CN215833580U - Short circuit detection device for power system - Google Patents
Short circuit detection device for power system Download PDFInfo
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- CN215833580U CN215833580U CN202121684776.1U CN202121684776U CN215833580U CN 215833580 U CN215833580 U CN 215833580U CN 202121684776 U CN202121684776 U CN 202121684776U CN 215833580 U CN215833580 U CN 215833580U
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Abstract
The utility model provides a short circuit detection device of an electric power system, which relates to the technical field of circuit detection and comprises the following components: a plurality of sub-detection modules, wherein the sub-detection modules comprise: the circuit breaker is respectively connected with the auxiliary contact of the first switch, the second contact of the test switch and the third contact of the test switch, the first contact of the test switch is connected with the power supply, and the fourth contact of the test switch is connected with the first indicator lamp; when the first contact and the second contact of the test switch of the first target sub-detection module are conducted and the first indicator lamp of the second target sub-detection module is turned on, the short circuit occurs in the line to be detected, and the technical problem that the switching-on misoperation under the condition of the short circuit is difficult to prevent in the prior art is solved.
Description
Technical Field
The utility model relates to the technical field of circuit detection, in particular to a short circuit detection device for an electric power system.
Background
Short circuits are a common electrical safety issue in power systems, where inter-phase short circuits are the most harmful. When a short circuit occurs in the power system, a large short circuit current flows at the short circuit point, so that a large electromotive force and a high temperature are generated, and serious consequences can be caused. The light weight will cause tripping and power loss. The stability of the power system is seriously affected, and serious accidents such as equipment damage, fire explosion, casualties and the like can be caused. Therefore, when the power system is switched on and power is transmitted in the case of a short circuit, serious consequences are caused.
Electric power operating personnel is at the transmission line that has a power failure in to electric power system, become, distribution equipment carries out the safety in-process such as production maintenance, technical improvement, reform and expand, for guaranteeing staff's personal safety, prevent the danger of sudden incoming telegram or induced voltage, avoid operating personnel to appear accidental injury such as electric shock, all install the earth connection in the side of probably coming telegram, electric power operating personnel is according to the working requirement, still need install the earth connection temporarily sometimes in the course of the work, operating personnel is overhauing, when experimental, need install some short-circuit wires in the course of the work according to the working requirement. The provision of these ground and shorting lines has the common result of shorting the conductive parts of the service test equipment or possibly the phases of the electrical equipment (bus bars, lines) to zero phase insulation.
After the related work is finished, the phenomena of mistaken interval ground wire dismounting, missed short wire dismounting and the like often occur due to the factors of unclear shift switching of operators, more installed ground wires, irregular management, improper system execution, illegal operation and negligence of workers and the like, and finally the phenomena of switch-on and power transmission under the condition of short circuit are caused to cause accidents. Therefore, closing with the ground wire (knife) is a typical phenomenon that the closing and power transmission cause the short circuit of the power system in the case of short circuit.
In recent years, most of the serious electrical accidents of the power system every year are caused by closing with a ground wire (a knife) (namely, closing under the condition of a short circuit). Very general and of the type of accident that requires a high degree of attention and thought to prevent. How to effectively prevent the switch-on and power transmission under the condition of short circuit such as a grounding wire (knife) and a short-circuit wire becomes a topic discussed by people.
Although each power grid management company establishes a strict management system, the vicious events of closing and power transmission under the condition of short circuit with a ground wire (knife), a short-circuit wire and the like still occur frequently, and the general reasons are that the responsibility of responsible personnel is not strong, the importance of safe production work and the severity of accident consequences are not well known, the execution of the safety management system is not in place, the site supervision is not in place and the like. However, these reasons are basically from the viewpoint of human factors and management, and people themselves have many uncertain factors, and the system also needs to be executed by people, which causes the system to be often executed in a poor and not strict way.
