CN218122216U - Electrified device of checking of voltage loop - Google Patents
Electrified device of checking of voltage loop Download PDFInfo
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- CN218122216U CN218122216U CN202221019180.4U CN202221019180U CN218122216U CN 218122216 U CN218122216 U CN 218122216U CN 202221019180 U CN202221019180 U CN 202221019180U CN 218122216 U CN218122216 U CN 218122216U
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Abstract
The utility model discloses a voltage loop electrification checking device, which comprises an upper computer and a lower computer which are arranged in a matching way, wherein the upper computer is connected to the load side of the voltage loop through a test line, the lower computer is connected to the power supply side of the voltage loop through a pincerlike ammeter, and signal transmission is carried out between the upper computer and the lower computer through respective built-in signal transceivers; the upper computer is internally provided with an adjustable resistance part and is used for connecting a high-power resistor in parallel on a voltage loop to be checked, periodically changing the sampling of the power supply side by adjusting the size of the resistor and forming a fixed frequency component to be superposed in the original loop; the lower computer measures the current of the loop through the clamp-on ammeter and filters the current, specific frequency components are obtained, the detection result is fed back to the upper computer through the signal transceiver, and the upper computer displays data of the consistency of the voltage loop after receiving the feedback signal.
Description
Technical Field
The utility model relates to a in relay protection and measurement and control device technical field, concretely relates to device is checked to voltage circuit electrification.
Background
When a primary power switch is mistakenly opened during operation, the situations of misoperation, abnormal sampling, mistaken export of a control system and the like of the protection device can be caused, so that the primary power supply is generally not disconnected during the operation of the device. When the power supply is transformed, eliminated and repaired, the power supply of a higher level is always required to be isolated in a power failure mode, drawing errors, equipment identification errors, equipment interval mistakes caused by maintainers and the like occur, the power supply of other operation devices is easily mistakenly separated, or the PT secondary circuit in operation is mistakenly disassembled, so that electric power safety production accidents are caused, and great economic loss is caused. When the dc bus is overhauled, the inspection period is delayed because the correctness of the dc load power switch cannot be confirmed.
In summary, it is desirable to provide a method for checking the correctness of the dc power supply, the ac power supply loop and the PT secondary loop during operation of the relay protection device, the measurement and control device, the automatic device, etc. in an electrified manner, so as to avoid the occurrence of mistaken division of other switches during operation or mistaken disassembly of other PT secondary loops during operation.
Disclosure of Invention
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide characteristics such as safe and reliable, maneuverability is strong, application scope is wide, can accomplish the work of checking in this return circuit under the electrified condition in voltage return circuit, the device is checked in the electrified voltage return circuit that develops smoothly of guarantee maintenance, technical improvement and disappearance work.
The utility model aims at providing a voltage loop electrification checking device, which comprises an upper computer and a lower computer which are arranged in a matching way, wherein the upper computer is connected to the load side of a voltage loop through a test line, the lower computer is connected to the power supply side of the voltage loop through a pincerlike ammeter, and the upper computer and the lower computer transmit signals through respective built-in signal transceivers; the upper computer is internally provided with an adjustable resistance part and is used for connecting a high-power resistor in parallel on a voltage loop to be checked, the sampling of the power supply side is periodically changed by adjusting the size of the resistor, and a fixed frequency component is formed and superposed in the original loop; the lower computer measures the current of the loop through the clamp-on ammeter and carries out filtering on the current of the loop, after specific frequency components are obtained, the detection result is fed back to the upper computer through the signal transceiver, and the upper computer carries out data display on the consistency of the voltage loop after receiving the feedback signal.
The upper computer further comprises a single chip microcomputer, an input/output controller, a sampling plate, a human-computer interface, a power supply module and a voltage and current measuring part, wherein the output end of the input/output controller is electrically connected with the adjustable resistor part and drives the adjustable resistor part to adjust the resistance value, and an indicator lamp is connected to the input/output controller; the voltage and current measuring part is used for measuring the current and the voltage of the output loop and feeding back the detection result to the sampling plate.
Further, the lower computer comprises a single chip microcomputer, and a signal transceiver, a human-computer interface, a power module and a sampling plate which are respectively and electrically connected with the single chip microcomputer; the clamp ammeter is used for reading loop current on the power supply side.
Further, an output switch and a fuse are arranged at an output interface end of the upper computer, the output switch is used for switching on and switching off the parallel branch, and the fuse is used for limiting the current of the parallel branch so as to prevent the short circuit in the device or the sudden reduction of the resistance value of the parallel branch.
Furthermore, the adjustable resistor part adjusts the size of the output resistor according to an instruction sent by the input/output controller, the rated power of the resistor is not less than 500W, the adjustment range is 100-2000 omega, and the lower limit can select a fixed resistance resistor by using a jumper wire to prevent equipment damage accidents caused by short circuit of the variable resistor.
