CN208621711U - A kind of ac voltage withstanding test device - Google Patents

A kind of ac voltage withstanding test device Download PDF

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Publication number
CN208621711U
CN208621711U CN201820825723.9U CN201820825723U CN208621711U CN 208621711 U CN208621711 U CN 208621711U CN 201820825723 U CN201820825723 U CN 201820825723U CN 208621711 U CN208621711 U CN 208621711U
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unit
voltage
electrically connected
relay
test
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余建文
陈麒安
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NANING GAOZHAO ELECTRICAL APPLIANCE Co Ltd
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NANING GAOZHAO ELECTRICAL APPLIANCE Co Ltd
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Abstract

The utility model discloses a kind of ac voltage withstanding test devices, including over-current protecting unit, pressure regulation unit, high voltage step-up unit, controlling test unit, measure display unit, tested terminals, partial pressure unit and testing inspection unit, over-current protecting unit is connected on single phase ac alternating current bus, the input terminal of the output end of over-current protecting unit and the pressure regulation unit is electrically connected, the output end of pressure regulation unit and the input terminal of high voltage step-up unit are electrically connected, the control terminal of controlling test unit is electrically connected with pressure regulation unit and high voltage step-up unit respectively, it measures display unit and high voltage step-up unit is electrically connected, the high voltage step-up unit is electrically connected by partial pressure unit and tested terminals, testing inspection unit is electrically connected with over-current protecting unit and partial pressure unit respectively, the test device of the utility model can effectively improve disconnection power supply Timeliness, ensure that the degree of injury of electrical equipment to greatest extent, improve the operational safety of test.

Description

A kind of ac voltage withstanding test device
Technical field
The utility model belongs to ac voltage withstanding the field of test technology more particularly to a kind of ac voltage withstanding test device.
Background technique
All electric products factory, installation, using operation and repair and maintenance life cycle management in, will carry out Electrical safety performance parametric test and test are to reflect electronic product and the important parameter of equipment safety performance, electrical safety master Wanting test index includes AC/DC pressure resistance, insulation resistance, leakage current, ground resistance etc., will carry out ac voltage withstanding or insulation Resistance test test, ac voltage withstanding or insulation resistance test test are to examine one of the important indicator of equipment electrical safety performance, Ac voltage withstanding or insulation resistance test test are to apply certain high pressure to subject electric product and keep certain time, to verify quilt Examination electric product insulation can bear the ability of certain high pressure, to guarantee the use peace for being tested electric product.And ac voltage withstanding or Insulation resistance test tests the relevant test instrumentation of all each freedom and device to complete.At present using it is more be mesa structure Individual event test index test equipment, be not able to satisfy user need comprehensive multi-index test demand.And pressure resistance examination at the scene When testing work, since individual work environment is not easy to control, non-operating personnel easily occurs and is strayed into testing ground, will generate can not estimate The serious consequence of amount.Moreover, when carrying out pressure resistance to testing equipment, due to the defect of measured device or the testability of testing equipment The defect of energy itself, is easily likely to occur breakdown, if operator cannot disconnect power supply in time, can cause to testing equipment Excessive pressure damages not can guarantee the safety of personnel and testing equipment.At the same time, the measuring accuracy of current pressure tester is not Height directly affects the quality of electric equipment products, so that the need of the electrical safety performance test job developed at present cannot be fully met It wants.Therefore research, which meets the sophistication of newest international standard and the pressure-resistant test system with more preferable performance indicator, has Significance.
Utility model content
The purpose of this utility model is to provide a kind of ac voltage withstanding test device, the utility model is adjusted by slowly adjusting It presses the supply voltage value of element loop to be simultaneously formed simultaneously a self-holding circuit, while monitoring the voltage of pressure-control circuit and by pressure regulation Voltage afterwards boosts, and completes to test measured device pressure resistance breakdown test, can not only effectively improve test safety, may be used also It is effectively protected with guarantee test personnel safety and test device, when encountering the breakdown electric discharge of testing equipment or short circuit, energy The timeliness for disconnecting power supply is effectively improved, the degree of injury of electrical equipment is ensure that greatest extent, improves the behaviour of pressure test Make safety, in order to solve the above technical problems, the utility model uses following technical scheme:
According to the one aspect of this hair utility model, a kind of ac voltage withstanding test device is provided, it is characterised in that: described Ac voltage withstanding test device includes over-current protecting unit, pressure regulation unit, high voltage step-up unit, controlling test unit, measurement display Unit, tested terminals, partial pressure unit and testing inspection unit, the incoming end of the over-current protecting unit are connected to single phase ac On alternating current bus, the input terminal of the output end of the over-current protecting unit and the pressure regulation unit is electrically connected, the pressure regulation unit Output end and the high voltage step-up unit primary input terminal be electrically connected, the control terminal of the controlling test unit respectively with The control terminal of the pressure regulation unit and the control terminal electrical connection of high voltage step-up unit, the measurement display unit and high voltage step-up The primary input terminal of unit is electrically connected, and the secondary output end of the high voltage step-up unit passes through partial pressure unit and tested terminals electricity Gas connection, the test side of the testing inspection unit are electrically connected with the over-current protecting unit and partial pressure unit respectively.
