CN214310673U - Acquisition device for acquiring voltage from secondary side of voltage transformer - Google Patents
Acquisition device for acquiring voltage from secondary side of voltage transformer Download PDFInfo
- Publication number
- CN214310673U CN214310673U CN202023268975.2U CN202023268975U CN214310673U CN 214310673 U CN214310673 U CN 214310673U CN 202023268975 U CN202023268975 U CN 202023268975U CN 214310673 U CN214310673 U CN 214310673U
- Authority
- CN
- China
- Prior art keywords
- junction box
- switch
- secondary side
- voltage transformer
- box body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides a collecting device for acquiring voltage from the secondary side of a voltage transformer, which comprises a live-line test junction box; the live test junction box is arranged in the terminal box and comprises four input terminals and four output terminals; the input terminals are respectively connected with the three phases of the secondary side of the voltage transformer connected with the lightning arrester and the ground; the input terminal and the output terminal are communicated in phase; the four output terminals are connected with the live tester. The utility model discloses well collection system sets up and directly links wire with the voltage transformer secondary side in the terminal box, has realized that the opening device switch can acquire voltage transformer secondary side voltage signal, and the contact and the short circuit risk that the wiring caused when having avoided detecting at every turn.
Description
Technical Field
The utility model belongs to the technical field of power equipment, concretely relates to acquire collection system of voltage from voltage transformer secondary side.
Background
The transformer substation is provided with voltage transformers with different voltage grades for metering and protecting devices. When an electrical test, particularly an electrified test of the lightning arrester is carried out, a voltage signal is required to be taken from the secondary side of the bus voltage transformer and is used as a reference value to judge whether the resistive current of the lightning arrester exceeds a limit value or not, and further judge whether the interior of the lightning arrester is aged or damped or not. Because the distance between the secondary side terminals of the voltage transformer is very small, the terminals are easily short-circuited by frequently wiring the secondary side terminals of the voltage transformer, and explosion accidents of the voltage transformer are caused. In addition, the secondary side voltage of the voltage transformer is 58V at the lowest, and exceeds 24V human body safety voltage, so that in conclusion, due to safety conditions, the voltage is rarely taken from the secondary side of the voltage transformer when the lightning arrester is subjected to live test at the present stage, and the live test error is sometimes up to 20%.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a solve the secondary side that easily short circuit, voltage height, the high problem of error when acquireing voltage from voltage transformer secondary side and acquire collection system of voltage.
The utility model has the specific technical scheme that the acquisition device acquires voltage from the secondary side of the voltage transformer and is characterized in that the acquisition device comprises a live-line test junction box;
the live test junction box is arranged in the terminal box and comprises a junction box body and a switch cover plate; one side of the junction box body is provided with a four-phase input terminal, and the opposite side is provided with a four-phase output terminal;
the four-phase input terminal is respectively connected with A, B, C phases on the secondary side of a voltage transformer connected with the lightning arrester and the ground; the four-phase output terminal is connected with a belt electric tester and respectively outputs A, B, C phases on the secondary side of the voltage transformer and the ground; the input terminal and the output terminal are mutually communicated in pairs according to the phase sequence;
the junction box body is also provided with a main switch which is a relay, a primary side switch of the relay is arranged on the front surface of the junction box body, and a secondary side of the relay is respectively arranged on a line between the input terminal and the output terminal;
the switch cover plate is a transparent insulating cover plate and is connected with the junction box body through a hinge; and a main switch closing contact is also arranged on the switch cover plate, the position of the main switch closing contact is matched with the position of the relay primary side switch, and the relay primary side switch is triggered when the switch cover plate is closed.
Furthermore, a switch is arranged between the input terminal and the output terminal of each phase, and the switch is arranged on the front face of the junction box body.
Furthermore, an indicator light is arranged between the input terminal and the output terminal of each phase, and the indicator light is arranged on the front face of the junction box body.
Furthermore, the input terminal and the output terminal are sequentially arranged on the junction box body from top to bottom according to the sequence of A, B, C and the ground, and are respectively provided with colors of yellow, green, red and black for distinguishing.
The utility model has the advantages that:
the utility model discloses well collection system sets up in voltage transformer terminal box to with voltage transformer secondary side direct connection, open the device switch after output terminal is connected with the electrified tester and can directly acquire voltage transformer secondary side voltage; the voltage transformer overcomes the defects that in the prior art, the secondary voltage in the wiring between the live tester and the secondary side of the voltage transformer is higher than the safe voltage, the safety of workers is threatened, and the wiring is easy to be short-circuited to damage the voltage transformer; meanwhile, the defect that in work, testers can only use the voltage provided by the self-simulation of the instrument as a reference for testing and the error of the live test is increased is avoided.
The utility model discloses well electric test terminal box has the switch apron that sets up the relay contact, only after confirming wiring and closed apron, the electric test terminal box just acquires the voltage of voltage transformer secondary side, has further protected operation personnel's personal safety.
