CN217981598U - High-voltage switch contact breaking capacity test equipment - Google Patents
High-voltage switch contact breaking capacity test equipment Download PDFInfo
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- CN217981598U CN217981598U CN202222232926.6U CN202222232926U CN217981598U CN 217981598 U CN217981598 U CN 217981598U CN 202222232926 U CN202222232926 U CN 202222232926U CN 217981598 U CN217981598 U CN 217981598U
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Abstract
The application provides a high-voltage switch contact breaking capacity testing device which comprises a control bus loop, a bus closing loop, a controller and a human-computer interface, wherein the controller is in signal connection with the human-computer interface; the bus control loop comprises a first alternating current-direct current converter, a test article contact, a rheostat and a shunt which are connected in series, and further comprises a current transmitter electrically connected with the shunt; the first AC-DC converter, the current transmitter and the test article contact are in signal connection with the controller; the switching-on and switching-off relay comprises a direct current coil operating power supply, an alternating current coil operating power supply and an alternating current and direct current switching-on and switching-off relay, wherein the output end of the direct current coil operating power supply is electrically connected with a contact of the alternating current and direct current switching-on and switching-off relay, the output end of the alternating current coil operating power supply is electrically connected with a contact of the alternating current and direct current switching-on and switching-off relay, the contact of the alternating current and direct current switching-on and switching-off relay is also electrically connected with a coil of a test article, and a control coil of the alternating current and direct current switching-on and switching-off relay is electrically connected with a controller. Therefore, the test efficiency of the test sample is improved.
Description
Technical Field
The application relates to the technical field of electrical component testing equipment, in particular to high-voltage switch contact breaking capacity testing equipment.
Background
Before the high-voltage switch is put on the market or after the high-voltage switch is used for a period of time, regular tests are required to determine that the contacts of the high-voltage switch can be normally combined and separated.
Before testing, firstly, selecting components with proper parameters, such as a power supply, a resistor and the like, and then connecting the components to obtain a test circuit; during testing, a test article is connected in a test circuit, and then the high-voltage switch can be switched on and off through the reset button, for example, when the high-voltage switch is a normally closed switch, a coil of the high-voltage switch is electrified, and whether a contact of the high-voltage switch can execute a disconnection action is observed; if the high-voltage switch can be disconnected, the reset button is pressed to test whether the high-voltage switch can be recovered to a normally closed state. Whether the high-voltage switch has the on-off capacity can be directly observed by the operation staff. If a new test article needs to be tested, a new component needs to be reselected, for example, a resistor with a resistance value smaller than that of the test article is selected, then the test circuit is reconnected, and then the test is realized through the reset key.
Obviously, in the prior art, the testing process basically needs to be completed manually, and the testing efficiency is low.
SUMMERY OF THE UTILITY MODEL
The application provides a high-voltage switch contact breaking capacity test equipment for solve the problem that exists among the background art.
The high-voltage switch contact breaking capacity testing equipment comprises a control bus loop, a closing bus loop, a controller and a human-machine interface, wherein the controller is in signal connection with the human-machine interface;
the control bus loop comprises a first alternating current-direct current converter, a test article contact, a rheostat, a current divider and a current transmitter, wherein the first alternating current-direct current converter, the test article contact, the rheostat and the current divider are connected in series, and the current transmitter is electrically connected with the current divider;
the first alternating current-direct current converter is in signal connection with the controller, the current transmitter is in signal connection with the controller, and the test article contact is in signal connection with the controller;
the switching-on/off relay comprises a DC coil operating power supply, an AC coil operating power supply and an AC/DC switching-on/off relay, wherein the output end of the DC coil operating power supply is electrically connected with the contact of the AC/DC switching-on/off relay, the output end of the AC coil operating power supply is electrically connected with the contact of the AC/DC switching-on/off relay, the contact of the AC/DC switching-on/off relay is also electrically connected with the coil of a test article, and the control coil of the AC/DC switching-on/off relay is electrically connected with the controller.