The utility model has the advantages of: voltage circuit check device can check the exactness of DC power supply, alternating current power supply return circuit and PT secondary circuit in the operation of equipment such as relay protection device, measuring and control device, automatics under the electrified circumstances of voltage circuit. The occurrence of electric power safety production accidents caused by mistaken breaking of power supply of other devices in operation and mistaken dismantling of PT secondary circuits in other operations due to drawing errors, equipment identification errors, wrong equipment intervals of maintainers and the like is avoided. Compared with the traditional method for checking the voltage loop in the power failure, the load power supply checking device provided by the invention can improve the checking efficiency and guarantee the continuous and reliable operation of equipment.
Drawings
FIG. 1 is a schematic view of the overall connection of the present invention;
fig. 2 is the composition schematic diagram of the upper computer of the utility model.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "lateral", "vertical", and the like are the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1-2, the device for checking the electrification of the voltage loop of the present invention comprises an upper computer 1 and a lower computer 2 which are arranged in a matching manner, wherein the upper computer 1 is connected to the load side of the voltage loop through a test line, the lower computer 2 is connected to the power side of the voltage loop through a clamp-on ammeter 3, and the upper computer 1 and the lower computer 2 transmit signals through respective built-in signal transceivers 4; and an alarm signal of 'connection failure of the upper computer and the lower computer' can be sent out when the communication is overtime. The upper computer 1 is internally provided with an adjustable resistance part 5, the upper computer 1 has the function of connecting a high-power resistor in parallel on a voltage loop needing to be checked according to the requirements of a system, and the sampling of the power supply side is periodically changed by adjusting the size of the resistor to form a fixed frequency component to be superposed in the original loop. The lower computer 2 measures the current of a loop through the pincerlike ammeter 3 and samples the current to filter, after specific frequency components are obtained, detection results are fed back to the upper computer 1 through the signal transceiver, the upper computer 1 displays data of the consistency of the voltage loop after receiving feedback signals, namely the upper computer 1 lights the indicator lamp 6 after confirming no errors, meanwhile, a signal of 'consistency checking' is sent out on the operation panel, and the load side and the power side of the loop are the same voltage loop.
When the upper computer and the lower computer cannot be connected due to environmental influence, the connection can be switched to manual operation, the load side input parallel resistance value can be manually adjusted at the moment, the original loop current is changed, the lower computer measures the power supply end current, and the consistency of the voltage loop is analyzed and confirmed by measuring the change of the current quantity.
Referring to fig. 1-2, the upper computer 1 further includes a single chip 7, an input/output controller 8, a sampling board 9, a human-machine interface 10, a power module 11, and a voltage/current measuring portion 12, the input/output controller 8 is connected to the single chip 7 and the indicator light 6, the single chip 7 can execute an operation program according to an instruction input by the human-machine interface 10, and the input of the human-machine interface 10 is a current increment and an amplitude fluctuation frequency. The singlechip 7 measures the loop voltage, analyzes and calculates the received instruction to obtain the resistance value needing to be connected in parallel, and drives the adjustable resistance part to change the resistance value of the parallel connection through the input and output controller 8; the input/output controller 8 is used for driving the adjustable resistance part and lightening the indicator lamp 6, and receiving an execution instruction input by the singlechip 7. The voltage and current measuring part 12 is used for measuring the current and the voltage of an output loop of the device and feeding the detection result back to the sampling plate 9, and the sampling precision is 0.2 level. The lower computer 2 comprises a singlechip 7, and a signal transceiver 4, a human-computer interface 10, a power module 11 and a sampling plate 9 which are respectively and electrically connected with the singlechip 7; the clamp-on ammeter is used for measuring the current of the lower computer 2, and the sampling precision of the clamp-on ammeter is 0.2 level. The signal transceiver 4 is used for establishing communication between the upper computer and the lower computer, and triggers 'failure alarm of connection between the upper computer and the lower computer' when the upper computer and the lower computer still do not establish communication after a certain time after the equipment is started. The sampling plate is used for measuring voltage and current on the loop, filtering the voltage and the current, obtaining components with specific frequency, and inputting the components into the singlechip for analysis and calculation. The man-machine interface is used for displaying and operating data. The power module is used for providing power required by various board cards.
Referring to fig. 2, an output interface end of the upper computer 1 is provided with an output switch SO1 and fuses FU1 and FU2, the output switch SO1 is used for switching on and off the parallel branches, and the fuses are used for limiting the current of the parallel branches to prevent the internal short circuit of the device or the resistance value of the parallel branches from being sharply reduced to cause the tripping of the idle development of the checking loop. The adjustable resistor part adjusts the size of the output resistor according to an instruction sent by the input and output controller, the rated power of the resistor is not less than 500W, the adjusting range is 100-2000 omega, and the lower limit can select a fixed resistance resistor by using a jumper wire to prevent equipment damage accidents caused by short circuit of the variable resistor.
