CN217787297U - Phase-failure protector test bench - Google Patents
Phase-failure protector test bench Download PDFInfo
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- CN217787297U CN217787297U CN202221627844.5U CN202221627844U CN217787297U CN 217787297 U CN217787297 U CN 217787297U CN 202221627844 U CN202221627844 U CN 202221627844U CN 217787297 U CN217787297 U CN 217787297U
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Abstract
The utility model discloses a phase failure protector testboard relates to the test equipment field. The test accuracy and the detection efficiency can be effectively improved and the labor intensity can be reduced while various performance indexes are tested. The method comprises the following steps: the device comprises an input voltage regulation unit, an input open-phase control unit, a phase sequence selection unit, a protector test unit, an output load control unit, an output open-phase control unit, an output current regulation unit, an output direct-current voltage display unit, an output open-phase voltage display unit and a time characteristic selection unit, wherein the time characteristic selection unit comprises a starting response time option, an open-phase response time option and a delay holding time option and is used for displaying starting response time, open-phase response time and delay holding time through the time display unit; and the insulation resistance display is used for displaying the insulation resistance between the alternating current input and the direct current input, between the alternating current input and the ground and between the direct current output and the ground of the protector test.
Description
Technical Field
The utility model relates to a test equipment field, more specifically relate to open-phase protector testboard.
Background
With the rapid development of rail transit, the phase failure protector for railway signal field test is continuously updated. The test items of the phase loss protector for railway signals specified by the iron standard comprise: the method comprises the steps of outputting direct current voltage, outputting open-phase voltage, coil voltage drop, starting response time, open-phase response time, delay holding time (only a delay open-phase protector), alarming voltage, alarming function test (only a self-diagnosis function open-phase protector) and insulation resistance test.
The detection means for railway signals generally cannot meet the requirements of test work. The panel of the existing test bench has the problems that test items are incomplete, test conditions do not reach the standard, the test conditions are not designed according to the latest standard of the Ministry of railways, the test conditions which meet the requirements of iron standards cannot be met, and the like, so that the problem that test item points are incomplete or do not reach the standard is caused, and under the condition, tested open-phase protector equipment is moved to the field for use, and railway operation safety accidents are possibly caused.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a phase failure protector testboard when can testing to each item performance index, effectively improves measuring accuracy, detection efficiency and reduces intensity of labour.
The embodiment of the utility model provides an open-phase protector testboard, include:
the input voltage regulation is used for regulating input three-phase voltage and displaying the input alternating voltage through the input voltage display;
the input open-phase control, the output of which is electrically connected with the protector test through phase sequence selection, the input open-phase control is used for controlling the switch of three-phase voltage, and the input open-phase voltage is displayed by an input open-phase voltage display;
the phase sequence selection, the output of which is electrically connected with the protector test, is used for defining and controlling the phase sequence of the three-phase voltage according to the phase sequence of the tested open-phase protector;
the protector test is used for setting a tested open-phase protector, and the tested open-phase protector is used for providing working voltage for the protective relay;
the output load control is used for adjusting the working current of the tested open-phase protector; the input of the protector is electrically connected with the output of the protector test;
the output open-phase control is electrically connected with the output current regulation and is used for controlling the switching of the three-phase voltage and displaying the output open-phase voltage through the output open-phase voltage display;
the output current regulation is electrically connected with the load and is used for controlling the working current of the tested open-phase protector;
the output direct-current voltage display is electrically connected with the two direct-current outputs tested by the protector respectively at the input and the output and is used for displaying the direct-current voltage output between the two pins when the tested open-phase protector works normally;
the input and the output of the output open-phase voltage display are respectively electrically connected with the two direct current outputs tested by the protector and are used for displaying the output voltage of the tested open-phase protector when any one of the input or the output of the tested open-phase protector is disconnected;
a time characteristic selection, including a start response time option, an open phase response time option and a delay hold time option, for displaying the start response time, the open phase response time and the delay hold time through a time display;
and the insulation resistance display is used for displaying the insulation resistance between the alternating current input and the direct current output, between the alternating current input and the ground and between the direct current output and the ground of the protector test.
Preferably, the system also comprises a coil voltage drop selection, wherein the input of the coil voltage drop selection is electrically connected with the input phase failure control, and the output of the coil voltage drop selection is electrically connected with the output load control;
when the protector test works normally, the coil voltage drop selection is used for determining the voltage drop value between the alternating current input and the alternating current output included in the protector test, and the voltage drop value is displayed through the coil voltage drop display.
Preferably, the input voltage is regulated by a three-phase voltage regulator driven and regulated by a stepping motor, and the voltage regulation range of the three-phase voltage regulator is AC 0-440V;
the output of the three-phase voltage regulator is electrically connected with the input of three groups of main contacts included by the second contactor;
the output of three groups of main contacts of the second contactor is respectively and electrically connected with the input of main contacts of a third contactor, a fourth contactor and a fifth contactor; and the third contactor, the fourth contactor and the fifth contactor correspond to the three-phase voltage switch included in the input open-phase control.
