CN214958687U - Device for conveniently processing interphase short circuit - Google Patents
Device for conveniently processing interphase short circuit Download PDFInfo
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- CN214958687U CN214958687U CN202023196756.8U CN202023196756U CN214958687U CN 214958687 U CN214958687 U CN 214958687U CN 202023196756 U CN202023196756 U CN 202023196756U CN 214958687 U CN214958687 U CN 214958687U
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Abstract
The utility model discloses a device for convenient processing alternate short circuit, including three single-pole double-throw switch for connect ABC three-phase generating line respectively, be qualified for the next round of competitions and the earth, every single-pole double-throw switch jumps the generating line and makes when being qualified for the next round of competitions and being connected and be qualified for the next round of competitions and switch on with the earth: the interphase short circuit identification module is used for detecting whether interphase short circuit occurs on the outgoing line and judging a fault phase; and the control module controls the single-pole double-throw switch to act according to the identification result of the interphase short circuit identification module. The device can conveniently realize the conduction of one fault phase and the grounding of the other fault phase when an interphase short-circuit fault occurs, thereby creating conditions for the rapid processing of the interphase short-circuit fault.
Description
Technical Field
The utility model relates to a power supply system fault handling device field, concretely relates to a device for handling alternate short circuit.
Background
At present, the problems of complex operation, untimely operation, inaccurate positioning and the like exist in the processing of interphase short circuit faults of a power supply system, and the power supply quality is influenced. The invention patent application 202011492758.3 and the invention patent application 202011453632.5 provide a method for handling an inter-phase short circuit in a power supply system, according to which, when an inter-phase short circuit occurs, a faulty phase is maintained to be conducted and the remaining faulty phases are tripped, then the other faulty phase is grounded, a live phase is grounded to form a closed loop with the two faulty phases connected through the short circuit and generate a current or a current pulse, and then the current duration or the current pulse number is detected by a controlled switch and tripped to remove the fault. In practice, there are many implementations for maintaining a failed phase conductive and tripping the remaining failed phases, and achieving the above objective quickly by the device is a technical problem that the art is expected to solve.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a device for handling alternate short circuit, the device can conveniently realize switching on of a trouble looks and the ground connection of another trouble looks when taking place alternate short circuit fault to create the condition for alternate short circuit fault's fast processing.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an apparatus for facilitating handling of interphase shorts, comprising:
the three single-pole double-throw switches are used for being respectively connected with an ABC three-phase bus, an outgoing line and the ground, and each single-pole double-throw switch is connected with the outgoing line while the outgoing line is conducted with the ground:
the interphase short circuit identification module is used for detecting whether interphase short circuit occurs on the outgoing line and judging a fault phase;
and the control module controls the single-pole double-throw switch to act according to the identification result of the interphase short circuit identification module.
Preferably, the device further comprises a current pulse detection module, and the control module can control the single-pole double-throw switch to trip out the connection between the outgoing line and the bus according to the detection result of the current pulse detection module.
Preferably, the device further comprises a current duration detection module, and the control module can control the single-pole double-throw switch to trip out the connection between the outgoing line and the bus according to the detection result of the current duration detection module.
Preferably, an adjustable resistor is connected between the single-pole double-throw switch and the ground in series.
Preferably, the interphase short circuit identifying module detects whether an interphase short circuit occurs in the three-phase power supply system and judges a fault phase through a hardware circuit.
Preferably, the single pole double throw switch comprises:
the bus contact is used for being connected with a bus;
a line contact for connecting with a line;
the grounding contact is used for being connected with the ground;
the actuating mechanism is used for conducting the line contact with the bus contact or the grounding contact;
and the driving mechanism is used for driving the actuating mechanism to move.
Preferably, the actuating mechanism comprises a conductive connecting rod, one end of the conductive connecting rod is electrically hinged with the line contact, and the other end of the conductive connecting rod is provided with a movable contact which is used for being connected with the bus contact or the grounding contact; the driving mechanism is a spring energy storage mechanism for driving the connecting rod to move.