Optionally, the ac/dc switching on/off relay includes a dc switching on relay, a dc switching off relay, an ac switching on relay, and an ac switching off relay;
the contact of the direct current closing relay is electrically connected with the output end of the direct current coil operating power supply, the contact of the direct current closing relay is electrically connected with the test article contact, and the control coil of the direct current closing relay is electrically connected with the controller;
the contact of the direct-current opening relay is electrically connected with the output end of the direct-current coil operating power supply, the contact of the direct-current opening relay is electrically connected with the test article contact, and the control coil of the direct-current opening relay is electrically connected with the controller;
the contact of the alternating current closing relay is electrically connected with the output end of the alternating current coil operating power supply, the contact of the alternating current closing relay is electrically connected with the test article contact, and the control coil of the alternating current closing relay is electrically connected with the controller;
the contact of the alternating current brake-separating relay is electrically connected with the output end of the alternating current coil operating power supply, the contact of the alternating current brake-separating relay is electrically connected with the test article contact, and the control coil of the alternating current brake-separating relay is electrically connected with the controller.
Optionally, the control mother circuit further includes a voltage transmitter, the voltage transmitter is connected in parallel with a series circuit, the series circuit includes the test article contact and the varistor which are connected in series, and the voltage transmitter is further connected with the controller through a signal.
Optionally, the master control loop further comprises an inductor, and the inductor is connected in series between the test contact and the varistor.
Optionally, the control mother circuit further includes a capacitor and a resistor, the capacitor is connected in parallel with the resistor to obtain a parallel circuit, and the parallel circuit is connected in series between the high-voltage end of the first ac/dc converter and the low-voltage end of the first ac/dc converter.
Optionally, the control bus loop further comprises a diode, the diode is connected between the resistor and the test sample contact in series, and when the diode is conducted, current flows from the contact side to the resistor side.
Optionally, the inductor includes a plurality of inductors connected in series, and the inductors include a plurality of gear ends.
Optionally, the control mother circuit further includes a step motor, an output end of the step motor is mechanically connected to the varistor adjuster of the varistor, and an input end of the step motor is in signal connection with the controller.
Optionally, the control bus circuit further includes a contactor connected in series between the high-voltage output end of the first ac-dc converter and the test sample contact.
The high-voltage switch contact breaking capacity testing equipment provided by the embodiment of the application is provided with the human-computer interface, the controller and other electrical components, when a test sample is determined, a tester can send parameters of the electrical components required to be selected for testing the test sample to the controller through the human-computer interface, and the controller sets the electrical components according to the parameters to obtain a testing circuit corresponding to the test sample. For example, the output voltage value of the first ac/dc converter is set through the man-machine interface and the controller, so that the first ac/dc converter outputs voltage to the test sample contact and the rheostat according to the set voltage level; for another example, a coil operation power supply corresponding to the test article can be selected through a man-machine interface, so that the current output by the coil operation power supply sequentially flows through the relay and the test article coil; for another example, the resistance of the rheostat R1 is selected through the human-machine interface, so that the rheostat R1 can receive the current output by the first ac-dc converter. Furthermore, after the test circuit is configured, the disconnection of the contact in the test circuit is remotely controlled by the cooperation of the human-computer interface and the controller, so that the disconnection capability of the contact is tested, and various data involved in the test process are recorded by the controller; when a test article with different types is replaced, circuit parameters can be changed only by mutually matching the human-computer interface and the controller and reselecting different parameters of each element in the circuit, so that a test circuit suitable for a new test article is obtained, and the contact breaking capacity of the new test article is tested; compared with the prior art, the selection of parameters of each device in the test circuit and the control of the contact disconnection need to be carried out manually, which wastes time and labor and has low test efficiency; the high-voltage switch contact breaking capacity testing equipment provided by the embodiment of the application is simple and convenient to operate, and the testing efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a device for testing the breaking capability of a high-voltage switch contact according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating a connection relationship between an ac/dc switching on/off relay, a controller, and an ac/dc coil operating power supply according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a device for testing the breaking capability of a high-voltage switch contact according to yet another embodiment of the present application;
FIG. 4 is an interface diagram for generating a report according to an embodiment of the present application;
fig. 5 is a schematic view of an operation interface of a contactor according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. In addition, it should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 shows a high-voltage switch contact breaking capability test device according to an embodiment of the application. As shown in fig. 1, the high-voltage switch contact breaking capability test device comprises a control mother circuit, a closing mother circuit, a controller and a human-computer interface, wherein the controller is in signal connection with the human-computer interface;
the control bus loop comprises a first alternating current-direct current converter, a test article contact, a rheostat R1, a current divider and a current transmitter (not shown in the figure), wherein the first alternating current-direct current converter, the test article contact, the rheostat R1 and the current divider are connected in series, and the current transmitter is electrically connected with the current divider.