Because the device is automatically connected and manually connected when in use, the operation steps of the device are also divided into automatic operation and manual operation, and the use steps when in automatic operation are as follows: (1) The upper computer is arranged to the load side, and the lower computer is arranged to the power supply side; (2) Checking and confirming that the resistance value of the upper computer variable resistance box is at the maximum value; (3) Setting the checking current value and the checking frequency of the upper computer, wherein the general current value can be set to be 60 mA; (4) checking that the numerical values of the voltmeter and the ammeter are zero; (5) Connecting an output interface of the upper computer and a voltage loop terminal to be tested by using a test wire; (6) At the moment, the upper computer automatically calculates the resistance value of the required parallel loop, and the resistance value of the variable resistance box is automatically adjusted to the required value; (7) Reading the loop current of the power supply side by using a lower computer pincerlike ammeter on the power supply side; (8) closing an output switch of the upper computer; (9) Clicking a starting button of the upper computer, automatically comparing the data on the two sides by the device, and sending a 'consistency check' signal and an electric quantity indicator lamp when the data on the two sides are consistent; (10) And (5) switching off an output switch of the upper computer, and automatically recovering parameters of the device for the next detection. And (11) finishing the test.
The steps used when performing manual operation are as follows: (1) The upper computer is arranged to the load side, and the lower computer is arranged to the power supply side; (2) Checking and confirming that the resistance value of the upper computer variable resistance box is at the maximum position; (3) checking that the numerical values of the voltmeter and the ammeter are zero; (4) Connecting an output interface of the upper computer and a voltage loop terminal to be tested by using a test wire; (5) Reading the loop current at the power supply side by using a lower computer pincerlike ammeter; (6) closing an output switch of the upper computer; (7) Manually adjusting the resistance value of the variable resistance box, gradually changing from large to small, reading the current values of the upper computer and the lower computer, and determining that the voltage loop is correct if the variable quantity is consistent; (8) The resistance value of the variable resistance box is adjusted back to the maximum value, and an output switch of the upper computer is switched off; and (9) finishing the test.
Voltage circuit check device can check the exactness of DC power supply, alternating current power supply return circuit and PT secondary circuit in the operation of equipment such as relay protection device, measuring and control device, automatics under the electrified circumstances of voltage circuit. The occurrence of electric power safety production accidents caused by mistaken breaking of power supply of other devices in operation and mistaken dismantling of PT secondary circuits in other operations due to drawing errors, equipment identification errors, wrong equipment intervals of maintainers and the like is avoided. Compared with the traditional method for checking the voltage loop in the power failure, the load power supply checking device provided by the invention not only can improve the checking efficiency, but also can guarantee the continuous and reliable operation of equipment.
The specific embodiments described herein are merely illustrative of the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.
Claims (5)
1. A voltage loop electrification checking device is characterized in that: the device comprises an upper computer and a lower computer which are arranged in a matched manner, wherein the upper computer is connected to the load side of a voltage loop through a test line, the lower computer is connected to the power supply side of the voltage loop through a pincer-shaped ammeter, and the upper computer and the lower computer carry out signal transmission through respective built-in signal transceivers; the upper computer is internally provided with an adjustable resistance part and is used for connecting a high-power resistor in parallel on a voltage loop to be checked, periodically changing the sampling of the power supply side by adjusting the size of the resistor and forming a fixed frequency component to be superposed in the original loop; the lower computer measures the current of the loop through the clamp-on ammeter and filters the current, specific frequency components are obtained, the detection result is fed back to the upper computer through the signal transceiver, and the upper computer displays data of the consistency of the voltage loop after receiving the feedback signal.
2. The voltage loop electrification checking apparatus according to claim 1, wherein: the upper computer also comprises a singlechip, an input-output controller, a sampling plate, a human-computer interface, a power supply module and a voltage and current measuring part, wherein the output end of the input-output controller is electrically connected with the adjustable resistance part and drives the adjustable resistance part to adjust the resistance value, and an indicator lamp is connected to the input-output controller; the voltage and current measuring part is used for measuring the current and the voltage of the output loop and feeding back the detection result to the sampling plate.
3. The voltage loop charge verification apparatus according to claim 1 or 2, wherein: the lower computer comprises a single chip microcomputer, and a signal transceiver, a man-machine interface, a power supply module and a sampling plate which are respectively and electrically connected with the single chip microcomputer; the clamp ammeter is used for reading loop current on the power supply side.
4. The voltage loop charge verification apparatus of claim 2, wherein: the output interface end of the upper computer is provided with an output switch and a fuse, the output switch is used for switching on and switching off the parallel branch, and the fuse is used for limiting the current of the parallel branch so as to prevent the occurrence of short circuit inside the device or the sudden reduction of the resistance value of the parallel branch.
5. The voltage loop charge verification apparatus of claim 2, wherein: the adjustable resistor part adjusts the size of the output resistor according to an instruction sent by the input/output controller, the rated power of the resistor is not less than 500W, the adjusting range is 100-2000 omega, and the lower limit can select a fixed resistance resistor by using a jumper wire to prevent equipment damage accidents caused by short circuit of the variable resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221019180.4U CN218122216U (en) | 2022-04-29 | 2022-04-29 | Electrified device of checking of voltage loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221019180.4U CN218122216U (en) | 2022-04-29 | 2022-04-29 | Electrified device of checking of voltage loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218122216U true CN218122216U (en) | 2022-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221019180.4U Active CN218122216U (en) | 2022-04-29 | 2022-04-29 | Electrified device of checking of voltage loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218122216U (en) |
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2022
- 2022-04-29 CN CN202221019180.4U patent/CN218122216U/en active Active
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