CN215728737U - Multifunctional auxiliary device for line parameter test - Google Patents
Multifunctional auxiliary device for line parameter test Download PDFInfo
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- CN215728737U CN215728737U CN202120918131.3U CN202120918131U CN215728737U CN 215728737 U CN215728737 U CN 215728737U CN 202120918131 U CN202120918131 U CN 202120918131U CN 215728737 U CN215728737 U CN 215728737U
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Abstract
The utility model relates to a multifunctional auxiliary device for a circuit parameter test, which comprises a base and a protective cover; the protective cover is connected with the base in a buckling manner; the four corners of the bottom of the base are provided with composite rubber wheels, the top of the base is provided with three voltage dividing capacitors, three vacuum contactors and three current transformers in parallel, and a three-phase digital display current voltmeter is arranged inside the base; the top of the voltage dividing capacitor is provided with a binding post, the top of a vacuum arc extinguish chamber of the vacuum contactor is provided with a disconnecting link switch which can be contacted with the binding post, the current transformer is sleeved on a three-phase insulating connecting rod at the bottom of the vacuum contactor, and the voltage dividing capacitor, the vacuum contactor and the current transformer are connected with a three-phase digital display current voltmeter in the base. The utility model can monitor the line induction current and the induction voltage, provides a protection function, and avoids serious damage to human bodies and equipment caused by overhigh induction voltage under the condition of overhigh induction voltage, thereby ensuring the safety of test equipment and personnel.
Description
Technical Field
The utility model relates to the technical field of high-voltage tests of power transmission lines, in particular to a multifunctional auxiliary device for a line parameter test.
Background
With the gradual development of the power industry, more and more newly built and improved extension lines are continuously put into operation. Line induced voltage has high influence on line parameter insulation resistance, nuclear phase test and parameter test; if the line induction voltage is more than or equal to 3000V, high risks are brought to testers and test equipment due to overhigh induction voltage, and insulation resistance, nuclear phase test and parameter test cannot be carried out; only an application for an accompanying stop, wherein the line accompanying stop comprises: parallel lines, multiple circuits on the same tower, or cross-over lines. Therefore, the influence of the operation mode of the power system and the power failure on users is involved, and along with more and more towers and lines, a large number of lines are parallelly erected and erected in the same tower in a double-circuit mode or crossed and spanned, so that the voltage level of the induction voltage is greatly improved.
Traditional vacuum contactor can only be simple realization circuit ground function, and the induced voltage grade of unable monitoring circuit can't provide protect function, and under the too high condition of induced voltage, the induced voltage can cause very serious injury to human body and equipment, to the current condition, urgently needed to make the improvement to traditional vacuum contactor to guarantee test equipment and personnel's safety.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a multifunctional auxiliary device for a line parameter test.
The technical scheme adopted by the utility model is as follows:
a multifunctional line parameter test auxiliary device is integrally of a box structure and comprises a base and a protective cover; the protective cover covers the base and is connected with the base in a buckling mode, and handles are arranged on two sides of the protective cover; the base is of a box structure, four corners of the bottom of the base are provided with composite rubber wheels, the top of the base is provided with three voltage-dividing capacitors, three vacuum contactors and three current transformers in parallel, and the base is internally provided with a grounding external lead measuring terminal, a three-phase digital display current voltmeter, an overcurrent protection idle switch, an emergency stop/manual on-off button, an indicator light and a power socket which are connected with the three-phase digital display current voltmeter; the voltage dividing capacitor top is equipped with the terminal, and vacuum contactor's vacuum interrupter's top is equipped with the switch that can contact with the terminal, and current transformer suit is on the three-phase insulation connecting rod of vacuum contactor bottom, and voltage dividing capacitor, vacuum contactor and current transformer are connected with the three-phase digital display current voltmeter in the base, and voltage dividing capacitor's low pressure arm draws measuring terminal ground connection outward through the ground, and vacuum contactor and current transformer pass through three-phase short circuit ground connection terminal and ground connection terminal ground connection.
