CN207021570U - A kind of short-circuit device for preventing Current Transformer Secondary current open - Google Patents
A kind of short-circuit device for preventing Current Transformer Secondary current open Download PDFInfo
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- CN207021570U CN207021570U CN201720594634.3U CN201720594634U CN207021570U CN 207021570 U CN207021570 U CN 207021570U CN 201720594634 U CN201720594634 U CN 201720594634U CN 207021570 U CN207021570 U CN 207021570U
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Abstract
The utility model discloses a kind of short-circuit device for preventing Current Transformer Secondary current open, including the copper short circuit piece of L-shaped and insulation sleeve, the short side of insulation sleeve and the copper short circuit piece of L-shaped（I.e. compared with one side of small area）Area is adapted, and is set on the short side of the copper short circuit piece of L-shaped；The long side of the copper short circuit piece of L-shaped（That is one side of larger area）Distal edge along being equidistantly provided with four U-shaped screws, for insert corresponding A phase currents testing terminal in terminal block, B phase currents testing terminal, C phase currents testing terminal, at N phase current testing terminals, and the copper short circuit piece of L-shaped is fixed in corresponding terminal block with the screw tightening on testing terminal respectively.The short-circuit device is simple in construction, and the technological transformation applied to certain station failure wave recording device is changed, and using effect is good, stop completely without by the current transformer of operation, can realizes that secondary current is isolated, and reduces the frequency of power cut for changing power failure recorder, improves operating efficiency.
Description
Technical field
Power system energy control technical field is the utility model is related to, specifically one kind prevents that current transformer electric power is mutual
The short-circuit device of secondary current open circuit when sensor is run.
Background technology
At present, transformer station is more and more more than the protection equipment device of 12 years, and the technological transformation to protection equipment device is changed
Normality will be turned into, but new power demand does not allow large-area power-cuts occur, therefore, is changed to protection equipment device
When, the requirement that other intervals is not impacted also more and more higher.
There is a current transformer at each interval in transformer station, and the secondary side of current transformer has 4-6 group taps, point
It Yong Yu not protect, measure, measuring, the function use such as female poor, failure wave-recording, secondary current is opened during in order to prevent that electric power mutual-inductor from running
Road, directly in transformer body terminal box or at terminal box, short circuit gets up for remaining tap.Wherein protect, measure, metering
Three groups are served only for this line segregation, whole station spaced female difference and failure wave-recording be then respectively connected to public busbar protective device
And fault wave recording device.Therefore, when the busbar protective device in transformer station, fault wave recording device carry out technological transformation replacing, by
There is contacting for secondary current loop in all intervals in both apparatus and transformer station, carried out more to both devices
When changing, in the case where not allowing large area occur, it is most important to resolve the problem of current loop is opened a way.
Utility model content
《Electric power safety working regulation》（GB 26860-2011）Regulation：Current loop is forbidden to open a way.Mesh of the present utility model
Be situation for the apparatus changed and the apparatus being currently running how will be needed to keep apart, and provide a kind of
The short-circuit device that secondary current is opened a way when electric power mutual-inductor is run is prevented, the short-circuit device is rational in infrastructure, is stood applied to certain
The technological transformation of fault wave recording device is changed, and using effect is good, stops completely without by the current transformer of operation, it is possible to
Realize that secondary current is isolated, reduce the frequency of power cut for changing power failure recorder, improve operating efficiency.
Realizing the technical scheme of the utility model purpose is：
A kind of short-circuit device for preventing Current Transformer Secondary current open, including the copper short circuit piece of L-shaped and insulation sleeve, absolutely
Edge covers the short side with the copper short circuit piece of L-shaped（I.e. compared with one side of small area）Area is adapted, and is set in the short of the copper short circuit piece of L-shaped
Bian Shang；
The long side of the copper short circuit piece of L-shaped（That is one side of larger area）Distal edge along being equidistantly provided with four U-shaped spiral shells
Hole, for inserting corresponding A phase currents testing terminal, B phase currents testing terminal, C phase currents testing terminal, N phases in terminal block
At electric current testing terminal, and the copper short circuit piece of L-shaped is fixed on corresponding terminal block with the screw tightening on testing terminal respectively
On.
