CN111929574B - Relay protection test auxiliary simulator - Google Patents
Relay protection test auxiliary simulator Download PDFInfo
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- CN111929574B CN111929574B CN202010785289.8A CN202010785289A CN111929574B CN 111929574 B CN111929574 B CN 111929574B CN 202010785289 A CN202010785289 A CN 202010785289A CN 111929574 B CN111929574 B CN 111929574B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a relay protection test auxiliary simulator which comprises a relay protection device and a relay protection test auxiliary simulator electrically connected with the relay protection device, wherein the relay protection test auxiliary simulator comprises a first simulation breaker CB1, a second simulation breaker CB2, a third simulation breaker CB3, a fourth simulation breaker CB4, a fifth simulation breaker CB5, a sixth simulation breaker CB6, a seventh simulation breaker CB7, an eighth simulation breaker CB8, a ninth simulation breaker CB9 and a tenth simulation breaker CB10 which are sequentially connected in parallel. The beneficial effects are that: an electric loop is formed by the relay protection test auxiliary simulator and the relay protection devices, the relay protection devices are controlled by adopting the opening and closing buttons, the input and output states of the relay protection devices can be monitored and alarmed, and meanwhile, different protection action conditions in the protection devices can be judged through signal lamps, so that the understanding of the relay protection devices is improved.
Description
Technical Field
The invention belongs to the technical field of power industry, and particularly relates to a relay protection test auxiliary simulator.
Background
Relay protection is an important measure for detecting faults or abnormal conditions in a power system, so as to send out alarm signals or directly isolate and cut off fault parts. At present, the existing relay protection real operation room is generally provided with 5 protection devices, namely Siemens 7UT62 main transformer protection, siemens 7UM62 generator protection, nary PCS985G generator protection, nary PCS985BT main transformer protection and Nary RCS931 line protection.
In the verification process, the relay protection equipment is matched with an auxiliary switch, an auxiliary contact and the like. Although the field protection device is connected with the primary switch, the problem is solved, and the verification work is inconvenient when the study and the competition are performed in a laboratory. At present, the portable analog circuit breaker on the market has few loops, does not have audible and visual alarm, and cannot feed back protection action conditions in real time, so that great influence is easily generated on laboratory verification, and students cannot learn autonomously and flexibly, so that understanding of relay protection products is not facilitated.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides an auxiliary simulator for a relay protection test, which is suitable for a relay protection laboratory and is used for simulating the running state of a field circuit breaker, and particularly is designed for simulating the running state of primary equipment of an electric switch of a field transformer substation, so as to provide related auxiliary conditions for the relay protection equipment and solve the technical problems in the related art.
For this purpose, the invention adopts the following specific technical scheme:
the relay protection test auxiliary simulator comprises a relay protection device and a relay protection test auxiliary simulator electrically connected with the relay protection device, wherein the relay protection test auxiliary simulator comprises a first simulation circuit breaker CB1, a second simulation circuit breaker CB2, a third simulation circuit breaker CB3, a fourth simulation circuit breaker CB4, a fifth simulation circuit breaker CB5, a sixth simulation circuit breaker CB6, a seventh simulation circuit breaker CB7, an eighth simulation circuit breaker CB8, a ninth simulation circuit breaker CB9 and a tenth simulation circuit breaker CB10, and the first simulation circuit breaker CB1, the second simulation circuit breaker CB2, the third simulation circuit breaker CB3, the fourth simulation circuit breaker CB4, the fifth simulation circuit breaker CB5, the sixth simulation circuit breaker CB6, the seventh simulation circuit breaker CB7, the eighth simulation circuit breaker CB8, the ninth simulation circuit breaker CB9 and the tenth simulation circuit breaker CB10 are connected in parallel.
Preferably, the analog circuit breaker one CB1 is identical to the analog circuit breaker two CB2, the analog circuit breaker three CB3, the analog circuit breaker four CB4, the analog circuit breaker five CB5, the analog circuit breaker six CB6, the analog circuit breaker seven CB7, the analog circuit breaker eight CB8, the analog circuit breaker CB9 nine and the analog circuit breaker ten CB10 are identical.
Preferably, the analog circuit breaker one CB1 includes a two-position relay one, a two-position relay two, a two-position relay three, a single-phase opening button one, a single-phase opening button two, a single-phase opening button three, a single-phase closing button one, a single-phase closing button two, a single-phase closing button three, a three-phase opening and closing switch one, a three-phase opening and closing switch two, a three-phase opening and closing switch three, and a selection knob one.