Preferably, the pressure regulation unit includes single-phase self-coupling pressure regulator, limit switch and pressure regulation display, the test control Unit processed includes contactor, normally closed push button switch, normally open push button switch, the first intermediate relay, the second intermediate relay, voltage Relay, electric current relay, the time relay, the first indicator light, the second indicator light, third indicator light and the 4th indicator light, institute The control terminal for stating over-current protecting unit is connect with the first control output end of the testing inspection unit, the over-current protecting unit Cathode output end respectively with the first detection input of the testing inspection unit, the master control contact of contactor input terminal, One end of normally closed push button switch, one end of the second normally-closed contact of contactor, one end of the third normally opened contact of contactor, electric current One end of the normally opened contact of relay, one end of the normally opened contact of the first intermediate relay, voltage relay normally opened contact One end, the second intermediate relay normally opened contact one end electrical connection, two output ends of the master control contact of the contactor It is electrical with the second tap of the first tap of single-phase self-coupling pressure regulator primary coil and single-phase self-coupling pressure regulator primary coil respectively Connection, the first tap of the single-phase self-coupling pressure regulator primary coil are connected to ground by pressure regulation display, the single-phase self-coupling The tap changer of pressure regulator is electrically connected with one end of voltage relay and one end of electric current relay respectively, the electric current relay The other end and first primary input terminal by high voltage step-up unit be electrically connected, the measurement display unit and high pressure Second primary input terminal of boosting unit is electrically connected, and the secondary output end of the high voltage step-up unit passes through partial pressure unit and quilt Terminals electrical connection is surveyed, the output end of the partial pressure unit and the second detection input of the testing inspection unit electrically connect It connects;The other end of the normally closed push button switch the first normally opened contact with one end of the normally open push button switch and contactor respectively One end electrical connection, the other end of the normally open push button switch by limit switch respectively with the first normally opened contact of contactor The other end, the electrical connection of contactor one end, the other end of the contactor pass sequentially through the normally-closed contact of the first intermediate relay It is electrically connected with the normally-closed contact of the time relay and the cathode output end of the over-current protecting unit;
Second normally-closed contact of the contactor passes through the cathode output end of the first indicator light and the over-current protecting unit Electrical connection;The third normally opened contact of contactor is electrical by the cathode output end of the second indicator light and the over-current protecting unit Connection;The other end of the normally opened contact of the other end of the normally opened contact of the electric current relay and the first intermediate relay electrically connects Be electrically connected respectively with one end of first intermediate relay and one end of third indicator light again after connecing, among described first after The cathode output end of the other end of electric appliance and the other end of third indicator light and the over-current protecting unit is electrically connected;The electricity Distinguish again after the other end electrical connection of the normally opened contact of the other end of the normally opened contact of potential relay and the second intermediate relay It is electrically connected with one end of one end of second intermediate relay, one end of the time relay and the 4th indicator light, described the The other end and the over-current protecting unit of the other end of two intermediate relays, the other end of the time relay and the 4th indicator light Cathode output end electrical connection.
Above scheme is it is further preferred that the high voltage step-up unit includes the high pressure liter with multiple primary coil taps Pressure transformer, the testing inspection unit include voltage transformer and central controller and connect respectively with central controller The other end of alarm indication unit and keyboard, the electric current relay passes through alternating current ammeter and the H.V. step up transformer One end of first primary coil is connected in series, the other end of the first primary coil of the H.V. step up transformer and it is single-phase from Second tap of coupling pressure regulator is electrically connected, and the both ends of the second primary coil of the H.V. step up transformer are aobvious with measurement respectively Show the both ends point connection of unit;First tap of the secondary coil of H.V. step up transformer passes through partial pressure unit and tested terminals It is connected to ground, the second tap of the secondary coil of the H.V. step up transformer is connected to ground, the anode of the over-current protecting unit Output end is connect by voltage transformer with the first detection input of the central controller, the output end of the partial pressure unit It is electrically connected with the second detection input of the central controller.
Above scheme is it is further preferred that the partial pressure unit includes resistance R1, resistance R2, inductance L0, capacitor Cx and electricity Hold C0, the first tap of the secondary loops of the H.V. step up transformer pass sequentially through resistance R1 and inductance L0 respectively with capacitor Cx One end connected with one end of resistance R2, the other end of the resistance R2 is connect with one end of tested terminals, and capacitor Cx's is another One end is electrically connected with the second detection input of one end of capacitor C0 and central controller respectively;The H.V. step up transformer The second tap of the second primary coil, the other end of capacitor C0 and tested terminals the other end be connected to ground.