Although the probability of accidents can be reduced to a certain extent by strengthening the training and education on the quality of personnel and perfecting the management system, the accidents cannot be avoided. Only by strengthening the training education on the quality of personnel, perfecting the management system and combining corresponding technical means can the power supply can be effectively prevented from being switched on under the condition of short circuit of a grounding wire (knife), a short-circuit wire and the like, and the accidents can be prevented.
The existing measures for preventing the power transmission and the closing under the condition of short circuit of a grounding wire (knife), a short-circuit wire and the like mainly depend on the responsibility and the management system of workers. Namely, it is important to prevent and avoid from the viewpoint of human factors and management. Although the probability of accidents can be reduced to a certain extent by strengthening the training education of the personnel quality and perfecting the management system, the personnel themselves have a plurality of uncertain factors, such as: factors of staff quality, insufficient understanding of importance of safety production work and severity of accident consequences, individual emotion, mental state and the like all influence the working state and working responsibility of the staff, and the system is executed by people, so that the system is often executed in a non-position and non-strict manner. Therefore, the accidents can not be avoided only by strengthening the training education on the quality of the personnel and perfecting the management system, and an effective technical means is lacked.
No effective solution has been proposed to the above problems.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to a short circuit detection device for an electrical power system, so as to alleviate the technical problem that it is difficult to prevent the erroneous closing operation in the case of short circuit.
In a first aspect, an embodiment of the present invention provides an apparatus for detecting a short circuit in an electrical power system, including: a plurality of sub-detection modules, wherein the sub-detection modules comprise: the circuit testing device comprises an electrified sensor, an auxiliary contact of a first switch, a circuit breaker, a first indicator lamp, a testing switch and a power supply, wherein the primary side of the electrified sensor is connected with a line to be detected, the secondary side of the electrified sensor is connected with the auxiliary contact of the first switch, a normally closed auxiliary contact of the circuit breaker is respectively connected with the auxiliary contact of the first switch, a second contact of the testing switch and a third contact of the testing switch, the first contact of the testing switch is connected with the power supply, and a fourth contact of the testing switch is connected with the first indicator lamp; when a first contact and a second contact of a test switch of a first target sub-detection module are conducted and a first indicator lamp of a second target sub-detection module is turned on, a short circuit occurs in the line to be detected, wherein the first target sub-detection module is any one of the sub-detection modules, and the second target sub-detection module is any one of the sub-detection modules except the first target sub-detection module.
Further, the sub-detection module further includes: the circuit breaker comprises a normally open auxiliary contact of the circuit breaker, a first transformer, a second indicator light, a third indicator light, a first resistor and a second resistor, wherein the normally open auxiliary contact of the circuit breaker is respectively connected with a primary side of the electrified sensor, the auxiliary contact of the first switch and the second transformer, the second indicator light is respectively connected with the second transformer and the second indicator light, the first resistor is also connected with the first indicator light, the first transformer is respectively connected with a third contact of the test switch and the first indicator light, the third indicator light is respectively connected with a second contact of the test switch and a normally closed auxiliary contact of the circuit breaker, and the first resistor and the second resistor are grounded.
Further, the second indicator light is used for representing whether the sub-detection module is in a charged state or not; the third indicator light is used for representing whether the sub-detection module works normally or not.
Further, the power supply is used for providing safe voltage for the sub-detection module.
Further, if the line to be detected includes: and the number of the sub-detection modules is 3, namely, the A phase is connected with the first sub-detection module, the B phase is connected with the second sub-detection module, and the C phase is connected with the third sub-detection module.
Further, if the first target sub-detection module is the first sub-detection module, if a first indicator lamp of the second sub-detection module is turned on, a short circuit occurs between the phase a and the phase B; if a first indicator lamp of the third sub-detection module is turned on, a short circuit occurs between the phase A and the phase C; and if the first indicator light of the second sub-detection module is turned on and the first indicator light of the third sub-detection module is turned on, the phase A is short-circuited between the phase B and the phase C respectively.
Further, in a case that the first target sub-detection module is the second sub-detection module, if a first indicator lamp of the first sub-detection module is turned on, a short circuit occurs between the phase a and the phase B; if a first indicator lamp of the third sub-detection module is turned on, a short circuit occurs between the phase B and the phase C; and if the first indicator light of the first sub-detection module is turned on and the first indicator light of the third sub-detection module is turned on, the phase B is short-circuited between the phase A and the phase C respectively.
Further, if the first target sub-detection module is the third sub-detection module, if a first indicator lamp of the first sub-detection module is turned on, a short circuit occurs between the phase C and the phase a; if a first indicator light of the second sub-detection module is turned on, a short circuit occurs between the phase C and the phase B; and if the first indicator light of the first sub-detection module is lightened and the first indicator light of the second sub-detection module is lightened, the phase C is respectively short-circuited between the phase A and the phase B.
Further, the first switch is a trolley switch or an isolating switch.
Further, the apparatus further comprises: and the alarm is used for generating an alarm signal under the condition that the short circuit occurs in the line to be detected.
In an embodiment of the present invention, an apparatus for detecting a short circuit in an electrical power system includes: a plurality of sub-detection modules, wherein the sub-detection modules comprise: the circuit breaker comprises a charged sensor, an auxiliary contact of a first switch, a normally closed auxiliary contact of a circuit breaker, a first indicator lamp, a test switch and a power supply, wherein the primary side of the charged sensor is connected with a line to be detected, the secondary side of the charged sensor is connected with the auxiliary contact of the first switch, the normally closed auxiliary contact of the circuit breaker is respectively connected with the auxiliary contact of the first switch, a second contact of the test switch and a third contact of the test switch, the first contact of the test switch is connected with the power supply, and the fourth contact of the test switch is connected with the first indicator lamp; when a first contact and a second contact of a test switch of the first target sub-detection module are conducted and a first indicator lamp of the second target sub-detection module is turned on, a short circuit occurs in a line to be detected, wherein the first target sub-detection module is any one of the sub-detection modules, and the second target sub-detection module is any one of the sub-detection modules except the first target sub-detection module. According to the method, the characteristic that the phase insulation of the conductive part of the line to be detected is zero, namely the phase conduction is utilized, when the safety test voltage is applied to the secondary side of the charged sensor, the corresponding voltage can be detected on the primary side of the charged sensor, and the primary side of the charged sensor is connected with the conductive part of the electrical equipment. The live sensor is arranged on each phase of the conductive part of the equipment, when a short circuit phenomenon exists between phases of the conductive part of the equipment, the short circuit phase is conducted, so that the primary side of the other phase or the two-phase live sensor also has the same voltage, the live sensor reflects the voltage to the corresponding secondary side, and the short circuit phenomenon exists on the conductive part of the equipment, so that the short circuit fault can be visually reflected, the aim of prompting the short circuit fault is fulfilled, the aim of avoiding the misoperation of closing by a worker under the condition of short circuit is fulfilled, the technical problem that the misoperation of closing under the condition of short circuit is difficult to prevent is solved, and the technical effect of improving the safety of line maintenance is achieved.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a short-circuit detection device for an electrical power system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a sub-detection module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of another short-circuit detection device for an electrical power system according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
according to an embodiment of the present invention, there is provided a power system short circuit detection apparatus, and fig. 1 is a schematic diagram of a power system short circuit detection apparatus according to an embodiment of the present invention, as shown in fig. 1, the power system short circuit detection apparatus includes: a plurality of sub-detection modules, wherein the sub-detection modules comprise: the circuit breaker comprises an electrified sensor 10, an auxiliary contact 20 of a first switch, a normally closed auxiliary contact 30 of a circuit breaker, a first indicator lamp 40, a test switch 50 and a power supply 60, wherein the primary side of the electrified sensor is connected with a line to be detected, the secondary side of the electrified sensor is connected with the auxiliary contact of the first switch, the normally closed auxiliary contact of the circuit breaker is respectively connected with the auxiliary contact of the first switch, the second contact of the test switch and the third contact of the test switch, the first contact of the test switch is connected with the power supply, and the fourth contact of the test switch is connected with the first indicator lamp;
when a first contact and a second contact of a test switch of a first target sub-detection module are conducted and a first indicator lamp of a second target sub-detection module is turned on, a short circuit occurs in the line to be detected, wherein the first target sub-detection module is any one of the sub-detection modules, and the second target sub-detection module is any one of the sub-detection modules except the first target sub-detection module.
It should be noted that the first switch is generally a trolley switch or an isolating switch.
In an embodiment of the present invention, an apparatus for detecting a short circuit in an electrical power system includes: a plurality of sub-detection modules, wherein the sub-detection modules comprise: the circuit breaker comprises a charged sensor, an auxiliary contact of a first switch, a normally closed auxiliary contact of a circuit breaker, a first indicator lamp, a test switch and a power supply, wherein the primary side of the charged sensor is connected with a line to be detected, the secondary side of the charged sensor is connected with the auxiliary contact of the first switch, the normally closed auxiliary contact of the circuit breaker is respectively connected with the auxiliary contact of the first switch, a second contact of the test switch and a third contact of the test switch, the first contact of the test switch is connected with the power supply, and the fourth contact of the test switch is connected with the first indicator lamp; when a first contact and a second contact of a test switch of the first target sub-detection module are conducted and a first indicator lamp of the second target sub-detection module is turned on, a short circuit occurs in a line to be detected, wherein the first target sub-detection module is any one of the sub-detection modules, and the second target sub-detection module is any one of the sub-detection modules except the first target sub-detection module. According to the method, the characteristic that the phase insulation of the conductive part of the line to be detected is zero, namely the phase conduction is utilized, when the safety test voltage is applied to the secondary side of the charged sensor, the corresponding voltage can be detected on the primary side of the charged sensor, and the primary side of the charged sensor is connected with the conductive part of the electrical equipment. The live sensor is arranged on each phase of the conductive part of the equipment, when a short circuit phenomenon exists between phases of the conductive part of the equipment, the short circuit phase is conducted, so that the primary side of the other phase or the two-phase live sensor also has the same voltage, the live sensor reflects the voltage to the corresponding secondary side, and the short circuit phenomenon exists on the conductive part of the equipment, so that the short circuit fault can be visually reflected, the aim of prompting the short circuit fault is fulfilled, the aim of avoiding the misoperation of closing by a worker under the condition of short circuit is fulfilled, the technical problem that the misoperation of closing under the condition of short circuit is difficult to prevent is solved, and the technical effect of improving the safety of line maintenance is achieved.
In an embodiment of the present invention, as shown in fig. 2, the sub-detection module further includes: the circuit breaker comprises a normally open auxiliary contact 60 of the circuit breaker, a first transformer 70, a second transformer 80, a second indicator lamp 90, a third indicator lamp 100, a first resistor 110 and a second resistor 120, wherein the normally open auxiliary contact of the circuit breaker is respectively connected with the primary side of the charged sensor, the auxiliary contact of the first switch and the second transformer, the second indicator lamp is respectively connected with the second transformer and the second indicator lamp, the first resistor is also connected with the first indicator lamp, the first transformer is respectively connected with the third contact of the test switch and the first indicator lamp, the third indicator lamp is respectively connected with the second contact of the test switch and the normally closed auxiliary contact of the circuit breaker, and the first resistor and the second resistor are all grounded.
It should be noted that, in the embodiment of the present invention, the short circuit detection device of the power system may be connected to not only the line to be detected, but also a conductive portion or a bus of an electrical device.
In the embodiment of the utility model, before the short circuit detection is carried out by using the device, the device needs to be subjected to a maintenance test, and the specific process is as follows:
because each phase of the equipment conductive part (the bus or the line to be detected) is provided with the charged sensor, namely the equipment conductive part is connected with the primary side of the charged sensor, after the breaker is switched on, the equipment conductive part (the bus or each phase of the line) is in charged operation, the secondary side of the charged sensor has voltage, and after the breaker is switched on, the normally open auxiliary contact is closed, so that when the charged sensor has voltage for the second time, the second indicator lamp can be lightened, and the charged operation of the primary system is indicated. The test switching handle of the test switch is in the exit test position during normal operation.
In the embodiment of the present invention, as shown in fig. 3, if the line to be detected includes: and the number of the sub-detection modules is 3, namely, the A phase is connected with the first sub-detection module, the B phase is connected with the second sub-detection module, and the C phase is connected with the third sub-detection module.
Under the condition that the first target sub-detection module is the first sub-detection module, if a first indicator lamp of the second sub-detection module is turned on, a short circuit occurs between the phase A and the phase B;
if a first indicator lamp of the third sub-detection module is turned on, a short circuit occurs between the phase A and the phase C;
and if the first indicator light of the second sub-detection module is turned on and the first indicator light of the third sub-detection module is turned on, the phase A is short-circuited between the phase B and the phase C respectively.
Under the condition that the first target sub-detection module is the second sub-detection module, if a first indicator lamp of the first sub-detection module is turned on, a short circuit occurs between the phase A and the phase B;
if a first indicator lamp of the third sub-detection module is turned on, a short circuit occurs between the phase B and the phase C;
and if the first indicator light of the first sub-detection module is turned on and the first indicator light of the third sub-detection module is turned on, the phase B is short-circuited between the phase A and the phase C respectively.
Under the condition that the first target sub-detection module is the third sub-detection module, if a first indicator lamp of the first sub-detection module is turned on, a short circuit occurs between the phase C and the phase A;
if a first indicator light of the second sub-detection module is turned on, a short circuit occurs between the phase C and the phase B;
and if the first indicator light of the first sub-detection module is lightened and the first indicator light of the second sub-detection module is lightened, the phase C is respectively short-circuited between the phase A and the phase B.
The operation of the short-circuit detection device for an electric power system will be described with reference to fig. 3, and the specific operation process is as follows:
after the overhaul test is finished, the electric power operation personnel shake the trolley switch into the working position or switch on the isolating switch according to the operation procedure steps, the test switch handle of the test switch is driven to the test position (namely, the first contact and the second contact are conducted), and if the third indicator lamp is lightened, the sub-detection module is normal. At this time, the safety test voltage provided by the power supply is applied to the secondary side of the charged sensor, and due to the characteristics of the charged sensor, the corresponding voltage is extracted from the primary side of the charged sensor, and the primary side of the charged sensor is connected with the conductive part of the equipment, so the conductive part of the equipment has the voltage.
1. The test switch of the submodule of phase B, C tests the toggle handle in the exit test position with phase a tested (i.e., the first target sub-detection module is the first sub-detection module).
If the A phase and the B phase of the line to be detected have a short circuit phenomenon, the A phase and the B phase are insulated to be zero, namely the line is in a conducting state, the B phase and the A phase have the same voltage, the charged sensor of the B phase reflects the voltage to the secondary side of the charged sensor, and the first indicator lamp of the B phase is lightened, namely when the A phase is tested, if the first indicator lamp of the sub-detection module corresponding to the B phase is lightened, the A phase and the B phase of the line to be detected have a short circuit phenomenon; similarly, if the first indicator light of the sub-detection module corresponding to the phase C is turned on, it is indicated that the phase A and the phase C of the line to be detected have a short circuit phenomenon; similarly, if the first indicator light of the sub-detection module corresponding to B, C is turned on, it indicates that the phase a and the phase B and the phase C of the line to be detected are both short-circuited, i.e. a three-phase short-circuit.
2. The test switch of the submodule of phase A, C tests the toggle handle in the exit test position with phase B tested (i.e., the first target sub-detection module is the second sub-detection module).
If the first indicator light of the sub-detection module corresponding to the A is lightened, the short circuit phenomenon between the phase A and the phase B of the line to be detected is indicated; if the first indicator light of the sub-detection module corresponding to the phase C is lightened, the short circuit phenomenon between the phase B and the phase C of the line to be detected is indicated; if the first indicator lights of the sub-detection modules corresponding to A, C are all turned on, it indicates that there is a three-phase short circuit phenomenon in A, B, C of the line to be detected.