Preferably, the first two-position relay, the first single-phase opening button, the first single-phase closing button and the first three-phase opening and closing switch form an opening and closing control loop, the first input end and the second input end of the first three-phase opening and closing switch are connected with a direct current positive electrode, the first output end of the first three-phase opening and closing switch is respectively connected with the first output end of the first single-phase opening and closing button and the first input end of the first two-position relay, the second output end of the first three-phase opening and closing switch is respectively connected with the first output end of the first single-phase opening and closing button and the second input end of the first single-phase opening and closing button, the first input end and the second input end of the first single-phase opening and closing button are mutually connected and are connected with a direct current positive electrode, the second output end of the first single-phase opening and closing button is connected with the third input end of the first two-position relay, and the second output end of the first single-phase opening and closing button is connected with the fourth input end of the first two-position relay.
Preferably, the two-position relay, the single-phase opening button, the single-phase closing button and the three-phase opening and closing switch form an opening and closing control loop II, the first input end and the second input end of the three-phase opening and closing switch II are connected with a direct current positive electrode, the first output end of the three-phase opening and closing switch II is respectively connected with the first output end of the single-phase opening and closing button II and the first input end of the two-position relay II, the second output end of the three-phase opening and closing switch II is respectively connected with the first output end of the single-phase opening and closing button II and the second input end of the two-position relay II, the first input end and the second input end of the single-phase opening and closing button II are mutually connected and are connected with a direct current positive electrode, the second output end of the single-phase opening and closing button II is connected with the third input end of the two-position relay II, and the second output end of the single-phase opening and closing button II is connected with the fourth input end of the two-position relay II.
Preferably, the three-position relay, the three-phase opening and closing button and the three-phase opening and closing switch form an opening and closing control loop, the first input end and the second input end of the three-phase opening and closing switch are connected with the direct current positive electrode, the first output end of the three-phase opening and closing switch is respectively connected with the first output end of the three-phase opening and closing button and the first input end of the three-position relay, the second output end of the three-phase opening and closing switch is respectively connected with the first output end of the three-phase opening and closing button and the second input end of the three-phase opening and closing button, the first input end, the second input end and the first input end of the three-phase opening and closing button are mutually connected with the direct current positive electrode, the second output end of the three-phase opening and closing button is connected with the third input end of the three-position relay, and the second output end of the three-phase opening and closing button is connected with the fourth input end of the three-position relay.
Preferably, the first output end, the second output end and the third output end of the first dual-position relay are connected in parallel and connected with the input end of the first selection knob, and the output end of the first selection knob is connected with the direct current negative electrode.
Preferably, the analog circuit breaker three CB3 comprises a dual-position relay four, a single-phase opening button four, a single-phase closing button four and a selection knob two, wherein the dual-position relay four, the single-phase opening button four and the single-phase closing button four form an opening and closing control loop four, a first input end, a second input end and a first input end and a second input end of the single-phase opening button four are mutually connected and connected with a direct current positive electrode, a first output end of the single-phase opening button four is connected with the first input end of the dual-position relay four, a second output end of the single-phase opening button four is connected with a third input end of the dual-position relay four, a second output end of the single-phase closing button four is connected with a fourth input end of the dual-position relay four, and the first output end, the second output end and the third output end of the dual-position relay four are mutually connected and connected with an input end of the selection knob two, and an output end of the selection knob two is connected with a direct current negative electrode.
Preferably, the input end of the relay protection device is connected with the direct current positive electrode, the first output end and the second output end of the relay protection device are respectively connected with the fifth input end and the sixth input end of any double-position relay, the third output end of the relay protection device is connected with the input end of the audible and visual alarm device, and the output end of the audible and visual alarm device is connected with the direct current negative electrode.
The beneficial effects of the invention are as follows:
1) An electric loop is formed by the relay protection test auxiliary simulator and the relay protection devices, the relay protection devices are controlled by adopting the opening and closing buttons, the input and output states of the relay protection devices can be monitored and alarmed, and meanwhile, different protection action conditions in the protection devices can be judged through signal lamps, so that the understanding of the relay protection devices is improved.