In fig. 1, the element in the control bus loop within the dashed box is a sample SP, and the sample SP includes a sample contact and a sample coil.
The first alternating current-direct current converter is in signal connection with the controller, the current transmitter A is in signal connection with the controller, and the test article contact is in signal connection with the controller.
The switching-on/off relay comprises a direct current coil operating power supply 200, an alternating current coil operating power supply 300 and an alternating current/direct current switching-on/off relay 100, wherein the output end of the direct current coil operating power supply 200 is electrically connected with a contact of the alternating current/direct current switching-on/off relay 100, the output end of the alternating current coil operating power supply 300 is electrically connected with a contact of the alternating current/direct current switching-on/off relay 100, the contact of the alternating current/direct current switching-on/off relay 100 is also electrically connected with a coil of a test article, and a control coil of the alternating current/direct current switching-on/off relay 100 is electrically connected with a controller.
The Controller may be a Programmable Logic Controller (PLC).
The Human-Machine Interface (HMI) is an Interface of input/output equipment for establishing contact and exchanging information between a person and a computer, and the Human-Machine Interface equipment can comprise a keyboard, a display, a printer, a mouse and the like.
Furthermore, the human-computer interface is connected with industrial control equipment such as a Programmable Logic Controller (PLC), a frequency converter, a direct current speed regulator, an instrument and the like, and is displayed by a display screen, and working parameters or operation commands are written in through an input unit (such as a touch screen, a keyboard, a mouse and the like) so as to realize digital equipment for information interaction between a human and a machine.
The human-machine interface may also include some display interfaces, illustratively, as shown in fig. 4-5, which show some of the operation interfaces in the human-machine interface.
The ac/dc switching relay 100 includes a dc switching relay and an ac switching relay, and further includes a dc switching relay and a dc switching relay, and the ac switching relay includes an ac switching relay and an ac switching relay. The related description is referred to the related content hereinafter, and will not be detailed here.
For convenience of description, in the embodiment of the present application, a test sample contact is a normally open contact, a current required by a test sample coil is a direct current, and tests of other types of test samples are similar to the normally open contact and are not described one by one.