The utility model has the advantages that: by arranging the three single-pole double-throw switches, grounding can be realized when the line and the bus are cut off, and the line and the bus can be kept conducted through one single-pole double-throw switch. The control module can enable two phases or three phases to be grounded while maintaining the conduction of a fault phase and a bus when two phases or three phases are in short circuit on the basis of the identification of the phase-to-phase short circuit identification module, lays a foundation for the subsequent injection current duration or current pulse in the phase-to-phase short circuit fault treatment, and effectively improves the speed and quality of the phase-to-phase short circuit fault treatment. Compared with the invention patent applications 202011492758.3 and 202011453632.5 in which a breaker is used for controlling the on-off of the outgoing line and the bus, and an independent switch is matched to realize grounding, the device has the two-in-one function, simple structure and cost saving.
Drawings
Fig. 1 is a schematic view of the structure and the connection of the present invention.
Detailed Description
The invention will be further explained by means of specific embodiments with reference to the accompanying drawings:
as shown in fig. 1, the device for processing interphase short circuit includes three single-pole double-throw switches 1, each single-pole double-throw switch 1 includes a bus contact 101 for connecting a bus, a line contact 102 for connecting an outgoing line, and a ground contact 103 for connecting a ground. The circuit contact 102 is electrically hinged with a conductive connecting rod 104, the other end of the conductive connecting rod 104 is provided with a movable contact 105, the conductive connecting rod 104 can swing to enable the movable contact 105 to be respectively connected with the bus contact 101 or the grounding contact 103, so that the single-pole double-throw switch 1 is in an initial state of conducting the bus and the outgoing line, and after tripping, the conduction of the bus and the outgoing line is cut off, and the outgoing line is conducted with the ground. The conductive linkage 104 may be driven by a spring-loaded mechanism (which is prior art and not shown). The device for processing the interphase short circuit further comprises an interphase short circuit identification module 2 and a control module 3, wherein the interphase short circuit identification module 2 detects whether the interphase short circuit occurs in the three-phase power supply system and judges a fault phase through a hardware circuit, and also detects whether the interphase short circuit occurs in the three-phase power supply system and judges the fault phase through a CPU and a digital-to-analog conversion circuit (both the prior art). The control module 3 controls the single-pole double-throw switch to act according to the identification result of the interphase short circuit identification module 2:
when the two phases AB are in short circuit, the phase A outgoing line is maintained to be conducted with the bus, and the connection between the phase B outgoing line and the bus is tripped off, so that the phase B outgoing line is conducted with the ground (in a preferred embodiment, the phase A is maintained to be conducted with the bus and the two phases BC are tripped off and grounded at the same time); or maintaining the conduction of the B-phase outgoing line and the bus, and tripping off the connection of the A-phase outgoing line and the bus to enable the A-phase outgoing line to be conducted with the ground (in a preferred embodiment, maintaining the conduction of the B-phase and the bus and simultaneously tripping off the AC two phases and grounding);
when the AC two-phase interphase short circuit occurs, the A-phase outgoing line is maintained to be conducted with the bus, and the connection between the C-phase outgoing line and the bus is tripped off to enable the C-phase outgoing line to be conducted with the ground (in a preferred embodiment, the A-phase outgoing line is maintained to be conducted with the bus and the CB two-phase outgoing line is tripped off and grounded at the same time); or the C-phase outgoing line is maintained to be conducted with the bus, and the connection between the A-phase outgoing line and the bus is tripped off to enable the A-phase outgoing line to be conducted with the ground (in a preferred embodiment, the C-phase outgoing line is maintained to be conducted with the bus and the AB two phases are tripped off simultaneously and grounded);
when the two BC phases are in short circuit, maintaining the conduction of the B-phase outgoing line and the bus, and tripping off the connection of the C-phase outgoing line and the bus to conduct the C-phase outgoing line and the ground (in a preferred embodiment, maintaining the conduction of the B-phase and the bus and simultaneously tripping off the two CA phases and grounding); or the C-phase outgoing line is maintained to be conducted with the bus, and the connection between the B-phase outgoing line and the bus is tripped off to enable the B-phase outgoing line to be conducted with the ground (in a preferred embodiment, the C-phase outgoing line is maintained to be conducted with the bus and the BA two phases are tripped off simultaneously to be grounded);
when the ABC three-phase interphase short circuit occurs, the conduction of the phase A outgoing line and the bus is maintained, and the connection of the phase BC outgoing line and the bus is broken, so that the phase BC outgoing line is conducted with the ground; or the conduction of the B-phase outgoing line and the bus is maintained, and the connection of the AC two-phase outgoing line and the bus is broken off so that the AC two-phase outgoing line is conducted with the ground; or the C-phase outgoing line is kept to be conducted with the bus, and the connection between the AB two-phase outgoing line and the bus is broken off, so that the AB two-phase outgoing line is conducted with the ground.