Above scheme it is further preferred that the secondary coil of the H.V. step up transformer at least by two the first high voltage windings Group and the second high-voltage winding are connected in series, and pass through first contactor and the between first high-voltage winding and the second high-voltage winding Two contactors are electrically connected with the partial pressure unit again after switching over, the control terminal and second of first disconnecting switch The control terminal of disconnecting switch is connect with the second control output end of the central controller respectively.
Above scheme is it is further preferred that the over-current protecting unit includes first fuse, second fuse and power supply Master switch, the first fuse, second fuse and battery main switch are sequentially connected in series on single phase ac alternating current bus, The control terminal of the battery main switch is connect with the first control output end of the central controller.
Above scheme it is further preferred that it is described include pressure regulation display include capacitor C1 and the 5th indicator light, the list First tap of phase automatic coupling voltage regulator primary coil passes sequentially through capacitor C1 and the 5th indicator light is connected to ground.
Above scheme it is further preferred that the automatic coupling voltage regulator output voltage within the time of 12s~25s, according to 10V-20V, which is slowly adjusted, to boost to given voltage and starts to test, within a preset time by the voltage of measured device be maintained at 55s~ Pressure-resistant breakdown test test is carried out in the time range of 90s.
Above scheme is it is further preferred that the step judges when the difference on the frequency is zero and whether judges the phase difference When more than or less than 5 degree, carried out using the voltage of feedback voltage as pressure-resistant breakdown test test in conclusion since this is practical new Type uses above-mentioned technical proposal, and the utility model has following technical effect that
(1), the utility model is a kind of pressure resistant testing device with overcurrent protection, is returned by slowly adjusting pressure regulation unit The supply voltage value on road is simultaneously formed simultaneously a self-holding circuit, at the same monitor pressure regulation element loop voltage and will be after pressure regulation Voltage, which boosts, carries out pressure-resistant breakdown test test to measured device, can not only effectively improve test safety, when there is boosting Voltage value when being added on test product much larger than the numerical value of test voltage, self-sustaining movement in circuit makes test device and testing crew Safety is effectively protected, and when encountering the breakdown electric discharge of testing equipment or short circuit, can effectively improve the timeliness for disconnecting power supply, The degree of injury that can ensure that electrical equipment to greatest extent, improves the operational safety of pressure test.
(2), the utility model passes through the cooperation of pressure regulation and the time relay, after reaching test period, the time relay Can be delayed disconnection, guarantee that supply voltage is disconnected, can effectively the Control experiment time so that measured device reaches regulation in pressure resistance After time can rapid step-down discharge, automatic time delay protection test device may be implemented, reduce the damage of electrical equipment.
(3), it can prevent during the test according to the ac voltage withstanding test of the utility model due to the short circuit of measured object or mistake To the damage of ac voltage withstanding tester caused by stream, and voltage detecting and control output can be accurately carried out, also guarantee examination Test the safety of operator.
Detailed description of the invention
Fig. 1 is a kind of functional block diagram of ac voltage withstanding test device of the utility model;
Fig. 2 is a kind of working principle diagram of ac voltage withstanding test device of the utility model;
Fig. 3 is that a kind of boosting multiplying power of the H.V. step up transformer of ac voltage withstanding test device of the utility model adjusts original Reason figure;
In attached drawing, 1- over-current protecting unit, 2- pressure regulation unit, 3- high voltage step-up unit, 4- controlling test unit, 5- measurement Display unit, 6- are tested terminals, 7- partial pressure unit, 8- testing inspection unit, 80- central controller, 81- alarm indication list Member, 82- keyboard.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, referring to the drawings and enumerate excellent Embodiment is selected, the utility model is further described.However, it is necessary to illustrate, many details listed in specification It is specific even without these just for the sake of making reader have a thorough explanation to the one or more aspects of the utility model Details also may be implemented the utility model these aspect.