The working principle and the using process of the high-voltage switch contact breaking capacity testing equipment are as follows:
determining the voltage magnitude which should be output by the first AC/DC converter and the resistance magnitude which should be selected by the rheostat R1 in advance according to the rated current of the test sample contact, the resistance value range of the rheostat R1 and the voltage range which can be output by the first AC/DC converter;
the voltage which should be output by the first alternating current-direct current converter and the resistance value which should be possessed by the rheostat R1 are subject to the condition that the current in the control mother loop is smaller than the rated current of the test sample contact;
for example, if the rated current of the determined test sample contact is 20A direct current, the size of the varistor R1 is 0-20 ohms, and the output voltage of the first ac/dc converter is 0-240V, the output voltage of the first ac/dc converter is determined to be 100V, and the specific resistance value of the varistor R1 is 10 ohms;
in addition, the voltage magnitude which is calculated and should be output by the first alternating current-direct current converter can be manually calculated by a tester, and can also be subjected to auxiliary calculation by a computer;
the voltage which is calculated and obtained and is required to be output by the first alternating current-direct current converter is sent to the controller through the man-machine interface;
the controller controls the first alternating current-direct current converter to select a voltage output gear, and the voltage output gear is consistent with the calculated voltage;
it should be noted that, the above steps are all calculation or selection steps, and no current exists in the control mother circuit before no industrial power supply is connected;
the output end of the industrial power supply is electrically connected with the input end of the first alternating current-direct current converter, so that the industrial power supply supplies power to the first alternating current-direct current converter, and alternating current is converted into variable direct current through the first alternating current-direct current converter; because a common industrial power supply is alternating current, alternating industrial alternating current is converted into variable direct current through the first alternating current-direct current converter;
determining the rated voltage or the rated current of the test coil in advance, for example, the determined rated voltage is 10V direct current, and the current is 20A;
connecting a test sample contact between a high-voltage output end of a first alternating current-direct current converter of the control bus circuit and a rheostat R1, and connecting a test sample coil with a contact of an alternating current-direct current closing relay 100;
a tester sends a test article coil electrifying instruction to the controller through the human-computer interface, the controller receives the instruction and energizes the control coil of the closing relay corresponding to the test article, the contact of the closing relay is closed after the control coil is energized, therefore, the direct current coil operating power supply 200 supplies power to the test article coil, and after the test article coil is energized, whether the test article contact is closed or not is observed.
If the closing action can be normally executed, the high-voltage switch can be normally used, if the closing action cannot be normally executed, the high-voltage switch cannot be normally used, or the test circuit has a problem, and the test circuit can be checked and the test operation can be executed again.
The above steps do not need to be performed strictly before and after the above description, and the order of some steps may be changed, for example, the connection of the ac power source may be completed in advance, as long as it is ensured that the currents in the control mother circuit and the closing mother circuit are both less than or equal to the rated currents of the elements.
Furthermore, the controller can also control the resistance value of the rheostat R1 to change, so that the current in the control mother loop is changed, and the breaking capacity of the test sample contact under different currents can be tested.
Further, after the circuit connection is completed, each data collector in the circuit collects data in real time, sends the data to the controller, and the controller stores the data, for example:
the first AC-DC converter sends the output voltage value and the current value to the controller, and the controller stores the output voltage value and the current value;
the current transducer A acquires the current value of the shunt, converts the current value into data which can be identified by the controller, and transmits the data to the controller for storage;
the controller detects the current state of the test sample contact in real time, and sends the current state of the test sample contact to the controller in real time, and the controller stores the current state;
the controller obtains the actual size of the varistor R1 and stores it.
If the current test article is tested, and a next test article needs to be tested, a power-off command of the test article coil is input through the human-computer interface, so that the direct-current closing relay disconnects the electric connection between the direct-current coil operating power supply 200 and the test article coil, then the current test article is detached, and the operation process is repeatedly executed on the next test article to complete the test.
Further, the testing frequency can be sent to the controller through the human-machine interface, for example, the testing frequency is 60 seconds, and the controller controls each element to execute the testing operation once every 60 seconds without setting by a worker through the human-machine interface again.
In the above-mentioned test piece contact, the rated voltage and the rated current of the test piece coil can be directly obtained from the instruction manual of the test piece itself.
In addition, as shown in fig. 1, similar to the control bus circuit, the dc coil operating power supply 200 in the bus circuit needs to convert an industrial ac power supply into a dc power through a second ac/dc converter to obtain the dc coil operating power supply 200.