2) The electric loop is formed by the relay protection test auxiliary simulator and the relay protection device, so that the on-site operation state of the protection equipment can be simulated, the functions of simulating the on-site switching-on and switching-off of the circuit breaker, remote switching-on and switching-off, protection tripping and a circuit breaker state indicator lamp are realized, meanwhile, the fault of the electric equipment can be simulated, after the protection action, the indication of a fault signal is performed, a corresponding audible and visual alarm is sent out, the rapid and convenient protection check requiring complex feedback for laboratory simulation is provided, and the environment consistent with the on-site is provided for accident reproduction and experiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall electrical schematic diagram of a simulator constructed by simulating circuit breakers CB1-CB10 in a relay protection test auxiliary simulator according to an embodiment of the invention;
FIG. 2 is one of the electrical schematic diagrams of a relay protection test auxiliary simulator simulating the connection of a circuit breaker CB1 with a relay protection device according to an embodiment of the present invention;
FIG. 3 is a second electrical schematic diagram of a connection between a simulated circuit breaker CB1 and a relay protection device in a relay protection test auxiliary simulator according to an embodiment of the invention;
fig. 4 is an electrical schematic diagram of an analog circuit breaker tricb 3 in a relay protection test auxiliary simulator according to an embodiment of the present invention.
In the figure:
1. a relay protection device; 2. relay protection test auxiliary simulator; 3. a dual position relay I; 4. a second double-position relay; 5. a double-position relay III; 6. a single-phase brake separating button I; 7. a single-phase brake separating button II; 8. a single-phase brake separating button III; 9. a single-phase closing button I; 10. a single-phase closing button II; 11. a single-phase closing button III; 12. a three-phase opening and closing switch I; 13. a three-phase opening and closing switch II; 14. three-phase opening and closing switch III; 15. selecting a first knob; 16. a double-position relay IV; 17. a single-phase brake separating button IV; 18. a single-phase closing button IV; 19. selecting a second knob; 20. and an audible and visual alarm device.
Detailed Description
For the purpose of further illustrating the various embodiments, the present invention provides the accompanying drawings, which are a part of the disclosure of the present invention, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present invention, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.
According to an embodiment of the invention, a relay protection test auxiliary simulator is provided.
The invention will be further described with reference to the drawings and the specific embodiments, as shown in fig. 1-4, the relay protection test auxiliary simulator according to the embodiment of the invention comprises a relay protection device 1 and a relay protection test auxiliary simulator 2 electrically connected with the relay protection device, wherein the relay protection test auxiliary simulator 2 comprises a simulation breaker one CB1, a simulation breaker two CB2, a simulation breaker three CB3, a simulation breaker four CB4, a simulation breaker five CB5, a simulation breaker six CB6, a simulation breaker seven CB7, a simulation breaker eight CB8, a simulation breaker nine and a simulation breaker ten CB10, and the simulation breaker one CB1, the simulation breaker two CB2, the simulation breaker three CB3, the simulation breaker four CB4, the simulation breaker five CB5, the simulation breaker six CB6, the simulation breaker seven CB7, the simulation breaker eight CB8, the simulation breaker CB9 nine and the simulation breaker ten CB10 are connected in parallel. In specific application, the relay protection device 1 in the implementation comprises Siemens 7UT62 main transformer protection, siemens 7UM62 generator protection, nanry PCS985G generator protection, nanry PCS985BT main transformer protection and Nanry RCS931 line protection.
The circuit structures of the analog circuit breaker CB1 and the analog circuit breaker CB2 are the same, each circuit breaker CB1 and the analog circuit breaker CB2 comprises a plurality of double-position relays (UEG/C-8 DPDT), single-phase opening and closing buttons (LA 39-A1-22D), single-phase closing buttons (LA 39-A1-22D), three-phase opening and closing switches (LA 39-A1-44 XS/Kffu) and a selection knob, wherein the double-position relays are used for opening and closing the analog circuit breakers and providing opening and closing state feedback, the single-phase opening and closing buttons are used for controlling the closing operation of the double-position relays, the single-phase opening and closing buttons are used for controlling the opening and closing operation of the three-phase double-position relays, and one or a plurality of groups of analog circuit breakers which are input by the selection knob control are adopted; the circuit structures of the three CB3 analog circuit breaker, the four CB4 analog circuit breaker, the five CB5 analog circuit breaker, the six CB6 analog circuit breaker, the seven CB7 analog circuit breaker, the eight CB8 analog circuit breaker, the nine CB9 analog circuit breaker and the ten CB10 analog circuit breaker are the same, and each circuit structure comprises a plurality of double-position relays for opening and closing the analog circuit breakers and providing feedback of opening and closing states, a plurality of single-phase opening buttons for controlling the opening operation of the double-position relays, a plurality of single-phase closing buttons for controlling the opening operation of the double-position relays and a selection knob for controlling one or a plurality of groups of analog circuit breakers. Specifically, the single-phase opening button and the single-phase closing button are respectively provided with indicator lamps with different colors, for example, the indicator lamps of the single-phase opening button can be set to be green, and the single-phase closing button can be set to be red, namely, when the green light is on, the single-phase opening button indicates that the circuit breaker is in a separated position, and when the red light is on, the single-phase closing button indicates that the circuit breaker is in a combined position.
