CN108666920B - PT handcart interlocking circuit, PT handcart and metering cabinet - Google Patents
PT handcart interlocking circuit, PT handcart and metering cabinet Download PDFInfo
- Publication number
- CN108666920B CN108666920B CN201810772241.6A CN201810772241A CN108666920B CN 108666920 B CN108666920 B CN 108666920B CN 201810772241 A CN201810772241 A CN 201810772241A CN 108666920 B CN108666920 B CN 108666920B
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- handcart
- travel switch
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- circuit
- trip
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- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/127—Withdrawal mechanism
- H02B11/133—Withdrawal mechanism with interlock
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention relates to a PT handcart interlocking circuit, a PT handcart and a metering cabinet. Whether the PT handcart is in two different states corresponding to the travel switch in the working position or not, when the PT handcart is in the working position, the travel switch does not act, a control coil of a tripping relay of the incoming line circuit breaker is powered off, and the incoming line circuit breaker does not trip; once the PT handcart is separated from the working position, the travel switch acts, a control coil of a tripping relay of the incoming line breaker is electrified, the incoming line breaker trips, and the incoming line end immediately stops supplying power. Through the simple interlocking circuit, the situation that the lower-level load still uses electricity but the electric energy cannot be measured is avoided, and the economic loss to the electric power department is avoided.
Description
Technical Field
The invention relates to a PT handcart interlocking circuit, a PT handcart and a metering cabinet.
Background
In high-low voltage power consumption systems, sometimes in order to accurately measure the power consumption, a measuring cabinet is often directly and independently arranged behind the incoming line switch cabinet for measuring the electric energy. In the power utilization system with the independent metering cabinet, in the power utilization process, if a voltage transformer handcart (PT handcart for short, the same applies hereinafter) in the metering cabinet can cause the PT handcart to leave the working position when the PT handcart breaks down or is pulled out by mistake by a person, so that the PT in the PT handcart is disconnected with the main loop, the condition that the lower-level load is still used but the electric meter indication in the metering cabinet is not increased can occur, and economic loss can be caused for an electric power department.
Disclosure of Invention
The invention aims to provide a PT handcart interlocking circuit, a PT handcart and a metering cabinet, which are used for solving the problem that when the PT handcart leaves a working position to disconnect PT in the PT handcart from a main loop, economic loss is caused for an electric power department.
In order to achieve the above object, the present invention includes the following technical solutions.
The utility model provides a PT handcart interlocking circuit, is including the control circuit that is used for setting up travel switch and the inlet wire circuit breaker on the PT handcart, travel switch's contact cluster is established on the control circuit, still cluster is equipped with the control coil of the tripping relay of inlet wire circuit breaker on the control circuit.
Whether the PT handcart is in two different states corresponding to the travel switch in the working position or not, when the PT handcart is in the working position, the travel switch does not act, a control coil of a tripping relay of the incoming line circuit breaker is powered off, and the incoming line circuit breaker does not trip; once the PT handcart is separated from the working position, the PT in the PT handcart is disconnected with the main loop, the travel switch acts, the control coil of the tripping relay of the incoming line breaker is electrified, the incoming line breaker trips, and the incoming line end immediately stops supplying power. Through the simple interlocking circuit, the situation that the lower-level load still uses electricity but the electric energy cannot be measured is avoided, the accurate correspondence between the metering value of the kilowatt-hour meter and the actual electric energy use condition is ensured, and the economic loss to the electric power department is avoided.
Further, the contact of the travel switch is connected with a manual tripping control branch in parallel, and a tripping button is connected in series on the manual tripping control branch. The tripping of the incoming line breaker can be controlled manually through the tripping button.
Further, a microcomputer control device is further arranged on the manual tripping control branch, the tripping button is connected with a signal input end of the microcomputer control device, and a signal output end of the microcomputer control device is connected with the control coil in an output mode. When the tripping button is pressed, the power supply is sent into the microcomputer control device, and after the judgment processing of the internal protection program of the microcomputer control device, a tripping signal is sent to the control coil, so that the incoming line breaker trips.
Further, the control coil is connected into the control loop through the plug and socket device, so that wiring is facilitated.
The utility model provides a PT handcart, includes PT handcart body and PT handcart interlocking circuit, PT handcart interlocking circuit is including setting up the control circuit of travel switch and inlet wire circuit breaker on the PT handcart, travel switch's contact cluster is established on the control circuit, the control circuit is last to still to be connected in series the control coil of the tripping relay who is equipped with inlet wire circuit breaker.
Further, the contact of the travel switch is connected with a manual tripping control branch in parallel, and a tripping button is connected in series on the manual tripping control branch.
Further, a microcomputer control device is further arranged on the manual tripping control branch, the tripping button is connected with a signal input end of the microcomputer control device, and a signal output end of the microcomputer control device is connected with the control coil in an output mode.
