CN205945023U - Terminal arrangement that opens a way is prevented to current transformer root - Google Patents
Terminal arrangement that opens a way is prevented to current transformer root Download PDFInfo
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- CN205945023U CN205945023U CN201621014560.3U CN201621014560U CN205945023U CN 205945023 U CN205945023 U CN 205945023U CN 201621014560 U CN201621014560 U CN 201621014560U CN 205945023 U CN205945023 U CN 205945023U
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- current transformer
- root
- voltage
- terminal
- delay relay
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- 238000005070 sampling Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a terminal arrangement that opens a way is prevented to current transformer root, include: root secondary terminal box, including the multiunit terminal, the first end of every group terminal is connected with current transformer's a pair of electricity of being qualified for the next round of competitions, and the second end is connected with current transformer collection accuse case electricity, delay relay includes a pair of normally open contact who connects in parallel on each group of current transformer is qualified for the next round of competitions, the voltage sample mutual -inductor is connected with root secondary terminal box's a pair of access terminal electricity, and voltage comparing module, include sampling input of being connected with voltage sample mutual -inductor electricity and the output of being connected with the delay relay electricity, wherein, the output is connected with the delay relay electricity for closed normally open contact when current transformer opens a way. The utility model discloses whether the directness utilizes every group of voltage sample mutual -inductor detection voltage mutual -inductor to be qualified for the next round of competitions and opens a way, and then triggers delay relay's normally open contact closure, forces the short circuit with root secondary terminal box's a pair of access terminal, realizes preventing the purpose of opening a way.
Description
Technical field
The utility model is related to a kind of anti-open terminal device of current transformer root.
Background technology
During current transformer normal work, due to impedance very little, close to short-circuit condition, magnetizing force produced by primary current
Major part is compensated by secondary current, and less, the anti-open circuit potential of secondary coil is also little for total magnetic flux density.
When current transformer is opened a way, impedance infinitely increases, and secondary current is equal to zero, pays magnetizing force and is equal to zero, total magnetization
Power is equal to primary winding magnetizing force.Produce very high potential in secondary coil, its peak value, up to several kilovolts, threatens personal safety, or
Cause instrument, protection device, transformer secondary insulating damage.Another aspect primary winding magnetizing force makes iron core magnetic flux density excessively increase
Greatly, cause iron core strongly overheated and damage.
Require according to current operation, the secondary side of current transformer is forbidden to open a way, but this is only to prevent from management
Open a way in Current Transformer Secondary side, can not technically prevent at all, and therefore, having to compare provides one kind to prevent current transformer
The measure of secondary side open circuit.
Utility model content
The purpose of this utility model is to provide a kind of current transformer root anti-open terminal device, technically to prohibit
Only root terminal open circuit.
For this reason, the utility model provides a kind of anti-open terminal device of current transformer root, including：Root is secondary to be connect
Line box, including multigroup terminal, the first end of every group of terminal is electrically connected with a pair of outlet of described current transformer, described every group of end
Second end of son is electrically connected with described current transformer central console；Time-delay relay, including being connected in parallel on each of current transformer
A pair of normally opened contact in group outlet；Voltage sample transformer, is electrically connected with access side of described root secondary terminal box
Connect；And voltage comparison module, continue including the sampling input electrically connecting with described voltage sample transformer with described time delay
The output end of electrical equipment electrical connection, wherein, described output end is electrically connected with described time-delay relay, in described current transformer
Described normally opened contact is closed during open circuit.
Further, the anti-open terminal device of above-mentioned current transformer root also includes connecting to described voltage comparison module
Output end alarm.
Further, above-mentioned alarm includes buzzer and/or LED light.
Further, above-mentioned current transformer includes 9 groups of outlets, and described root secondary terminal box includes 9 groups with upper terminal.
Further, above-mentioned time-delay relay, voltage sample transformer and described voltage comparison module are arranged on described
In portion's secondary terminal box.
Further, above-mentioned voltage comparison module is voltage comparator.