Specifically, the analog circuit breaker one CB1 includes a two-position relay one 3, a two-position relay two 4, a two-position relay three 5, a single-phase opening button one 6, a single-phase opening button two 7, a single-phase opening button three 8, a single-phase closing button one 9, a single-phase closing button two 10, a single-phase closing button three 11, a three-phase opening and closing switch one 12, a three-phase opening and closing switch two 13, a three-phase opening and closing switch three 14, and a selection knob one 15.
Specifically, the first 3 of dual-position relays, the first 6 of single-phase opening and closing buttons, the first 9 of single-phase closing and the first 12 of three-phase opening and closing switches form an opening and closing control loop, the first input end and the second input end of the first 12 of three-phase opening and closing switches are all connected with a direct current positive electrode, the first output end of the first 12 of three-phase opening and closing switches is respectively connected with the first output end of the first 6 of single-phase opening and closing buttons and the first input end of the first 3 of dual-position relays, the second output end of the first 12 of three-phase opening and closing switches is respectively connected with the first output end of the first 9 of single-phase opening and closing buttons and the second input end of the first 9 of single-phase opening and closing buttons, the first input end and the second input end of the first 9 of single-phase opening and closing buttons are mutually connected with a direct current positive electrode, the second output end of the first 6 of single-phase opening and closing buttons is respectively connected with the first output end of the first 3 of dual-position relays, and the second output end of the first 9 of single-phase opening and closing buttons is respectively connected with the fourth input end of the dual-position relays 3.
Specifically, the two-position relay II 4, the single-phase opening and closing button II 7, the single-phase closing button II 10 and the three-phase opening and closing switch II 13 form an opening and closing control loop II, the first input end and the second input end of the three-phase opening and closing switch II 13 are connected with the direct current positive electrode, the first output end of the three-phase opening and closing switch II 13 is respectively connected with the first output end of the single-phase opening and closing button II 7 and the first input end of the two-position relay II 4, the second output end of the three-phase opening and closing switch II 13 is respectively connected with the first output end of the single-phase closing button II 10 and the second input end of the two-position relay II 4, the first input end, the second input end and the first input end of the single-phase opening and closing button II 10 are mutually connected and are connected with the direct current positive electrode, the second output end of the single-phase opening and closing button II 7 is connected with the third input end of the two-position relay II 4, and the second output end of the single-phase closing button II 10 is connected with the fourth input end of the two-position relay II 4.
Specifically, the three-position relay three 5, the single-phase opening and closing button three 8, the single-phase closing button three 11 and the three-phase opening and closing switch three 14 form an opening and closing control loop three, the first input end and the second input end of the three-phase opening and closing switch three 14 are connected with a direct current positive electrode, the first output end of the three-phase opening and closing switch three 14 is respectively connected with the first output end of the single-phase opening and closing button three 8 and the first input end of the double-position relay three 5, the second output end of the three-phase opening and closing switch three 14 is respectively connected with the first output end of the single-phase closing button three 11 and the second input end of the double-position relay three 5, the first input end, the second input end and the first input end of the single-phase opening and closing button three 11 of the single-phase opening and closing button three 8 are mutually connected and are connected with a direct current positive electrode, the second output end of the single-phase opening and closing button three 8 is respectively connected with the third input end of the double-position relay three 5, and the second output end of the single-phase opening and closing button three 11 is respectively connected with the fourth input end of the double-position relay three 5.
Specifically, the first output end, the second output end and the third output end of the first dual-position relay 3 and the first output end, the second output end and the third output end of the second dual-position relay 4 are connected in parallel and connected with the input end of the first selection knob 15, and the output end of the first selection knob 15 is connected with the direct current negative electrode.
