CN115810985A - Low-voltage power supply distribution cabinet of multifunctional safety protection system - Google Patents
Low-voltage power supply distribution cabinet of multifunctional safety protection system Download PDFInfo
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- CN115810985A CN115810985A CN202310069546.1A CN202310069546A CN115810985A CN 115810985 A CN115810985 A CN 115810985A CN 202310069546 A CN202310069546 A CN 202310069546A CN 115810985 A CN115810985 A CN 115810985A
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Abstract
The invention relates to the technical field of electric power safety, in particular to a low-voltage power supply distribution cabinet of a multifunctional safety protection system, which comprises a cabinet body, wherein an isolating switch, an electric energy meter, a current transformer, an ammeter, a breaker for emergency brake opening, a test power supply output circuit breaker, a control power supply circuit breaker and a breaker electric on-off system with a safety protection function are arranged in the cabinet body, and the breaker electric on-off system with the safety protection function comprises a DC24V control power supply, a breaker electric operating mechanism, a breaker on-off switch, an undetached ground wire locking switch and a grating safety system. The invention can realize that the circuit breaker of the power distribution cabinet can not be switched on and can not output the test power supply when the ground wire connected with the power output side is not taken down and hung on the locking switch, can effectively prevent the power distribution cabinet from being switched on with the ground wire during operation, and can realize automatic and rapid disconnection of the test power supply when personnel enter a dangerous electrified area set by a matched grating.
Description
Technical Field
The invention relates to the technical field of electric power safety, in particular to a low-voltage (220V, 400V) power distribution cabinet of a multifunctional safety protection system.
Background
The low-voltage power distribution cabinet is widely used, and personal and power grid safety accidents caused by improper operation are also endless. Except strengthening safety control and training, improve switch board safety protection design from the technical level, it is significant from technical improvement switch board security and reliability.
The three-phase power needed by the low-voltage power distribution cabinet is generally introduced into the distribution cabinet (room) through the power transmission line and is accessed into the test transformer or the electric equipment through the control of the low-voltage power distribution cabinet. Safety protection measures are commonly found in mechanical locking, grounding and the like of a high-voltage switch cabinet, and besides overcurrent and leakage protection, the low-voltage power distribution cabinet which is frequently operated is technically lack of other effective preventive safety protection measures, so that serious safety accidents such as switching-on with a ground wire and electric shock caused by mistakenly entering an electrified area are easy to occur.
Therefore, the low-voltage power distribution cabinet of the multifunctional safety protection system is provided, the output power supply of the power distribution cabinet cannot be switched on with a grounding wire, personnel or moving objects can be automatically and quickly switched off when entering an electrified dangerous area by mistake, and the remote switching-on and switching-off operation of a circuit breaker of the power distribution cabinet is realized.
Disclosure of Invention
The invention provides a low-voltage power distribution cabinet of a multifunctional safety protection system, and solves the technical problems that an existing low-voltage test power switch cabinet lacks an effective preventive safety protection technology, and typical safety accidents such as switching-on with a ground wire and mistakenly entering a live area easily occur.
The low-voltage power distribution cabinet of the multifunctional safety protection system comprises a cabinet body, wherein an isolating switch, an electric energy meter, a current transformer, an ammeter, a breaker for emergency opening, a test power output circuit breaker, a control power circuit breaker and a breaker electric opening and closing system with a safety protection function are arranged in the cabinet body; the isolating switch is arranged at the uppermost part of the cabinet body and is connected with a test power supply inlet wire and a circuit breaker, a current transformer is connected in series with each phase conductor between the isolating switch and the circuit breaker for emergency brake-off, three current values are displayed through three current meters connected to a cabinet door of the switch cabinet, an electric energy meter is arranged between the isolating switch and the current transformer and displays electricity consumption, the circuit breaker for emergency brake-off and the circuit breaker for test power supply output circuit are connected in series with a power supply output circuit from top to bottom, the circuit breaker for emergency brake-off is used for brake-off operation under emergency condition of failure of an electric mechanism, the circuit breaker for test power supply output circuit is combined with an electric brake-on and brake-off system of the circuit breaker with a safety protection function, and the circuit breaker for control power supply is used for switching off a control power supply of the electric brake-on and brake-off system with the safety protection function; the electric switching-on and switching-off system of the circuit breaker with the safety protection function comprises a DC24V control power supply, an electric operating mechanism of the circuit breaker, a switching-on and switching-off switch of the circuit breaker, a locking switch without disconnecting a grounding wire and a grating safety system.
