CN205943695U - Short -circuited terminal device is prevented to voltage transformer root - Google Patents
Short -circuited terminal device is prevented to voltage transformer root Download PDFInfo
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- CN205943695U CN205943695U CN201621014573.0U CN201621014573U CN205943695U CN 205943695 U CN205943695 U CN 205943695U CN 201621014573 U CN201621014573 U CN 201621014573U CN 205943695 U CN205943695 U CN 205943695U
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- 238000004891 communication Methods 0.000 description 2
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a short -circuited terminal device is prevented to voltage transformer root, include: root secondary terminal box, including the multiunit terminal, the first end of every group terminal is connected with a pair of electricity of being qualified for the next round of competitions of voltage transformer, and the second end and the voltage transformer collection accuse case electricity of every group terminal are connected, delay relay is including establishing ties a pair of normally closed contact on voltage transformer each group 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 time delay delay relay electricity for disconnection normally closed contact when the voltage transformer short circuit. The utility model discloses the whether short circuit of being qualified for the next round of competitions of every group of directly utilizing voltage sample mutual -inductor detection voltage mutual -inductor, voltage comparing module triggers delay relay's normally closed contact disconnection, opens a way root secondary terminal box's a pair of accesss terminal pressure, and the short circuit purpose is prevented in the realization.
Description
Technical field
The utility model is related to a kind of voltage transformer root terminal short-circuit preventing device.
Background technology
Voltage transformer (Potential transformer abbreviation PT, Voltage transformer also abbreviation VT) and
Transformer is very alike, is all used to the voltage on conversion line.But the purpose of transformer voltage of transformation is to convey electric energy,
Therefore capacity is very big, typically all with kilovolt-ampere or megavolt-ampere as unit of account；And the purpose of voltage transformer voltage of transformation, main
If being used for powering to measuring instrumentss and protective relaying device, for the voltage of measurement circuitry, power and electric energy, or it is used for
The capacity very little of the expensive equipment in protection circuit during line failure, motor and transformer, therefore voltage transformer, typically
All only have several volt-amperes, tens volt-amperes, maximum is also less than one kilovolt-ampere.
Voltage transformer is the minimum voltage source of an internal resistance, and during normal operation, load impedance is very big, is equivalent to open circuit shape
State, secondary side only has the load current of very little, and when secondary circuit short-circuit, load impedance is zero, will produce very big short circuit current,
Voltage transformer can will be led to burn out.
Require according to current operation, voltage transformer secondary side forbids short circuit, but this is only pre- anti-electric from management
Pressure transformer secondary circuit short-circuit, can not prevent from technology it is necessary to provide one kind to prevent voltage transformer secondary side from preventing at all
Short-circuit measure.
Utility model content
The purpose of this utility model is to provide a kind of voltage transformer root terminal short-circuit preventing device.
For this reason, the utility model provides a kind of anti-short-circuiting terminal device of voltage 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 described a pair of outlet of voltage transformer, described every group of terminal
The second end electrically connect with described voltage transformer central console；Time-delay relay, goes out including being connected on each group of voltage transformer
A pair of normally-closed contact on line；Voltage sample transformer, is electrically connected with access side of described root secondary terminal box；With
And voltage comparison module, including the sampling input electrically connecting with described voltage sample transformer and with described time delay time delay relay
The output end of device electrical connection, for disconnecting described normally-closed contact in the short circuit of described voltage transformer.
Further, the anti-short-circuiting terminal device of above-mentioned voltage 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 voltage transformer includes five groups of outlets, and described root secondary terminal box includes five groups of terminals.
Further, above-mentioned time-delay relay, voltage sample transformer and described voltage comparison module are arranged on described
In portion's secondary terminal box.
According to the anti-short-circuiting terminal device of voltage 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 short-circuit conditions in one group of outlet of voltage transformer, one
Voltage between group outlet decreases, and sample information is fed back to voltage comparison module, Time delay by voltage sample transformer
The normally-closed contact of relay disconnects, and access side of root secondary terminal box is forced open circuit, realizes anti-short 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 voltage transformer root terminal short-circuit preventing device according to the utility model one embodiment is illustrated
Figure；And
Fig. 2 is the principle schematic of the voltage transformer root terminal short-circuit preventing device of a comparative example.
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 and Fig. 2 is the principle of the voltage transformer root terminal short-circuit preventing device according to the utility model one embodiment
Schematic diagram.
In conjunction with seeing figures.1.and.2, voltage transformer root anti-short-circuiting terminal device includes：Root secondary terminal box 10, bag
Include multigroup terminal, a pair of the outlet of the first end of every group of terminal and described voltage transformer 100 electrically connects, the of described every group of terminal
Two ends are electrically connected with described voltage transformer central console 200；Time-delay relay 50, including being connected on, voltage transformer 100 is each
Normally-closed contact in group outlet 110；Voltage sample transformer 20, access side with described root secondary terminal box 110
Electrical connection；And voltage comparison module 30, including the sampling input electrically connecting with described voltage sample transformer 20 and with institute
State the output end of time-delay relay 50 electrical connection, for disconnecting described normally-closed contact in the short circuit of described voltage transformer.
According to the anti-short-circuiting terminal device of voltage 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 short-circuit conditions in one group of outlet of voltage transformer, one
Voltage between group outlet decreases, and sample information is fed back to voltage comparison module by voltage sample transformer, less than tactile
During the pressure that generates electricity, voltage comparison module controls the normally-closed contact of time-delay relay to disconnect, by a pair of access of root secondary terminal box
Terminal forces open circuit, technically realizes secondary side terminal anti-short circuit purpose.
In one embodiment, voltage transformer includes five groups of outlets, and described root secondary terminal box includes five groups of terminals
Son, as shown in figure 1, first group to the 5th group upper end is, s1, n1, s2, n2 s5, n5, from current transformer outlet, the
One group to the 5th group lower end is a1, n1, and a2, n2 a5, n5 are linked into voltage transformer central console.
First group of outlet of voltage transformer is connected on s1, n1, and voltage sample transformer 1 is attempted by s1, n1, and relay is normal
Closed contact KM1 is serially connected on s1, n1, and voltage sample transformer 1 sampled value is input in voltage comparison module, and relay winding moves
In the output end that coil is linked into voltage comparison module, alarm is connected in voltage comparison module, in the present embodiment, maximum
Support 5 groups of voltage transformer outlet detections, and short circuiting work occur to monitor.
Taking first group of outlet of voltage transformer as a example, when short-circuit conditions in first group of outlet, s1, n1 two ends can voltage
Can reduce, the reduction of s1, n1 voltage experienced by voltage sample transformer 1, sample information is fed back to voltage comparison module, voltage
Comparison module sends short-circuit alarming sound by alarm, sends short-circuit alarming information by communication module to upper strata.Through one section
Time delayses, if no staff processes open fault, the coil KM1 action of relay is so that relay KM1 contact disconnects
(KM1 is normally-closed contact), s1, n1 are forced open circuit.Other four groups of outlets are configured with same form.
Preferably, voltage comparison module includes multiple voltage comparators, and the input of voltage comparator is corresponding to connect one
Voltage sample transformer, the output end of voltage comparator is corresponding to connect time-delay relay winding actuation coil.As multiple voltages
The replacement of comparator, voltage sample transformer is electrically connected to controller, carries out voltage ratio relatively by controller, and then controls alarm
Report to the police and the time delay of control relay KM1 contact disconnects, now the delay function of time-delay relay KM1 can be come in fact by controller
Existing.Further, also include the communication module being connected with controller, to send warning message to upper strata.
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.This alarm is buzzer and/or LED light.In the present embodiment, when s1, n1 short circuit
When, 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, 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.
Fig. 2 is the principle schematic of the voltage transformer root terminal short-circuit preventing device of a comparative example.
As shown in Fig. 2 the root secondary side of voltage transformer 100 is provided with root secondary side terminal box 19, root is secondary to be connect
Line box 10 includes five groups of binding posts, as shown in figure 1, first group to the 5th group upper end is, s1, n1, and s2, n2 s5, n5,
From current transformer 100 outlet, first group to the 5th group lower end is a1, n1, and a2, n2 a5, n5 are linked into mutual induction of voltage
Device central console 200.It is provided with magnetictrip 60 between first group of upper end S1, n1 and lower end a1, n1, open normally closed touching in excessively stream
Point.
In this embodiment, when the binding post excessively stream that s1 and n1 is located, magnetictrip 60 action, off voltage is mutual
One group of outlet of sensor, compared with comparative example, the embodiment shown in Fig. 1 using voltage sample transformer directly gather S1 and
Whether the voltage between n1, more directly characterize short-circuit between S1 and n1, and between corresponding s1 and n1 when KM1 disconnects
Voltage can set, and can set time delay disconnection.
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 (5)
1. a kind of anti-short-circuiting terminal device of voltage 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 electrically connected with described a pair of outlet of voltage transformer
Connect, the second end of described every group of terminal is electrically connected with described voltage transformer central console；
Time-delay relay, including a pair of normally-closed contact being connected in each group of outlet of voltage 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, for disconnecting described normally-closed contact in the short circuit of described voltage transformer.
2. the anti-short-circuiting terminal device of voltage 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-short-circuiting terminal device of voltage transformer root according to claim 2 is it is characterised in that described alarm bag
Include buzzer and/or LED light.
4. the anti-short-circuiting terminal device of voltage transformer root according to claim 1 is it is characterised in that described mutual induction of voltage
Device includes five groups of outlets, and described root secondary terminal box includes five groups of terminals.
5. the anti-short-circuiting terminal device of voltage 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621014573.0U CN205943695U (en) | 2016-08-30 | 2016-08-30 | Short -circuited terminal device is prevented to voltage transformer root |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621014573.0U CN205943695U (en) | 2016-08-30 | 2016-08-30 | Short -circuited terminal device is prevented to voltage transformer root |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205943695U true CN205943695U (en) | 2017-02-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621014573.0U Active CN205943695U (en) | 2016-08-30 | 2016-08-30 | Short -circuited terminal device is prevented to voltage transformer root |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205943695U (en) |
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2016
- 2016-08-30 CN CN201621014573.0U patent/CN205943695U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| 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 |
|
| CP01 | Change in the name or title of a patent holder | ||
| 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 |