The high-voltage switch contact breaking capacity testing equipment provided by the embodiment of the application is provided with the human-computer interface, the controller and other electrical components, when a test sample is determined, a tester can send parameters of the electrical components to be selected for testing the test sample to the controller through the human-computer interface, and the controller sets the electrical components according to the parameters to obtain a testing circuit corresponding to the test sample. For example, the output voltage value of the first ac/dc converter is set through the man-machine interface and the controller, so that the first ac/dc converter outputs voltage to the test sample contact and the rheostat according to the set voltage level; for another example, a coil operation power supply corresponding to the test article can be selected through a man-machine interface, so that the current output by the coil operation power supply sequentially flows through the relay and the test article coil; for another example, the resistance of the rheostat R1 is selected through the human-machine interface, so that the rheostat R1 can receive the current output by the first ac-dc converter. Furthermore, after the test circuit is configured, the disconnection of the contact in the test circuit is remotely controlled by the cooperation of the human-computer interface and the controller, so that the disconnection capability of the contact is tested, and various data involved in the test process are recorded by the controller; when a test article with different types is replaced, circuit parameters can be changed only by mutually matching the human-computer interface and the controller and reselecting different parameters of each element in the circuit, so that a test circuit suitable for a new test article is obtained, and the contact breaking capacity of the new test article is tested; compared with the prior art, the selection of parameters of each device in the test circuit and the control of the contact disconnection need to be carried out manually, which wastes time and labor and has low test efficiency; the high-voltage switch contact breaking capacity testing equipment provided by the embodiment of the application is simple and convenient to operate, and the testing efficiency is improved.
In addition, the high-voltage switch contact breaking capability test equipment provided by the embodiment of the application can record all test data of a test sample from factory to current time so as to clearly know the change condition of the performance of the high-voltage switch and guide the use of other high-voltage switches of the same type, for example, after the high-voltage switch is used for a long time, the breaking performance of the test sample begins to decline, the time required for breaking becomes long, and whether a new high-voltage switch needs to be replaced or not is determined according to specific conditions.
The performance of the high-voltage switch can be analyzed through the data acquired by the controller, for example, the time required by the action of the contact is calculated, for example, the difference between the time when the test coil is powered and the time when the contact is in action is taken, the difference value is taken as the time required by the action of the contact, the time required by the contact to complete switching-on or switching-off can be acquired according to the time, and the longer the time is, the worse the switching-off performance of the test is.
Optionally, the controller may further comprise a dc relay controller and an ac relay controller. When the relay needs to be controlled, the control instruction can be sent to the relay controller, and then the relay controller executes control operation on the relay.
Optionally, the set test circuit can be packaged in an electric cabinet, and a wiring terminal is arranged on the outer surface of the electric cabinet, so that when the test is performed, only the related end of the test sample needs to be electrically connected with the wiring terminal outside the electric cabinet.
Further, the test article can be supported through the support to conveniently be connected with the wiring end electricity outside the electric cabinet.
Optionally, referring to fig. 4 and 5, operation interfaces of two human-machine interfaces are shown for the embodiment of the present application.
Referring to fig. 5, the process of controlling the contactor KM through the interface may be:
a KM operation interface is displayed through a human-computer interface, and a switching-on button and a switching-off button are displayed on the KM operation interface, wherein the switching-on button is used for enabling the KM to be closed and the circuit to be conducted, the switching-off button is used for enabling the KM to be disconnected and the circuit to be not conducted;
when the KM needs to be operated, an opening button or a closing button on an operation interface is clicked;
the man-machine interface sends an opening or closing instruction to the controller;
and then the controller outputs voltage to the coil of the contactor KM or stops outputting the voltage, so that the opening and closing action operation of the KM is realized, and the current is controlled by opening and closing the KM main contact.
The functions and operation processes of other operation interfaces are similar to those described above, or refer to the drawings, and are not described in detail herein.
Optionally, the bus-in circuit further includes a first energy storage device and a second energy storage device, and the first energy storage device is connected between the second ac/dc converter and the dc switch-on/off relay; and the second energy storage equipment is connected between the industrial alternating current and the alternating current on-off relay.
