Load control device

Abstract

The embodiment of the utility model provides a load control device, and relates to the technical field of load control, and the load control device comprises a plurality of input interfaces, a plurality of first contactors, a plurality of second contactors, a plurality of load devices, a plurality of first operation units, and a plurality of second operation units. Wherein the input interfaces are respectively used for connecting to-be-tested power supply devices, the input interfaces are respectively connected with load devices through main contacts of the first contactors, and two adjacent load devices are connected through main contacts of the second contactors; a first contact of the first operation unit is used for connecting a positive power line, a second contact of the first operation unit is connected with a negative power line through a coil of the first contactor, a first contact of the second operation unit is used for connecting a positive power line, and a second contact of the second operation unit is connected with the negative power line through a coil of the second contactor. According to the load control device, the plurality of to-be-tested power supply devices can be tested respectively, the number of loads is reduced, and the heat dissipation efficiency of the loads is improved.

Description

Technical Field

[0001] The present application relates to the technical field of load control, and in particular to a load control device. Background Art

[0002] With the development of power systems and the improvement of automation levels, the requirements for power station power are becoming higher and higher. Power station power testing is an important link to ensure the normal operation and efficient power generation of power stations, which can ensure the quality of power generation and system safety.

[0003] Currently, different loads are set for different power stations, and the neutral line and the live line of the power station are connected to the loads, so as to perform power tests on different power stations.

[0004] However, when testing the power of multiple power stations, it is necessary to set a different load for each power station, which makes the entire test circuit structure layout complicated and the heat dissipation difficult due to the excessive number of loads. Utility Model Content

[0005] The utility model aims to provide a load control device, which can realize power testing of multiple power supply devices to be tested respectively by controlling the same load device, thereby reducing the number of loads and improving the heat dissipation efficiency of the loads.

[0006] In a first aspect, an embodiment of the present application provides a load control device, the load control device comprising:

[0007] A plurality of input interfaces, a plurality of first contactors, a plurality of second contactors, a plurality of load devices, a plurality of first operating units, and a plurality of second operating units;

[0008] The multiple input interfaces are respectively used to connect to the load interfaces of the multiple power supply devices to be tested, the multiple input interfaces are respectively connected to the multiple load devices through the main contacts of the multiple first contactors, and one load device of two adjacent load devices is connected to the other load device through the main contact of a second contactor;

[0009] The first contacts of the multiple first operating units are used to connect the positive power line of the preset working power supply, and the second contacts of the multiple first operating units are respectively connected to the negative power line of the preset working power supply through the coils of the multiple first contactors. The first contacts of the multiple second operating units are used to connect the positive power line of the preset working power supply, and the second contacts of the multiple second operating units are respectively connected to the negative power line of the preset working power supply through the coils of the multiple second contactors.

[0010] Optionally, the first normally open contact of a first operating unit is used to connect the positive power line of the preset working power supply, the second normally open contact of the first operating unit is connected to the first normally closed contact of the first operating unit, and the second normally closed contact of the first operating unit is connected to the negative power line of the preset working power supply through the coil of a first contactor.

[0011] Optionally, a group of auxiliary contacts of the first contactor are connected in parallel to both ends of the first normally open contact and the second normally open contact of the first operating unit.

[0012] Optionally, the first normally open contact of a second operating unit is used to connect the positive power line of the preset working power supply, the second normally open contact of the second operating unit is connected to the first normally closed contact of the second operating unit, and the second normally closed contact of the second operating unit is connected to the negative power line of the preset working power supply through the coil of a second contactor.

[0013] Optionally, a group of auxiliary contacts of the second contactor are connected in parallel to both ends of the first normally open contact and the second normally open contact of the second operating unit.

[0014] Optionally, the multiple input interfaces include: a single-phase input interface, a live wire interface of the single-phase input interface is used to connect to a live wire load interface of the single-phase power supply device to be tested, and a neutral wire interface of the single-phase input interface is used to connect to a neutral wire load interface of the single-phase power supply device to be tested;

[0015] The live wire interfaces of the single-phase input interface are respectively connected to a plurality of load units in a load device through a multi-phase main contact of a first contactor.

[0016] Optionally, the multiple input interfaces include: a multi-phase input interface, a multi-phase live wire interface of the multi-phase input interface is used to connect to a multi-phase live wire load interface of the multi-phase power supply device to be tested, and a neutral wire interface of the multi-phase input interface is used to connect to a neutral wire load interface of the multi-phase power supply device to be tested;

[0017] The live wire interfaces of the multi-phase input interface are respectively connected to a plurality of load units in a load device through the multi-phase main contacts of a first contactor.

[0018] Optionally, the first operating unit and the second operating unit are operating buttons or operating knobs.

[0019] Optionally, the first operating unit and the second operating unit respectively include: a relay, and the relay is also used to connect to a preset control unit.

[0020] Optionally, the preset working power supply is a preset DC working power supply or an AC working power supply.

[0021] Beneficial effects of this application:

[0022] An embodiment of the present application provides a load control device, which includes multiple input interfaces, multiple first contactors, multiple second contactors, multiple load devices, multiple first operating units, and multiple second operating units; wherein the multiple input interfaces are respectively used to connect to the load interfaces of multiple power supply devices to be tested, the multiple input interfaces are respectively connected to the multiple load devices through the main contacts of the multiple first contactors, and one load device in two adjacent load devices is connected to the other load device through the main contact of a second contactor; the first contacts of the multiple first operating units are used to connect to the positive power line of a preset working power supply, the second contacts of the multiple first operating units are respectively connected to the negative power line of the preset working power supply through the coils of the multiple first contactors, the first contacts of the multiple second operating units are used to connect to the positive power line of the preset working power supply, and the second contacts of the multiple second operating units are respectively connected to the negative power line of the preset working power supply through the coils of the multiple second contactors. The present application sets up multiple load units, connects the power supply device to be tested with the load device through the main contacts of the first contactor, and realizes testing of multiple power supply devices to be tested separately. At the same time, by setting the main contacts of the second contactor, the connection between the load devices is realized, so that the size of the load device connected to the power supply device to be tested can be flexibly controlled, the power demand of the power supply device to be tested is met without increasing the load device, and the load heat dissipation efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a load control device provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the structure of an operating unit in a first load control device provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of a second load control device provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of a third load control device provided in an embodiment of the present application;

[0028] Figure 5A schematic diagram of the structure of a fourth load control device provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the structure of a fifth load control device provided in an embodiment of the present application;

[0030] Figure 7 A schematic diagram of the structure of a sixth load control device provided in an embodiment of the present application;

[0031] Figure 8 A schematic diagram of the structure of a seventh load control device provided in an embodiment of the present application;

[0032] Fig. 9 This is a schematic structural diagram of an eighth load control device provided in an embodiment of the present application.

[0033] Icons: power supply device under test-100; input interface-200; first contactor-300; load device-400; second contactor-500; first operating unit-600; second operating unit-700; main contact of the first contactor-301; coil of the first contactor-302; main contact of the second contactor-501; coil of the second contactor-502; load unit-401; positive power line of the preset working power supply-VM+; negative power line of the preset working power supply-VM-; first normally open contact of the first operating unit-SB01UI; second normally open contact of the first operating unit-SB01U2; first normally closed contact of the first operating unit-SB01DI; second normally closed contact of the first operating unit-SB01D2; a group of auxiliary contacts of the first contactor-KM01OF; multi-phase main contact of the first contactor-KM011; first normally open contact of the second operating unit-SB02UI ; The second normally open contact of the second operating unit -SB02U2; The first normally closed contact of the second operating unit -SB02DI; The second normally closed contact of the second operating unit -SB02D2; A group of auxiliary contacts of the second contactor -KM02OF; The multi-phase main contacts of the second contactor -KM021; The single-phase input interface -201; The live wire interface of the single-phase input interface -2011; The neutral wire interface of the single-phase input interface -2012; The single-phase power supply device to be tested -101; The live wire load interface of the single-phase power supply device to be tested -DL; The neutral wire load interface of the single-phase power supply device to be tested -DN; The multi-phase input interface -202; The multi-phase live wire interfaces -2021, 2022 and 2023 of the multi-phase input interface; The neutral wire interface -2021 of the multi-phase input interface; The multi-phase power supply device to be tested -102; The multi-phase live wire load interfaces -U, V and W of the multi-phase power supply device to be tested; The neutral wire load interface -N of the multi-phase power supply device to be tested. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0038] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The load control device in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application.