As depicted in figs. 1 and 2, a kind of ac voltage withstanding test device according to the present utility model, the ac voltage withstanding test Device includes over-current protecting unit 1, pressure regulation unit 2, high voltage step-up unit 3, controlling test unit 4, measurement display unit 5, quilt It surveys terminals 6, partial pressure unit 7 and testing inspection unit 8, the incoming end of the over-current protecting unit 1 and is connected to single phase ac city On goddess of lightning's line, the input terminal of the output end of the over-current protecting unit 1 and the pressure regulation unit 2 is electrically connected, the pressure regulation unit 2 Output end and the primary input terminal of the high voltage step-up unit 3 be electrically connected, the control terminal of the controlling test unit 4 difference It is electrically connected with the control terminal of the pressure regulation unit 2 and the control terminal of high voltage step-up unit 3, the measurement display unit 5 and height The primary input terminal electrical connection of boosting unit 3 is pressed, the secondary output end of the high voltage step-up unit 3 passes through partial pressure unit 7 and quilt Survey terminals 6 be electrically connected, the test side of the testing inspection unit 8 respectively with the over-current protecting unit 1 and partial pressure unit 7 Electrical connection.The pressure regulation unit 2 includes single-phase self-coupling pressure regulator 1TC, limit switch S1 and pressure regulation display, the test control Unit 4 processed includes contactor 1KM0, normally closed push button switch 1SB1, normally open push button switch 1SB2, the first intermediate relay 1K, second Intermediate relay 2K, voltage relay 1KV, electric current relay KA, time relay KT, the first indicator light 1HG, the second indicator light 1HR, third indicator light 1HY and the 4th indicator light 2HY, the control terminal of the over-current protecting unit 1 and the testing inspection unit 8 The first control output end connection, the cathode output end of the over-current protecting unit 1 respectively with the testing inspection unit 8 First detection input, the input terminal of the master control contact 1KM of contactor 1KM0, one end of normally closed push button switch 1SB1, contactor One end of the second normally-closed contact 1KM-2 of 1KM0, one end of the third normally opened contact 1KM-3 of contactor 1KM0, electric current relay One end of the normally opened contact 1KA-1 of 1KA, one end of the normally opened contact 1K-2 of the first intermediate relay 1K, voltage relay 1KV One end of normally opened contact KV-1, the second intermediate relay 2K normally opened contact 2K-1 one end electrical connection, the contactor Two output ends of the master control contact 1KM of 1KM0 respectively with the first tap of single-phase self-coupling pressure regulator 1TC primary coil and single-phase Second tap of automatic coupling voltage regulator 1TC primary coil is electrically connected, and the first of the single-phase self-coupling pressure regulator 1TC primary coil is taken out Head is connected to ground by pressure regulation display, and the tap changer of the single-phase self-coupling pressure regulator 1TC is respectively with voltage relay 1KV's One end and the electrical connection of one end of electric current relay 1KA, the other end of electric current relay 1KA pass through high voltage step-up with described First primary input terminal of unit 3 is electrically connected, the second primary input of the measurement display unit 5 and high voltage step-up unit 3 The secondary output end of end electrical connection, the high voltage step-up unit 3 is electrically connected by partial pressure unit 7 and tested terminals 6, institute Second detection input of the output end and the testing inspection unit 8 of stating partial pressure unit 7 is electrically connected;The normally closed button is opened Close the other end the first normally opened contact 1KM-1 with one end of the normally open push button switch 1SB2 and contactor 1KM0 respectively of 1SB1 One end electrical connection, the other end of normally open push button switch 1SB2 by limit switch S1 respectively with contactor 1KM0 first The other end of normally opened contact 1KM-1, the electrical connection of the one end contactor 1KM0, the other end of the contactor 1KM0 pass sequentially through The normally-closed contact KT-1 and the over-current protecting unit of the normally-closed contact 1K-1 and time relay KT of first intermediate relay 1K 1 cathode output end electrical connection;
The high voltage step-up unit 3 includes the H.V. step up transformer 1TV with multiple primary coil taps, the test Detection unit 8 includes voltage transformer pt and central controller 80 and the alarm indication list connecting respectively with central controller 80 The other end of member 81 and keyboard 82, the electric current relay 1KA passes through alternating current ammeter 1PA and the H.V. step up transformer One end of the first primary coil of 1TV is connected in series, the other end of the first primary coil of H.V. step up transformer 1TV It is electrically connected with the second tap of single-phase self-coupling pressure regulator 1TC, the second primary coil of the H.V. step up transformer 1TV Both ends point of the both ends respectively with measurement display unit 5 connect;First tap of the secondary coil of the H.V. step up transformer 1TV Be connected to ground by partial pressure unit 7 and tested terminals 6, the second tap of the secondary coil of H.V. step up transformer 1TV with Ground connection, the first inspection that the cathode output end of the over-current protecting unit 1 passes through voltage transformer pt and the central controller Input terminal connection is surveyed, the output end of the partial pressure unit 7 and the second detection input of the central controller are electrically connected;Institute Stating tested terminals 6 is binding post (it is metallic conductor that it is internal, is insulator outside metallic conductor), and the partial pressure unit 7 is wrapped Resistance R1, resistance R2, inductance L0, capacitor Cx and capacitor C0 are included, the first of the secondary loops of the H.V. step up transformer 1TV is taken out Head passes sequentially through resistance R1 and inductance L0 is connect with one end of one end of capacitor Cx and resistance R2 respectively, and the resistance R2's is another One end is connect with the one end of tested terminals (6), the other end of capacitor Cx respectively with one end of capacitor C0 and central controller 80 The second detection input electrical connection;Second tap of the second primary coil of the H.V. step up transformer 1TV, capacitor C0 The other end and the other ends of tested terminals 6 be connected to ground, the second primary coil output of the H.V. step up transformer 1TV Voltage by resistance R1, inductance L0, capacitor Cx, capacitor C0 and resistance R2 current limliting, partial pressure level-one filter over the ground elimination electric current mistake The voltage of output is sent into tested terminals 6 and provides the voltage source of voltage-withstand test for measured device, passes through inductance L0 by big and interference It reduces the generation of resonance and is divided by capacitor Cx and capacitor C0, effectively can carry out inductance in breakdown test test Compensation and capacitance compensation, make that the test voltage on measured device is identical as the frequency of voltage on alternating current bus, phase is protected substantially It is more steady to hold the voltage exported after transformation of boosting during unanimously making breakdown test, while also avoiding changing high pressure liter When the boosting multiplying power of pressure transformer 1TV, the voltage error as caused by phase difference or difference on the frequency can be effectively reduced, when tested terminals When short circuit occur in 6 (output ends) or measured device, failure damage ratio can be effectively inhibited.
In the present invention, as depicted in figs. 1 and 2, the second normally-closed contact 1KM-2 of the contactor 1KM0 passes through the The cathode output end of one indicator light 1HG and the over-current protecting unit 1 is electrically connected;The third normally opened contact of contactor 1KM0 1KM-3 is electrically connected by the cathode output end of the second indicator light 1HR and the over-current protecting unit 1;The electric current relay After the other end electrical connection of the normally opened contact 1K-2 of the other end of the normally opened contact 1KA-1 of 1KA and the first intermediate relay 1K It is electrically connected respectively with one end of the first intermediate relay 1K and one end of third indicator light 1HY again, among described first The cathode output end of the other end and the over-current protecting unit 1 of the other end and third indicator light 1HY of relay 1K electrically connects It connects;The normally opened contact 2K-1's of the other end of the normally opened contact KV-1 of the voltage relay 1KV and the second intermediate relay 2K It is indicated respectively with one end of second intermediate relay, one end of time relay KT and the 4th again after other end electrical connection One end of lamp 2HY is electrically connected, and the other end of the second intermediate relay 2K, the other end of time relay KT and the 4th refer to The cathode output end of the other end and the over-current protecting unit 1 that show lamp 2HY is electrically connected.
In the present invention, referring to figs. 1 and 2, the high voltage step-up unit 3 includes having multiple primary coils The other end of the H.V. step up transformer 1TV, the electric current relay 1KA of tap pass through alternating current ammeter 1PA and the high pressure One end of first primary coil of boosting unit 3 is connected in series, the first primary coil of the high voltage step-up unit 3 it is another End and the second tap of single-phase self-coupling pressure regulator 1TC are electrically connected, the second primary coil of the H.V. step up transformer 1TV Both ends point of the both ends respectively with measurement display unit 5 connect;First tap of the secondary coil of H.V. step up transformer 1TV passes through Tested terminals 6 are connected to ground, and the second tap of the secondary coil of H.V. step up transformer 1TV is connected to ground;The overcurrent Protection location 1 includes first fuse F1, second fuse F2 and battery main switch 1QF, the first fuse F1, second molten Disconnected device F2 and battery main switch 1QF is sequentially connected in series on single phase ac alternating current bus, the control of the battery main switch 1QF End is connect with the first control output end of the central controller 80, and the central controller 80 is PLC controller or use ARM Series Controller;It is described include pressure regulation display include capacitor C1 and the 5th indicator light L1, the single-phase self-coupling pressure regulator First tap of 1TC primary coil passes sequentially through capacitor C1 and the 5th indicator light L1 is connected to ground.The H.V. step up transformer The nominal parameter of 1TV is 3KVA 0-50KV 250/1V, and the nominal parameter of the phase automatic coupling voltage regulator 1TC is 2KVA 0-250V.