The first energy storage equipment and the second energy storage equipment are used for supplying power to the energy storage motor voltage regulator corresponding to the test article coil, so that the energy storage motor voltage regulator can normally operate. The high-voltage switch needs to have an automatic reclosing function and provide kinetic energy for rapid opening and closing, so that an energy storage mechanism (a first energy storage device and a second energy storage device) inside the high-voltage switch needs to be charged and stored to help a test sample to realize opening and closing actions.
Alternatively, referring to fig. 2, the ac/dc switching on/off relay 100 includes a dc switching on relay, a dc switching off relay, an ac switching on relay, and an ac switching off relay.
The contact of the direct current closing relay is electrically connected with the output end of the direct current coil operating power supply 200, the contact of the direct current closing relay is electrically connected with the test object contact, and the control coil of the direct current closing relay is electrically connected with the controller.
The contact of the direct current opening relay is electrically connected with the output end of the direct current coil operating power supply 200, the contact of the direct current opening relay is electrically connected with the test object contact, and the control coil of the direct current opening relay is electrically connected with the controller.
The contact of the alternating current closing relay is electrically connected with the output end of the alternating current coil operating power supply 300, the contact of the alternating current closing relay is electrically connected with the test article contact, and the control coil of the alternating current closing relay is electrically connected with the controller.
The contact of the alternating current brake-separating relay is electrically connected with the output end of the alternating current coil operating power supply 300, the contact of the alternating current brake-separating relay is electrically connected with the test article contact, and the control coil of the alternating current brake-separating relay is electrically connected with the controller.
For convenience of description, a test sample is taken as a normally open contact, and a relay is taken as a dc closing relay for example, and the use process of the structure shown in fig. 2 is as follows:
a tester sends a power supply instruction to the controller through the man-machine interface, and the power supply instruction carries a relay identifier needing power supply;
the controller receives a power supply instruction and supplies power to a control coil of the relay corresponding to the relay identifier according to the relay identifier, after the control coil is electrified, a contact of the direct current closing relay is changed from normally open to normally closed, and a closing female loop is conducted;
the electricity of the direct current coil operating power supply 200 is transmitted to the test coil through the contact of the direct current closing relay, after the test coil is obtained, the test contact is changed from normally open to normally closed, and the control female loop is conducted.
After the test of present examination article is accomplished, send the test to the controller through human-computer interface and accomplish the instruction, after the controller received this instruction, no longer supply power to the control coil of direct current combined floodgate relay, but to the control coil power supply of direct current separating brake relay, thereby make direct current combined floodgate relay's contact become normally by the normally closed, direct current separating brake relay's contact becomes normally open by the normally closed, the female circuit of accuse is in off-state with closing female circuit, thereby can tear the examination article off from the return circuit.
Wherein the contacts of each relay in fig. 2 are also electrically connected to the coil of the test article, not shown in fig. 2.
For other relays, similar to the above-mentioned usage process, it will not be described in detail here.
Optionally, referring to fig. 3, the control master loop further comprises a voltage transmitter V connected in parallel with a series circuit comprising the test contact and the varistor R1 in series, the voltage transmitter V further being in signal connection with the controller.
The voltage transmitter V is used for acquiring the voltage of the series circuit, converting the acquired voltage into data which can be identified by the controller and sending the data to the controller; the controller receives and stores the voltage data sent by the voltage transmitter V.
Compared with the method that the voltage output by the first alternating current-direct current converter is used for replacing the voltage of the series circuit, the voltage of the series circuit can be acquired more accurately through the voltage transducer V.
Optionally, referring to fig. 3, the control bus loop further includes an inductor, and the inductor is connected in series between the test contact and the varistor.
Direct current is used in the control mother circuit, but induced current can be generated due to mutual induction of components in the circuit, alternating current possibly exists in the induced current, and the influence on the circuit is reduced by blocking the alternating current from passing through the inductor.