Preferably, the input end of the DC24V control power supply is connected with the output end of the circuit breaker of the control power supply loop, and the output end of the DCV control power supply is connected with the grating safety system and the electric operating mechanism of the circuit breaker to provide direct-current power supply for the grating safety system and the electric operating mechanism of the circuit breaker.
Preferably, the circuit breaker electric operating mechanism is connected with a circuit breaker switch handle of the test power output loop, the circuit breaker electric operating mechanism is provided with a switching-off signal input end S2, a switching-on signal input end S2 and a public end S1, the switching-off signal input end S2 is communicated with the public end S1 to realize switching-off operation, and the switching-on signal input end S2 is communicated with the public end S1 to realize switching-on operation.
Preferably, the breaker opening and closing switch comprises a remote closing button, a remote opening button, a nearby closing button and a nearby opening button; the remote switching-off button and the remote switching-on button are in a group and are arranged on the test bed; the nearby opening button and the nearby closing button are in a group and are arranged on the cabinet door; the remote brake-separating button and the nearby brake-separating button are connected with a brake-separating signal input end S2 and a public end S1 through signal lines; the remote closing button and the nearby closing button are connected with a closing signal input end S2 and a public end S1 through signal lines.
Preferably, the undetached ground wire locking switch comprises an undetached ground wire locking switch upper shell, an undetached ground wire locking switch lower shell, an upper shell and a lower shell linking bolt, a spring, a pressing type normally open switch, a ground wire hanging rod and a ground wire hanging rod fixing bolt, wherein the undetached ground wire locking switch upper shell and the undetached ground wire locking switch lower shell are connected through the upper shell and the lower shell linking bolt, the spring is fixed between the undetached ground wire locking switch upper shell and the undetached ground wire locking switch lower shell, the spring elastically supports the undetached ground wire locking switch upper shell and the undetached ground wire locking switch lower shell for a certain distance, the pressing type normally open switch is fixed on the undetached ground wire locking switch lower shell and positioned below the ground wire hanging rod, and the ground wire hanging rod is fixed on the undetached ground wire locking switch upper shell through the ground wire hanging rod fixing bolt.
Preferably, the pressing type normally open switch is connected in series between a remote closing button and a signal wire connected with a near closing button and a public end S1, and after a grounding wire is hung on a grounding wire hanging rod, an upper shell of a locking switch of an undetached grounding wire is driven under the action of the gravity of the grounding wire to press the pressing type normally open switch, so that the remote closing button, the near closing button and the public end S1 are conducted; if the grounding wire is not hung on the grounding wire hanging rod, the remote closing button, the near closing button and the public end S1 are in a disconnected state, and the closing cannot be performed.
Preferably, the grating safety system comprises a grating transmitter, a grating receiver and an intermediate relay; the grating transmitter and the grating receiver are arranged on the periphery of the test field; the grating transmitter, the grating receiver and the intermediate relay are all powered by a DC24V control power supply, the output side of the grating receiver is connected with the power supply side of the intermediate relay through a signal line, a normally closed contact of the intermediate relay is connected with a switching-off signal input end S2, and a common contact of the intermediate relay is connected with a common end S1; when a safety light curtain formed by the grating sensor is shielded by an intruder or an object, the intermediate relay is powered off to enable the normally closed contact to be attracted, and the common end S1 of the electric operating mechanism of the circuit breaker is connected with the opening signal input end S2 to enable the test power supply output circuit to be opened.