The utility model provides a metering cabinet, includes the PT handcart, the PT handcart includes PT handcart body and PT handcart interlocking circuit, PT handcart interlocking circuit is including setting up the travel switch and the control circuit of inlet wire circuit breaker on the PT handcart, travel switch's contact cluster is established on the control circuit, the last control coil who still clusters the trip relay who is equipped with the inlet wire circuit breaker of control circuit.
Further, the contact of the travel switch is connected with a manual tripping control branch in parallel, and a tripping button is connected in series on the manual tripping control branch.
Further, a microcomputer control device is further arranged on the manual tripping control branch, the tripping button is connected with a signal input end of the microcomputer control device, and a signal output end of the microcomputer control device is connected with the control coil in an output mode.
Drawings
FIG. 1 is a schematic diagram of a typical switchgear arrangement and operation;
fig. 2 is a schematic diagram of an interlock circuit of a PT cart and an incoming circuit breaker.
Detailed Description
Metering cabinet embodiment
The present embodiment provides a metering cabinet, which is applied to the arrangement and operation schematic diagram of the switch cabinet shown in fig. 1. As shown in fig. 1, the primary system includes one incoming line cabinet and two outgoing line cabinets, and a single metering cabinet is set up behind the incoming line cabinet. The wire inlet cabinet is internally provided with a wire inlet cabinet circuit breaker, namely a wire inlet circuit breaker. Partial parameters of primary system-main bus: TMY- (80X 8) single row; primary rated voltage: 12kV; secondary rated voltage: DC220V; switch cabinet model: KYN28A-12; number of switch cabinets: 4 sides. Since such a primary system is a conventional technology, it will not be described in detail herein.
The metering cabinet is internally provided with a PT handcart for collecting metering voltage signals, and the PT handcart comprises a PT handcart body and a PT handcart interlocking circuit, namely an interlocking circuit of the PT handcart and the incoming line circuit breaker. Because PT handcart body belongs to conventional technique, just will not be repeated here, the following focus carries out the concrete explanation with the interlock circuit of inlet wire circuit breaker to PT handcart.
The interlock circuit comprises a travel switch and a control loop of the incoming line circuit breaker, the travel switch is arranged on the PT handcart body, whether the PT handcart body is in two different states corresponding to the travel switch on the working position or not, and whether the PT handcart body is in the working position or not can be obtained by detecting the state of the travel switch. On the premise of meeting the detection function, the specific setting position of the travel switch is not limited. As shown in fig. 2, +km and-KM in the control loop of the incoming circuit breaker are dc power sources, and DK is an air switch. As shown in fig. 2, the contact S9 of the travel switch is connected in series to the control circuit, and the control circuit is also connected in series to the control coil TQ of the trip relay of the line breaker.
In order to be able to control the tripping of the line breaker manually, the contact S9 of the travel switch is arranged in parallel with a manual tripping control branch, which is provided with a tripping button TA in series. Further, the manual trip control branch is also provided with a microcomputer control device 1n, the trip button TA is connected with a signal input end of the microcomputer control device 1n, and a signal output end of the microcomputer control device 1n is output and connected with a control coil TQ, as shown in fig. 2. Of course, the manual trip control branch circuit can be only connected with the trip button TA in series, and the trip of the line breaker can be controlled manually. In addition, the control coil TQ is connected to the control circuit by the plug-and-socket device CZ, so that the control coil TQ located inside the circuit breaker can be conveniently communicated with the control circuit located outside the circuit breaker.
During normal operation, the air switch DK is closed, when the PT handcart in the metering cabinet is positioned at the working position, the travel switch does not act, the contact S9 of the travel switch is in an open state, if the wire inlet circuit breaker needs to be manually controlled to trip, the trip button TA needs to be pressed, the direct current power supply +KM is sent into the microcomputer control device 1n, and after being judged and processed by an internal protection program of the microcomputer control device 1n, the microcomputer control device 1n sends a trip signal to the control coil TQ, so that the wire inlet circuit breaker trips. When the PT handcart is separated from the working position, the travel switch acts, the contact S9 of the travel switch is immediately closed, the closed contact S9 can directly send the direct-current power supply +KM into the control coil TQ, so that the control coil TQ is electrified, and the incoming line breaker directly acts for tripping.
Specific embodiments are given above, but the invention is not limited to the described embodiments. The basic idea of the invention is that the above basic scheme, it is not necessary for a person skilled in the art to design various modified models, formulas, parameters according to the teaching of the invention to take creative effort. Variations, modifications, substitutions and alterations are also possible in the embodiments without departing from the principles and spirit of the present invention.
PT handcart examples
The present embodiment provides a PT cart, which will not be described in detail herein, since it has been described in detail in the above-described metering cabinet.