A kind of ac voltage withstanding test device progress pressure test test provided by the utility model is utilized combined with Figure 1 and Figure 2, When, measured device is set up using insulating tape first, by one end of insulating tape and measured device with clamping piece (binding clip) It is fixed, then the other end of insulating tape and measured device is connected to ground by the other end of clamping piece, then adjusting clamping piece makes Measured device is simultaneously coated tested terminals 6 compact, and that measured device is compactly connected to by the tensioning state of insulating tape On;Secondly, setting the default testing time, the output voltage of single-phase self-coupling pressure regulator 1TC is adjusted to given voltage and starts to test, Within a preset time, the voltage of measured device is maintained in preset time range and carries out pressure-resistant breakdown test;Off-test Afterwards, it disconnects mains supply and removes measured device from tested terminals 6, after tested terminals 6 to be carried out to short circuit ground connection again Another measured device is changed, continues to test;Specific step is as follows for the ac voltage withstanding test:
Step 1: adjusting single-phase self-coupling pressure regulator 1TC and be zeroed and be closed limit switch S1, be then closed battery main switch Mains supply is input to single-phase self-coupling pressure regulator 1TC primary coil by 1QF, is obtained by voltage transformer pt and is closed battery main switch The voltage of 1QF output, and using the voltage of voltage transformer acquisition output as reference voltage Uref
Step 2: pressing normally open push button switch 1SB2 closure, the master control contact 1KM of contactor is activated actuation, contactor The first normally opened contact 3KM-1 of 1KM0 is also activated actuation and completes self-locking, the second normally opened contact of contactor 1KM0 simultaneously 3KM-2 closure, the shinny expression experimental test of the second indicator light HR start, and single-phase self-coupling pressure regulator 1TC is powered at this time, and leads to simultaneously It crosses pressure regulation display, alternating current ammeter 1PA and measurement display unit 5 and detects energization situation, measurement display unit 5 has measured electricity Pressure, then single-phase self-coupling pressure regulator 1TC is not zeroed, if measurement display unit 5 measures no-voltage, measured device is compactly connected Connect tested terminals 6 on, it is described measurement display unit 5 be H.V. step up transformer 1TV the second primary coil one end Alternating voltage 1PV between X11 and other end X12 monitors voltage value when pressure breakdown test test with alternating voltage 1PV;
Step 3: setting the default testing time as 45s~90s, then adjust the electricity that single-phase self-coupling pressure regulator 1TC exports it It is pressed between 0-250V, is then boosted by high voltage step-up unit 3, current limliting and filtered, access tested terminals 6 First end M0, high voltage step-up unit 3 boost after voltage by be tested terminals 6 first end M0 be feeding measured device one End, the other end of measured device are connected to ground by being tested the second end M1 of terminals 6;The voltage of automatic coupling voltage regulator 1TC output Within the time of 10s~25s, is slowly adjusted according to the variable quantity of 10V-20V and boost to given voltage and (for example boost to 0KV ~50KV, preferably 10KV or 40KV) start to test, by the voltage of measured device be maintained in the time range of 45s~90s into Row pressure resistance breakdown test test, and the voltage of acquisition partial pressure unit output in real time, and be feedback with the voltage of partial pressure unit output Voltage Uf;
Step 4: difference on the frequency and phase difference between comparative analysis reference voltage Uref and feedback voltage Uf judge the frequency Rate difference and judge whether the phase difference value meets the requirements, be further continued for carrying out boosting adjusting, when the difference on the frequency is zero and Judge whether the phase difference is greater than -5 degree or (voltage phase difference both i.e. is not more than 5 degree in advance, lags small when less than 5 degree In be equal to 5 degree), central controller 80 issue display alarm command to show alarm unit (LCD is shown and alarm) prompt can It to carry out breakdown test operation, is carried out at this time using the voltage of feedback voltage as pressure-resistant breakdown test test, to make tested device Part carries out pressure-resistant breakdown test test within the preset time and under feedback voltage;When reference voltage and feedback voltage meet When stating conditions dictate, change to the boosting multiplying power for adjusting H.V. step up transformer 1TV, and using the voltage after multiplying power of boosting as defeated Voltage continues above-mentioned experiment out;In specific experiment operation, as shown in figure 3, the secondary coil of the H.V. step up transformer 1TV At least it is connected in series by two the first high-voltage winding Tx0 and the second high-voltage winding Tx1, the first high-voltage winding Tx0 and second After being switched between high-voltage winding Tx1 by the first disconnecting switch 2KM and the second disconnecting switch 3KM again with the partial pressure unit 7 resistance R1 is electrically connected, i.e., one end of the first high-voltage winding Tx0 and one end of the second high-voltage winding Tx1 are respectively with One end of two disconnecting switch 3KM connects, the other end of the first high-voltage winding Tx0 by the first disconnecting switch 2KM respectively with The other end of the second disconnecting switch 3KM is connected with one end of resistance R1, the control terminal of the first disconnecting switch 2KM with second every The control terminal for leaving pass 2KM is connect with the control output end of the central controller respectively, under the triggering of keyboard 82, in Centre controller 80, which issues on-off control command, makes that the boosting multiplying power of H.V. step up transformer 1TV is adjusted, and controls in center Device control under switch over, it can be achieved that output voltage range select, conveniently realize H.V. step up transformer 1TV automatic constant current or Constant voltage output control;
Step 5: the electric current of pressure-resistant breakdown test test is monitored by alternating current ammeter 1PA and the measurement display of display unit 5 And voltage value, reach test pressure voltage for judging whether, if reaching test pressure voltage, measured device is not breakdown, then stops Only boosting is adjusted, and indicates that measured device is qualified, at this time the normally opened contact KV-1 of voltage relay 1KV be attracted, among second after Self-locking and time relay KT normally-closed contact KT-1 is attracted by the normally opened contact 2K-1 of electric appliance 2K starts timing, the first instruction Lamp 1HG, the second indicator light 1HR, third indicator light 1HY and the 4th indicator light 2HY are shinny to indicate that corresponding relay contact closes Operation is closed, when reaching the time of breakdown test test request, the normally-closed contact KT-1 of time delay relay KT is opened, contact The master control contact 1KM power loss of device 1KM0, the power supply of single-phase self-coupling pressure regulator 1TC are disconnected, and off-test is filled to measured device It is removed from tested terminals 6 after dividing electric discharge;In pressure test test process, if the dielectric strength of measured device is inadequate Or it is breakdown, the secondary leakage current of H.V. step up transformer 1TV is necessarily excessive, is serially connected with H.V. step up transformer 1TV The electric current relay 1KA of primary coil also follows overcurrent and acts, and the normally opened contact 1KA-1 of electric current relay 1KA connects first The normally opened contact 1K1-2, the normally-closed contact 1K-1 of the first intermediate relay 1K of intermediate relay 1K disconnects rapidly contactor 1KM0 Circuit, test at once stop, at this point, central controller outputs control signals to the control terminal of battery main switch 1QF, make power supply Master switch 1QF disconnection is isolated with alternating current bus, and central controller output control signal puts third disconnecting switch 4KM closure Electricity effectively improves the timeliness for disconnecting power supply, to greatest extent to make testing crew and measured device that effective protection can be obtained The degree of injury that ensure that pressure resistant testing device, improve the operational safety of pressure test, the utility model measured device is Vacuum circuit breaker, high voltage load switch, high-voltage isulation terminal, high-tension cable, high-tension current (voltage) mutual inductor.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without departing from the principle of this utility model, can also make several improvements and retouch, these improve and Retouching also should be regarded as the protection scope of the utility model.

Claims (5)

1. a kind of ac voltage withstanding test device, it is characterised in that: the ac voltage withstanding test device includes over-current protecting unit (1), pressure regulation unit (2), high voltage step-up unit (3), controlling test unit (4), measurement display unit (5), tested terminals (6), the incoming end of partial pressure unit (7) and testing inspection unit (8), the over-current protecting unit (1) is connected to single phase ac city On goddess of lightning's line, the input terminal of the output end of the over-current protecting unit (1) and the pressure regulation unit (2) is electrically connected, the pressure regulation The output end of unit (2) and the primary input terminal of the high voltage step-up unit (3) are electrically connected, the controlling test unit (4) Control terminal be electrically connected respectively with the control terminal of the pressure regulation unit (2) and the control terminal of high voltage step-up unit (3), the survey The primary input terminal for measuring display unit (5) and high voltage step-up unit (3) is electrically connected, and the secondary of the high voltage step-up unit (3) is defeated Outlet is electrically connected by partial pressure unit (7) and tested terminals (6), the test side of the testing inspection unit (8) respectively with The over-current protecting unit (1) and partial pressure unit (7) electrical connection.
2. a kind of ac voltage withstanding test device according to claim 1, it is characterised in that: the pressure regulation unit (2) includes Single-phase self-coupling pressure regulator (1TC), limit switch (S1) and pressure regulation display, the controlling test unit (4) includes contactor (1KM0), normally closed push button switch (1SB1, normally open push button switch (1SB2), the first intermediate relay (1K), the second intermediate relay (2K), voltage relay (1KV), electric current relay (1KA), the time relay (KT), the first indicator light (1HG), the second instruction Lamp (1HR), third indicator light (1HY) and the 4th indicator light (2HY), the control terminal and the examination of the over-current protecting unit (1) Test detection unit (8) the first control output end connection, the cathode output end of the over-current protecting unit (1) respectively with the examination Test input terminal, the normally closed push button switch of the first detection input of detection unit, the master control contact (1KM) of contactor (1KM0) The normally opened touching of third of the one end of (1SB1), one end of the second normally-closed contact (1KM-2) of contactor (1KM0), contactor (1KM0) One end of point (1KM-3), one end of the normally opened contact (1KA-1) of electric current relay (1KA), the first intermediate relay (1K) it is normal Open one end of contact (1K-2), one end of the normally opened contact (KV-1) of voltage relay (1KV), the second intermediate relay (2K) One end of normally opened contact (2K-1) is electrically connected, two output ends difference of the master control contact (1KM) of the contactor (1KM0) It is taken out with first tap of single-phase self-coupling pressure regulator (1TC) primary coil and the second of single-phase self-coupling pressure regulator (1TC) primary coil Head electrical connection, the first tap of single-phase self-coupling pressure regulator (1TC) primary coil are connected to ground by pressure regulation display, institute State the tap changer of single-phase self-coupling pressure regulator (1TC) respectively with one end of voltage relay (1KV) and electric current