The invention can realize that the circuit breaker of the power distribution cabinet can not be switched on and can not output a test power supply when the ground wire connected with the power output side is not taken down and hung on the locking switch, and can effectively prevent the power distribution cabinet from being switched on with the ground wire during operation. The grating isolation protection device for the power distribution cabinet is designed for enabling personnel to enter single or multiple dangerous areas, so that the testing power supply can be automatically and quickly disconnected when the personnel enter a dangerous electrified area set by the matched grating, and the personal safety of operating personnel and equipment is guaranteed. The power distribution cabinet has the functions of safety protection for preventing undetached grounding wires, safety protection for gratings and remote on-off of circuit breakers, can obviously reduce the safety accidents of power distribution operation, has high action reliability and low cost, is suitable for various low-voltage power distribution cabinets, and is particularly suitable for power distribution rooms, high-voltage laboratories and the like in which low-voltage power supplies need to be frequently operated. The invention integrates preventive safety technology into the cabinet body, has compact integral structure and is suitable for various use occasions, and innovatively designs an undetached grounding wire locking switch, a grating safety protection system and a power distribution cabinet circuit breaker remote operation structure, thereby realizing the mechanical and electrical double locking function of the undetached grounding wire before the power supply is switched on and technically ensuring the safety of operators and electrical equipment.
Drawings
Fig. 1 is a schematic structural diagram of a low-voltage power distribution cabinet of a multifunctional safety protection system in an embodiment;
FIG. 2 is a schematic diagram of an embodiment of an undetached ground wire locking switch;
FIG. 3 is a schematic view of an embodiment of an undetached ground wire locking switch;
FIG. 4 is a diagram of the wiring of the undetached ground wire latch to the circuit breaker electrical operating mechanism of the embodiment;
FIG. 5 is a wiring diagram of the grating system in the example.
In the drawings:
1-isolating switch, 2-electric energy meter, 3-current transformer, 4-ammeter, 5-intermediate relay, 6-DC24V control power supply, 7-breaker for emergency opening, 8-test power supply output circuit breaker, 9-control power supply circuit breaker, 10-breaker electric operating mechanism, 11-grating transmitter, 12-grating receiver, 13-undetached ground wire locking switch, 14-remote closing button, 15-remote opening button, 16-near closing button, 17-near opening button, 18-undetached ground wire locking switch upper shell, 19-undetached ground wire locking switch lower shell, 20-upper and lower shell connecting bolt, 21-spring, 22-ground wire hanging rod, 23-ground wire pressing type hanging rod fixing bolt and 24-normally open switch.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.
Examples
As shown in fig. 1-5, the present embodiment provides a low-voltage power distribution cabinet of a multifunctional safety protection system, which includes a cabinet body, in which an isolation switch 1, an electric energy meter 2, a current transformer 3, an ammeter 4, a breaker 7 for emergency opening, a test power output circuit breaker 8, a control power circuit breaker 9, and a breaker electric opening and closing system with a safety protection function are arranged; the isolating switch 1 is installed at the uppermost part of the cabinet body and is connected with a test power inlet wire and a circuit breaker, a current transformer 3 is connected in series with each phase conductor between the isolating switch 1 and the circuit breaker 7 for emergency opening, three-phase current numerical values are displayed through three current meters 4 connected to a cabinet door of the switch cabinet, an electric energy meter 2 is installed between the isolating switch 1 and the current transformer 3 to display electricity consumption, the circuit breaker 7 for emergency opening and the circuit breaker 8 for test power output are connected in series with a power output circuit up and down, the circuit breaker 7 for emergency opening is used for opening operation under emergency condition of failure of an electric mechanism, the circuit breaker 8 for test power output is combined with an electric opening and closing system of the circuit breaker with a safety protection function, and the circuit breaker 9 for control power of the electric opening and closing system with the safety protection function is used for opening and closing a control power supply of the electric opening and closing system with the safety protection function; the electric switching-on and switching-off system of the circuit breaker with the safety protection function comprises a DC24V control power supply 6, an electric operating mechanism 10 of the circuit breaker, a switching-on and switching-off switch of the circuit breaker, a locking switch 13 of an undetached grounding wire and a grating safety system.