Drawings
Fig. 1 is a schematic structural view of a live test junction box in a collecting device for acquiring voltage from a secondary side of a voltage transformer according to the present invention;
fig. 2 is a schematic diagram of a closed switch cover plate of a live test junction box in a collecting device for acquiring voltage from a secondary side of a voltage transformer of the present invention;
fig. 3 is the circuit schematic diagram of the utility model relates to a live test terminal box in the collection system who obtains voltage from the voltage transformer secondary side.
Wherein, 1-junction box body, 11-input terminal, 12-output terminal, 13-switch, 14-indicator light, 15-main switch, 2-switch cover plate and 21-main switch closing contact.
Detailed Description
The following describes the present invention with reference to the accompanying drawings 1-3.
The utility model discloses in a acquire collection system of voltage from voltage transformer secondary side, this collection system includes electrified test terminal box.
As shown in fig. 1-3, in one embodiment, the live test junction box comprises a rectangular parallelepiped junction box body 1 with an insulated housing, and the live test junction box is arranged in a terminal box at the secondary side of a voltage transformer; one side of the junction box body 1 is provided with A, B, C, N four-phase input terminals 11; the opposite side of the input terminal on the junction box body 1 is provided with four-phase output terminals 12 including a, b, c and n; A. b, C, N four input terminals 11 and four output terminals 12 a, b, c and n are mutually communicated according to the phase sequence; the input terminal 11 and the output terminal 12 communicating with each other are provided at the same height of the junction box body 1. A. B, C, N four input terminals 11 are respectively connected with A, B, C three phases output by the secondary side of the voltage transformer and the ground, four phase output terminals 12 of a, b, c and n are connected with the live tester and are used for outputting A, B, C three phases output by the secondary side of the voltage transformer and the electric signal of the ground; the live test junction box can obtain voltages from the secondary side A, B, C three phases of the voltage transformer simultaneously, and can also obtain voltages from the three phases respectively; A. b, C the input terminal 11 and the output terminal 12 of the three phases and the ground are sequentially arranged on the junction box body 1 from top to bottom, and are respectively distinguished by yellow, green, red and black.
A selection switch 13 and an indicator light 14 are connected in series between each group of input terminals 11 and output terminals 12, the switch 13 and the indicator light 14 are both arranged on the front surface of the junction box body 1 and are arranged on the height matching judgment positions of the input terminals 11 and the output terminals 12 connected with the switch 13 and the indicator light 14; the switch 13 is used for realizing a closed loop between the input terminal 11 and the output terminal 12 where the switch is located, and is used for controlling the voltage of the secondary side of any one or more phases of the voltage transformer to be transmitted to the live tester for detection; indicator light 14 is used to indicate that the loop is closed and passed by the voltage signal.
The junction box body 1 is also provided with a main switch 15, the main switch 15 is a relay, a primary side switch is arranged on the front side of the junction box body 1, and a secondary side switch is respectively arranged on a line between the input terminal 11 and the output terminal 12; the secondary side of the relay is normally kept in a normally open state, so that the circuits between the input terminals 11 and the output terminals 12 of all phases are disconnected, and the danger caused by the electrification of the electrified test junction box due to operation errors is prevented; and after all preparation work, wiring and acquisition phase selection are finished, triggering the primary side switch to close the secondary side of the relay, and realizing that a path is formed between an input terminal 11 and an output terminal 12 of any phase selected by each switch 13.
The live-line test junction box is matched with the main switch 15, and further comprises a switch cover plate 2, the switch cover plate 2 is connected with the junction box body 1 through a hinge, and the front side of the junction box body 1 can be covered in a closed state; switch cover plate 2 is transparent insulating cover plate for observe the operating condition of pilot lamp 14 and junction box body 1, be equipped with master switch closed contact 21 on the switch cover plate 2, master switch closed contact 21 position and master switch 15 once side switch position phase-match, can make master switch closed contact 21 trigger master switch 15 and make the relay secondary side closed when closed switch cover plate 2, thereby realize closed insulating cover plate and guarantee that the staff keeps away from electrified test junction box just realizes final switching on behind the dangerous voltage of voltage transformer secondary side.
The utility model discloses the concrete application method of well collection system is as follows:
all switch buttons of the live-line test junction box are disconnected, the input terminal 11 and the output terminal 12 are connected, a certain phase or multi-phase switch 13 needing to be detected is closed after the input terminal 11 and the output terminal 12 are checked to be correct, the switch cover plate 2 is closed, the main switch closing contact 21 triggers the relay secondary side of the main switch 15 to be closed when the switch cover plate 2 is closed, the loop connection between the input terminal 11 and the output terminal 12 is achieved, meanwhile, the indicator lamp 14 is lightened to indicate that the loop is connected, and the live-line test can be carried out. After the test is finished, the switch cover plate 2 is opened firstly, the secondary side of the relay of the main switch 15 is normally opened, the switch 13 is disconnected, and then the wiring is removed. By using the live test junction box, short-circuit accidents and electric shock accidents caused by frequent operation of the secondary side of the voltage transformer can be avoided.