[0041] Figure 1 A schematic diagram of a load control device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the load control device includes: a plurality of input interfaces 200, a plurality of first contactors 300, a plurality of second contactors 500, a plurality of load devices 400, a plurality of first operating units and a plurality of second operating units (not shown in the figure).

[0042] Among them, multiple input interfaces 200 are respectively used to connect to the load interfaces of multiple power supply devices 100 under test, and the multiple input interfaces 200 are respectively connected to multiple load devices 400 through the main contacts 301 of multiple first contactors, and one load device 400 among two adjacent load devices 400 is connected to another load device 400 through the main contact 501 of a second contactor.

[0043] Among them, the power supply device 100 to be tested can be any power station, and multiple power supply devices 100 to be tested can be the same power station or different power stations, and this application does not limit this. The voltage, frequency, rated power and other data of the power supply device 100 to be tested are known data. The input interface 200 is used to connect the power supply device 100 to be tested and the main contact 301 of the first contactor. The input interface 200 can be any input interface to achieve the connection of any power supply device 100 to be tested. The input interface 200 needs to match the power supply device 100 to be tested. For example, the input interface 200 can be a connector or a bolt nut. The multiple input interfaces 200 in this application can be the same or different. The specific type of the input interface 200 is determined according to the power supply device 100 to be tested, and this embodiment of the application does not limit this. The load device 400 can be determined according to the power supply device 100 to be tested. The multiple load devices 400 in this application can be the same or different, and this embodiment of the application does not limit this. The main contact 302 of the first contactor is used to connect the input interface 200 and the load device 400. When the main contact 302 of the first contactor is turned on, the power supply device 100 to be tested is connected to the load device 400 through the input interface 200 and the main contact 301 of the first contactor. The main contact 501 of the second contactor is used for connection between the load devices 400. When the main contact 501 of the second contactor is turned on, the load device 400 can be connected through the main contact 502 of the second contactor. The number of the power supply device 100 to be tested, the input interface 200, the main contact 301 of the first contactor, and the load device 400 is the same, and the number of the main contact 501 of the second contactor is one less than the number of the main contact 301 of the first contactor.

[0044] Figure 2 This is a schematic diagram of the structure of the operating unit in the first load control device provided in the embodiment of the present application, such as Figure 2 As shown in the above Figure 1On the basis of, the load control device also includes: a first operating unit 600 and a second operating unit 700, the first contacts of the multiple first operating units 600 are used to connect the positive power line VM+ of the preset working power supply, the second contacts of the multiple first operating units 600 are respectively connected to the negative power line VM- of the preset working power supply through the coils 302 of the multiple first contactors, the first contacts of the multiple second operating units 700 are used to connect the positive power line VM+ of the preset working power supply, and the second contacts of the multiple second operating units 700 are respectively connected to the negative power line VM- of the working power supply through the coils 502 of the multiple second contactors.

[0045] The preset working power supply may be a preset DC working power supply or an AC working power supply, which is not limited in the present embodiment. The number of coils 302 of the first operating unit 600 and the first contactor is the same as the number of main contacts of the first contactor, and the number of coils 502 of the second operating unit 700 and the second contactor is the same as the number of main contacts of the second contactor.

[0046] Optionally, the first operating unit 600 and the second operating unit 700 in the present application are used to control the power supply status of the coil 302 of the first contactor and the coil 502 of the second contactor, so as to control the connection and disconnection of the power supply device to be tested and the load device. The first operating unit 600 and the second operating unit 700 in the present application can be operating buttons or operating knobs; the first operating unit 600 and the second operating unit 700 in the present application can also include: a relay, and the relay is also used to connect a preset control unit. The preset control unit can be a device controlled by a remote control unit, and the embodiment of the present application does not limit this.

[0047] An embodiment of the present application provides a load control device, which includes: multiple input interfaces, multiple first contactors, multiple second contactors, multiple load devices, multiple first operating units, and multiple second operating units; wherein the multiple input interfaces are respectively used to connect to the load interfaces of multiple power supply devices to be tested, the multiple input interfaces are respectively connected to the multiple load devices through the main contacts of the multiple first contactors, and one load device in two adjacent load devices is connected to the other load device through the main contact of a second contactor; the first contacts of the multiple first operating units are used to connect to the positive power line of a preset working power supply, the second contacts of the multiple first operating units are respectively connected to the negative power line of the preset working power supply through the coils of the multiple first contactors, the first contacts of the multiple second operating units are used to connect to the positive power line of the preset working power supply, and the second contacts of the multiple second operating units are respectively connected to the negative power line of the preset working power supply through the coils of the multiple second contactors. The present application sets up multiple load units, connects the power supply device to be tested with the load device through the main contacts of the first contactor, and realizes testing of multiple different power supply devices to be tested. At the same time, by setting the main contacts of the second contactor, the connection between the load devices is realized, so that the size of the load device connected to the power supply device to be tested can be flexibly controlled, and the load requirements of different power stations can be met without setting up additional load devices, and the load heat dissipation efficiency can be improved.

[0048] Based on the above embodiment, the present application also provides a second load control device, Figure 3 A schematic diagram of the structure of a second load control device provided in an embodiment of the present application is shown in FIG. Figure 3 As shown above Figure 2 Taking a first operating unit 600 and a coil 302 of a first contactor as an example, a first normally open contact SB01UI of a first operating unit 600 in the load control device is used to connect to a positive power line VM+ of a preset working power supply, a second normally open contact SB01UI of the first operating unit 600 is connected to a first normally closed contact SB01D1 of the first operating unit 600, and a second normally closed contact SB01D2 of the first operating unit 600 is connected to a negative power line VM- of a preset working power supply through a coil 302 of a first contactor.

[0049] Among them, the first normally open contact SB01UI and the second normally open contact SB01UI of the first contactor are used to control the start-up of the first operating unit 600. When the first normally open contact SB01UI and the second normally open contact SB01UI of the first contactor are closed, the coil 302 of the first contactor of the first operating unit 600 is connected to the positive power line VM+ of the preset working power supply through the first normally open contact SB01UI, the second normally open contact SB01UI, the first normally closed contact SB01D1 and the second normally closed contact SB01D2 of the first contactor, thereby controlling the main contacts of the first contactor to close, so that the power supply device to be tested is connected through the input interface and the first The main contacts of the contactor are connected to the load device, thereby realizing the test of the power supply device to be tested; the first normally closed contact SB01D1 and the second normally closed contact SB01D2 of the first contactor are used to control the stop of the first operating unit 600. When the first operating unit 600 is started, the first normally closed contact SB01D1 and the second normally closed contact SB01D2 of the first contactor are disconnected, and the coil 302 of the first contactor cannot be connected to the positive power line VM+ of the preset working power supply. At this time, the main contacts of the first contactor are disconnected, so that the power supply device to be tested cannot be connected to the load device through the input interface and the main contacts of the first contactor, thereby stopping the test of the power supply device to be tested.

[0050] In the embodiment of the present application, by setting the first normally open contact, the second normally open contact, the first normally closed contact and the second normally closed contact of the first contactor in the first operating unit, the first normally open contact and the second normally open contact of the first contactor can be used to control the closing of the main contacts of the first contactor, and the first normally closed contact and the second normally closed contact of the first contactor can be used to control the opening of the main contacts of the first contactor, thereby improving the control flexibility of the load control device.