Preferably, the main contact output of the fifth contactor is electrically connected with the third alternating current input of the protector test through the third contact of the sixth contactor; or the main contact output of the fifth contactor is electrically connected with the first alternating current input tested by the protector through the third contact of the eighth contactor;
the output of a main contact of the fourth contactor is electrically connected with a second alternating current input tested by the protector;
the main contact output of the third contactor is electrically connected with the first alternating current input tested by the protector through the first contact of the sixth contactor; or the main contact output of the third contactor is electrically connected with the third alternating current input tested by the protector through the first contact of the eighth contactor.
Wherein the sixth contact and the eighth contact correspond to a phase sequence relationship included in the phase sequence selection.
Preferably, an output current display is also included;
the input of the protector is electrically connected with the alternating current output included in the protector test through output load control;
the output current display is used for testing the output current tested by the protector.
Preferably, the output current display comprises outputs which are respectively electrically connected with the main contact inputs of the eleventh contactor, the twelfth contactor and the thirteenth contactor;
the main contact outputs of the eleventh contactor, the twelfth contactor and the thirteenth contactor are respectively electrically connected with the input of the output current regulation;
the output current is regulated by a three-phase voltage regulator driven by a stepping motor, and the current regulation range is AC 0-5A.
Preferably, the eleventh contactor, the twelfth contactor, and the thirteenth contactor correspond to switches outputting three-phase voltages included in the open-phase control.
Preferably, the starting response time represents the difference between the starting pull-in time of the protector test and the pull-in time of the protection relay, and the starting response time is qualified when the starting response time is less than or equal to 0.15 second;
the open-phase response time represents the difference between the open-phase release time tested by the protector and the release time of the protective relay, and the open-phase response time is qualified when the open-phase response time is less than or equal to 0.25 second;
the delay hold time represents a delay hold time of the protector test.
Preferably, the input of the protection relay is electrically connected with the protector test direct current output, and the output of the protection relay is electrically connected with the protector test direct current output;
the protector test is an X8454 standard test socket;
the protective relay is a JWXC-1700 safety relay.
The embodiment of the utility model provides an open-phase protector testboard, include: the input voltage regulation is used for regulating input three-phase voltage and displaying the input alternating voltage through an input voltage display; the input open-phase control, the output of which is electrically connected with the protector test through phase sequence selection, the input open-phase control is used for controlling the switch of three-phase voltage, and the input open-phase voltage is displayed by an input open-phase voltage display; the phase sequence selection, the output of which is electrically connected with the protector test, is used for defining and controlling the phase sequence of the three-phase voltage according to the phase sequence of the tested open-phase protector; the protector test is used for setting a tested open-phase protector, and the tested open-phase protector is used for providing working voltage for the protective relay; the output load control is used for adjusting the working current of the tested open-phase protector; the input of the protector is electrically connected with the output of the protector test; the output open-phase control is electrically connected with the output current regulation and is used for controlling the switching of the three-phase voltage and displaying the output open-phase voltage through the output open-phase voltage display; the output current regulation is electrically connected with the load and is used for controlling the working current of the tested open-phase protector; the output direct-current voltage display is electrically connected with the two direct-current outputs tested by the protector respectively at the input and the output and is used for displaying the direct-current voltage output between the two pins when the tested open-phase protector works normally; the input and the output of the output open-phase voltage display are respectively electrically connected with the two direct current outputs tested by the protector, and the output open-phase voltage display is used for outputting the output voltage of the tested open-phase protector when any one of the input or the output of the tested open-phase protector is disconnected; a time characteristic selection, including a start response time option, an open phase response time option and a delay hold time option, for displaying the start response time, the open phase response time and the delay hold time through a time display; and the insulation resistance display is used for displaying the insulation resistance between the alternating current input and the direct current output, between the alternating current input and the ground and between the direct current output and the ground of the protector test. The panel of the test board is based on a centralized measurement and control center with embedded IPC as a measurement and control core, and integrates a virtual instrument technology VI, an intelligent judgment technology, a database technology and a field bus technology MODBUS into a whole to form a measurement and control system; the test data is collected and stored by an embedded industrial personal computer, manual meter reading is cancelled, and data management intellectualization is realized; the input alternating voltage is continuously adjustable, the adjusting range is wide, and the over-voltage and under-voltage tests of the open-phase protector are met; the output alternating current is continuously adjustable, the adjusting range is wide, and the full-gear current test of the open-phase protector is met; the output direct current voltage and the output open-phase voltage are independently displayed, so that the test accuracy is improved; the protector tests all types of open-phase protectors and has the function of inserting and identifying tested pieces; the test bench panel effectively improves the test precision and the detection efficiency and reduces the labor intensity while testing various performance indexes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a main circuit of a test board of an open-phase protector according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a control panel structure of a test board of the open-phase protector according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a test board of the open-phase protector according to an embodiment of the present invention;
101-air switch, 102-test bench power supply control, 103-step-up transformer, 104-input voltage regulation, 105-test power supply control, 106-input open-phase control, 107-phase sequence selection, 108-protector test, 109-coil voltage drop selection, 110-output load control, 111-output current display, 112-output open-phase control, 113-output current regulation, 114-load, 115-three-phase input voltmeter, 116-protection relay, 117-output direct current voltage display and 118-output open-phase voltage display.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic diagram of a main circuit of a test board of an open-phase protector according to an embodiment of the present invention; fig. 2 is a schematic diagram of a control panel structure of a test board of the open-phase protector according to an embodiment of the present invention; fig. 3 is a schematic structural view of a test board of the open-phase protector according to an embodiment of the present invention; the phase failure protector test board provided by the embodiment of the invention is described in detail below with reference to fig. 1 to 3.