Optionally, referring to fig. 3, the inductor includes a plurality of inductors, and the plurality of inductors are connected in series, and the plurality of inductors include a plurality of gear ends.
The plurality of gear ends are used for short-circuiting inductors, and the inductors with different sizes are connected into a control mother loop; therefore, after the plurality of inductors are arranged, the plurality of gears can be arranged, different gears are selected through the gear ends to connect the inductors with different sizes into the control mother circuit, and the test range of the control circuit is expanded.
Optionally, referring to fig. 3, the control bus circuit further includes a capacitor C and a resistor R2, where the capacitor C is connected in parallel with the resistor R2 to obtain a parallel circuit, and the parallel circuit is connected in series between a high-voltage end of the control bus and a low-voltage end of the control bus.
The capacitor C is used for absorbing reverse current through the capacitor C when the reverse current is generated in the control bus circuit. Further, the reaction current absorbed by the capacitor C can be released to the resistor R2, thereby reducing the influence of the reaction current on the control bus.
Optionally, referring to fig. 3, the bus control loop further includes a diode D connected in series between the resistor R2 and the test contact, and when the diode D is turned on, current flows from the contact side to the resistor R2 side.
The diode D is used for leading the current flowing backwards into the resistor R2 through the diode when the current of the inductor or the rheostat R1 flows backwards, so that the current flowing backwards is absorbed through the resistor R2, and the stability of the master control loop is improved.
Optionally, referring to fig. 3, the master control loop further includes a stepping motor M, an output end of the stepping motor M is mechanically connected to the varistor adjuster of the varistor R1, and an input end of the stepping motor M is in signal connection with the controller.
A tester sends a rheostat adjusting instruction to a controller through a man-machine interface, the rheostat adjuster which carries the rheostat adjuster is located at the position of the rheostat, the rheostat adjuster of the rheostat R1 is moved through a stepping motor M, and after the adjuster is adjusted to a preset position, the resistance of the rheostat R1 is consistent with the preset resistance.
Different resistors can be connected into the control mother circuit through the rheostat R1, so that currents in the circuits are different, and the requirements of different test article contacts on the currents in the control mother circuit are met.
Optionally, referring to fig. 3, the control box loop further includes a contactor KM, and the contactor KM is connected in series between the high-voltage output end of the control box and the test sample contact.
The contactor KM is used for controlling the on-off of the control mother circuit, for example, when the circuit is in failure, the circuit can be switched on through the contactor KM in an emergency disconnection mode, and the damage to other devices in the circuit is reduced.
Or when the breaking capacity of the normally closed contact needs to be tested, if the contactor KM is not provided, the control mother loop is always in a conducting state, and the situation of electric energy waste exists. Therefore, when the contactor KM is electrically connected in the control bus circuit, the control bus circuit can be in an open state by using the contactor KM before testing, so as to reduce the waste of electric energy.
In addition, it should be noted that the device for testing the breaking capability of the high-voltage switch contact provided in the embodiment of the present application may be used to test the main contact of the high-voltage switch, or may be used to test the auxiliary contact of the high-voltage switch, and only during the test, the size of a part of elements, for example, the varistor R1, needs to be replaced according to the test contact, or a varistor with a larger varistor range may be directly used, so that the operation of replacing the varistor is omitted.
Finally, it should be noted that all the contents not described in the technical solutions of the present application can be implemented by using the prior art. In addition, the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. The high-voltage switch contact breaking capacity testing equipment is characterized by comprising a control bus loop, a closing bus loop, a controller and a human-computer interface, wherein the controller is in signal connection with the human-computer interface;
the control bus loop comprises a first alternating current-direct current converter, a test article contact, a rheostat, a current divider and a current transmitter, wherein the first alternating current-direct current converter, the test article contact, the rheostat and the current divider are connected in series, and the current transmitter is electrically connected with the current divider;
the first alternating current-direct current converter is in signal connection with the controller, the current transmitter is in signal connection with the controller, and the test article contact is in signal connection with the controller;
the switching-on/off relay comprises a DC coil operating power supply, an AC coil operating power supply and an AC/DC switching-on/off relay, wherein the output end of the DC coil operating power supply is electrically connected with the contact of the AC/DC switching-on/off relay, the output end of the AC coil operating power supply is electrically connected with the contact of the AC/DC switching-on/off relay, the contact of the AC/DC switching-on/off relay is also electrically connected with the coil of a test article, and the control coil of the AC/DC switching-on/off relay is electrically connected with the controller.