According to the anti-open terminal device of current transformer root of the present utility model, by root secondary terminal box so that
The easy-to-connect of time-delay relay and voltage sample device is reliable, when open circuit situation in one group of outlet of voltage transformer, one
Voltage between group outlet increases, and sample information is fed back to voltage comparison module by voltage sample transformer, higher than tactile
During the pressure that generates electricity, voltage comparison module controls the normally opened contact closure of time-delay relay, by a pair of access of root secondary terminal box
Terminal forces short circuit, technically realizes secondary side terminal anti-open circuit purpose.
In addition to objects, features and advantages described above, the utility model also has other purposes, feature and excellent
Point.Below with reference to figure, the utility model is described in further detail.
Brief description
The Figure of description constituting the part of the application is used for providing further understanding to of the present utility model, this practicality
New schematic description and description is used for explaining the utility model, does not constitute to improper restriction of the present utility model.
In the accompanying drawings：
Fig. 1 is that the principle of the anti-open circuit set of current transformer root terminal according to the utility model one embodiment is illustrated
Figure.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Mutually combine.To describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 1 is that the principle of the anti-open circuit set of current transformer root terminal according to the utility model one embodiment is illustrated
Figure.
As shown in figure 1, current transformer root anti-open terminal device includes：Root secondary terminal box 10, including multigroup
Terminal, the first end of every group of terminal is electrically connected with a pair of outlet 110 of current transformer, and the second end of every group of terminal is mutual with electric current
Sensor central console electrically connects；Time-delay relay 50, touches including a pair in each group of outlet being connected in parallel on current transformer is normally opened
Point；Voltage sample transformer 20, is electrically connected with access side of root secondary terminal box 10；And voltage comparison module
30, including the sampling input electrically connecting with voltage sample transformer 20 and the output end electrically connecting with time-delay relay 50, use
In the closure normally opened contact when current transformer is opened a way.
According to the anti-open terminal device of current transformer root of the present utility model, by root secondary terminal box so that
The easy-to-connect of time-delay relay and voltage sample device is reliable, when open circuit situation in one group of outlet of voltage transformer, one
Voltage between group outlet increases, and sample information is fed back to voltage comparison module by voltage sample transformer, higher than tactile
During the pressure that generates electricity, voltage comparison module controls the normally opened contact closure of time-delay relay, by a pair of access of root secondary terminal box
Terminal forces short circuit, technically realizes secondary side terminal anti-open circuit purpose.
In one embodiment, the anti-short-circuiting terminal device of above-mentioned voltage transformer root also includes connecting to described voltage ratio relatively
The alarm of the output end of module, alarm is connected in voltage comparison module, and this alarm is buzzer and/or LED light.
In the present embodiment, when s1, n1 short circuit, the voltage output of voltage comparison module makes buzzer and/or LED light report to the police,
To remind staff to be safeguarded.
In one embodiment, current transformer root secondary terminal box middle connecting terminal, first group to the 9th group upper end is
S1, n1, s2, n2 s9, n9, from current transformer outlet, first group to the 9th group lower end is a1, n1, a2, n2
A9, n9, are linked into current transformer central console.
First group of outlet of current transformer is connected on s1, n1, and voltage sample transformer 1 is attempted by s1, n1, and relay is normal
Open contact KM1 to be attempted by s1, n1, voltage sample transformer 1 sampled value is input in voltage comparison module, relay winding moves
It is linked in voltage comparison module as coil.Maximum 9 groups of current transformer outlets detections of support, and open-circuit working supervision occurs.
Taking the first group of outlet of first via current transformer as a example, when open circuit situation in first group of outlet, s1, n1 two ends
Very high voltage can be produced, voltage sample transformer 1 is experienced the rising of s1, n1 voltage, sample information is fed back to voltage ratio
Compared with module, voltage comparison module sends open circuit chimes of doom by alarm.Through time delay after a while, if no staff is processed
Open fault, the actuation coil KM1 conducting of relay, so that the normally opened contact closure of relay KM1, s1, n1 is forced short circuit.
In one embodiment, above-mentioned time-delay relay, voltage sample transformer and described voltage comparison module are arranged on institute
State in root secondary terminal box, so that wiring construction is succinctly orderly.
In one embodiment, above-mentioned voltage comparison module includes multiple voltage comparators, each voltage comparator control electric current
One group of outlet of transformer, when input terminal voltage is higher than trigger voltage, voltage comparison module exports high potential, controls time delay to continue
Electrical equipment action.In another embodiment, above-mentioned multiple voltage comparator is replaced by controller, accordingly, also includes and controller
The communication module connecting, sends open circuit warning message by communication module to upper strata.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.All of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvement made etc., should be included within protection domain of the present utility model.
Claims (6)
1. a kind of anti-open terminal device of current transformer root is it is characterised in that include：
Root secondary terminal box, including multigroup terminal, the first end of every group of terminal is electric with a pair of outlet of described current transformer
Connect, the second end of described every group of terminal is electrically connected with described current transformer central console；
Time-delay relay, including a pair of normally opened contact in each group of outlet being connected in parallel on current transformer；
Voltage sample transformer, is electrically connected with access side of described root secondary terminal box；And
Voltage comparison module, including the sampling input electrically connecting with described voltage sample transformer and with described time-delay relay
The output end of electrical connection, wherein, described output end is electrically connected with described time-delay relay, in described current transformer open circuit
When close described normally opened contact.
2. the anti-open terminal device of current transformer root according to claim 1 is it is characterised in that also include connecting extremely
The alarm of the output end of described voltage comparison module.
3. the anti-open terminal device of current transformer root according to claim 2 is it is characterised in that described alarm bag
Include buzzer and/or LED light.
4. the anti-open terminal device of current transformer root according to claim 1 is it is characterised in that described Current Mutual Inductance
Device includes 9 groups of outlets, and described root secondary terminal box includes 9 groups with upper terminal.
5. the anti-open terminal device of current transformer root according to claim 1 is it is characterised in that described time delay relay
Device, voltage sample transformer and described voltage comparison module are arranged in described root secondary terminal box.
6. the anti-open terminal device of current transformer root according to claim 1 it is characterised in that described voltage ratio relatively
Module is voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621014560.3U CN205945023U (en) | 2016-08-30 | 2016-08-30 | Terminal arrangement that opens a way is prevented to current transformer root |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621014560.3U CN205945023U (en) | 2016-08-30 | 2016-08-30 | Terminal arrangement that opens a way is prevented to current transformer root |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945023U true CN205945023U (en) | 2017-02-08 |
Family
ID=57954820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621014560.3U Active CN205945023U (en) | 2016-08-30 | 2016-08-30 | Terminal arrangement that opens a way is prevented to current transformer root |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205945023U (en) |
-
2016
- 2016-08-30 CN CN201621014560.3U patent/CN205945023U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 397, Tongcheng South Road, Baohe District, Hefei City, Anhui Province 230061 Patentee after: STATE GRID ANHUI POWER SUPPLY COMPANY OVERHAUL BRANCH Patentee after: STATE GRID CORPORATION OF CHINA Address before: No.415 Wuhu Road, Baohe District, Hefei City, Anhui Province 230061 Patentee before: Maintenance Company Of State Grid Anhui Electric Power Company Patentee before: State Grid Corporation of China |
|
| CP03 | Change of name, title or address | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 397, Tongcheng South Road, Baohe District, Hefei City, Anhui Province 230061 Patentee after: Super high voltage branch of State Grid Anhui Electric Power Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Address before: No. 397, Tongcheng South Road, Baohe District, Hefei City, Anhui Province 230061 Patentee before: STATE GRID ANHUI POWER SUPPLY COMPANY OVERHAUL BRANCH Patentee before: STATE GRID CORPORATION OF CHINA |
|
| CP01 | Change in the name or title of a patent holder |