3. The test switch of the submodule of phase A, B tests the toggle handle in the exit test position with phase C tested (i.e., the first target sub-detection module is the third sub-detection module).
If the first indicator light of the sub-detection module corresponding to the A is lightened, the short circuit phenomenon between the A phase and the C phase of the line to be detected is indicated; if the first indicator light of the sub-detection module corresponding to the B is lightened, the short circuit phenomenon between the phase B and the phase C of the line to be detected is indicated; if the first indicator lights of the sub-detection modules corresponding to B, C are all turned on, it indicates that there is a three-phase short circuit phenomenon in A, B, C of the line to be detected.
It should be noted that, the short-circuit detection device for the power system in the embodiment of the present invention may use an indicator light to display the short-circuit phenomenon, and may also use technologies such as an amplifying circuit to access an alarm to form a display alarm module to display and alarm, or use a PLC to program and control the display and alarm to prompt the short-circuit phenomenon.
Besides the above manual test, the short circuit detection device of the power system in the embodiment of the utility model can also perform automatic detection, and automatically lock the closing loop when a short circuit exists. The principle of the method is that after a trolley switch is shaken into a working position or an isolating switch is switched on, a test switching handle of any test switch is switched to a test position, when the short circuit phenomenon in a line to be detected is monitored, an alarm and an indication are sent out through PLC programming control, and the circuit breaker is locked and switched on.
The electric power system short circuit detection device in the embodiment of the utility model has higher safety, and the electrified sensor is used in the utility model, so that the direct contact with the primary high-voltage electrified part and the primary low-voltage electrified part can be avoided, and the high voltage can be isolated from the electric working personnel. Because the testing and displaying alarm loop adopts the auxiliary contact of the electric loop, after the breaker is switched on, the short circuit detection device of the electric power system is automatically switched off, thereby avoiding false display or false alarm under the condition of live operation of primary equipment and also avoiding artificial misoperation of adding the testing voltage to the live sensor under the condition of live operation of the primary equipment. When the equipment is in a maintenance state, according to the standard requirement of electric power work, the trolley switch is in a test position or the isolating switch is in a disconnection position, so that a test loop is also disconnected, error display and false alarm caused by artificial misoperation can be avoided, and the influence on maintenance personnel can also be avoided. And the test voltage used by the utility model adopts safe voltage.
The short circuit detection device for the power system in the embodiment of the utility model has wide application range, can detect the short circuit phenomenon of a low-voltage system, and can also detect the short circuit phenomenon of a high-voltage system.
According to the short-circuit detection device for the power system, when a short circuit exists in a line to be detected, the short circuit can be displayed visually or an alarm can be given, and a closing loop can be closed under the condition of the short circuit through PLC programming control, so that the occurrence of closing accidents under the condition of the short circuit can be prevented more effectively.
The power system short circuit detection device in the embodiment of the utility model is simple to operate and has higher reliability. When closing and transmitting power, electric power workers can operate according to the drawn operation order according to steps, and as long as the test steps are written into the operation order when the operation order is drawn, and the detection is performed before the circuit breaker is closed, the short circuit condition of the conductive part of the equipment can be effectively detected before closing and transmitting power. When the conductive part of the equipment has a short circuit, the short circuit can be visually displayed or alarmed, and the closing loop can be locked under the condition of the short circuit through PLC programming control, so that the severe accident of closing under the condition of the short circuit can be more effectively avoided.