relay (1KA) One end electrical connection, the other end of the electric current relay (1KA) and the first primary input by high voltage step-up unit (3) End electrical connection, the second primary input terminal electrical connection of measurement display unit (5) and high voltage step-up unit (3) are described The secondary output end of high voltage step-up unit (3) is electrically connected by partial pressure unit (7) and tested terminals (6), and the partial pressure is single The output end of first (7) and the second detection input of the testing inspection unit (8) are electrically connected;The normally closed push button switch The other end of (1SB1) the first normally opened contact with one end of the normally open push button switch (1SB2) and contactor (1KM0) respectively The one end of (1KM-1) is electrically connected, the other end of the normally open push button switch (1SB2) by limit switch (S1) respectively with contact The other end of the first normally opened contact (1KM-1) of device (1KM0), the electrical connection of contactor one end (1KM0), the contactor The other end of (1KM0) pass sequentially through the first intermediate relay (1K) normally-closed contact (1K-1) and the time relay (KT) it is normal Closed contact (KT-1) and the cathode output end of the over-current protecting unit (1) are electrically connected;
The second normally-closed contact (1KM-2) of the contactor (1KM0) passes through the first indicator light (1HG) and the overcurrent protection list The cathode output end electrical connection of first (1);The third normally opened contact (1KM-3) of contactor (1KM0) passes through the second indicator light The cathode output end of (1HR) and the over-current protecting unit (1) is electrically connected;The normally opened contact of the electric current relay (1KA) The normally opened contact (1K-2) of the other end of (1KA-1) and the first intermediate relay (1K) the other end electrical connection after again respectively with One end of first intermediate relay (1K) and one end electrical connection of third indicator light (1HY), the first intermediate relay The cathode output end of the other end and the over-current protecting unit (1) of the other end and third indicator light (1HY) of device (1K) is electrical Connection;The other end of the normally opened contact KV-1 of the voltage relay (1KV) and the normally opened contact of the second intermediate relay (2K) (2K-1) the other end electrical connection after again respectively with one end of second intermediate relay, time relay KT one end and One end of 4th indicator light (2HY) is electrically connected, the other end of second intermediate relay (2K), the time relay (KT) The other end of the other end and the 4th indicator light (2HY) and the cathode output end of the over-current protecting unit (1) are electrically connected.
3. a kind of ac voltage withstanding test device according to claim 2, it is characterised in that: the high voltage step-up unit (3) Including the H.V. step up transformer (1TV) with multiple primary coil taps, the testing inspection unit (8) includes mutual induction of voltage Device (PT) and central controller (80) and the alarm indication unit (81) and keyboard being connect respectively with central controller (80) (82), the other end of the electric current relay (1KA) passes through alternating current ammeter (1PA) and the H.V. step up transformer (1TV) One end of the first primary coil be connected in series, the other end of the first primary coil of the H.V. step up transformer (1TV) It is electrically connected with the second tap of single-phase self-coupling pressure regulator (1TC), the second primary coil of the H.V. step up transformer (1TV) Both ends respectively with the connection of the both ends point of measurement display unit (5);The of the secondary coil of the H.V. step up transformer (1TV) One tap is connected to ground by partial pressure unit (7) and tested terminals (6), the secondary coil of the H.V. step up transformer (1TV) The second tap be connected to ground, the cathode output end of the over-current protecting unit (1) by voltage transformer (PT) and it is described in Entreat the first detection input connection of controller, the second inspection of the output end and the central controller of the partial pressure unit (7) Survey input terminal electrical connection.
4. a kind of ac voltage withstanding test device according to claim 3, it is characterised in that: the partial pressure unit (7) includes Resistance R1, resistance R2, inductance L0, capacitor Cx and capacitor C0, the first tap of the secondary loops of the H.V. step up transformer (1TV) It passes sequentially through resistance R1 and inductance L0 is connect with one end of one end of capacitor Cx and resistance R2 respectively, the other end of the resistance R2 Connect with one end of tested terminals (6), the other end of capacitor Cx respectively with one end of capacitor C0 and central controller second Detection input electrical connection;Second tap of the second primary coil of the H.V. step up transformer (1TV), capacitor C0 it is another The other end of one end and tested terminals (6) is connected to ground.
5. a kind of ac voltage withstanding test device according to claim 3, it is characterised in that: the H.V. step up transformer The secondary coil of (1TV) is at least connected in series by two the first high-voltage windings (Tx0) and the second high-voltage winding (Tx1), and described Between one high-voltage winding (Tx0) and the second high-voltage winding (Tx1) by the first disconnecting switch 2KM and the second disconnecting switch 3KM into It is electrically connected again with the partial pressure unit (7) after row switching, the control terminal of the first disconnecting switch KM is isolated with second The control terminal of switch 2KM is connect with the second control output end of the central controller respectively.
CN201820825723.9U 2018-05-30 2018-05-30 A kind of ac voltage withstanding test device Active CN208621711U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110308390A (en) * 2019-07-22 2019-10-08 国网江苏省电力有限公司苏州供电分公司 Integrated industrial frequency withstand voltage experimental rig

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110308390A (en) * 2019-07-22 2019-10-08 国网江苏省电力有限公司苏州供电分公司 Integrated industrial frequency withstand voltage experimental rig

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