[0051] Based on the above embodiments, the present application also provides a third load control device, Figure 4 A schematic diagram of the structure of a third load control device provided in an embodiment of the present application is shown in FIG. Figure 4 As shown in the above Figure 3 On the basis of this, a group of auxiliary contacts KM01OF of a first contactor is connected in parallel to both ends of a first normally open contact SB01UI of a first operating unit 600 and a second normally open contact SB01UI of the first operating unit 600 in the load control device.

[0052] Among them, a group of auxiliary contacts KM01OF of the first contactor is closed when the coil 302 of the first contactor is energized. When the first normally open contact SB01UI of the first operating unit 600 and the second normally open contact SB01UI of the first operating unit 600 are closed, a group of auxiliary contacts KM01OF of the first contactor are also closed. When the first normally open contact SB01UI of the first operating unit 600 and the second normally open contact SB01UI of the first operating unit 600 are disconnected, the coil 302 of the first contactor can be connected to the positive power line VM+ of the preset working power supply through a group of auxiliary contacts KM01OF of the first contactor, the first normally closed contact SB01D1 of the first operating unit 600 and the second normally closed contact SB01D2 of the first operating unit 600, so that the main contacts of the first contactor are continuously closed.

[0053] The present application sets a group of auxiliary contacts of the first contactor to ensure that after the first normally open contact and the second normally open contact of the first contactor are closed, the group of auxiliary contacts of the first contactor are closed, thereby ensuring that the main contacts of the first contactor are continuously closed, thereby realizing flexible control of the load control device, and there is no need to continuously control the first normally open contact and the second normally open contact of the first contactor, thereby saving manpower and material resources.

[0054] Based on the above embodiments, the present application also provides a fourth load control device, Figure 5 A schematic diagram of the structure of a fourth load control device provided in an embodiment of the present application is shown in FIG. Figure 5 As shown above Figure 2 Taking a second operating unit 700 and a coil 502 of a second contactor as an example, a first normally open contact SB02UI of a second operating unit 700 in the load control device is used to connect the positive power line VM+ of the preset working power supply, a second normally open contact SB02U2 of the second operating unit 700 is connected to a first normally closed contact SB02D1 of the second operating unit 700, and a second normally closed contact SB02D1 of the second operating unit 700 is connected to the negative power line VM- of the preset working power supply through the coil 502 of the second contactor.

[0055] Among them, the first normally open contact SB02UI and the second normally open contact SB02UI of the second operating unit 700 are used to control the startup of the second operating unit 700. When the first normally open contact SB02UI and the second normally open contact SB02UI of the second contactor are closed, the coil 502 of the second contactor in the second operating unit 700 is connected to the positive power line VM+ of the preset working power supply through the first normally open contact SB02UI, the second normally open contact SB02UI, the first normally closed contact SB02D1 and the second normally closed contact SB02D2 of the second contactor, thereby controlling the main contact of the second contactor to close, so that the power supply device to be tested is connected to the load device through the input interface and the main contact of the first contactor, and at the same time through the second contactor The main contacts are connected to other load devices, thereby achieving a higher power test on the power supply device to be tested; the first normally closed contact SB02D1 and the second normally closed contact SB02D2 of the second contactor are used to control the stop of the second operating unit 700. When the second operating unit 700 is started, the first normally closed contact SB02D1 and the second normally closed contact SB02D2 of the second contactor are disconnected, and the coil 502 of the second contactor cannot be connected to the positive power line VM+ of the preset working power supply. At this time, the main contacts of the second contactor are disconnected, so that the power supply device to be tested is connected to the load device through the input interface and the main contacts of the first contactor, while it cannot be connected to other load devices through the main contacts of the second contactor, thereby reducing the test power of the power supply device to be tested.

[0056] By setting a first normally open contact, a second normally open contact, a first normally closed contact and a second normally closed contact in the second operating unit, the embodiment of the present application can control the closing of the main contacts of the second contactor through multiple first normally open contacts and second normally open contacts, and control the opening of the main contacts of the second contactor through the first normally closed contact and the second normally closed contact, thereby improving the flexibility of control over the load control device.