Specifically, the analog circuit breaker three CB3 includes a dual-position relay four 16, a single-phase opening button four 17, a single-phase closing button four 18 and a selection knob two 19, where the dual-position relay four 16, the single-phase opening button four 17 and the single-phase closing button four 18 form an opening and closing control loop four, a first input end and a second input end of the single-phase opening button four 17 are connected with each other and with a direct current positive electrode, a first output end of the single-phase opening button four 17 is connected with a first input end of the dual-position relay four 16, a second output end of the single-phase opening button four 17 is connected with a third input end of the dual-position relay four 16, a first output end of the single-phase closing button four 18 is connected with a fourth input end of the dual-position relay four 16, a first output end, a second output end and a third output end of the dual-phase opening button four 18 are connected with each other and with a selection knob two-side 19, and an output end of the dual-phase opening button four 18 is connected with a negative electrode.
Specifically, the input end of the relay protection device 1 is connected with the direct current positive electrode, the first output end and the second output end of the relay protection device 1 are respectively connected with the fifth input end and the sixth input end of any double-position relay, the third output end of the relay protection device 1 is connected with the input end of an audible and visual alarm device 20 (AD 16-30 JC) which is used for reflecting the protection action condition of the protection device and sending out audible and visual alarm, and the output end of the audible and visual alarm device 20 is connected with the direct current negative electrode.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes in detail the working principle or operation manner of the present invention in the actual process.
When the relay protection device is in practical application, the single-phase opening button, the single-phase closing button and the three-phase opening and closing switch are used for controlling the opening and closing of the double-position relay, the contact point of the double-position relay is used for controlling the single-phase opening button or the single-phase closing button to be on, sending a switch opening and closing position signal to the relay protection device 1, sending a signal to the audible and visual alarm device 2 after the relay protection device 1 acts, and sending audible and visual alarm; the relay protection test auxiliary simulator 2 can effectively simulate the operation condition of the primary equipment of the electric switch of the field transformer substation, provide relevant auxiliary conditions for the relay protection equipment, and provide an environment consistent with the field for accident reproduction and test in a laboratory.
In summary, by means of the above technical scheme of the present invention, the relay protection test auxiliary simulator 2 and the relay protection device 1 form an electrical loop, and the electrical loop is controlled by adopting the switch-on/switch-off button, so that input and output states of a plurality of relay protection devices can be monitored and alarmed, and meanwhile, different protection action conditions in the protection devices can be judged through the signal lamp, so that understanding of the relay protection devices is improved.
In addition, the relay protection test auxiliary simulator 2 and the relay protection device 1 form an electric loop, so that the on-site operation state of the protection equipment can be simulated, the functions of simulating on-site opening and closing of a circuit breaker, remote opening and closing of the circuit breaker, protection tripping and a circuit breaker state indicator lamp are realized, meanwhile, the fault of the electric equipment can be simulated, after the protection action, the indication of fault signals can be realized, corresponding audible and visual alarm can be sent out, the rapidness and convenience can be provided for the protection verification of laboratory simulation requiring complex feedback, and the environment consistent with the on-site can be provided for accident reproduction and experiments.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (1)
1. The relay protection test auxiliary simulator is characterized by comprising a relay protection device (1) and a relay protection test auxiliary simulator (2) electrically connected with the relay protection device, wherein the relay protection test auxiliary simulator (2) comprises a first simulation circuit breaker CB1, a second simulation circuit breaker CB2, a third simulation circuit breaker CB3, a fourth simulation circuit breaker CB4, a fifth simulation circuit breaker CB5, a sixth simulation circuit breaker CB6, a seventh simulation circuit breaker CB7, an eighth simulation circuit breaker CB8, a ninth simulation circuit breaker CB9 and a tenth simulation circuit breaker CB10, and the first simulation circuit breaker CB1, the second simulation circuit breaker CB2, the third simulation circuit breaker CB3, the fourth simulation circuit breaker CB4, the fifth simulation circuit breaker CB5, the sixth simulation circuit breaker CB6, the seventh simulation circuit breaker CB7, the eighth simulation circuit breaker CB8, the ninth simulation circuit breaker CB9 and the tenth simulation circuit breaker CB10 are connected in parallel;
the circuit structures of the analog circuit breaker one CB1 and the analog circuit breaker two CB2 are the same, and the circuit structures of the analog circuit breaker three CB3, the analog circuit breaker four CB4, the analog circuit breaker five CB5, the analog circuit breaker six CB6, the analog circuit breaker seven CB7, the analog circuit breaker eight CB8, the analog circuit breaker nine CB9 and the analog circuit breaker ten CB10 are the same;
the analog circuit breaker one CB1 comprises a double-position relay one (3), a double-position relay two (4), a double-position relay three (5), a single-phase opening button one (6), a single-phase opening button two (7), a single-phase opening button three (8), a single-phase closing button one (9), a single-phase closing button two (10), a single-phase closing button three (11), a three-phase opening and closing switch one (12), a three-phase opening and closing switch two (13), a three-phase opening and closing switch three (14) and a selection knob one (15);
the first input end and the second input end of the first three-phase opening and closing switch (12) are connected with a direct current positive electrode, the first output end of the first three-phase opening and closing switch (12) is respectively connected with the first output end of the first single-phase opening and closing button (6) and the first input end of the first two-position relay (3), the second output end of the first three-phase opening and closing switch (12) is respectively connected with the first output end of the first single-phase opening and closing button (9) and the second input end of the first two-position relay (3), the first input end and the second input end of the first single-phase opening and closing button (6) are mutually connected with the first input end and the second input end of the first single-phase opening and closing button (9) and are respectively connected with the first output end of the first two-position relay (3) and the second input end of the first single-phase opening and closing button (6);
the two-position relay II (4), the single-phase opening and closing button II (7), the single-phase closing and closing button II (10) and the three-phase opening and closing switch II (13) form an opening and closing control loop II, a first input end and a second input end of the three-phase opening and closing switch II (13) are connected with the direct current positive electrode, a first output end of the three-phase opening and closing switch II (13) is respectively connected with a first output end of the single-phase opening and closing button II (7) and a first input end of the two-position relay II (4), a second output end of the three-phase opening and closing switch II (13) is respectively connected with a first output end of the single-phase opening and closing button II (10) and a second input end of the two-phase opening and closing button II (4), the first input end and the second input end of the single-phase opening and closing button II (10) are mutually connected with each other and are connected with the direct current positive electrode, and the second output end of the single-phase opening and closing button II (7) is connected with the second input end of the two-phase opening and closing button II (10);
the three-phase opening and closing switch three (5), the single-phase opening and closing button three (8), the single-phase opening and closing button three (11) and the three-phase opening and closing switch three (14) form an opening and closing control loop three, a first input end and a second input end of the three-phase opening and closing switch three (14) are connected with the direct current positive electrode, a first output end of the three-phase opening and closing switch three (14) is respectively connected with the first output end of the single-phase opening and closing button three (8) and the first input end of the two-phase relay three (5), a second output end of the three-phase opening and closing switch three (14) is respectively connected with the first output end of the single-phase opening and closing button three (11) and the second input end of the two-phase opening and closing button three (5), and a first input end and a second input end of the single-phase opening and closing button three (11) are mutually connected with each other and are respectively connected with the first input end and the second input end of the single-phase opening and closing button three (8) and the first input end and the second input end of the three-phase opening and closing button three (11), and the second input end of the single-phase opening and closing button three opening and closing switch three (11) respectively;
the first output end, the second output end and the third output end of the first two-position relay (3) and the first output end, the second output end and the third output end of the second two-position relay (4) are connected in parallel and connected with the input end of the first selection knob (15), and the output end of the first selection knob (15) is connected with a direct current negative electrode;
the analog circuit breaker three CB3 comprises a double-position relay four (16), a single-phase opening button four (17), a single-phase closing button four (18) and a selection knob two (19), the double-position relay four (16), the single-phase opening button four (17) and the single-phase closing button four (18) form an opening and closing control loop four, a first input end, a second input end and a first input end of the single-phase opening button four (17) are mutually connected with the direct current positive electrode, a first output end of the single-phase opening button four (17) is connected with the first input end of the double-position relay four (16), a second output end of the single-phase opening button four (17) is connected with a third input end of the double-position relay four (16), a first output end of the single-phase opening button four (18) is connected with the second input end of the double-position relay four (16), and a second output end of the single-phase opening button four (17) is connected with the second input end of the double-position relay four (16), and a selection knob four output end of the single-phase opening button four (17) is connected with the second output end of the double-position relay four (16);
the input end of the relay protection device (1) is connected with the direct current positive electrode, the first output end and the second output end of the relay protection device (1) are respectively connected with the fifth input end and the sixth input end of any two-position relay, the third output end of the relay protection device (1) is connected with the input end of the audible and visual alarm device (20), and the output end of the audible and visual alarm device (20) is connected with the direct current negative electrode.
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