phase current can be manually carried out in contactor KMZ adhesive this moment respectively; The gear of two grades of formula current changeover switch HK0 is connected the three-phase current outgoing position; Press three-phase and insert button LQA; (auxiliary contact KM1-4 is as three-phase current output control self-sustaining for contactor KM1, KM2 and time relay KT adhesive; The KT work breaks off as three-phase current output control time-delay to be used), signal lamp XD16 is bright, and the control of A phase current, the control of B phase current, C phase current control loop drop into output automatically.Press start button LQA1 in addition, A phase current control loop is closed, its internal interface tentaculum ZKM1 adhesive, and auxiliary contact ZKM1-4 closure is carried out contactor ZKM1 self-sustaining, and XD13 is bright for A phase current control lamp; Press start button LQA2, B phase current control loop is closed, its internal interface tentaculum ZKM2 adhesive, and auxiliary contact ZKM2-4 closure is carried out contactor ZKM2 self-sustaining, and XD14 is bright for B phase current control lamp; Press start button LQA3, C phase current control loop is closed, its internal interface tentaculum ZKM3 adhesive, and auxiliary contact ZKM3-4 closure is carried out contactor ZKM3 self-sustaining, and XD15 is bright for C phase current control lamp; Press stop button TQA1, A phase current control loop breaks off, and its internal interface tentaculum ZKM1 breaks off, and auxiliary contact ZKM1-4 breaks off, and contactor ZKM1 self-sustaining was lost efficacy, and A phase current control lamp XD13 extinguishes; Press stop button LTA2, B phase current control loop breaks off, and its internal interface tentaculum ZKM2 breaks off, and auxiliary contact ZKM2-4 breaks off, and contactor ZKM2 self-sustaining was lost efficacy, and B phase current control lamp XD14 extinguishes; Press stop button LQA3, C phase current control loop breaks off, and its internal interface tentaculum ZKM3 breaks off, and auxiliary contact ZKM3-4 breaks off, and contactor ZKM3 self-sustaining was lost efficacy, and C phase current control lamp XD15 extinguishes.
3, be example to be about 0.47 μ F than long transmission line electric capacity under the simulation well, describe with reference to Fig. 5 and simulate the application of condenser network relatively.
Press start button QA7; 0.47 μ F electric capacity control loop is closed, the self-sustaining auxiliary contact KM9-4 adhesive of contactor KM9 and two contactors, and signal lamp XD7 is bright; Three-phase 0.47 μ F electric capacity is dropped into test loop; One end of each electric capacity is connected on three phase lines of three-phase supply through a button with lock respectively, and the other end ground connection of all electric capacity reaches simulation coal mine line and has Creepage capacitance over the ground.Press stop button TA7 and can manually withdraw from test, the self-sustaining auxiliary contact KM9-4 of contactor KM9 and two contactors breaks off, and signal lamp XD7 extinguishes, and can withdraw from simulation three-phase 0.47 μ F electric capacity.
4, be example with output test voltage 1140V voltage, describe the application of voltage control circuit with reference to Fig. 2.
At first press power supply three-phase test power supply double-shift type change-over switch switched to the 1140V position, make its inner contactor KM6 action, its normally opened contact KM6-1, KM6-2, KM6-3, and auxiliary contact KM6-4 closed, signal lamp XD12 is bright; Adjust through the voltage on the guidance panel again and start the ZQA button; Contactor KM3 moves (auxiliary contact KM3-4 makes contactor KM3 self-sustaining); Signal lamp XD2 is bright; Start QA4 button and internal interface tentaculum KM7 adhesive, do the voltage output control circuit formation that self-sustaining auxiliary contact KM7-4 forms through the voltage on guidance panel output at last, signal lamp XD3, XD9 are bright.When stopping output voltage, press and stop the TA4 button, break off the three-phase output control circuit, the KM7 dead electricity stops external power supply, and the voltage on the push panel is adjusted and stopped the ZTA button, breaks off the loop of adjusting, and contactor KM3 dead electricity is broken off major loop.
5, be example with output rated current 400A, describe application by current control circuit with reference to Fig. 1.
Export the electric current of 400A, at first will select single magnetic circuit, contacts of contactor DKM1, contacts of contactor DKM2, contacts of contactor DKM3 adhesive, and guarantee that contacts of contactor SKM1-2, contacts of contactor SKM2-2, contacts of contactor SKM3-2 break off; Contactor KMZ and contactor KM1 adhesive, major loop three-phase supply intersection is sent into the primary coil of manual voltage regulator TD1, manual voltage regulator TD2, manual voltage regulator TD3, after A phase current control start button LQA1 presses; Its internal interface tentaculum ZKM1 adhesive; Auxiliary contact ZKM1-4 is closed, carries out contactor ZKM1 self-sustaining, and its contact ZKM1-1 and contact ZKM1-2 are closed; The secondary coil of manual voltage regulator TD1 and transformer DBA1 primary coil constitute the loop; Observe A phase current Table A 1, KA1 voltage table V1 and power meter WP, adjust manual voltage regulator TD1 simultaneously, make that through excessive electric current 10kVA transformer DBA1 slightly (the current value gear is selected the 500A shelves by HK4-1 to A phase output current about 400A; Pass to instrument by mutual inductor S1 detection), in like manner can get B phase or the mutually big electric current of C.After control loop sends the instruction of disconnection major loop, contactor ZKM1, contactor ZKM2, contactor ZKM3, contactor KM1 or contactor ZKMZ dead electricity, their contact is broken off, and electric current generation major loop stops to send big electric current.