Although the present invention has been described in connection with the preferred embodiments, the embodiments are not intended to limit the present invention. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the present invention. The scope of protection of the invention should therefore be determined with reference to the claims that follow.
Claims (4)
1. An acquisition device for acquiring voltage from a secondary side of a voltage transformer is characterized by comprising a live test junction box;
the live test junction box is arranged in the terminal box and comprises a junction box body (1) and a switch cover plate (2); one side of the junction box body (1) is provided with a four-phase input terminal (11), and the opposite side is provided with a four-phase output terminal (12);
the four-phase input terminal (11) is respectively connected with A, B, C phases on the secondary side of a voltage transformer connected with a lightning arrester and the ground; the four-phase output terminal (12) is connected with a belt tester and respectively outputs A, B, C phases on the secondary side of the voltage transformer and the ground; the input terminal (11) and the output terminal (12) are mutually communicated in pairs according to a phase sequence;
the junction box body (1) is further provided with a main switch (15), the main switch (15) is a relay, a primary side switch of the relay is arranged on the front surface of the junction box body (1), and a secondary side of the relay is arranged on a line between the input terminal (11) and the output terminal (12) respectively;
the switch cover plate (2) is a transparent insulating cover plate and is connected with the junction box body (1) through a hinge; and a main switch closing contact (21) is further arranged on the switch cover plate (2), the position of the main switch closing contact (21) is matched with the position of the relay primary side switch, and the relay primary side switch is triggered when the switch cover plate (2) is closed.
2. The collecting device according to claim 1, characterized in that a switch (13) is arranged between the input terminal (11) and the output terminal (12) of each phase, and the switch (13) is arranged on the front surface of the junction box body (1).
3. The collecting device according to claim 1, characterized in that an indicator light (14) is arranged between the input terminal (11) and the output terminal (12) of each phase, and the indicator light (14) is arranged on the front surface of the junction box body (1).
4. The collecting device according to claim 1, wherein the input terminal (11) and the output terminal (12) are sequentially arranged on the junction box body (1) from top to bottom in the sequence of A, B, C and the ground, and are respectively arranged with colors of yellow, green, red and black for distinguishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023268975.2U CN214310673U (en) | 2020-12-30 | 2020-12-30 | Acquisition device for acquiring voltage from secondary side of voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023268975.2U CN214310673U (en) | 2020-12-30 | 2020-12-30 | Acquisition device for acquiring voltage from secondary side of voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214310673U true CN214310673U (en) | 2021-09-28 |
Family
ID=77819589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023268975.2U Active CN214310673U (en) | 2020-12-30 | 2020-12-30 | Acquisition device for acquiring voltage from secondary side of voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214310673U (en) |
-
2020
- 2020-12-30 CN CN202023268975.2U patent/CN214310673U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101659945B1 (en) | Test terminal block all-in-one test terminal unit and distributing board used in it | |
| CN101403779B (en) | Parameter measuring apparatus and system for high tension power line | |
| CN103792505A (en) | Ground fault simulation device for electric power direct current system | |
| CN201893540U (en) | Intelligent radio network dispatching digital-type boundary controller complete equipment | |
| CN201327509Y (en) | High-voltage transmission line parameter measuring device and system thereof | |
| CN104133152B (en) | DC detecting device during single-phase earthing of small current earthing system | |
| CN214310673U (en) | Acquisition device for acquiring voltage from secondary side of voltage transformer | |
| CN205666607U (en) | Small -size intelligent earth -leakage protector | |
| CN102024364A (en) | Simulated training system | |
| CN109521311B (en) | Relay protection multi-outlet pressing plate measuring instrument | |
| CN203543694U (en) | High voltage power distribution control device | |
| CN214750646U (en) | Power distribution network broken wire grounding test device | |
| CN110426595B (en) | Ring network unit primary and secondary loop fault detection device | |
| CN211627693U (en) | Portable automatic phase sequence detection device | |
| CN106099871B (en) | Protective device for power grid | |
| CN201955971U (en) | Simulation training system | |
| KR102128036B1 (en) | Arc protection system and method to control arc protection system | |
| CN110441608B (en) | Three-phase four-wire online ground insulation detection device and detection method for power grid isolator | |
| CN106597208A (en) | Breaker failure start loop detection device and method | |
| CN112180894A (en) | Electric performance detection device for pole-mounted circuit breaker controller | |
| CN113990132A (en) | Power transformation and distribution operation and maintenance integrated practical training system and practical training method | |
| CN106501558A (en) | A kind of safe mode of connection during electric power transmission line parameter testing | |
| CN110780127A (en) | Portable automatic phase sequence detection device | |
| CN214310674U (en) | Voltage acquisition device for lightning arrester live-line tester | |
| CN107681648B (en) | A kind of power of alterating and direct current partition method being shorted test for substation secondary |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |