Circuit breaker simulation device

Abstract

The utility model relates to the technical field of circuit breaker simulation, and discloses a circuit breaker simulation device, which comprises a first opening and closing electromagnet, a second opening and closing electromagnet, an auxiliary switch, a time relay and a signal connector, in actual use, switching-on and switching-off signals of a terminal are connected to the device through the signal connector, and feedback signals for verifying whether the switching-on and switching-off signals are correct or not are also connected out from the signal connector. When opening and closing signals are input into the device, the state of a switch channel of the auxiliary switch is changed through the action of the first opening and closing electromagnet and the second opening and closing electromagnet, and then the on-off of a coil power supply of the time relay is controlled. And finally, corresponding opening and closing feedback signals are output through a switch channel of the auxiliary switch and a normally-open switch of the time relay, so that whether the opening and closing signals are accurate or not can be verified, and finally, an opening and closing test can be carried out when the circuit breaker is not used.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker simulation, in particular to a circuit breaker simulation device. Background Art

[0002] In a power system, when a power device fails, such as a short circuit, overload or low fault occurs, a large current and high temperature will be generated, which may burn out the device and even cause accidents. To achieve overcurrent and over-temperature protection, a vacuum circuit breaker is set in the power system to quickly cut off the circuit and prevent the continuous flow of fault current.

[0003] During the test process of the power system, a closing and opening test needs to be carried out. In the closing and opening test, it is necessary to verify whether the closing and opening signals sent by the terminal are correct and whether the functions are perfect. In the closing and opening test, if a real circuit breaker is used for the closing and opening test, the following problems exist:

[0004] First: Frequent closing and opening tests on the circuit breaker may have a certain impact on the healthy operation state of the circuit breaker. For example, it will increase the wear of the circuit breaker and shorten its service life;

[0005] Second: During the closing and opening test process, long-term operation on the circuit breaker may affect the normal progress of other work;

[0006] Third: Using a real circuit breaker for testing, especially in a high-voltage power system, may have safety risks such as electric shock and fire;

[0007] Fourth: Using a real circuit breaker for the closing and opening test will involve links such as equipment transportation, installation and debugging, and a large amount of human and material resources need to be invested, increasing the operating cost of the enterprise. Content of the Utility Model

[0008] In view of the deficiencies of the background art, the utility model provides a circuit breaker simulation device, and the problem to be solved is that when using a circuit breaker to verify whether the closing and opening signals sent by the terminal are correct during the closing and opening test, there are problems such as affecting the performance of the circuit breaker, affecting the progress of other work, having safety defects and high test costs.

[0009] To solve the above technical problems, the utility model provides the following technical solution: A circuit breaker simulation device includes a first closing and opening electromagnet, a second closing and opening electromagnet, an auxiliary switch, a time relay and a signal connector;

[0010] The operating end of the auxiliary switch is connected with a cross bar, and the telescopic ends of the first closing and opening electromagnet and the second closing and opening electromagnet are respectively arranged corresponding to both ends of the cross bar, and are used for driving the cross bar to rotate when telescoping;

[0011] The signal connector includes a V+ terminal, a V- terminal, an FZ terminal, an HZ terminal, a COM terminal, a YXCOM terminal, an FW terminal, an HW terminal, and a CN terminal;

[0012] The V+ terminal is electrically connected to one end of the first normally closed switch of the auxiliary switch. The other end of the first normally closed switch is electrically connected to one end of the coil of the time relay. The other end of the coil of the time relay is electrically connected to the V- terminal;

[0013] The FZ terminal is electrically connected to one end of the first normally open switch of the auxiliary switch. The other end of the first normally open switch is electrically connected to one end of the coil of the first closing and opening electromagnet. The other end of the coil of the first closing and opening electromagnet is electrically connected to the COM terminal;

[0014] The HZ terminal is electrically connected to one end of the second normally closed switch of the auxiliary switch. The other end of the second normally closed switch is electrically connected to one end of the coil of the second closing and opening electromagnet. The other end of the coil of the second closing and opening electromagnet is electrically connected to the COM terminal;

[0015] The YXCOM terminal is electrically connected to one end of the third normally closed switch of the auxiliary switch, one end of the second normally open switch of the auxiliary switch, and one end of the normally open switch of the time relay respectively. The other end of the third normally closed switch is electrically connected to the FW terminal. The other end of the second normally open switch is electrically connected to the HW terminal. The other end of the normally open switch of the time relay is electrically connected to the CN terminal.