Claims (1)
1. an explosion-proof electric apparatus protection feature multi-function test stand is characterized in that, it by voltage generation major loop, current control circuit, artificial capacitor circuit, voltage control circuit and electric current part takes place and forms jointly; Wherein:
(1) described voltage generation major loop; Form by phase shifter, manual voltage regulator, voltage generation transformer, a double-shift type voltage changeover switch and three voltage contactors; The three-phase supply inlet wire connects the first three-phase transformer primary coil through phase shifter and manual voltage regulator; Voltage generation transformer secondary output coil has three groups of taps; Every group of tap connects a voltage contactor respectively through a gear of double-shift type voltage changeover switch, forms the output control circuit of output 100V, 660V, 1140V third gear three-phase voltage; Make third gear voltage adjusted in the 0-110% scope more respectively through manual voltage regulator; Voltage generation major loop also comprises display circuit, and display circuit is made up of voltage transformer (VT) and voltage indicator gauge;
(2) described current control circuit selects circuit, three-phase current control circuit and three circuit of electric current adjustment output select circuit to form by three-phase magnetic circuit; Wherein
Three-phase magnetic circuit selects control circuit to comprise three groups of two grades of formula magnetic circuits selection change-over switches; Each two grades of formula magnetic circuit selects two gears of change-over switch to export contactor with corresponding a single magnetic circuit output contactor and a double magnetic circuit respectively; Be connected to form three groups of two switching circuits, be respectively applied for the switching of A, B, C three-phase magnetic circuit;
The three-phase current control circuit comprises three groups of Current Control startup/stop buttons on the guidance panel; Connect an electric current output contactor on every group of Current Control startup/stop button; Every group of Current Control start button is connected in parallel on the normally closed auxiliary contact of electric current output contactor again, forms three current control loops; Three current control loops are respectively applied for the control of A, B, C three-phase current;
Electric current adjustment output select circuit is made up of two grades of formula current changeover switch and three-phase current adjustment contactor, and a gear of two grades of formula current changeover switch is connected with three-phase current adjustment contactor and formed the loop, is used for the adjustment of three-phase supply; Three-phase current output contactor is connected with three-phase current output contactor stop button again with after the parallel connection of three-phase current output time relay; Be connected with another gear of two grades of formula current changeover switch again after the series connection; Form the three-phase supply output loop, be used for the output of three-phase supply;
The Current Control part also comprises the display circuit of being made up of the Current Control pilot lamp;
(3) simulate condenser network relatively
Simulating relatively capacitive part is made up of three groups of electric capacity and three groups of electric capacity control contactors; Three groups of electric capacity are respectively 0.22 μ F/ phase, 0.47 μ F/ phase, 1.0 μ F/ phases; One end of every group of electric capacity is connected on three phase lines of three-phase supply through an electric capacity control contactor respectively, the other end ground connection of all electric capacity;
(4) voltage control circuit selects circuit and three-phase output control circuit to form by adjust control circuit, three-phase voltage grade of three-phase voltage; Wherein
The three-phase voltage control circuit of adjusting is made up of startup/stop button and the three-phase voltage contactor of adjusting of adjusting of one group of three-phase voltage on the guidance panel, and three-phase voltage is adjusted and started stop button and the three-phase voltage contactor of adjusting and connect;
The three-phase voltage grade selects circuit to select change-over switch and three electric pressures to select contactor to form by one group of double-shift type three-phase voltage on the guidance panel; Double-shift type three-phase voltage grade is selected three gears of change-over switch to connect an electric pressure respectively and is selected contactor, and three electric pressures select contactor composition output 100V, 660V, 1140V third gear electric pressure to select control loop;
The three-phase output control circuit is composed in series control circuit by three-phase voltage output control startup/stop button and three-phase voltage output control contactor;
The Control of Voltage part also comprises the display circuit of being made up of the Control of Voltage pilot lamp;
(5) electric current generation part
Electric current generation part major loop is made up of the general supply contactor on the guidance panel, three groups of A, B, the manual electric current generation of C three-phase pressure regulator, electric current generation transformer, electric current adjustment contactor, electric current output contactor, single magnetic circuit electric current output contactor and double magnetic circuit electric current output contactors; The primary coil of every phase current generation transformer of A, B, C three-phase is made up of the coil of two parallel connections; The three-phase supply inlet wire connects the electric current output contactor and the electric current adjustment contactor of A, B, C three-phase respectively through the general supply contactor; Be divided into two-way after the electric current adjustment contactor output of every phase; Manual electric current generation pressure regulator and the electric current adjustment contactor of leading up to connects electric current generation transformer first primary coil; Another Lu Jingdan magnetic circuit electric current output contactor, double magnetic circuit electric current output contactor connect electric current generation transformer second primary coil, the two-way parallel connection; The electric current generation transformer secondary output coil of every phase is established first secondary coil and second subprime coil, and first secondary coil is composed in series every electric current output loop mutually with the second subprime coil;
Electric current generation part major loop also comprises the display circuit of being made up of current transformer and electric current indicator gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011203929581U CN202330575U (en) | 2011-10-14 | 2011-10-14 | Protection feature comprehensive test bench of explosion-proof electric appliance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203929581U CN202330575U (en) | 2011-10-14 | 2011-10-14 | Protection feature comprehensive test bench of explosion-proof electric appliance |
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| CN202330575U true CN202330575U (en) | 2012-07-11 |
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Cited By (2)
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| CN102419404A (en) * | 2011-10-14 | 2012-04-18 | 山东一统电器有限公司 | Comprehensive testing bench for protection features of explosion-proof electric apparatus |
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2011
- 2011-10-14 CN CN2011203929581U patent/CN202330575U/en not_active Expired - Fee Related
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