The input end of the DC24V control power supply 6 is connected with the output end of the control power supply loop circuit breaker 9, the output end of the DC24V control power supply 6 is connected with the grating safety system and the circuit breaker electric operating mechanism 10, and direct current power is provided for the grating safety system and the circuit breaker electric operating mechanism 10.
The circuit breaker electric operating mechanism 10 is connected with a switch handle of a test power supply output loop circuit breaker 8, the circuit breaker electric operating mechanism 10 is provided with a switching-off signal input end S2, a switching-on signal input end S2 and a public end S1, the switching-off signal input end S2 is communicated with the public end S1 to achieve switching-off operation, and the switching-on signal input end S2 is communicated with the public end S1 to achieve switching-on operation.
The breaker opening and closing switch comprises a far Cheng Gezha button 14, a far opening button 15, a near closing button 16 and a near opening button 17; the remote opening button 15 and the remote closing button 14 are in a group and are arranged on the test bed; the nearby opening button 17 and the nearby closing button 16 are combined and arranged on the cabinet door; the remote opening button 15 and the nearby opening button 17 are connected with an opening signal input end S2 and a public end S1 of the circuit breaker electric operating mechanism 10 through signal lines; the remote closing button 14 and the near closing button 16 are connected with a closing signal input end S2 and a common end S1 of the circuit breaker electric operating mechanism 10 through signal lines.
The undetached ground wire locking switch 13 includes an undetached ground wire locking switch upper case 18, an undetached ground wire locking switch lower case 19, an upper and lower case link pin 20, a spring 21, a pressing type normally open switch 24, a ground wire link rod 22, and a ground wire link rod fixing bolt 23, the undetached ground wire locking switch upper case 18 and the undetached ground wire locking switch lower case 19 are connected by the upper and lower case link pin 20, the spring 21 is fixed between the undetached ground wire locking switch upper case 18 and the undetached ground wire locking switch lower case 19, the spring 21 elastically supports the undetached ground wire locking switch upper case 18 and the undetached ground wire locking switch lower case 19 at a certain distance, the pressing type normally open switch 24 is fixed on the undetached ground wire locking switch lower case 19 and is located below the ground wire link rod 22, and the ground wire link rod 22 is fixed to the undetached ground wire locking switch upper case 18 by the ground wire link rod fixing bolt 23.
The pressing type normally open switch 24 is connected in series between the remote closing button 14, the nearby closing button 16 and a signal line connected with the public end S1 of the circuit breaker electric operating mechanism 10, and after a grounding wire is hung on the grounding wire hanging rod 22, the grounding wire hanging rod can drive the undetached grounding wire locking switch upper shell 18 to press the pressing type normally open switch 24 under the action of the gravity of the grounding wire, so that the remote closing button 14, the nearby closing button 16 and the public end S1 are conducted; if the grounding wire is not hung on the grounding wire hanging rod 22, the remote closing button 14, the near closing button 16 and the public end S1 are in a disconnected state, and closing cannot be performed, so that typical safety accidents such as closing with the grounding wire are effectively avoided.
The grating safety system comprises a grating transmitter 11, a grating receiver 12 and an intermediate relay 5; the grating transmitter 11 and the grating receiver 12 are arranged at the periphery of a test field, and an infrared light curtain formed by the correlation of a plurality of groups of grating sensor transceiving components is used for photoelectrically isolating the test field from the periphery; the grating transmitter 11, the grating receiver 12 and the intermediate relay 5 are all powered by a DC24V control power supply 6, the output side of the grating receiver 12 is connected with the power supply side of the intermediate relay 5 through a signal line, a normally closed contact of the intermediate relay 5 is connected with a switching-off signal input end S2, and a common contact of the intermediate relay 5 is connected with a common end S1; when a safety light curtain formed by the grating sensor is shielded by an intruder or an object, the intermediate relay 5 is powered off to enable the normally closed contact to be attracted, and the common end S1 of the circuit breaker electric operating mechanism 10 is connected with the brake-separating signal input end S2 to enable the test power output circuit breaker 8 to be separated, so that danger caused by the fact that the person mistakenly intrudes into a charged area is avoided.