[0016] In a certain embodiment, the present utility model further includes an intermediate relay. One end of the coil of the intermediate relay is electrically connected to one end of the third normally open switch of the auxiliary switch. The other end of the third normally open switch is electrically connected to the V+ terminal. The other end of the coil of the intermediate relay is electrically connected to the V- terminal;

[0017] One ends of the three normally open switches of the intermediate relay are used for inputting three-phase power supply, and the other ends of the three normally open switches of the intermediate relay are used for outputting three-phase power supply.

[0018] In a certain embodiment, the present utility model further includes a rectangular parallelepiped-shaped fixed box. A first cavity and a second cavity are sequentially arranged in the fixed box along the length direction of the fixed box;

[0019] The auxiliary switch is installed on the right side wall of the first cavity. The first closing and opening electromagnet and the second closing and opening electromagnet are arranged up and down in the first cavity and are located on the left side of the auxiliary switch;

[0020] The time relay and the intermediate relay are arranged in the second cavity.

[0021] In some embodiments, a first rotating rod is provided on the rear side wall of the fixed box. The outer end of the first rotating rod is connected to a rotating handle, and the inner end of the first rotating rod is connected to a vertical rod. The vertical rod is located on the left side of the first closing and opening electromagnet and the second closing and opening electromagnet. The two ends of the vertical rod are correspondingly arranged with the telescopic ends of the first closing and opening electromagnet and the second closing and opening electromagnet.

[0022] In some embodiments, the operating end of the auxiliary switch is further connected to an extension rod. The extension rod passes through the rear side wall of the fixed box. An indicating needle and a nut are provided on the part of the extension rod passing through the fixed box. The nut is screwed onto the extension rod for pressing the indicating needle against the rear side wall of the fixed box. An indicating plate for indicating the opening and closing state is provided on the rear side wall of the fixed box on the right side of the indicating needle.

[0023] In some embodiments, three first terminal posts are installed on the top surface of the fixed box, and a support frame is installed on the front side surface of the fixed box. Three second terminal posts are provided on the support frame. One end of each of the three normally open switches of the intermediate relay is electrically connected to the three first terminal posts through wires, and the other ends of the three normally open switches of the intermediate relay are electrically connected to the three second terminal posts through wires. Current transformers are respectively provided on the connection lines between each first terminal post and the corresponding second terminal post.

[0024] The beneficial effects of the present utility model compared with the prior art are as follows: During actual use, the closing and opening signals of the terminal are connected to the present utility model through the signal connector, and the feedback signal for verifying whether the closing and opening signals are correct is also taken out from the signal connector. When the closing and opening signals are input into the present utility model, the state of the switch channel of the auxiliary switch is changed through the action of the first closing and opening electromagnet and the second closing and opening electromagnet, thereby controlling the on-off of the coil power supply of the time relay. Finally, the corresponding closing and opening feedback signals are output through the switch channel of the auxiliary switch and the normally open switch of the time relay, so as to verify whether the closing and opening signals are accurate, and finally a closing and opening test can be carried out without using a circuit breaker. Description of the Drawings

[0025] Figure 1 Schematic connection diagram of the first closing and opening electromagnet, the second closing and opening electromagnet, the auxiliary switch, the time relay, the intermediate relay and the signal connector in the embodiment;

[0026] Figure 2 Schematic installation diagram of the first closing and opening electromagnet, the second closing and opening electromagnet and the auxiliary switch in the embodiment;

[0027] Figure 3 Schematic diagram of the fixed box and the three first terminal posts in the embodiment;

[0028] Figure 4Schematic diagram of the support frame and three second terminal posts in the embodiment. Detailed implementation manners

[0029] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0030] As Figure 1-2 shown, a circuit breaker simulation device includes a first closing and opening electromagnet 1, a second closing and opening electromagnet 2, an auxiliary switch 3, a time relay KT, and a signal connector.

[0031] The operating end 30 of the auxiliary switch 3 is connected with a cross bar 31. The telescopic ends of the first closing and opening electromagnet 1 and the second closing and opening electromagnet 2 are respectively arranged corresponding to the two ends of the cross bar 31, and are used to drive the cross bar 31 to rotate when telescoping.

[0032] The signal connector includes a V+ terminal, a V- terminal, an FZ terminal, an HZ terminal, a COM terminal, a YXCOM terminal, an FW terminal, an HW terminal, and a CN terminal.

[0033] The V+ terminal is electrically connected to one end of the first normally closed switch S10 of the auxiliary switch 3. The other end of the first normally closed switch S10 is electrically connected to one end of the coil of the time relay KT. The other end of the coil of the time relay KT is electrically connected to the V- terminal.

[0034] The FZ terminal is electrically connected to one end of the first normally open switch S20 of the auxiliary switch 3. The other end of the first normally open switch S20 is electrically connected to one end of the coil TQ of the first closing and opening electromagnet 1. The other end of the coil TQ of the first closing and opening electromagnet 1 is electrically connected to the COM terminal.

[0035] The HZ terminal is electrically connected to one end of the second normally closed switch S11 of the auxiliary switch 3. The other end of the second normally closed switch S11 is electrically connected to one end of the coil HQ of the second closing and opening electromagnet 2. The other end of the coil HQ of the second closing and opening electromagnet is electrically connected to the COM terminal.

[0036] The YXCOM terminal is respectively electrically connected to one end of the third normally closed switch S12 of the auxiliary switch 3, one end of the second normally open switch S21 of the auxiliary switch 2, and one end of the normally open switch of the time relay KT. The other end of the third normally closed switch S12 is electrically connected to the FW terminal. The other end of the second normally open switch S21 is electrically connected to the HW terminal. The other end of the normally open switch of the time relay KT is electrically connected to the CN terminal.

[0037] Specifically, in this embodiment, the signal connector is an aviation plug. The V+ terminal and the V- terminal are used to connect to the power supply. The FZ terminal is used to connect to the opening signal. The HZ terminal is used to connect to the closing signal. The FW terminal is used to output the opening feedback signal. The HW terminal is used to output the closing feedback signal. The CN terminal is used to output the energy storage feedback signal.

[0038] During actual use, the test process of the present utility model is as follows:

[0039] When closing, a closing signal of a switch quantity is input to the HZ terminal. This closing signal drives the coil HQ to be energized, thereby causing the second opening and closing electromagnet 2 to act, disconnecting the normally closed switch of the auxiliary switch 3, and making the normally open switch of the auxiliary switch 3 conduct. At this time, the first normally open switch S20 conducts, the second normally open switch S21 conducts, the HW terminal is electrically connected to the YXCOM terminal, and outputs a closing feedback signal;

[0040] When conducting an opening test after closing, a switch quantity opening signal is input to the FZ terminal. This opening signal drives the coil TQ of the first opening and closing electromagnet 1 to be energized, thereby causing the first opening and closing electromagnet 1 to act, making the normally closed switch of the auxiliary switch 3 conduct, and turning off the normally open switch of the auxiliary switch. At this time, the first normally closed switch S10 conducts, the third normally closed switch S12 conducts, the FW terminal is connected to the YXCOM terminal, and outputs an opening feedback signal; at the same time, the coil of the time relay KT is energized. After the delay time arrives, the normally open switch of the time relay KT conducts, the CN terminal is connected to the YXCOM terminal, and outputs an energy storage signal, thus completing the test of the opening and closing signals.

[0041] Specifically, in this embodiment, the present utility model further includes an intermediate relay KA. One end of the coil of the intermediate relay KA is electrically connected to one end of the third normally open switch S22 of the auxiliary switch 3. The other end of the third normally open switch S22 is electrically connected to the V+ terminal. The other end of the coil of the intermediate relay KA is electrically connected to the V- terminal;

[0042] One end of the three normally open switches of the intermediate relay KA is used to input a three-phase power supply, and the other end of the three normally open switches of the intermediate relay is used to output a three-phase power supply.

[0043] During actual use, when the coil TQ of the first opening and closing electromagnet 1 is energized, the third normally open switch S22 conducts, the coil of the intermediate relay KA is energized, and the normally open switch channel of the intermediate relay KA, thereby realizing the simulation of the access of the three-phase power supply.

