CN213845132U - Upper isolation upper grounding locking loop and switch cabinet - Google Patents
Upper isolation upper grounding locking loop and switch cabinet Download PDFInfo
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- CN213845132U CN213845132U CN202022564028.1U CN202022564028U CN213845132U CN 213845132 U CN213845132 U CN 213845132U CN 202022564028 U CN202022564028 U CN 202022564028U CN 213845132 U CN213845132 U CN 213845132U
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Abstract
The utility model provides an go up ground connection shutting return circuit and cubical switchboard in isolation, wherein shutting return circuit, including power supply unit, electrified shutting device, the electrified display of taking the node, keep apart and close a position switch, keep apart and divide a position switch and ground connection to close a position switch, the electrified display of taking the node, ground connection close a position switch and electrified shutting device establish ties in proper order, separate separation and reunion position switch with the electrified display of taking the node is parallelly connected, keep apart divide a position switch with ground connection closes a parallelly connected constitution shutting return circuit of position switch, electrified shutting device and the electrified display and the power supply unit electric connection of taking the node, electrified shutting device sets up the combined floodgate trip gear department at circuit breaker mechanism. Whether the circuit is electrified or not is judged through an electrified display with nodes, the state position of the grounding isolating switch is judged through a position signal of the grounding isolating mechanism, misoperation of the whole scheme is realized through an electrical and mechanical principle, the circuit is automatic and reliable, and the five-prevention requirement is met.
Description
Technical Field
The utility model relates to a looped netowrk cabinet technical field especially relates to an go up ground connection shutting return circuit and cubical switchboard in isolation.
Background
After a standard design customization scheme (2019 edition) for standardization of 12 kilovolt ring main unit (box) is released from a national network of 25.9.9.2019, provincial network companies in the national network area increase and bid 12 kilovolt standard solid insulation ring main units (boxes) and 12 kilovolt standard environment-friendly gas insulation ring main units (boxes), and push the standard to market for wide application; referring to fig. 1 and fig. 2, the scheme specifies that the two ring main units (boxes) are upper isolation upper grounding lower circuit breaker (load switch) schemes, which are different from lower isolation lower grounding upper circuit breaker (load switch) schemes used by conventional power supply offices, and the operation flows are different, so that the use of each office is not customary, and in addition, the scheme is primarily popularized, and the scheme is found to fail to meet the requirements of five-prevention and have potential safety hazards in the application process; in the supply project, the detected unqualified project is detected by the transportation inspection department, and power transmission is prohibited, so that a large number of project projects delay power transmission, and inevitable loss is caused.
Five-prevention generally refers to that in order to ensure personal safety, five anti-misoperation functions are required for high-voltage electrical equipment, which are called for short, and are one of important measures for electric power safety. The five preventions are to prevent the circuit breaker from being opened and closed by mistake; the isolating switch is prevented from being switched on and off under load; preventing the charged hanging (closing) of a grounding wire (a grounding switch); preventing power transmission with ground wire; prevent the wrong entering into the electrified interval. However, when the scheme of the upper isolation upper grounding lower circuit breaker (load switch) of the existing product is applied to the incoming line unit, after the product is overhauled or the installation before power transmission is finished, the circuit breaker is switched off, the switching-off grounding switch is not continuously switched off according to the normal operation flow, but the upper power transmission stage is directly informed, at the moment, the cable chamber is electrified, the circuit breaker can be continuously operated, and no electric and mechanical locking exists; if the circuit breaker is operated to close at this time (see fig. 3), the live grounding is caused, and a grounding fault is formed, so that the upper level trips. And a five-prevention leak is formed, the requirement on five prevention in GB/T3906 is seriously violated, and the grounding switch cannot be switched on in an electrified way.
Therefore, there is a need for an upper isolation upper grounding locking loop, which can not only meet the standards of national grid, but also realize the five-prevention function.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an go up ground connection shutting return circuit and cubical switchboard in isolation can satisfy the standard of national grid, can realize the five-prevention function again, improves the security of keeping apart the ground connection return circuit.
In order to realize the above-mentioned purpose, the utility model provides an go up ground connection blocking return circuit in isolation, including power supply unit, electrified blocking device, the electrified display of taking the node, isolation position switch and ground connection position switch that closes, electrified display, ground connection position switch and the electrified blocking device of taking the node establish ties in proper order, separate separation position switch with the electrified display of taking the node is parallelly connected, isolation position switch with ground connection position switch closes parallelly connected constitution blocking return circuit, electrified blocking device and the electrified display of taking the node respectively with power supply unit electric connection, electrified blocking device sets up closing tripping device department at circuit breaker mechanism.