The embodiment of the utility model provides a phase failure protector testboard adopts the three-section three-dimensional structure as shown in fig. 3, and it includes test platform panel 201, load cabinet 202 and connects the connecting wire that test platform panel and load cabinet used. The test table panel 201 is provided with various test instruments, a liquid crystal display, a protector for testing, indicator lights for displaying various test states, and buttons and button switches for implementing various test functions, as shown in fig. 2.
In practical application, the automatic range digital instrument, the X8454 standard test socket special for the railway, the multifunctional change-over switch, the button switch and the indicator lamp are all arranged on the test table panel, so that the test operation is convenient; moreover, the test operation conditions required by the open-phase protector test and the output test results can be fed back from the panel of the test bench, so that the operability is strong, the operation is more visual, and the use is convenient.
Referring to the test bed panel in detail below, as shown in fig. 1, the test bed panel mainly includes an input voltage regulator 104, an input open-phase control 106, a phase sequence selector 107, a protector test 108, an output load control 110, an output open-phase control 112, an output dc control, an output dc voltage display 117, an output open-phase voltage display 118, a time characteristic selector, and an insulation resistance display.
Before describing the input voltage regulation 104, it is necessary to describe the circuitry prior to the output voltage regulation. Specifically, when the test bench works, a three-phase five-wire system AC380V +/-10% and a 50Hz +/-1 Hz power supply is used, wherein the three-phase five-wire system is U, V, W, N and PE, a three-phase wire U, V, W is connected to the input of a three-phase air switch 101 (QF 1) in a line side mode, further, a three-phase wire U, V, W is connected to the input of three groups of main contacts of a first contactor KM1 from the output of the air switch 101, and then is connected to the input of a three-phase alternating current switching port through three groups of main contacts of the first contactor KM 1. Here, the sucking up and off of the first contactor is controlled by a button included in the test stand power control 2 of the test stand panel, and the first contactor may also be referred to as a test stand panel power on/off control contactor.
Further, three-phase lines U, V, W are connected from the output of the three-phase ac switching port to the input of three-phase transformer T1, and three-phase lines U, V, W are connected from the output of step-up transformer 103 (T1) to the input of three-phase voltage regulator T2. It should be noted that the three-phase voltage regulator T2 is electrically connected to the stepping motor, and the stepping motor drives and regulates the three-phase voltage, that is, the output voltage of the three-phase voltage regulator is regulated within the range of AC0 to 440V through the regulation and control of the stepping motor. In the embodiment of the present invention, the combination of the three-phase voltage regulator and the stepping motor is called as the input voltage regulator 104, and the input voltage regulator 104 is controlled by the "fast rising", "fast falling", "slow rising", "slow falling" and "zero returning" buttons included in the input voltage regulator 104 in the test platform panel.
Further, the three-phase line U, V, W comprised by the input voltage regulation 104 is connected from the output of the three-phase voltage regulator T2 to the three main contact inputs comprised by the second contactor KM 2. In the embodiment of the present invention, the sucking up and the disconnection of the second contactor are controlled by the on/off button of the test power supply in the test platform, and meanwhile, the second contactor may also be called as a test power supply on/off control contactor.
Furthermore, three groups of main contact outputs of the second contactor are respectively and electrically connected with a main contact input of the third contactor, a main contact input of the fourth contactor and a main contact input of the fifth contactor; in an embodiment of the present invention, the third contactor, the fourth contactor, and the fifth contactor correspond to a switch of a three-phase voltage included in the open-phase input control. Namely, the third contactor, the fourth contactor and the fifth contactor are controlled by three toggle switches of "a phase", "B phase" and "C phase" in the input open-phase control 106 on the test table panel.
It should be noted that a three-phase input voltmeter 115 is further disposed between the second contactor and the input open-phase control 106, specifically, one of the three main contact outputs included in the second contactor is connected to the three-phase input voltmeter 115 (PV 1) in a branching manner, and is used for monitoring and collecting three-phase voltages; one branch is connected to a three-phase ac voltage calibration board, which is used to calibrate the three-phase input voltmeter 115PV 1.
Further, the main contact output of the fifth contactor is input through the third contact of the sixth contactor, and then is electrically coupled to the third ac input included in the protector test 108 through the third contact output of the sixth contactor, the main contact output of the fourth contactor is electrically coupled to the second ac input included in the protector test 108, the main contact output of the third contactor is input through the first contact of the sixth contactor, and then is electrically coupled to the first ac input included in the protector test 108 through the first contact output of the sixth contactor; the fifth contactor is electrically connected to the protector test 108 via a sixth contact to form a phase sequence.
The main contact output of the fifth contactor is input through the third contact of the eighth contactor, then is electrically connected with the first alternating current input included in the protector test 108 through the third contact output of the eighth contactor, the main contact output of the fourth contactor is electrically connected with the second alternating current input included in the protector test 108, the main contact output of the third contactor is input through the first contact of the eighth contactor, and then is electrically connected with the third alternating current input included in the protector test 108 through the first contact output of the eighth contactor; the fifth contactor is electrically connected to the protector test 108 through the sixth contact to form another phase sequence.
The protector test 108 includes a first ac input of pin 51, a second ac input of pin 31, and a third ac input of pin 11.
In the embodiment of the present invention, the sixth contactor and the eighth contactor correspond to the phase sequence relation included in the phase sequence selection 107, that is, the sixth contactor and the eighth contactor are controlled by the "phase sequence selection" button switch on the test board panel, and when the "phase sequence selection" button switch is placed in the "a11B31C51" gear, the sixth contactor is pulled in; when the 'phase sequence selection' toggle switch is placed in the 'A51B 31C 11' gear, the eighth contactor is closed.
Further, the first ac output included in the protector test 108 includes two paths, one path is electrically connected to the third contact input of the seventh contactor, and then is electrically connected to the main contact input of the tenth contactor through the third contact output of the seventh contactor; the second ac output included in protector test 108 is electrically coupled to the tenth contactor main contact input; the third ac output included in the protector test 108 includes two paths, one of which is electrically coupled to the first contact input of the seventh contactor, and then electrically coupled to the main contact input of the tenth contactor via the first contact output of the seventh contactor. The protector test 108 forms a phase sequence by electrically connecting the seventh contactor with the tenth contactor.
The other path of the first alternating current output included in the protector test 108 is electrically connected with a first contact input of a ninth contactor, and then is electrically connected with a main contact input of a tenth contactor through the first contact output of the ninth contactor; the second ac output included in protector test 108 is electrically coupled to the tenth contactor main contact input; the protector test 108 includes another third ac output electrically coupled to a third contact input of the ninth contactor and then electrically coupled to the tenth contactor main contact input via a third contact output of the ninth contactor. The protector test 108 forms another phase sequence by electrically connecting the ninth contactor and the tenth contactor.
The protector test 108 includes a first ac output pin 61, a second ac input pin 41, and a third ac input pin 21.
In the embodiment of the present invention, the seventh contactor and the ninth contactor correspond to the phase sequence relation included in the phase sequence selection 107, the seventh contactor and the ninth contactor are controlled by the button switch of the test board panel "phase sequence selection", and when the button switch is placed in the "a11B31C51" gear, the seventh contactor is pulled in; when the button switch is placed in the 'A51B 31C 11' gear, the ninth contactor is closed.
Further, an output current display 111 is further included, an input of the output current display 111 is electrically connected with the ac output included in the protector test 108 through the output load control 110, that is, the output current display 111 is electrically connected with the three-phase line U, V, W of the protector test 108 through the tenth contactor. Here, the output current display 111 is used to test the output current of the protector test 108.
Specifically, the three-phase line U, V, W (three alternating current outputs) included in the protector test 108 is electrically connected with three main contact inputs included in the tenth contactor respectively, and then the three main contact outputs are connected to Ia, ib and Ic measurement inputs of a three-phase alternating current meter PA1 included in the test board panel respectively, and the three-phase alternating current meter PA1 is used for monitoring and collecting three-phase currents of the tested open-phase protector. In the embodiment of the present invention, the three-phase current meter is the output current display 111.
It should be noted that the tenth contactor corresponds to the output load control 110, that is, the tenth contactor is controlled by a button switch included in the output load control 110 in the test platform panel, and when the button switch is set to the "on" position, the tenth contactor is pulled in; when the toggle switch is placed in the "off" position, the tenth contactor is opened.
Further, a three-phase line U, V, W is connected to the input sub-circuit of the three-phase ac current calibration board from the "Ia, ib, ic" measuring output of the three-phase ac current meter PA 1; the three-phase line U, V, W is respectively connected to the main contact inputs of the eleventh contactor, the twelfth contactor and the thirteenth contactor from the output terminals "Ia, ib and Ic" of the three-phase alternating current calibration board, and is electrically connected with the main contact inputs of the eleventh contactor, the twelfth contactor and the thirteenth contactor.
It should be noted that the eleventh contactor, the twelfth contactor, and the thirteenth contactor correspond to switches for outputting three-phase voltages included in the open-phase control 112, that is, the eleventh contactor, the twelfth contactor, and the thirteenth contactor are controlled by three toggle switches "a phase", "B phase", and "C phase" in the open-phase control 112 output on the test table panel. For example, when the toggle switch corresponding to the eleventh contactor is in the on position, the eleventh contactor is closed, otherwise, the eleventh contactor is opened; when the button switch corresponding to the twelfth contactor is arranged at the 'on' position, the twelfth contactor is attracted, otherwise, the twelfth contactor is disconnected; and when the button switch corresponding to the thirteenth contactor is arranged at the on position, the thirteenth contactor is switched on, otherwise, the thirteenth contactor is switched off.
Further, the main contact outputs of the eleventh contactor, the twelfth contactor and the thirteenth contactor are respectively electrically connected with the input of the output current regulator 113. It should be noted that the output current regulator 113 is actually a combination of a three-phase voltage regulator and a stepping motor, specifically, the three-phase voltage regulator T3 is electrically connected to the stepping motor, and the stepping motor drives the regulated current, that is, the output current of the three-phase voltage regulator ranges from AC0 to 5A through the regulation control of the stepping motor. In the embodiment of the present invention, the output current regulation 113 is controlled by the "fast rising", "fast falling", "slow rising", "slow falling" and "return to zero" buttons included in the output current regulation in the test platform panel.
Further, the output current regulation 113 is electrically coupled with inputs of three resistors comprised by the three-phase load 114, outputs of the three resistors being shorted together.
The embodiment of the utility model provides an open-phase protector testboard still includes output direct current voltage display 117, its input and output respectively with two direct current output electric connections of protector test 108, among two direct current output, a pin is positive, a pin is the burden. Specifically, the output dc voltage display 117 is used to display the dc voltage output between the two pins when the tested open-phase protector is working normally. Namely, the output direct current is the current in the output loop under the condition that the JWXC-1700 is connected in the output loop when the tested open-phase protector works normally. In an embodiment of the present invention, the protector test 108 may be an X8454 standard test socket.
When the tested open-phase protector works normally, the normally open contact of the protective relay 116 is closed, and at the moment, the measurement of the output direct-current voltage display 117 is switched to two direct-current output pins included in the protector test 108, so that the normally output direct-current voltage of the open-phase protector is measured.
The output dc voltage test is described below in conjunction with the output dc voltage display 117:
the input alternating voltage can be slowly increased by pressing a slow increasing button corresponding to the input voltage regulation; the input alternating voltage can be quickly increased by pressing a quick-increasing button; the input alternating voltage can be slowly reduced by pressing a slow reduction button; the input alternating voltage can be quickly reduced by pressing a quick reduction button; the input ac voltage can be brought back to zero by pressing the "return to zero" button.
The output alternating current can be slowly increased by pressing a slow increasing button corresponding to the output current regulation; the output alternating current can be quickly increased by pressing a quick-increasing button; the output alternating current can be slowly reduced by pressing a slow-down button; the output alternating current can be quickly reduced by pressing a 'quick reduction' button; the output alternating current can be returned to zero by pressing a zero return button.
For example, the "input voltage regulation" is regulated to 380V, the "output current regulation" is regulated to 1A, and the "output dc voltage display 117" displays the output dc voltage at the time of the phase loss protector 380V, 1A under test. And clicking a test button on a software interface by using a mouse, and automatically reading test data and judging the qualification by using the system.
The input voltage regulation is regulated to 380-76V (namely 304V), the output current regulation is regulated to 1A, and the output direct current voltage display 117 displays the output direct current voltage when the phase loss protector 304V and 1A are detected. And clicking a test button on a software interface by using a mouse, and automatically reading test data and judging the qualification by using the system.
The 'input voltage adjustment' is adjusted to 380+57V (namely 437V), 'output current adjustment' is adjusted to 5A, and the 'output direct current voltage display 117' table displays the output direct current voltage when the phase-failure protector 437V and 5A are detected. And clicking a test button on a software interface by using a mouse, and automatically reading test data and judging the qualification by using the system.
The embodiment of the utility model provides a protector platform that loses looks still includes output voltage display 118 that loses looks, its input and output respectively with two direct current output electric connections of protector test 108 for when being surveyed the input of protector that loses looks or output arbitrary disconnection, be surveyed the output voltage of protector that loses looks.
In practical applications, the output dc voltage indicator 117 and the output open-phase voltage indicator 118 are switched by a set of contacts (normally open and normally closed) of the protection relay 116 and then connected to two dc output pins included in the protector test 108, wherein the output dc voltage indicator 117 is connected to the normally open contact of the protection relay 116. In the embodiment of the present invention, the protection relay 116 is a JWXC-1700 safety relay.
When any one of the input side or the output side of the tested open-phase protector is disconnected, the protective relay 116 cannot be electrically attracted, and the output open-phase voltage display 118 connected to the normally closed contact measures that the test table is cut to two direct current output pins included in the protector test 108 and is used for measuring the output open-phase voltage of the open-phase protector.
The output open-phase voltage test is described below in conjunction with the output open-phase voltage display 118:
for example, the "input voltage regulation" is regulated to 380V, and the "output current regulation" is regulated to 1A. Clicking a test button on a software interface by a mouse, prompting by a system that test conditions are met, and clicking to determine that the test is finished after corresponding operation is requested. At this time, the button switch of the phase A in the 'input open-phase control' area is set to the 'open' position without clicking for determination, and the 'output open-phase voltage display 118' displays the output open-phase voltage when the phase of the protector 380V and the phase of the protector 1A, A to be tested are open-circuited. Clicking the 'confirm' button by the mouse, and automatically reading the test data and judging the qualification by the system. After the test is finished, the button switch of the 'A phase' is recovered to be related to the 'on' position.
"for example," input voltage regulation "is regulated to 380V, and" output current regulation "is regulated to 1A. Clicking a test button on a software interface by a mouse, prompting by a system that test conditions are met, and clicking to determine that the test is finished after corresponding operation is requested. At this time, the button switch of phase a in the "output open-phase control" area is set to the "open" position without clicking for determination, and the "output open-phase voltage display 118" displays the output open-phase voltage when the phase of the protector 380V and 1A, a to be tested are open-circuited. Clicking the 'confirm' button by the mouse, and automatically reading the test data and judging the qualification by the system. After the test is finished, the button switch of the 'a phase' is recovered to be related to the 'on' position.
The embodiment of the utility model provides a phase failure protector platform, still include coil voltage drop selection 109, its input sets up and inputs the electric connection with the phase failure, output and output load control 110 electric connection; when the protector test 108 is operating normally, the voltage drop value between the ac input and the ac output included in the protector test 108 is determined and displayed by the coil voltage drop display.
Specifically, the coil voltage drop of the test table panel is selected to include "a phase", "B phase" and "C phase". The coil voltage drop selection is electrically connected with the coil voltage drop display, and when the voltage drops generated on the three-phase coils of the phase A, the phase B and the phase C are respectively tested through the coil voltage, the test result is displayed through the coil voltage drop display.
The embodiment of the utility model provides a phase failure protector platform still includes the time characteristic selection, and it is including starting response time option, phase failure response time option and time delay holding time option on the test bench board.
Specifically, the start response time is a time from turning on the test power supply to pulling in the protection relay 116 of the tested open-phase protector disposed on the protector test 108, i.e., a difference between the start pull-in time of the protector test 108 and the pull-in time of the protection relay 116.
Illustratively, the "input voltage regulation" is regulated to 380V, the "output current regulation" is regulated to 1A, and the "time characteristic selection" switch is placed in the "startup response time" bit. The button switches of 'input open-phase control' and 'output open-phase control' are all set at 'on' position, the button switch of 'output load control' is set at 'off' position, and the 'zero clearing' button of the time schedule is pressed. And then the output load control toggle switch is arranged at an on position, and the time table displays the starting and closing time of the phase loss protector to be tested. In the embodiment of the utility model, it is qualified when start response time is less than or equal to 0.15 second.
It should be noted that the pull-in time of the protection relay 116 represents the pull-in time of the protection relay 116 in the test board panel, and the data is tested in advance and stored in the software reference table of the test board panel.
The open-phase response time is the time from the disconnection of a test power supply to the falling of the load safety relay JWXC-1700 of the open-phase protector under test, which is arranged on the protector test 108, in a normal working state; i.e., the difference between the open-phase release time of the protector test 108 and the release time of the protective relay 116.
Illustratively, the "input voltage regulation" is regulated to 380V, the "output current regulation" is regulated to 1A, and the "time characteristic selection" switch is placed in the "open phase response time" bit. The button switches of 'input open-phase control' and 'output open-phase control' are all set at 'on' position, the button switch of 'output load control' is set at 'on' position, and the 'zero clearing' button of the time schedule is pressed. Clicking a test button on a software interface by a mouse, prompting by a system that test conditions are met, and clicking to determine that the test is finished after corresponding operation is requested. At the moment, the output load control button switch is placed at an off position without clicking for determination, and the time table displays the open-phase release time of the detected open-phase protector. And clicking a test button on a software interface by using a mouse, and automatically reading test data and judging the qualification by using the system. In the embodiment of the utility model, it is qualified when open-phase response time is less than or equal to 0.25 second.
It should be noted that the release time of the protection relay 116 represents the release time of the protection relay 116 in the test platform panel, which has been tested in advance and stores the data in the table of the test platform panel software reference.
The delay hold time is the time from the disconnection of the test power supply to the falling of the protection relay 116 of the tested open-phase protector arranged on the protector test 108 under the delay specific test condition; i.e., the delay hold time of the protector test 108.
Illustratively, the "input voltage regulation" is regulated to 380V, the "output current regulation" is regulated to 1A, and the "time characteristic selection" switch is placed in the "delay hold time" bit. The button switches of 'input open-phase control' and 'output open-phase control' are all set at 'on' position, the button switch of 'output load control' is set at 'off' position, and the 'zero clearing' button of the time schedule is pressed. And then, the output load control button switch is placed at an on position, and the time table displays the delay holding time of the phase failure protector to be tested according to the model of the tested piece and waits for about 13s or 30 s. And clicking a 'test' button on a software interface by a mouse, and automatically reading test data and judging the qualification by the system. In the embodiment of the utility model, the delay holding time of the open-phase protector is up to 13s + -1 s or 30s + -1 s.
The embodiment of the utility model provides a phase failure protector platform still includes the insulation resistance display, and its insulation resistance that is used for showing between protector test 108's the AC input and DC output, AC input, between AC input and the ground, between DC output and the ground.
Illustratively, the phase loss protector tested on the ground of the protector test 108 is removed, a banana plug of an insulation resistance test line is inserted into a test hole below an insulation resistance display according to a mark, and an alligator clip is clamped on a son of the tested piece to test the insulation resistance between alternating current inputs 11, 31 and 51 and direct current outputs 1 and 2, between the alternating current inputs 11, 31 and 51 and the ground and between the direct current outputs 1 and 2 and the ground of the protector test 108 respectively.
Specifically, the alligator clip is clipped on the ac input 11 and the dc output 1, and the "insulation measuring" button is pressed, and the "insulation resistance display" displays the insulation resistance value between the ac input 11 and the dc output 1. And clicking a test button on a software interface by using a mouse, and automatically reading test data and judging the qualification by using the system. If the meter is shown as "OL", it indicates that the insulation resistance exceeds the meter's span (500M Ω).
According to the test method, the insulation resistance value between the alternating current input 11 and the direct current output 2 can be determined in sequence; the insulation resistance between the ac input 31 and the dc output 1; the insulation resistance between the ac input 31 and the dc output 2; insulation resistance between the ac input 51 and the dc output 1; the insulation resistance between the ac input 51 and the dc output 2; the insulation resistance between the ac input 11 and the ac input 31; the insulation resistance between the ac input 11 and the ac input 51; the insulation resistance between the ac input 31 and the ac input 51; the insulation resistance between the ac input 11 and ground; the insulation resistance between the ac input 31 and ground; the insulation resistance between the ac input 51 and ground; the insulation resistance value between the direct current output 1 and the ground; the value of the insulation resistance between the dc output 2 and ground.
It should be noted that the insulation resistance of the common open-phase protector is greater than or equal to 500M Ω, and the insulation resistance of the delay open-phase protector is greater than or equal to 100M Ω.
The phase failure protector platform provided by the embodiment of the utility model also comprises an alarm voltage and an alarm function test; the alarm voltage and alarm function test is only suitable for the open-phase protector with self-diagnosis function.
Illustratively, the voltage of "input voltage regulation" is regulated to 380V, the current of "output current regulation" is regulated to 1A, the "voltage regulation" knob of the "alarm test" zone is clockwise adjusted to the maximum, and the alarm test knob switch is placed in the "on" position.
At this time, the "normal indication" lamp should be turned on, and the "output dc voltage display 117" displays the output dc voltage of the open-phase protector. The 'voltage adjustment' knob is adjusted anticlockwise, the display value of the 'output direct current voltage display 117' is reduced until the 'normal indication' lamp is turned off, the 'alarm indication' lamp is turned on, and at the moment, the display value of the 'output direct current voltage display 117' is the alarm voltage value. Only under the condition that the alarm indicator lamp of the tested piece and the alarm indicator lamp of the test table panel are normally displayed, the alarm output function of the tested piece can be judged to be normal.
At this time, the "normal indication" lamp should be turned on, and the "output dc voltage display 117" displays the output dc voltage of the open-phase protector. The 'voltage adjustment' knob is adjusted anticlockwise, the display value of the 'output direct current voltage display 117' is reduced until the 'normal indication' lamp is turned off, the 'alarm indication' lamp is turned on, and at the moment, the display value of the 'output direct current voltage display 117' is the alarm voltage value. Only under the condition that the alarm indicator lamp of the tested piece and the alarm indicator lamp of the test table panel are normally displayed, the alarm output function of the tested piece can be judged to be normal. Clicking a ' manual ' test button on a software interface by a mouse, and popping up a dialog box to prompt ' whether normal? ", manually select click of the corresponding button. And after the test of outputting the alternating current of 1A is finished, adjusting the output current to be 5A to continue the test, and performing the same operation steps as the test of 1A. After the test is finished, the voltage adjusting knob is adjusted to be maximum clockwise, and the alarm test switch is arranged at an off position.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. Open-phase protector testboard, its characterized in that includes:
the input voltage regulation is used for regulating input three-phase voltage and displaying the input alternating voltage through the input voltage display;
the input open-phase control, the output of which is electrically connected with the protector test through phase sequence selection, the input open-phase control is used for controlling the switch of three-phase voltage, and the input open-phase voltage is displayed by an input open-phase voltage display;
the phase sequence selection, the output of which is electrically connected with the protector test, is used for defining and controlling the phase sequence of the three-phase voltage according to the phase sequence of the tested open-phase protector;
the protector test is used for setting a tested open-phase protector, and the tested open-phase protector is used for providing working voltage for a protection relay;
the output load control is used for adjusting the working current of the tested open-phase protector; the input of the protector is electrically connected with the output of the protector test;
the output open-phase control is electrically connected with the output current regulation and is used for controlling the switching of the three-phase voltage and displaying the output open-phase voltage through the output open-phase voltage display;
the output current regulation is electrically connected with the load and is used for controlling the working current of the tested open-phase protector;
the output direct-current voltage display is electrically connected with the two direct-current outputs tested by the protector respectively at the input and the output and is used for displaying the direct-current voltage output between the two pins when the tested open-phase protector works normally;
the output open-phase voltage display is used for displaying the output voltage of the tested open-phase protector when any one of the input or the output of the tested open-phase protector is disconnected;
a time characteristic selection, including a start response time option, an open phase response time option and a delay hold time option, for displaying the start response time, the open phase response time and the delay hold time through a time display;
and the insulation resistance display is used for displaying the insulation resistance between the alternating current input and the direct current output, between the alternating current input and the ground and between the direct current output and the ground in the protector test.
2. The test bench of claim 1, further comprising a coil voltage drop selector having an input electrically coupled to said input open-phase control and an output electrically coupled to said output load control;
when the protector test works normally, the coil voltage drop selection is used for determining the voltage drop value between the alternating current input and the alternating current output included in the protector test and displaying the voltage drop value through the coil voltage drop display.
3. The test bench of phase-failure protectors according to claim 1, wherein said input voltage regulation is a three-phase voltage regulator driven and regulated by a stepping motor, and the voltage regulation range is AC 0-440V;
the output of the three-phase voltage regulator is electrically connected with the input of three groups of main contacts included by the second contactor;
the output of three groups of main contacts of the second contactor is respectively and electrically connected with the input of main contacts of a third contactor, a fourth contactor and a fifth contactor; and the third contactor, the fourth contactor and the fifth contactor correspond to the three-phase voltage switch included in the input open-phase control.
4. The open phase protector test stand of claim 3, wherein the main contact output of the fifth contactor is electrically coupled to a third AC input of the protector test through a third contact of a sixth contactor; or the main contact output of the fifth contactor is electrically connected with the first alternating current input tested by the protector through the third contact of the eighth contactor;
the main contact output of the fourth contactor is electrically connected with a second alternating current input tested by the protector;
the main contact output of the third contactor is electrically connected with the first alternating current input tested by the protector through the first contact of the sixth contactor; or the main contact output of the third contactor is electrically connected with the third alternating current input tested by the protector through the first contact of the eighth contactor,
wherein the sixth contact and the eighth contact correspond to a phase sequence relationship included in the phase sequence selection.
5. The open phase protector test stand of claim 1, further comprising an output current display;
the input of the protector is electrically connected with the alternating current output included in the protector test through output load control;
the output current display is used for testing the output current tested by the protector.
6. The test bench of phase-loss protectors according to claim 5, wherein the output current display comprises outputs electrically connected with the main contacts of the eleventh contactor, the twelfth contactor and the thirteenth contactor respectively;
the main contact outputs of the eleventh contactor, the twelfth contactor and the thirteenth contactor are respectively electrically connected with the input of the output current regulation;
the output current is regulated by a three-phase voltage regulator driven by a stepping motor, and the current regulation range is AC 0-5A.
7. The loss of phase protector test stand of claim 6, wherein said eleventh contactor, twelfth contactor, thirteenth contactor correspond to switches outputting three-phase voltages included in said loss of phase control.
8. The open-phase protector test bench of claim 1, wherein the start response time represents a difference between a start pull-in time of the protector test and a pull-in time of a protection relay, and the test bench is qualified when the start response time is less than or equal to 0.15 second;
the open-phase response time represents the difference between the open-phase release time tested by the protector and the release time of the protective relay, and the open-phase response time is qualified when the open-phase response time is less than or equal to 0.25 second;
the delay hold time represents a delay hold time of the protector test.
9. The test bench of claim 1, wherein the input of said protection relay is electrically connected to the protector test dc output, and the output of said protection relay is electrically connected to the protector test dc output;
the protector test is an X8454 standard test socket;
the protective relay is a JWXC-1700 safety relay.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221627844.5U CN217787297U (en) | 2022-06-27 | 2022-06-27 | Phase-failure protector test bench |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221627844.5U CN217787297U (en) | 2022-06-27 | 2022-06-27 | Phase-failure protector test bench |
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| CN202221627844.5U Active CN217787297U (en) | 2022-06-27 | 2022-06-27 | Phase-failure protector test bench |
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