Before formal electrification, a grounding wire hung on test equipment such as a test transformer and the like is taken down and hung on a grounding wire hanging rod 22 of an undetached grounding wire locking switch 13 arranged on the side surface of a cabinet body, at the moment, under the action of gravity of the grounding wire, an undetached grounding wire locking switch upper shell 18 overcomes the elastic force of a spring 21 arranged in the cabinet body and presses a pressing type normally open switch 24, so that a public end S1 of an electric operating mechanism 10 of the circuit breaker is conducted with a remote closing button 14 and a near closing button 16.
At the moment, the isolating switch 1 is closed, the breaker 7 for emergency brake opening is closed, the control power circuit breaker 9 is closed, the power supply of the grating transmitter 11, the grating receiver 12, the breaker electric operating mechanism 10 and the intermediate relay 5 is conducted, the test power output circuit short-circuiting device 8 separates the test load from the power supply, and the switch-on condition is achieved.
Then, the remote closing button 14 or the near closing button 16 is pressed, the common end S1 and the closing signal input end S2 of the circuit breaker electric operating mechanism 10 are conducted, the test power supply output circuit breaker is closed, and the test load is electrified.
If the ground wire which is not hung on the test equipment such as the test transformer is taken down and hung on the ground wire hanging rod 22 of the undetached ground wire locking switch 13 which is arranged on the side surface of the cabinet body before formal electrification, under the elastic force of the spring 21, the upper shell 18 of the undetached ground wire locking switch cannot press the pressing type normally open switch 24, and at the moment, the public end S1 of the electric operating mechanism 10 of the circuit breaker is in a disconnection state with the remote closing button 14 and the near closing button 16.
In this situation, even if the disconnecting switch 1 is continuously turned on, the breaker 7 for emergency opening is turned on, then the control power circuit breaker 9 is turned on, and finally the remote closing button 14 or the nearby closing button 16 is pressed, at this time, because the common end S1 of the breaker electric operating mechanism 10, the remote closing button 14 and the nearby closing button 16 are in an off state, after the closing button is pressed, the common end S1 of the breaker electric operating mechanism 10 and the closing signal input end S2 are still not conducted, and closing is invalid. Therefore, the locking function of the undetached ground wire is realized, and the safety accidents of closing with the ground wire and the like are effectively prevented.
After the switch-on and power-on are correctly operated, if the power supply needs to be disconnected, the remote switch-off button 15 or the nearby switch-off button 17 is only needed to be pressed, at the moment, the public end S1 of the circuit breaker electric operating mechanism 10 is conducted with the switch-off signal input end S2, the test power supply output circuit breaker 8 is switched off, and the test power supply is disconnected. If the button is not effective when being pressed, but the test power supply is required to be disconnected urgently, the breaker 7 for emergent brake opening can be manually pulled open, and the test safety is ensured.
After the correct operation is switched on, if a tester mistakenly enters a light curtain formed by the grating transmitter 11 and the grating receiver 12 and enters an electrified area, the intermediate relay 5 is electrified to enable the public end S1 of the circuit breaker electric operating mechanism 10 to be conducted with the switching-off signal input end S2, the circuit breaker 8 of the test power output loop is switched off, the test power is rapidly switched off, the tester is effectively prevented from getting an electric shock, and the safety of the tester is further ensured.
This embodiment can connect a plurality of separating brake buttons and grating transceiver in parallel, according to various place demands, can set up a plurality of urgent separating brake buttons and light curtain isolation region, and the safety protection function has good expansibility.