[0057] Based on the above embodiments, the present application also provides a fifth load control device, Figure 6 A schematic diagram of the structure of a fifth load control device provided in an embodiment of the present application is shown in FIG. Figure 6 As shown in the above Figure 5 On the basis of this, two ends of the first normally open contact SB02UI and the second normally open contact SB02U2 of a second operating unit 700 in the load control device are connected in parallel with a group of auxiliary contacts KM02OF of a second contactor.

[0058] Among them, a group of auxiliary contacts KM02OF of the second contactor are closed when the coil 502 of the second contactor is energized. When the first normally open contact SB02UI and the second normally open contact SB02U2 of the second operating unit 700 are closed, a group of auxiliary contacts KM02OF of the second contactor are also closed. When the first normally open contact SB02UI and the second normally open contact SB02U2 of the second operating unit 700 are disconnected, the coil of the second contactor can be connected to the positive power line of the preset working power supply through a group of auxiliary contacts KM02OF of the second contactor, the first normally closed contact SB02D1 of the second operating unit 700 and the second normally closed contact SB02D2 of the second operating unit 700, so that the main contacts of the second contactor are continuously closed.

[0059] The present application provides a group of auxiliary contacts of the second contactor to ensure that after the first normally open contact and the second normally open contact are closed, the group of auxiliary contacts of the second contactor are closed, thereby achieving continuous closure of the main contacts of the second contactor, achieving flexible control of the load control device, and eliminating the need to continuously control the first normally open contact and the second normally open contact of the second contactor, thereby saving manpower and material resources.

[0060] Based on the above embodiments, the present application also provides a sixth load control device, Figure 7 A schematic diagram of the structure of a sixth load control device provided in an embodiment of the present application is shown in FIG. Figure 7 As shown above Figure 1 Taking a power supply device 100 to be tested, an input interface 200, a main contact 303 of a first relay and a load device 400 as an example, the multiple input interfaces 200 in the load control device include: a single-phase input interface 201, a live wire interface 2011 of the single-phase input interface is used to connect to a live wire load interface DL of the single-phase power supply device to be tested, and a neutral wire interface 2012 of the single-phase input interface is used to connect to a neutral wire load interface DN of the single-phase power supply device to be tested;

[0061] The live wire interface 2011 of the single-phase input interface is respectively connected to a plurality of load units 401 in a load device 400 through a multi-phase main contact KM011 of a first contactor.

[0062] The single-phase power supply device 101 can be a single-phase power frequency (230V, 50Hz) power station, a single-phase medium frequency (230V, 400Hz) power station or any other single-phase power supply. When the single-phase power supply device 101 is a single-phase power frequency (230V, 50Hz) power station, the live line load interface DL of the single-phase power supply device 101 is 50DL, and the neutral line load interface DN of the single-phase power supply device to be tested is 50DN; when the single-phase power supply device 101 is a single-phase medium frequency (230V, 400Hz) power station, the live line load interface DL of the single-phase power supply device 101 is 4000DL, and the neutral line load interface DN of the single-phase power supply device to be tested is 400DN. At this time, the single-phase input interface 201 has a live wire interface 2011, the single-phase input interface has a neutral wire interface 2012, the multi-phase main contact KM011 of the first contactor is a plurality of contacts in the main contact 301 of the first contactor, and the load unit 401 can be a resistor or other electrical equipment, which is not limited in the embodiment of the present application.

[0063] Based on the above embodiments, the present application also provides a seventh load control device, Figure 8 A schematic diagram of the structure of a seventh load control device provided in an embodiment of the present application is shown in FIG. Figure 8 As shown above Figure 1 Taking a power supply device 100 to be tested, an input interface 200, a main contact 303 of a first relay and a load device 400 as an example, the multiple input interfaces 200 in the load control device include: a multi-phase input interface 202, multi-phase live wire interfaces 2021, 2022 and 2023 of the multi-phase input interface are respectively used to connect to multi-phase live wire load interfaces U, V and W of the multi-phase power supply device to be tested, and a neutral wire interface 2021 of the multi-phase input interface is used to connect to a neutral wire load interface N of the multi-phase power supply device to be tested;

[0064] The live wire interfaces 2021 , 2022 and 2023 of the multi-phase input interface are respectively connected to a plurality of load units 401 in a load device 400 through a multi-phase main contact KM011 of a first contactor.

[0065] The multi-phase power supply device 102 can be a three-phase power frequency (400V, 50Hz) power station, a three-phase medium frequency (230V, 400Hz) power station or any other multi-phase power supply. When the multi-phase power supply device 102 is a three-phase power frequency (400V, 50Hz) power station, the live line load interfaces U, V and W of the multi-phase power supply device 102 are 50U, 50V and 50W, and the neutral line load interface N of the multi-phase power supply device 102 is 50N; when the multi-phase power supply device 102 is a three-phase medium frequency (230V, 400Hz) power station, the live line load interfaces U, V and W of the multi-phase power supply device 102 are 400U, 400V and 400W, and the neutral line load interface N of the single-phase power supply device to be tested is 400N. At this time, the single-phase input interface 201 has three live wire interfaces 2021, 2022 and 2023, and the single-phase input interface has a neutral wire interface 2024. The multi-phase main contact KM011 of the first contactor is a plurality of contacts in the main contact 301 of the first contactor. The load unit 401 can be a resistor or other electrical equipment, and the embodiment of the present application does not limit this.

[0066] By way of example, the load control device provided in the embodiment of the present application is described as a whole. Fig. 9 A schematic diagram of the structure of an eighth load control device provided in an embodiment of the present application is shown in FIG. Fig. 9 As shown, the dots in the figure are nodes with connection relationships in the load control device. When the power sources to be tested are a single-phase power frequency (230V, 50Hz) power station, a single-phase medium frequency (230V, 400Hz), a three-phase power frequency (400V, 50Hz) power station, and a three-phase medium frequency (230V, 400Hz) power station, the control order of the first operating unit 600 is to control the single-phase power frequency (230V, 50Hz) power station, the single-phase medium frequency (230V, 400Hz) power station, and the three-phase medium frequency (230V, 400Hz) power station from top to bottom. 00Hz), three-phase industrial frequency (400V, 50Hz) power station and three-phase medium frequency (230V, 400Hz) power station, the second operating unit 700 controls the connection of the load device 400 between the single-phase industrial frequency (230V, 50Hz) power station, the single-phase medium frequency (230V, 400Hz), the three-phase industrial frequency (400V, 50Hz) power station and the three-phase medium frequency (230V, 400Hz) power station from top to bottom.

[0067] This application takes a single-phase power frequency (230V, 50Hz) power station as an example to illustrate the working process of the load control device. The working process of the remaining power supplies 100 to be tested is the same as that of the single-phase power frequency (230V, 50Hz) power station. It is only necessary to control the corresponding first control unit 600 and the second operating unit 700. Fig. 9As shown, when the first normally open contact SB01U1 and the second normally open contact SB01U2 in the first first operating unit 600 are connected, the multi-phase main contact KM011 of the first contactor in the main contact 301 of the first relay is closed. Since the coil 301 of the first contactor and the main contact 302 of the first contactor are different parts of the same relay, at this time, the live line load interface 50DL in the single-phase power frequency (230V, 50Hz) power station is connected to the multiple load units 401 of the load device 400 through the live line interface 2011 and the multi-phase main contact KM011 of the first contactor, and the neutral line load interface 50DN in the single-phase power frequency (230V, 50Hz) power station is connected to the multiple load units 401 of the load device 400 through the neutral line interface 2012 and the multi-phase main contact KM011 of the first contactor.