The power system short circuit detection device in the embodiment of the utility model has a live display function in normal time and is used for short circuit detection before closing and power transmission.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An electric power system short circuit detection device, comprising: a plurality of sub-detection modules, wherein the sub-detection modules comprise: the circuit breaker comprises an electrified sensor, an auxiliary contact of a first switch, a normally closed auxiliary contact of a circuit breaker, a first indicator light, a test switch and a power supply, wherein the primary side of the electrified sensor is connected with a line to be detected, the secondary side of the electrified sensor is connected with the auxiliary contact of the first switch, the normally closed auxiliary contact of the circuit breaker is respectively connected with the auxiliary contact of the first switch, the second contact of the test switch and the third contact of the test switch, the first contact of the test switch is connected with the power supply, and the fourth contact of the test switch is connected with the first indicator light;
when a first contact and a second contact of a test switch of a first target sub-detection module are conducted and a first indicator lamp of a second target sub-detection module is turned on, a short circuit occurs in the line to be detected, wherein the first target sub-detection module is any one of the sub-detection modules, and the second target sub-detection module is any one of the sub-detection modules except the first target sub-detection module.
2. The apparatus of claim 1, wherein the sub-detection module further comprises: the circuit breaker comprises a normally open auxiliary contact of the circuit breaker, a first transformer, a second indicator light, a third indicator light, a first resistor and a second resistor, wherein the normally open auxiliary contact of the circuit breaker is respectively connected with a primary side of the electrified sensor, the auxiliary contact of the first switch and the second transformer, the second indicator light is respectively connected with the second transformer and the second indicator light, the first resistor is also connected with the first indicator light, the first transformer is respectively connected with a third contact of the test switch and the first indicator light, the third indicator light is respectively connected with a second contact of the test switch and a normally closed auxiliary contact of the circuit breaker, and the first resistor and the second resistor are grounded.
3. The apparatus of claim 2,
the second indicator light is used for representing whether the sub-detection module is in a charged state or not;
the third indicator light is used for representing whether the sub-detection module works normally or not.
4. The apparatus of claim 1,
and the power supply is used for providing safe voltage for the sub-detection module.
5. The apparatus of claim 2, wherein if the line to be detected comprises: and the number of the sub-detection modules is 3, namely, the A phase is connected with the first sub-detection module, the B phase is connected with the second sub-detection module, and the C phase is connected with the third sub-detection module.
6. The apparatus of claim 5, wherein in the case that the first target sub-detection module is the first sub-detection module,
if a first indicator light of the second sub-detection module is turned on, a short circuit occurs between the phase A and the phase B;
if a first indicator lamp of the third sub-detection module is turned on, a short circuit occurs between the phase A and the phase C;
and if the first indicator light of the second sub-detection module is turned on and the first indicator light of the third sub-detection module is turned on, the phase A is short-circuited between the phase B and the phase C respectively.
7. The apparatus of claim 5, wherein in the case that the first target sub-detection module is the second sub-detection module,
if a first indicator light of the first sub-detection module is turned on, a short circuit occurs between the phase A and the phase B;
if a first indicator lamp of the third sub-detection module is turned on, a short circuit occurs between the phase B and the phase C;
and if the first indicator light of the first sub-detection module is turned on and the first indicator light of the third sub-detection module is turned on, the phase B is short-circuited between the phase A and the phase C respectively.
8. The apparatus of claim 5, wherein in the case that the first target sub-detection module is the third sub-detection module,
if a first indicator light of the first sub-detection module is turned on, a short circuit occurs between the phase C and the phase A;
if a first indicator light of the second sub-detection module is turned on, a short circuit occurs between the phase C and the phase B;
and if the first indicator light of the first sub-detection module is lightened and the first indicator light of the second sub-detection module is lightened, the phase C is respectively short-circuited between the phase A and the phase B.
9. The apparatus of claim 1,
the first switch is a trolley switch or an isolating switch.
10. The apparatus of claim 1, further comprising:
and the alarm is used for generating an alarm signal under the condition that the short circuit occurs in the line to be detected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121684776.1U CN215833580U (en) | 2021-07-22 | 2021-07-22 | Short circuit detection device for power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121684776.1U CN215833580U (en) | 2021-07-22 | 2021-07-22 | Short circuit detection device for power system |
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| CN215833580U true CN215833580U (en) | 2022-02-15 |
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