As a further improvement of the above method, the upper isolation upper ground latching loop further comprises a power supply idle switch for controlling the power supply of the whole latching loop.
As a further improvement of the method, the separation clutch position switch is a normally open switch.
As a further improvement of the method, the isolation position-dividing switch is a normally closed switch.
As a further improvement of the method, the grounding on-position switch is a normally open switch.
As a further improvement of the method, the electrified locking device is a locking electromagnet, and the locking electromagnet is attracted under the condition of electrification and reset under the condition of power failure.
As a further improvement of the above method, the charged display with nodes is in a charged state, and the built-in nodes are closed; and under the condition of no electricity, the built-in node is disconnected.
As a further improvement of the method, when the locking electromagnet is electrified, the magnet is attracted, the closing tripping device works normally, and the breaker mechanism can be closed normally; when the locking electromagnet is powered off, the magnet resets, the closing tripping device is limited, and the circuit breaker mechanism cannot be closed.
The utility model also provides a switch cabinet, keep apart on the above-mentioned ground connection shutting return circuit including the cabinet body and setting in the cabinet is internal.
Because the utility model adopts the above technical scheme, make the beneficial effect that this application possesses lie in:
1. the utility model discloses an go up ground connection blocking circuit in the isolation, take electrified display, the ground connection of node to close a switch and electrified blocking device and establish ties in proper order, separate separation and reunion position switch with the electrified display of taking the node is parallelly connected, keep apart a position switch with the ground connection closes parallelly connected constitution blocking circuit of a switch, electrified blocking device and the electrified display and the power supply unit electric connection of taking the node, electrified blocking device sets up closing tripping device department at circuit breaker mechanism. The utility model gets the isolation position-dividing position signal from the grounding position-closing switch, and gets the incoming line live signal from the live display with the node, and the live display with the node gets the electricity from the power supply device and is connected to the live locking device, and the whole is connected in series to form a locking loop; whether the circuit is electrified or not is judged through an electrified display with nodes, the state position of the grounding isolating switch is judged through a position signal of the grounding isolating mechanism, misoperation of the whole scheme is realized through an electrical and mechanical principle, the circuit is automatic and reliable, and the circuit is not influenced by human factors.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 is a schematic diagram of a conventional primary system for isolating a lower ground from an upper circuit breaker;
fig. 2 is a schematic diagram of a primary system of standard upper isolation upper ground lower circuit breakers required by the national grid;
fig. 3 is a schematic view of the reset state of the live locking device of the circuit breaker mechanism of the present invention;
fig. 4 is a schematic view of the circuit breaker mechanism in an electrified locking state;
FIG. 5 is a schematic diagram of the secondary circuit of the upper isolated upper grounded locking loop of the present invention;
FIG. 6 is a schematic diagram illustrating the wiring of the components of FIG. 5;
fig. 7 is a schematic diagram comparing the principle of the primary system and the secondary circuit of the upper isolated upper grounding locking loop of the present invention when the incoming line is electrified and the grounding is switched on;
fig. 8 is a schematic diagram comparing the principle of the primary system and the secondary circuit of the upper isolated upper grounding locking loop of the present invention when the incoming line is electrified and the grounding is opened;
fig. 9 is a schematic diagram comparing the principle of the primary system and the secondary circuit of the upper isolated upper grounding locking loop of the present invention when the incoming line is electrified and isolated to be switched on;
fig. 10 is a schematic diagram comparing the principle of the primary system and the secondary circuit of the upper isolated upper grounding locking loop of the present invention when the incoming line is non-power and the grounding is switched on;
fig. 11 is a schematic diagram comparing the principle of the primary system and the secondary circuit of the upper isolated upper grounding locking loop of the present invention when the incoming line is free of power and the grounding is opened;
fig. 12 is when the inlet wire is electroless, keep apart the combined floodgate, the utility model discloses an go up to keep apart and go up ground connection shutting return circuit primary system and secondary line principle contrast schematic diagram:
reference numerals:
1. a grounding switch; 2. an isolating switch; 3. a magnet; 4. a closing trip device; 5. a circuit breaker mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators in the embodiments of the present invention, such as the first, second, upper, lower, left, right, front and rear … …, are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
The invention will be further described with reference to the following figures:
example 1:
referring to the drawings, fig. 3-6, the utility model provides an on isolate ground connection shutting return circuit, including power supply unit, electrified shutting device DSN, the electrified display DXN of taking the node, isolation position switch S10, isolation position switch S11 and ground connection position switch S12, the electrified display DXN of taking the node, ground connection position switch S12 and electrified shutting device DSN establish ties in proper order, isolation position switch S10 is parallelly connected with the electrified display DXN of taking the node, isolation position switch S11 closes position switch S12 with the ground connection and parallelly connects and constitutes the shutting return circuit, electrified shutting device DSN and the electrified display DXN of taking the node respectively with power supply unit electric connection, electrified shutting device DSN sets up closing release department at circuit breaker mechanism 5. The utility model gets the isolation branch position signal from the grounding switch S12, and gets the incoming line live signal from the live display DXN with the node, and the live display DXN with the node gets the electricity from the power supply device and then connects to the live locking device DSN, and the whole is connected in series to form a locking loop; whether the circuit is electrified or not is judged through an electrified display DXN with nodes, the state position of the grounding isolating switch is judged through a position signal of the grounding isolating mechanism 5, misoperation of the whole scheme is realized through an electrical and mechanical principle, the circuit is automatic and reliable, the circuit is not influenced by human factors, and the requirements on five-prevention in GB/T3906 can be met.