[0068] When the load device 400 cannot meet the power demand of the single-phase power frequency (230V, 50Hz) power station, the coil 502 of the second contactor is energized by sequentially controlling one or more second operating units 700. Since the coil 502 of the second contactor and the main contact 502 of the second contactor are different parts of the same relay, at this time, the multi-phase main contact KM021 of the second contactor in the main contact 502 of one or more second contactors is sequentially turned on, so that the multiple load units 401 in the load device 400 are connected in parallel, thereby meeting the power demand of the single-phase power frequency (230V, 50Hz) power station.

[0069] Optionally, the above-mentioned load control device of the present application also includes a miniature circuit breaker, which is connected in series at both ends of the positive power line of the preset working power supply. When any circuit component in the load control device is short-circuited, so that the current in the circuit of the first operating unit and the second operating unit in the load control device is greater than the short-circuit current of the miniature circuit breaker, the miniature circuit breaker is disconnected to protect the load control device.

[0070] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0071] It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A load control device, characterized in that: The load control device comprises: a plurality of input interfaces, a plurality of first contactors, a plurality of second contactors, a plurality of load devices, a plurality of first operating units, and a plurality of second operating units; The multiple input interfaces are respectively used to connect to the load interfaces of the multiple power supply devices to be tested, the multiple input interfaces are respectively connected to the multiple load devices through the main contacts of the multiple first contactors, and one load device of two adjacent load devices is connected to the other load device through the main contact of a second contactor; The first contacts of the multiple first operating units are used to connect the positive power line of the preset working power supply, and the second contacts of the multiple first operating units are respectively connected to the negative power line of the preset working power supply through the coils of the multiple first contactors. The first contacts of the multiple second operating units are used to connect the positive power line of the preset working power supply, and the second contacts of the multiple second operating units are respectively connected to the negative power line of the preset working power supply through the coils of the multiple second contactors.

2. The load control device according to claim 1, characterized in that: The first normally open contact of a first operating unit is used to connect the positive power line of the preset working power supply, the second normally open contact of the first operating unit is connected to the first normally closed contact of the first operating unit, and the second normally closed contact of the first operating unit is connected to the negative power line of the preset working power supply through the coil of a first contactor.

3. The load control device according to claim 2, characterized in that A group of auxiliary contacts of the first contactor are connected in parallel to both ends of the first normally open contact and the second normally open contact of the first operating unit.

4. The load control device according to claim 1, characterized in that: The first normally open contact of a second operating unit is used to connect the positive power line of the preset working power supply, the second normally open contact of the second operating unit is connected to the first normally closed contact of the second operating unit, and the second normally closed contact of the second operating unit is connected to the negative power line of the preset working power supply through the coil of a second contactor.

5. The load control device according to claim 4, characterized in that: A group of auxiliary contacts of the second contactor are connected in parallel to both ends of the first normally open contact and the second normally open contact of the second operating unit.

6. The load control device according to claim 1, characterized in that: The multiple input interfaces include: a single-phase input interface, a live wire interface of the single-phase input interface is used to connect to a live wire load interface of a single-phase power supply device to be tested, and a neutral wire interface of the single-phase input interface is used to connect to a neutral wire load interface of the single-phase power supply device to be tested; The live wire interfaces of the single-phase input interface are respectively connected to a plurality of load units in a load device through a multi-phase main contact of a first contactor.

7. The load control device according to claim 1, characterized in that: The multiple input interfaces include: a multi-phase input interface, a multi-phase live wire interface of the multi-phase input interface is used to connect to a multi-phase live wire load interface of a multi-phase power supply device to be tested, and a neutral wire interface of the multi-phase input interface is used to connect to a neutral wire load interface of the multi-phase power supply device to be tested; The live wire interfaces of the multi-phase input interface are respectively connected to a plurality of load units in a load device through the multi-phase main contacts of a first contactor.

8. The load control device according to claim 1, characterized in that: The first operating unit and the second operating unit are operating buttons or operating knobs.

9. The load control device according to claim 1, characterized in that: The first operating unit and the second operating unit respectively include: a relay, and the relay is also used to connect to a preset control unit.

10. The load control device according to claim 1, characterized in that: The preset working power supply is a preset DC working power supply or an AC working power supply.

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