[0044] Specifically, in this embodiment, as Figure 3 shown, the present utility model further includes a rectangular parallelepiped-shaped fixed box 4. Inside the fixed box 4, a first cavity 40 and a second cavity 41 are sequentially arranged along the length direction of the fixed box 4;

[0045] The auxiliary switch 3 is installed on the right side wall 400 of the first cavity 40. The first closing and opening electromagnet 1 and the second closing and opening electromagnet 2 are arranged vertically in the first cavity 40 and are located on the left side of the auxiliary switch 3.

[0046] The time relay KT and the intermediate relay KA are arranged in the second cavity 41.

[0047] Specifically, in this embodiment, since the auxiliary switch 3 is relatively large in size, in order to facilitate the fixing of the auxiliary switch 3 during testing and enable the first closing and opening electromagnet 1 and the second closing and opening electromagnet 2 to control the auxiliary switch 3, the interior of the fixing box 4 is divided into two cavities.

[0048] Specifically, in this embodiment, a jack 42 is provided on the left side surface of the fixing box 4, and the signal connector is installed in the jack 42.

[0049] Specifically, in this embodiment, in order to realize the manual operation of the auxiliary switch, a first rotating rod 5 is provided on the rear side wall of the fixing box 4. The outer end of the first rotating rod 5 is connected with a rotating handle 50, and the inner end of the first rotating rod 5 is connected with a vertical rod. The vertical rod is located on the left side of the first closing and opening electromagnet 1 and the second closing and opening electromagnet 2, and the two ends of the vertical rod are correspondingly arranged with the telescopic ends of the first closing and opening electromagnet 1 and the second closing and opening electromagnet 2.

[0050] During actual use, by rotating the rotating handle 50, the vertical rod can be driven to rotate, and the vertical rotation will drive the telescopic ends of the closing and opening electromagnets to rotate, thereby realizing the manual control of the auxiliary switch. Specifically, the telescopic control of the telescopic ends of the first closing and opening electromagnet 1 and the second closing and opening electromagnet 2 can be realized by controlling the forward and reverse rotation of the vertical rod.

[0051] Specifically, in this embodiment, in order to facilitate observing the closing and opening process, an extension rod 32 is also connected to the operating end 30 of the auxiliary switch 3. The extension rod 32 passes through the rear side wall of the fixing box 4. An indicating needle 33 and a nut are provided on the part of the extension rod 32 passing through the fixing box. The nut is screwed on the extension rod 32 and is used to press the indicating needle 33 against the rear side wall of the fixing box 4. An indicating plate 34 for indicating the opening and closing state is provided on the rear side wall of the fixing box 4 on the right side of the indicating needle 33.

[0052] During actual use, when the operating end 30 of the auxiliary switch 3 moves, the operating end 30 will simultaneously drive the indicating needle 33 to rotate, so that the indicating needle 33 points to different areas of the indicating plate 34, thereby indicating whether it is in the closing test state or the opening test state.

[0053] It should be noted that although Figure 3 the nut is not marked, for those skilled in the art, screwing the nut on the extension rod 32 and pressing the indicating needle 33 against the rear side wall of the fixing box 4 is a prior art solution.

[0054] Specifically, in this embodiment, three first terminal blocks 6 are installed on the top surface of the fixed box 4, and a support frame 7 as shown in Figure 4 the figure is installed on the front side surface of the fixed box 4. Three second terminal blocks 8 are provided on the support frame 7. One end of the three normally open switches of each intermediate relay KA is electrically connected to each first terminal block 6 through a wire, and the other ends of the normally open switches of the three intermediate relays KA are electrically connected to the three second terminal blocks 8 through a wire. Current transformers are respectively provided on the connection lines between each first terminal block 6 and the corresponding second terminal block 8.

[0055] It should be noted that although the current transformers are not marked in the drawings, for those skilled in the art, it is a common means in the art to set current transformers on the connection lines.

[0056] In summary, during actual use, the opening and closing signals of the terminal are connected to the present utility model through the signal connector, and the feedback signal for verifying whether the opening and closing signals are correct is also output from the signal connector; when the opening and closing signals are input into the present utility model, the state of the switch channel of the auxiliary switch 3 is changed through the actions of the first opening and closing electromagnet 1 and the second opening and closing electromagnet 2, thereby controlling the on-off of the coil power supply of the time relay KT. Finally, the corresponding opening and closing feedback signals are output through the switch channel of the auxiliary switch 3 and the normally open switch of the time relay KT, so as to verify whether the opening and closing signals are accurate, and ultimately an opening and closing test can be carried out without using a circuit breaker.