Preferably, still be equipped with the lithium cell in the base, the lithium cell is connected with three-phase digital display current voltmeter, and the lithium cell is equipped with battery power output socket.
Preferably, the lithium battery is connected with the three-phase digital display current voltmeter through a remote local change-over switch, and the remote local change-over switch is connected with the emergency stop/manual on-off button through a wireless connection module.
The utility model has the beneficial effects that:
the multifunctional line parameter test auxiliary device is provided with three voltage-dividing capacitors, three vacuum contactors and three current transformers, wherein the three voltage-dividing capacitors are connected with the inlet side and the outlet side of the vacuum contactor in parallel, and the high-voltage capacitance and the low-voltage capacitance of the capacitive voltage divider are used for measuring the induced voltage value of a line. Considering that the induction voltage is less than or equal to 10000V, the low-voltage arm voltage measurement range of a voltage division capacitor is 400-0V, the capacitance of each phase of high-voltage arm is 83.3nF, the capacitance of each phase of low-voltage arm is 2 mu F, and the ratio of each phase voltage is 10000:400V, the interphase voltage value is respectively displayed through a three-phase digital display current voltmeter, and an interphase and line-to-line voltage value can also be measured by connecting an earthed external lead measurement terminal to a universal meter. Three current transformers are sleeved on a three-phase insulating connecting rod at the bottom of the vacuum contactor, the current transformation ratio is selected as 100:5A according to the parameters considering that the induced current is usually less than or equal to 50A in a line parameter test, and the induced current value of each phase and the induced current value of three phases entering the ground are respectively displayed through a three-phase digital display current voltmeter. Before the multifunctional line parameter test auxiliary device performs a line parameter test, the induction voltage value of the current line can be monitored in real time by accessing the line; if the voltage is less than 10000V, the equipment can be accessed for testing; if this value is exceeded, personal safety and equipment safety must be taken into account.
In addition, the multifunctional line parameter test auxiliary device can be manually controlled or remotely controlled. A control loop of the remote control system is provided with a remote local change-over switch and a wireless connection module, and a remote control function can be realized through a mobile phone. Meanwhile, the lithium battery is arranged, the lithium battery can be used for performing a circuit parameter test without being connected with a power supply under the condition of power supply, personnel can operate within a certain distance range, and emergency can be remotely switched on and off, so that the safety guarantee of field operators is greatly improved. When the field construction power consumption is complicated, and when all kinds of large capacity consumer are more, power quality is often relatively poor, and is great to the field test's influence, and the lithium cell can supply power to this multi-functional circuit parameter test auxiliary device except, also can supply power for other test equipment, exports stable 220V, 500wW DC power supply, under the circumstances of guaranteeing that the experiment is not disturbed, has saved the process of on-the-spot overlap joint power, and is not only safe but also high-efficient. This experimental auxiliary device of multi-functional circuit parameter still is equipped with overcurrent overvoltage protection, when being surveyed circuit induced current too big or breaking down, can amputate equipment from the circuit of inserting fast, furthest reduces test equipment and tester's safety risk.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the connection of a voltage divider capacitor, a vacuum contactor and a current transformer according to the present invention;
FIG. 3 is a diagram of the connection circuit within the base of the present invention;
fig. 4 is a connection circuit diagram of a voltage dividing capacitor, a vacuum contactor and a current transformer according to the present invention;
in the figures 1-2, 1-base, 2-protective cover, 3-buckle, 4-handle, 5-composite rubber wheel, 6-voltage-dividing capacitor, 7-vacuum contactor, 8-current transformer, 9-grounding external leading measuring terminal, 10-three-phase digital display current voltmeter, 11-overcurrent protection idle switch, 12-emergency stop/manual on-off button, 13-indicator light, 14-power socket, 15-binding post, 16-vacuum arc-extinguishing chamber, 17-knife switch, 18-three-phase short circuit grounding binding post, 19-grounding binding post, 20-battery power output socket, 21-remote local change-over switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 to 4, the multifunctional auxiliary device for line parameter test of the present invention has a box structure as a whole, and comprises a base 1 and a protective cover 2; the protective cover 2 covers the base 1 and is connected with the base 1 through a buckle 3, and handles 4 are arranged on two sides of the protective cover 2; the base 1 is of a box structure, four corners of the bottom of the base are provided with composite rubber wheels 5, the top of the base is provided with three voltage dividing capacitors 6, three vacuum contactors 7 and three current transformers 8 in parallel, and the base is internally provided with a grounding external lead measuring terminal 9, a three-phase digital display current voltmeter 10, and an overcurrent protection idle switch 11, an emergency stop/manual on-off button 12, an indicator lamp 13 and a power socket 14 which are connected with the three-phase digital display current voltmeter 10; the top of the voltage division capacitor 6 is provided with a binding post 15, the top of a vacuum arc extinguish chamber 16 of the vacuum contactor 7 is provided with a disconnecting link switch 17 which can be contacted with the binding post 15, a current transformer 8 is sleeved on a three-phase insulating connecting rod at the bottom of the vacuum contactor 7, the voltage division capacitor 6, the vacuum contactor 7 and the current transformer 8 are connected with a three-phase digital display current voltmeter 10 in the base 1, a low-voltage arm of the voltage division capacitor 6 is grounded through a grounding external leading measuring terminal 9, and the vacuum contactor 7 and the current transformer 8 are grounded through a three-phase short circuit grounding binding post 18 and a grounding point binding post 19.
On the basis of the technical scheme, the multifunctional line parameter test auxiliary device can still perform line parameter test when no power supply is connected. The base 1 is also internally provided with a lithium battery, the lithium battery is connected with the three-phase digital display current voltmeter 10, and the lithium battery is provided with a battery power supply output socket 20. In addition, in order that personnel can operate this experimental auxiliary device of multi-functional circuit parameter within a certain distance range, emergency can long-range deciliter, has improved on-the-spot operating personnel's safety guarantee. The lithium battery can be further connected with the three-phase digital display current voltmeter 10 through a remote local change-over switch 21, and the remote local change-over switch 21 is connected with the emergency stop/manual on-off button 12 through a wireless connection module.
The working principle of the multifunctional line parameter test auxiliary device is as follows:
after a line is newly built and modified, when the multifunctional line parameter test auxiliary device is used for line parameter testing, firstly, a line side grounding switch of a transformer substation on two sides of the line is closed under a scheduling order, and then a line side grounding switch of the transformer substation is closed; the three-phase line test line of the line test terminal is led to the binding post 15 on the top of the voltage dividing capacitor 6. After the work is completed, the multifunctional circuit parameter test auxiliary device is connected into a power supply through a power socket 14, after an indicator lamp 13 is lighted, a manual on-off button is started, a low-voltage arm of a voltage division capacitor 6 is grounded through a grounding external lead measuring terminal 9, a vacuum contactor 7 and a current transformer 8 are grounded through a three-phase short circuit grounding terminal 18 and a grounding terminal 19, and then a transformer substation operator is informed to separate a scheduling application line side grounding switch. At this time, the voltage and current values shown on the three-phase digital display current voltmeter 10 can be observed, and in addition, a universal meter can be connected to the grounding external lead measurement terminal 9 to measure the line voltage and the phase voltage between the phases.
After the grounding switch on the line side is separated, the grounding current is checked through the three-phase digital display current voltmeter 10, and if the value of the induced current is larger, the value of the induced voltage is higher. When the manual on-off button is turned off and the disconnecting switch 17 at the top of the vacuum contactor 7 is turned on, the circuit state is as follows: the head end is suspended, the tail end is grounded through the vacuum contactor 7, and the induced voltage can be read out through the three-phase digital display current voltmeter 10. If the induced voltage is larger, personal safety and whether conditions for performing a line parameter test are met need to be considered.