The long side of the copper short circuit piece of L-shaped（That is one side of larger area）Both sides be respectively equipped with annular ground hole, use
In dead earth line.
The ground wire uses the 4mm of tape insulation shell2Multiply copper flexible cord.If on the current loop being grounded
Short circuit, then ground wire need not be installed on short-circuit device；If the short circuit on the current loop of no ground wire, then need
Ground wire is installed, one end of ground wire is fixed at the annular ground hole of short-circuit device, and the other end, which is fixed on, to be connect on short-circuit device
On ground row.After being fixed with key screw ground wire, whole short-circuit device is grounded.
The copper short circuit piece of L-shaped respectively can connect A phase, B phase, C phase, N phase currents testing terminal, short for electric current
Connect.Now, A phases secondary current, B phases secondary current, C phases secondary current, N phase secondary currents form short circuit, do not have electric current stream
Enter, busbar protective device or fault wave recording device can be changed.
When the insulation sleeve prevents that human body from installing and removing short circuit piece, directly contact powered copper short circuit piece and get an electric shock.
There is a principle in short circuit current loop, connects short circuit dress at the testing terminal of current transformer side in terminal block
Put, the middle connection sheet being easy to open in terminal block, be easy to the device of replacing and the secondary loop of mutual inductor of operation is complete
Full isolation, wherein the ground hole in left side is used for the dead earth line in the left side short circuit of terminal block, the ground hole on right side is used for
Dead earth line during the right side short circuit of terminal block.
The utility model short-circuit device is simple and reasonable for structure, and the technological transformation applied to certain station failure wave recording device is changed,
Using effect is good, stops completely without by the current transformer of operation, it is possible to realizes that secondary current is isolated, reduces more
The frequency of power cut of power failure recorder is changed, improves operating efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model short-circuit device；
In figure：1. the U-shaped spiral shells of long side 1-3. of the short side 1-2. short circuit pieces of the copper short circuit piece 1-1. short circuit pieces of L-shaped
The insulation sleeve of hole 1-4 annular grounds hole 3..
Fig. 2 is current transformer connection diagram.
Fig. 3 is the implementation schematic diagram that the utility model short-circuit device is used to change fault wave recording device.
Embodiment
Content of the present utility model is described further with reference to embodiment and accompanying drawing, but is not to the utility model
Restriction.
Embodiment
Reference picture 1, a kind of short-circuit device for preventing Current Transformer Secondary current open, including the copper He of short circuit piece 1 of L-shaped
Insulation sleeve 3, insulation sleeve 3 are adapted with the short side 1-1 areas of the copper short circuit piece of L-shaped, are set in the short side 1- of the copper short circuit piece of L-shaped
On 1；
The long side 1-2 of the copper short circuit piece of L-shaped distal edge is along equidistantly four U-shaped screw 1-3 are provided with, for insertion end
A phase currents testing terminal, B phase currents testing terminal, C phase currents testing terminal, N phase current testing terminals corresponding to son row is upper
Place, and the copper short circuit piece 1 of L-shaped is fixed in corresponding terminal block with the screw tightening on testing terminal respectively.
The width 4mm of the U-shaped screw 1-3, external diameter width 10mm.
The long side 1-2 of the copper short circuit piece of L-shaped both sides are respectively equipped with annular ground hole 1-4, for dead earth line.
The ground wire uses the 4mm of tape insulation shell2Multiply copper flexible cord.If on the current loop being grounded
Short circuit, then ground wire need not be installed on short-circuit device；If the short circuit on the current loop of no ground wire, then need
Ground wire is installed, one end of ground wire is fixed at the annular ground hole of short-circuit device, and the other end, which is fixed on, to be connect on short-circuit device
On ground row.After being fixed with key screw ground wire, whole short-circuit device is grounded.
The thickness about 2mm of the copper short circuit piece 1 of L-shaped, A phase, B phase, C phase, N phase current testing terminals can be connect respectively
It is logical, for electric current short circuit.Now, A phases secondary current, B phases secondary current, C phases secondary current, N phase secondary currents form short circuit,
Electric current inflow is not had, can change busbar protective device or fault wave recording device.