The device for processing interphase short circuit further comprises a current pulse detection module (or a current detection duration module) 5, and the control module 3 can control the single-pole double-throw switch 1 to jump off the connection between the fault phase and the bus according to the detection result of the current pulse detection module 5, so that the device can automatically cut off the connection between the fault phase and the bus according to the current pulse number (or the current duration) (namely, the device can function as a controlled switch to eliminate the interphase short circuit fault, see patent application 202011492758.3 and patent application 202011453632.5).
In a preferred embodiment, an adjustable resistor 4 is connected in series between the single-pole double-throw switch 1 and the ground. The adjustable resistor 4 is an adjustable resistor box, the resistance value is determined by calculation according to the voltage and current values during the interphase short circuit, and the adjustable resistor box comprises a resistor calculation module and an adjustable resistor controller.
The utility model provides a control module's function can adopt the singlechip to realize, is prior art.
The device is also used in the same way for interphase short circuit and the attachment of a ground fault at a short-circuit point.
In a preferred embodiment, the single-pole double-throw switches of each outgoing line share an adjustable resistance box when grounded.
In particular, the bus contacts in a single pole double throw switch may also be connected directly to the power supply.
The above embodiments are only a few descriptions of the concept and implementation of the present invention, and are not intended to limit the scope of the present invention.
Claims (8)
1. An apparatus for facilitating handling of interphase shorts, characterized by comprising:
the three single-pole double-throw switches are used for being respectively connected with an ABC three-phase bus, an outgoing line and the ground, and each single-pole double-throw switch is connected with the outgoing line while the outgoing line is conducted with the ground:
the interphase short circuit identification module is used for detecting whether interphase short circuit occurs on the outgoing line and judging a fault phase;
and the control module controls the single-pole double-throw switch to act according to the identification result of the interphase short circuit identification module.
2. The device for conveniently processing interphase short-circuit according to claim 1, further comprising a current pulse detection module, wherein the control module can control the single-pole double-throw switch to trip off the connection between the outgoing line and the bus according to the detection result of the current pulse detection module.
3. The device for conveniently processing the interphase short circuit according to claim 1, further comprising a current duration detection module, wherein the control module can control the single-pole double-throw switch to trip off the connection between the outgoing line and the bus according to the detection result of the current duration detection module.
4. The device for conveniently handling interphase short-circuits according to any one of claims 1 to 3, characterized in that an adjustable resistor is connected in series between the single-pole double-throw switch and ground.
5. The apparatus for conveniently handling an inter-phase short circuit according to claim 1, wherein the inter-phase short circuit recognition module detects whether an inter-phase short circuit occurs in a three-phase power supply system and determines a fault phase through a hardware circuit.
6. The apparatus for conveniently treating an inter-phase short circuit according to claim 1,
the single pole double throw switch includes:
the bus contact is used for being connected with a bus;
a line contact for connecting with a line;
the grounding contact is used for being connected with the ground;
the actuating mechanism is used for conducting the line contact with the bus contact or the grounding contact;
and the driving mechanism is used for driving the actuating mechanism to move.
7. The apparatus for conveniently treating an inter-phase short circuit according to claim 6,
the actuating mechanism comprises a conductive connecting rod, one end of the conductive connecting rod is electrically hinged with the line contact, and the other end of the conductive connecting rod is provided with a movable contact which is used for being connected with the bus contact or the grounding contact; the driving mechanism is a spring energy storage mechanism for driving the conductive connecting rod to move.
8. The apparatus according to claim 4, wherein each of said single-pole double-throw switches on different outgoing lines share the same adjustable resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023196756.8U CN214958687U (en) | 2020-12-28 | 2020-12-28 | Device for conveniently processing interphase short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023196756.8U CN214958687U (en) | 2020-12-28 | 2020-12-28 | Device for conveniently processing interphase short circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214958687U true CN214958687U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023196756.8U Active CN214958687U (en) | 2020-12-28 | 2020-12-28 | Device for conveniently processing interphase short circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214958687U (en) |
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2020
- 2020-12-28 CN CN202023196756.8U patent/CN214958687U/en active Active
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