In addition, when the site operation power consumption is complicated, when all kinds of large capacity consumer are more, power quality is often relatively poor, influence to the site test is great, can adopt the lithium cell as the power this moment, this experimental auxiliary device of multi-functional circuit parameter is by external power supply, can charge the lithium cell, when no external power supply, battery power output socket 20 through the lithium cell also can supply power for other test equipment, output stable 220V, 500wW DC power supply, under the circumstances that the assurance test is not disturbed, the process of on-the-spot overlap joint power supply has been saved, and is safe and high-efficient. Meanwhile, the multifunctional circuit parameter test auxiliary device further has a remote control function, during remote control, the remote local change-over switch 21 is screwed to the remote side, meanwhile, a loop automatically accesses the lithium battery, the WIFI sent by the wireless connection module is connected to the mobile phone end, and the emergency stop/manual on-off button 12 is controlled remotely by the mobile phone to realize on-off of the multifunctional circuit parameter test auxiliary device.
Claims (3)
1. The utility model provides a experimental auxiliary device of multi-functional circuit parameter which characterized in that: the multifunctional auxiliary device for the line parameter test is integrally of a box body structure and comprises a base and a protective cover; the protective cover covers the base and is connected with the base in a buckling mode, and handles are arranged on two sides of the protective cover; the base is of a box structure, four corners of the bottom of the base are provided with composite rubber wheels, the top of the base is provided with three voltage-dividing capacitors, three vacuum contactors and three current transformers in parallel, and the base is internally provided with a grounding external lead measuring terminal, a three-phase digital display current voltmeter, an overcurrent protection idle switch, an emergency stop/manual on-off button, an indicator light and a power socket which are connected with the three-phase digital display current voltmeter; the voltage dividing capacitor top is equipped with the terminal, and vacuum contactor's vacuum interrupter's top is equipped with the switch that can contact with the terminal, and current transformer suit is on the three-phase insulation connecting rod of vacuum contactor bottom, and voltage dividing capacitor, vacuum contactor and current transformer are connected with the three-phase digital display current voltmeter in the base, and voltage dividing capacitor's low pressure arm draws measuring terminal ground connection outward through the ground, and vacuum contactor and current transformer pass through three-phase short circuit ground connection terminal and ground connection terminal ground connection.
2. The multifunctional line parameter test auxiliary device of claim 1, wherein: still be equipped with the lithium cell in the base, the lithium cell is connected with three-phase digital display current voltmeter, and the lithium cell is equipped with battery power output socket.
3. The multifunctional line parameter test auxiliary device of claim 2, wherein: the lithium battery is connected with the three-phase digital display current voltmeter through the remote local change-over switch, and the remote local change-over switch is connected with the emergency stop/manual on-off button through the wireless connection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918131.3U CN215728737U (en) | 2021-04-29 | 2021-04-29 | Multifunctional auxiliary device for line parameter test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918131.3U CN215728737U (en) | 2021-04-29 | 2021-04-29 | Multifunctional auxiliary device for line parameter test |
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| CN215728737U true CN215728737U (en) | 2022-02-01 |
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| CN202120918131.3U Active CN215728737U (en) | 2021-04-29 | 2021-04-29 | Multifunctional auxiliary device for line parameter test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616444A (en) * | 2022-09-26 | 2023-01-17 | 国网山东省电力公司淄博供电公司 | Auxiliary grounding device for power transmission line parameter test |
-
2021
- 2021-04-29 CN CN202120918131.3U patent/CN215728737U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616444A (en) * | 2022-09-26 | 2023-01-17 | 国网山东省电力公司淄博供电公司 | Auxiliary grounding device for power transmission line parameter test |
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