[0057] Based on the inspiration of the present utility model, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A circuit breaker simulation device, characterized in that: It includes a first opening and closing electromagnet, a second opening and closing electromagnet, an auxiliary switch, a time relay and a signal connector; The operating end of the auxiliary switch is connected to a cross bar, and the telescopic end of the first opening and closing electromagnet and the telescopic end of the second opening and closing electromagnet are respectively arranged corresponding to the two ends of the cross bar, so as to drive the cross bar to rotate when extending and retracting; The signal connector includes a V+ terminal, a V- terminal, an FZ terminal, an HZ terminal, a COM terminal, a YXCOM terminal, a FW terminal, a HW terminal and a CN terminal; The V+ terminal is electrically connected to one end of the first normally closed switch of the auxiliary switch, the other end of the first normally closed switch is electrically connected to one end of the coil of the time relay, and the other end of the coil of the time relay is electrically connected to the V- terminal; The FZ terminal is electrically connected to one end of the first normally open switch of the auxiliary switch, the other end of the first normally open switch is electrically connected to one end of the coil of the first opening and closing electromagnet, and the other end of the coil of the first opening and closing electromagnet is electrically connected to the COM terminal; The HZ terminal is electrically connected to one end of the second normally closed switch of the auxiliary switch, the other end of the second normally closed switch is electrically connected to one end of the coil of the second opening and closing electromagnet, and the other end of the coil of the second opening and closing electromagnet is electrically connected to the COM terminal; The YXCOM terminal is electrically connected to one end of the third normally closed switch of the auxiliary switch, one end of the second normally open switch of the auxiliary switch and one end of the normally open switch of the time relay, respectively; the other end of the third normally closed switch is electrically connected to the FW terminal; the other end of the second normally open switch is electrically connected to the HW terminal; the other end of the normally open switch of the time relay is electrically connected to the CN terminal.

2. A circuit breaker simulation device according to claim 1, characterized in that: It also includes an intermediate relay, one end of the coil of the intermediate relay is electrically connected to one end of the third normally open switch of the auxiliary switch, the other end of the third normally open switch is electrically connected to the V+ end, and the other end of the coil of the intermediate relay is electrically connected to the V- end; One end of the three normally open switches of the intermediate relay is used for inputting a three-phase power supply, and the other end of the three normally open switches of the intermediate relay is used for outputting a three-phase power supply.

3. A circuit breaker simulation device according to claim 2, characterized in that: It also includes a rectangular fixed box, in which a first cavity and a second cavity are sequentially arranged along the length direction of the fixed box; The auxiliary switch is installed on the right side wall of the first cavity, and the first opening and closing electromagnet and the second opening and closing electromagnet are arranged in the first cavity from top to bottom and located on the left side of the auxiliary switch; The time relay and the intermediate relay are arranged in the second cavity.

4. A circuit breaker simulation device according to claim 3, characterized in that: A first rotating rod is provided on the rear side wall of the fixed box, the outer end of the first rotating rod is connected to a rotating handle, the inner end of the first rotating rod is connected to a vertical rod, the vertical rod is located on the left side of the first opening and closing electromagnet and the second opening and closing electromagnet, and the two ends of the vertical rod are correspondingly arranged with the telescopic end of the first opening and closing electromagnet and the telescopic end of the second opening and closing electromagnet.

5. A circuit breaker simulation device according to claim 4, characterized in that: The operating end of the auxiliary switch is also connected to an extension rod, which passes through the rear side wall of the fixed box. An indicator needle and a nut are provided on the part of the extension rod passing through the fixed box. The nut is screwed on the extension rod and is used to press the indicator needle against the rear side wall of the fixed box. An indicator sign indicating the opening and closing status is provided on the rear side wall of the fixed box on the right side of the indicator needle.

6. A circuit breaker simulation device according to claim 3, characterized in that: Three first terminals are installed on the top surface of the fixed box, and a support frame is installed on the front side of the fixed box. Three second terminals are provided on the support frame. Each first terminal is electrically connected to one end of three normally open switches of the intermediate relay through a wire, and the other end of the three normally open switches of the intermediate relay is electrically connected to the three second terminals through a wire. A current transformer is respectively provided on the connection line between each first terminal and the corresponding second terminal.

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