In the present embodiment, referring to fig. 6, the separation and separation position switch S10 is a normally open switch, and the separation and separation position switch S11 is a normally closed switch; the grounding on-position switch S12 is a normally open switch; the electrified locking device DSN is a locking electromagnet, and the locking electromagnet is attracted under the power-on condition and reset under the power-off condition; when the charged display DXN with the node is in a charged state, the built-in node is closed; and under the condition of no electricity, the built-in node is disconnected.
As a preferred embodiment, when the latching electromagnet is powered on, the magnet 3 is attracted, the closing tripping device 4 works normally, and the breaker mechanism 5 can be normally closed; when the locking electromagnet is powered off, the magnet 3 is reset, the closing tripping device 4 is limited and cannot rotate or act, and the breaker mechanism 5 cannot be closed.
In this embodiment, the upper isolated upper ground blocking loop further comprises a power supply empty switch QF1 for controlling the power supply of the whole blocking loop, and the power supply empty switch QF1 is connected to the blocking loop in series.
After the power supply air switch QF1 is closed, the locking loop is communicated with the power supply to start working; the locking loop has 6 working states, and five-prevention operation is realized in the six working states. The method comprises the following specific steps:
firstly, when incoming lines are electrified, under the condition that an electrified display DXN displays electrification, an earthing switch 1 is in a closing position, an isolating switch 2 is in a separating position, and referring to fig. 7, an internal node of the electrified display DXN is disconnected, an isolating closing switch S10 is disconnected, an isolating separating switch S11 is closed, and an earthing closing switch S12 is closed; the whole electric loop is in a disconnected state, the locking electromagnet DSN is in a non-electricity state, the magnet 3 is in a reset state, the closing tripping device 4 is limited, the breaker mechanism 5 cannot be closed, and the five-prevention function is met;
secondly, when incoming lines are electrified, under the condition that an electrified display DXN displays electrification, the grounding switch 1 is in a disconnecting position, the isolating switch 2 is in a disconnecting position, and referring to fig. 8, a built-in node of the electrified display DXN is disconnected, the isolating closing switch S10 is disconnected, the isolating disconnecting switch S11 is disconnected, and the grounding closing switch S12 is disconnected; the whole electric loop is in a disconnected state, the locking electromagnet DSN is in a non-electricity state, the magnet 3 is in a reset state, the closing tripping device 4 is limited, the breaker mechanism 5 cannot be closed, and the five-prevention function is met;
thirdly, when the incoming line is electrified, under the condition that the electrified display DXN displays electrification, the grounding switch 1 is in a brake-off position, the isolating switch 2 is in a brake-on position, and referring to the attached figure 9, the built-in node of the electrified display DXN is disconnected, the isolating switch-on switch S10 is closed, the isolating switch-off switch S11 is closed, and the grounding switch-on switch S12 is disconnected; the whole electric circuits are communicated, the locking electromagnet DSN is electrified, the magnet 3 is attracted, the closing tripping device 4 is not limited, the breaker mechanism 5 can normally close, and the five-prevention function is met;
fourthly, when incoming lines are not electrified, under the condition that the live display DXN displays no electricity, the grounding switch 1 is in a closing position, the isolating switch 2 is in a separating position, and referring to the attached drawing 10, a built-in node of the live display DXN is closed, the isolating closing switch S10 is opened, the isolating separating switch S11 is closed, and the grounding closing switch S12 is closed; the whole electric circuits are communicated, the locking electromagnet DSN is electrified, the magnet 3 is attracted, the closing tripping device 4 is not limited, the breaker mechanism 5 can normally close, and the five-prevention function is met;
fifthly, when incoming lines are not electrified, under the condition that the live display DXN displays no electricity, the grounding switch 1 is in a disconnecting position, the isolating switch 2 is in a disconnecting position, and referring to fig. 11, a built-in node of the live display DXN is closed, the isolating closing switch S10 is opened, the isolating disconnecting switch S11 is opened, and the grounding closing switch S12 is opened; the whole electric loop is disconnected, the locking electromagnet DSN is in a non-electric state, the magnet 3 is in a reset state, the closing tripping device 4 is limited, the breaker mechanism 5 cannot be closed, and the five-prevention function is met;