PT handcart interlocking circuit embodiment
The present embodiment provides a PT handcart interlocking circuit, which will not be described in detail herein since it has been described in detail in the above-described measuring cabinet.
Claims (10)
1. The utility model provides a PT handcart interlock circuit, its characterized in that, including the control circuit that is used for setting up travel switch and the inlet wire circuit breaker on the PT handcart, travel switch's contact cluster is established on the control circuit, still be equipped with the control coil of the tripping relay of inlet wire circuit breaker on the control circuit, travel switch is used for detecting whether the PT handcart is in working position, and when the PT handcart was in working position, travel switch is motionless, and travel switch's contact is in the disconnected state, and when the PT handcart breaks away from working position, travel switch acts, and travel switch's contact is closed immediately, the control coil of the tripping relay of inlet wire circuit breaker is used for getting electricity after travel switch's contact closure, makes the inlet wire circuit breaker trip.
2. The PT handcart interlocking circuit of claim 1, wherein contacts of the travel switch are arranged in parallel with a manual trip control branch on which trip buttons are serially arranged.
3. The PT handcart-interlocking circuit of claim 2, wherein a microcomputer control device is further provided on the manual trip control branch, the trip button is connected to a signal input terminal of the microcomputer control device, and a signal output terminal of the microcomputer control device is output-connected to the control coil.
4. A PT handcart interlock circuit according to claim 1, 2 or 3, wherein the control coil is connected to the control loop by plug-and-socket means.
5. The utility model provides a PT handcart, its characterized in that includes PT handcart body and PT handcart interlock circuit, PT handcart interlock circuit includes the control circuit of travel switch and wire inlet breaker who sets up on the PT handcart, travel switch's contact cluster is established on the control circuit, still be equipped with the control coil of wire inlet breaker's tripping relay on the control circuit in cluster, travel switch is used for detecting whether the PT handcart is in the working position, and when the PT handcart was in the working position, travel switch does not move, and travel switch's contact is in the disconnected state, and when the PT handcart broke away from the working position, travel switch moves, travel switch's contact is closed immediately, wire inlet breaker's tripping relay's control coil is used for getting electricity after the contact closure of travel switch, makes wire inlet breaker trip.
6. The PT handcart of claim 5, wherein the contacts of the travel switch are arranged in parallel with a manual trip control branch having a trip button connected in series.
7. The PT handcart of claim 6, wherein the manual trip control branch is further provided with a microcomputer control device, the trip button is connected to a signal input end of the microcomputer control device, and a signal output end of the microcomputer control device is output connected to the control coil.
8. The utility model provides a metering cabinet, includes PT handcart, its characterized in that, the PT handcart includes PT handcart body and PT handcart interlocking circuit, PT handcart interlocking circuit is including setting up travel switch and the control circuit of inlet wire circuit breaker on the PT handcart, travel switch's contact cluster is established on the control circuit, the control coil of the tripping relay of inlet wire circuit breaker that still is equipped with on the control circuit in cluster, travel switch is used for detecting whether the PT handcart is in the working position, and when the PT handcart was in the working position, travel switch is motionless, and travel switch's contact is in the off-state, and when the PT handcart breaks away from the working position, travel switch acts, travel switch's contact is closed immediately, the control coil of the tripping relay of inlet wire circuit breaker is used for obtaining electricity after travel switch's contact closure, makes the inlet wire circuit breaker trip.
9. The metering cabinet of claim 8, wherein the contacts of the travel switch are arranged in parallel with a manual trip control leg having a trip button in series therewith.
10. The metering cabinet of claim 9, wherein the manual trip control branch is further provided with a microcomputer control device, the trip button is connected with a signal input end of the microcomputer control device, and a signal output end of the microcomputer control device is output connected with the control coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810772241.6A CN108666920B (en) | 2018-07-13 | 2018-07-13 | PT handcart interlocking circuit, PT handcart and metering cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810772241.6A CN108666920B (en) | 2018-07-13 | 2018-07-13 | PT handcart interlocking circuit, PT handcart and metering cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108666920A CN108666920A (en) | 2018-10-16 |
| CN108666920B true CN108666920B (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810772241.6A Active CN108666920B (en) | 2018-07-13 | 2018-07-13 | PT handcart interlocking circuit, PT handcart and metering cabinet |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361167A (en) * | 2018-11-28 | 2019-02-19 | 国网河南省电力公司商丘供电公司 | 10kV/35kV middle-placed switch cabinet wheelbarrow switch travel switch moves device again |
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| CN102412516A (en) * | 2011-11-18 | 2012-04-11 | 安徽省电力公司滁州供电公司 | Operating method of handcart switch cabinet isolation baffle Z-shaped locking device |
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| Publication number | Publication date |
|---|---|
| CN108666920A (en) | 2018-10-16 |
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