Reference picture 2, interval M are connected on bus with interval P, and there is A phase, B phase, C phase at each interval, have one per phase
Current transformer, each current transformer have tap 1, tap 2, tap 3, and tap 1 uses to protection device, and tap 2 is to survey
Measure device to use, tap 3 uses to fault wave recording device, therefore the secondary current line that each spacing current transformer comes out has 6
Root, be A phases and N phases, B phases and N phases, C phases and N phases respectively, be respectively connecting at terminal block, then on the left of terminal block place by three
The N phases of phase converge to a N phase, and fault wave recording device is entered at terminal block right side has 4 lines, respectively A phases, B phases, C
Phase and N phases.
Reference picture 3, due to interval M and interval P be powered, when changing fault wave recording device, it is impossible to will interval M with
It is spaced N to have a power failure, then the A phase, B phase, C phase and N phases into the interval M of fault wave recording device are powered, into fault wave recording device
Interval P A phase, B phase, C phase and N phases it is also powered.According to《Electric power safety working regulation》[GB 26860-2011] is provided：Prohibit
Only current loop is opened a way.Therefore a kind of short-circuit device is needed to use to prevent secondary current from opening a way.
It is as follows using the utility model short-circuit device, specific embodiment：
The A phase studies terminal that four U-shaped screws of short-circuit device is inserted respectively interval M, the B phase studies terminal for being spaced M,
It is spaced M C phase studies terminal, is spaced M N phase study terminals, and is filled with the U-shaped screw of screw tightening at testing terminal, short circuit
Put and just secured.Now, electric current is by the short circuit of copper short circuit piece, and almost no electric current flows through fault wave recording device.Then beat
Connection sheet among the A phases at terminal block, connection sheet, C phases centre connection sheet, N phases centre connection sheet among B phases are opened, failure is recorded
Wave apparatus and the secondary current for being spaced M are completely isolated.Similarly, using short-circuit device by fault wave recording device with interval N it is secondary
Electric current is completely isolated.After all secondary currents for entering failure wave-recording are isolated, it is possible to remove old failure wave-recording dress
Put, new fault wave recording device is installed.
Claims (2)
- A kind of 1. short-circuit device for preventing Current Transformer Secondary current open, it is characterised in that：Including the copper short circuit piece of L-shaped and Insulation sleeve, insulation sleeve are adapted with the short side area of the copper short circuit piece of L-shaped, are set on the short side of the copper short circuit piece of L-shaped；The distal edge of the long side of the copper short circuit piece of L-shaped corresponds to along equidistantly four U-shaped screws are provided with, for inserting in terminal block A phase currents testing terminal, B phase currents testing terminal, C phase currents testing terminal, at N phase current testing terminals, and use respectively Screw tightening on testing terminal, the copper short circuit piece of L-shaped is fixed in corresponding terminal block.
- 2. short-circuit device according to claim 1, it is characterised in that：The both sides of the long side of the copper short circuit piece of L-shaped point Not She You annular ground hole, for dead earth line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720594634.3U CN207021570U (en) | 2017-05-25 | 2017-05-25 | A kind of short-circuit device for preventing Current Transformer Secondary current open |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720594634.3U CN207021570U (en) | 2017-05-25 | 2017-05-25 | A kind of short-circuit device for preventing Current Transformer Secondary current open |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207021570U true CN207021570U (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720594634.3U Active CN207021570U (en) | 2017-05-25 | 2017-05-25 | A kind of short-circuit device for preventing Current Transformer Secondary current open |
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| CN (1) | CN207021570U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572299A (en) * | 2018-05-21 | 2018-09-25 | 深圳供电局有限公司 | A kind of secondary loop of mutual inductor hybrid junction method of calibration |
-
2017
- 2017-05-25 CN CN201720594634.3U patent/CN207021570U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572299A (en) * | 2018-05-21 | 2018-09-25 | 深圳供电局有限公司 | A kind of secondary loop of mutual inductor hybrid junction method of calibration |
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