sixthly, when the incoming line is not electrified, under the condition that the live display DXN displays no electricity, the grounding switch 1 is in a disconnecting position, the isolating switch 2 is in a closing position, and referring to the attached drawing 12, a built-in node of the live display DXN is closed, the isolating closing switch S10 is closed, the isolating disconnecting switch S11 is closed, and the grounding closing switch S12 is opened; the whole electrical circuits are communicated, the electromagnet DSN is electrified, the magnet 3 is attracted, the closing tripping device 4 is not limited, the breaker mechanism 5 can normally close, and the five-prevention function is met;
the utility model discloses an on keep apart under the upper grounding circuit breaker closed circuit all satisfy five-prevention function under 6 operating condition in the circuit breaker scheme under the upper grounding of last isolation under, and through the inherent position state of switch and the automatic shutting or the unblock state that realizes of electrified display state, avoided the artificial maloperation that probably exists.
Example 2:
the utility model also provides a switch cabinet, keep apart on the above-mentioned ground connection shutting return circuit including the cabinet body and setting in the cabinet is internal.
The above is a detailed introduction of the present invention, and the principles and embodiments of the present invention have been explained herein using specific embodiments, and the explanations of the above embodiments are only used to help understand the methods and core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. The utility model provides an go up ground connection blocking circuit in isolation, its characterized in that closes a position switch, keeps apart and divides a position switch and ground connection including power supply unit, electrified blocking device, the electrified display of taking the node, keep apart and close a position switch and ground connection and close a position switch, the electrified display of taking the node, ground connection close a position switch and electrified blocking device and establish ties in proper order, separate and separate a position switch with the electrified display of taking the node is parallelly connected, keep apart divide a position switch with ground connection closes a position switch and parallelly connected constitution blocking circuit, electrified blocking device and the electrified display of taking the node respectively with power supply unit electric connection.
2. The upper isolated upper ground latch circuit of claim 1 wherein said live latch is disposed at a closing trip of a circuit breaker mechanism.
3. The upper isolated upper ground latch circuit of claim 2 further comprising a power supply null switch controlling the overall latch circuit power supply.
4. An upper isolating upper grounding closed circuit according to any one of claims 1 to 3, wherein the isolating and engaging position switch is a normally open switch.
5. An upper isolated upper ground lock loop according to any of claims 1-3, wherein the isolation position switch is a normally closed switch.
6. An upper isolated upper ground lockout circuit according to any of claims 1-3 wherein the ground on switch is a normally open switch.
7. An upper isolated upper grounded locking loop as claimed in any one of claims 1 to 3 wherein the live locking means is a locking electromagnet which engages when energized and resets when de-energized.
8. An upper isolated upper ground latch circuit according to any of claims 1-3, wherein said display with node is powered on, and the internal node is closed; and under the condition of no electricity, the built-in node is disconnected.
9. The upper isolated upper grounded locking circuit of claim 7, wherein when the locking electromagnet is energized, the magnet is attracted, the closing trip device works normally, and the circuit breaker mechanism can be normally closed; when the locking electromagnet is powered off, the magnet resets, the closing tripping device is limited, and the circuit breaker mechanism cannot be closed.
10. A switchgear cabinet comprising a cabinet body and an upper isolated upper ground latching circuit as claimed in claims 1-9 disposed in the cabinet body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022564028.1U CN213845132U (en) | 2020-11-09 | 2020-11-09 | Upper isolation upper grounding locking loop and switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022564028.1U CN213845132U (en) | 2020-11-09 | 2020-11-09 | Upper isolation upper grounding locking loop and switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213845132U true CN213845132U (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022564028.1U Active CN213845132U (en) | 2020-11-09 | 2020-11-09 | Upper isolation upper grounding locking loop and switch cabinet |
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| Country | Link |
|---|---|
| CN (1) | CN213845132U (en) |
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- 2020-11-09 CN CN202022564028.1U patent/CN213845132U/en active Active
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Address after: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee after: Weisheng Energy Technology Co.,Ltd. Address before: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee before: WASION ELECTRIC Co.,Ltd. |