2. The device for testing the opening and closing capacity of the high-voltage switch contact according to claim 1, wherein the alternating current/direct current switching-on/switching-off relay comprises a direct current switching-on relay, a direct current switching-off relay, an alternating current switching-on relay and an alternating current switching-off relay;
the contact of the direct current closing relay is electrically connected with the output end of the direct current coil operating power supply, the contact of the direct current closing relay is electrically connected with the test article contact, and the control coil of the direct current closing relay is electrically connected with the controller;
the contact of the direct current opening relay is electrically connected with the output end of the direct current coil operating power supply, the contact of the direct current opening relay is electrically connected with the test article contact, and the control coil of the direct current opening relay is electrically connected with the controller;
the contact of the alternating current closing relay is electrically connected with the output end of the alternating current coil operating power supply, the contact of the alternating current closing relay is electrically connected with the test article contact, and the control coil of the alternating current closing relay is electrically connected with the controller;
the contact of the alternating current brake-separating relay is electrically connected with the output end of the alternating current coil operating power supply, the contact of the alternating current brake-separating relay is electrically connected with the test article contact, and the control coil of the alternating current brake-separating relay is electrically connected with the controller.
3. The high voltage switch contact breaking capability testing apparatus of claim 2, wherein the control bus further comprises a voltage transmitter connected in parallel with a series circuit comprising the test contact and the varistor in series, the voltage transmitter further connected in signal connection with the controller.
4. The high voltage switch contact breaking capability testing apparatus of claim 3, wherein the control bus circuit further comprises an inductor, and the inductor is connected in series between the test contact and the varistor.
5. The high-voltage switch contact breaking capability testing equipment according to claim 3, wherein the control bus circuit further comprises a capacitor and a resistor, the capacitor is connected in parallel with the resistor to obtain a parallel circuit, and the parallel circuit is connected in series between the high-voltage end of the first AC-DC converter and the low-voltage end of the first AC-DC converter.
6. The high-voltage switch contact breaking capability test device according to claim 5, wherein the control bus circuit further comprises a diode which is connected in series between the resistor and the test piece contact, and when the diode is turned on, current flows from the contact side to the resistor side.
7. The apparatus for testing the breaking capability of the high-voltage switch contact according to claim 4, wherein the inductor comprises a plurality of inductors, and the plurality of inductors are connected in series, and the plurality of inductors comprise a plurality of gear ends.
8. The high-voltage switch contact breaking capability test device according to any one of claims 1 to 4, wherein the control bus circuit further comprises a stepping motor, an output end of the stepping motor is mechanically connected with a rheostat regulator of the rheostat, and an input end of the stepping motor is in signal connection with the controller.
9. The apparatus for testing the breaking capability of the high-voltage switch contact according to claim 8, wherein the control bus circuit further comprises a contactor connected in series between the high-voltage output end of the first ac-dc converter and the test sample contact.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116759664A (en) * | 2023-06-06 | 2023-09-15 | 国网江苏省电力有限公司泰州供电分公司 | Online capacity checking device and method for storage battery pack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116759664A (en) * | 2023-06-06 | 2023-09-15 | 国网江苏省电力有限公司泰州供电分公司 | Online capacity checking device and method for storage battery pack |
| CN116759664B (en) * | 2023-06-06 | 2024-01-09 | 国网江苏省电力有限公司泰州供电分公司 | Online capacity checking device and method for storage battery pack |
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