The embodiment can realize that the power circuit breaker cannot be arranged at the position of closing when the ground wire of the power output side is not taken down and hung on the locking switch, realizes mechanical and electrical double locking of the undetached ground wire, and effectively prevents dangerous operation of closing with the ground wire in the operation process; meanwhile, when personnel enter an isolation area arranged by the matched grating, the test power supply is automatically and quickly disconnected; and reserving a wiring terminal of the remote opening and closing button. Further ensure the personal safety of the testing personnel and the stability and reliability of the testing equipment. This embodiment design simple structure, it is multiple functional, both can regard as novel switch board manufacturing, also can reform transform the realization on current switch board, the action reliability is high, and is with low costs, is suitable for various use occasions and working range. The invention has the advantages that the sample is installed and used on site, and the effect is excellent.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. The utility model provides a many functional safety protection system's low-voltage power switch board which characterized in that: the intelligent emergency brake system comprises a cabinet body, wherein an isolating switch (1), an electric energy meter (2), a current transformer (3), an ammeter (4), a breaker (7) for emergency brake opening, a test power supply output circuit breaker (8), a control power supply circuit breaker (9) and a breaker electric brake opening and closing system with a safety protection function are arranged in the cabinet body; the isolating switch (1) is installed at the uppermost part of the cabinet body and connected with a test power inlet wire and a circuit breaker, a current transformer (3) is connected in series with each phase conductor between the isolating switch (1) and the circuit breaker (7) for emergency opening, three-phase current numerical values are displayed through three current meters (4) connected to a cabinet door of the switch cabinet, an electric energy meter (2) is installed between the isolating switch (1) and the current transformer (3) to display electricity consumption, the circuit breaker (7) for emergency opening and the circuit breaker (8) for test power output are connected in series with a power output circuit up and down, the circuit breaker (7) for emergency opening and closing is used for opening and closing operation under emergency condition of failure of an electric mechanism, the circuit breaker (8) for test power output is combined with an electric opening and closing system of the circuit breaker with a safety protection function, and the circuit breaker (9) for controlling a control power supply of the electric opening and closing system with the safety protection function; the electric switching-on and switching-off system of the circuit breaker with the safety protection function comprises a DC24V control power supply (6), an electric operating mechanism (10) of the circuit breaker, a switching-on and switching-off switch of the circuit breaker, a locking switch (13) of an undetached ground wire and a grating safety system.
2. The low-voltage power distribution cabinet of the multifunctional safety protection system according to claim 1, characterized in that: the input end of a DC24V control power supply (6) is connected with the output end of a control power supply loop circuit breaker (9), the output end of the DC24V control power supply (6) is connected with a grating safety system and a circuit breaker electric operating mechanism (10), and a direct-current power supply is provided for the grating safety system and the circuit breaker electric operating mechanism (10).
3. The low-voltage power distribution cabinet of the multifunctional safety protection system according to claim 2, characterized in that: the circuit breaker electric operating mechanism (10) is connected with a switch handle of the test power output loop circuit breaker (8), the circuit breaker electric operating mechanism (10) is provided with a switching-off signal input end S2, a switching-on signal input end S2 and a public end S1, the switching-off signal input end S2 is communicated with the public end S1 to achieve switching-off operation, and the switching-on signal input end S2 is communicated with the public end S1 to achieve switching-on operation.
4. The low-voltage power distribution cabinet of the multifunctional safety protection system according to claim 3, characterized in that: the breaker opening and closing switch comprises a remote closing button (14), a remote opening button (15), a near closing button (16) and a near opening button (17); the remote switching-off button (15) and the remote switching-on button (14) are in a group and are arranged on the test bed; the nearby opening button (17) and the nearby closing button (16) form a group and are arranged on the cabinet door; the remote brake-separating button (15) and the nearby brake-separating button (17) are connected with a brake-separating signal input end S2 and a public end S1 through signal lines; the remote closing button (14) and the close closing button (16) are connected with a closing signal input end S2 and a public end S1 through signal lines.
5. The low-voltage power distribution cabinet of the multifunctional safety protection system according to claim 4, wherein: the undetached ground wire locking switch (13) comprises an undetached ground wire locking switch upper shell (18), an undetached ground wire locking switch lower shell (19), an upper shell and a lower shell linking bolt (20), a spring (21), a pressing type normally open switch (24), a ground wire hanging rod (22) and a ground wire hanging rod fixing bolt (23), wherein the undetached ground wire locking switch upper shell (18) and the undetached ground wire locking switch lower shell (19) are connected through the upper shell and the lower shell linking bolt (20), the spring (21) is fixed between the undetached ground wire locking switch upper shell (18) and the undetached ground wire locking switch lower shell (19), the spring (21) can prop the undetached ground wire locking switch upper shell (18) and the undetached ground wire locking switch lower shell (19) through the elastic force of the spring (21), the pressing type normally open switch (24) is fixed on the undetached ground wire locking switch lower shell (19) and is positioned below the ground wire hanging rod (22), and the ground wire hanging rod (22) is fixed on the undetached ground wire locking switch upper shell (18) through the ground wire hanging rod fixing bolt (23).
6. The low-voltage power distribution cabinet of the multifunctional safety protection system according to claim 5, wherein: the pressing type normally open switch (24) is connected in series between the remote closing button (14) and a signal line connected with the near closing button (16) and the public end S1, and after a grounding wire hanging rod (22) is hung on a grounding wire, an upper shell (18) of an undetached grounding wire locking switch is driven under the action of the gravity of the grounding wire to press the pressing type normally open switch (24) so as to enable the remote closing button (14), the near closing button (16) and the public end S1 to be communicated; if the grounding wire is not hung on the grounding wire hanging rod (22), the remote closing button (14), the near closing button (16) and the common end S1 are in a disconnected state, and the closing cannot be performed.
7. The low-voltage power distribution cabinet of the multifunctional safety protection system according to claim 6, characterized in that: the grating safety system comprises a grating transmitter (11), a grating receiver (12) and an intermediate relay (5); the grating transmitter (11), the grating receiver (12) and the intermediate relay (5) are all powered by a DC24V control power supply (6), the output side of the grating receiver (12) is connected with the power supply side of the intermediate relay (5) through a signal line, a normally closed contact of the intermediate relay (5) is connected with a switching-off signal input end S2, and a common contact of the intermediate relay (5) is connected with a common end S1; when a safety light curtain formed by the grating sensor is shielded by an intruder or an object, the intermediate relay (5) is de-energized to enable the normally closed contact to be sucked, and the common end S1 of the circuit breaker electric operating mechanism (10) is connected with the opening signal input end S2 to enable the test power output circuit breaker (8) to be opened.
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| CN202310069546.1A CN115810985B (en) | 2023-02-06 | 2023-02-06 | Multi-functional safety protection system's low-voltage power distribution cabinet |
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| CN202310069546.1A CN115810985B (en) | 2023-02-06 | 2023-02-06 | Multi-functional safety protection system's low-voltage power distribution cabinet |
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| WO2015103883A1 (en) * | 2014-01-13 | 2015-07-16 | 江苏现代电力科技股份有限公司 | Integrated high-voltage alternating-current circuit breaker controller |
| CN203895634U (en) * | 2014-04-10 | 2014-10-22 | 国家电网公司 | Safety ground wire support |
| CN206546789U (en) * | 2017-03-24 | 2017-10-10 | 国网甘肃省电力公司兰州供电公司 | The anti-powered conjunction earthing knife-switch blocking device of one kind |
| CN208723117U (en) * | 2018-09-06 | 2019-04-09 | 中国长江电力股份有限公司 | A kind of ground line of band mounting signal feedback |
| CN212435185U (en) * | 2020-07-29 | 2021-01-29 | 浙江旺能环保有限公司 | Electromagnetic type drawer cabinet anti-misoperation locking device |
| WO2022127160A1 (en) * | 2020-12-14 | 2022-06-23 | 河南平高电气股份有限公司 | Opening/closing operation apparatus for multiple types of circuit breaker, and fault detection method |
| CN217085168U (en) * | 2022-03-16 | 2022-07-29 | 内蒙古电力(集团)有限责任公司乌兰察布供电分公司 | Electrical equipment high-voltage test safety protection system |
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|---|---|
| CN115810985B (en) | 2023-07-07 |
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