CN209462004U - A kind of secondary loop of mutual inductor broken string automatic safety device - Google Patents
A kind of secondary loop of mutual inductor broken string automatic safety device Download PDFInfo
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- CN209462004U CN209462004U CN201920316884.XU CN201920316884U CN209462004U CN 209462004 U CN209462004 U CN 209462004U CN 201920316884 U CN201920316884 U CN 201920316884U CN 209462004 U CN209462004 U CN 209462004U
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- disconnecting link
- kdz
- coil
- quick disconnecting
- dyj
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Abstract
The utility model relates to a kind of secondary loop of mutual inductor broken string automatic safety devices, including quick disconnecting link KDZ, voltage-type relay DYJ；The both ends end to end of the quick disconnecting link KDZ and the both ends end to end of the voltage-type relay DYJ coil are separately connected, two tie point is connected in the secondary side winding of protected current transformer as leading-out terminal.In the case that the utility model can break in secondary loop of mutual inductor, secondary side induces high pressure, rapidly by the secondary circuit short-circuit of current transformer, the high pressure that Current Transformer Secondary side induces is eliminated, secondary circuit insulation breakdown is avoided.
Description
Technical field
The utility model relates to the automatic protection field of current transformer, especially a kind of secondary loop of mutual inductor is disconnected
Line automatic safety device.
Background technique
Current transformer is widely used in electric system current measurement, and when operating normally, secondary side does not allow to open a way.
When current transformer operates normally, and secondary side is opened a way, high pressure can be induced in secondary side.The high pressure induced will lead to secondary
Circuit insulation breakdown even results in secondary circuit catching fire, causes power grid accident expansion and economic loss.Meanwhile it inducing
If high pressure eliminate not in time, also can cause great threat to operations staff and service personnel, even result in personal injury.
Summary of the invention
In view of this, the purpose of the utility model is to provide a kind of secondary loop of mutual inductor broken string automatic protection dresses
It sets, it can be in the case where secondary loop of mutual inductor broken string, secondary side induce high pressure, rapidly by the two of current transformer
Secondary side short circuit, eliminates the high pressure that Current Transformer Secondary side induces, avoids secondary circuit insulation breakdown.
The utility model is realized using following scheme: a kind of secondary loop of mutual inductor broken string automatic safety device, packet
Include quick disconnecting link KDZ, voltage-type relay DYJ；The both ends end to end of the quick disconnecting link KDZ and the voltage-type relay DYJ
The both ends end to end of coil are separately connected, two tie point is connected to the secondary of protected current transformer as leading-out terminal
On the winding of side.
It further, further include external DC control supply KM, breaker DL position contact and combined floodgate guard relay
HBJ；Wherein the separating brake of quick disconnecting link KDZ and combined floodgate are controlled by a control loop, the control loop specifically: voltage-type relay
The normal opened contact DYJ1 of device coil DYJ, the position breaker DL normal opened contact DL1, the coil of combined floodgate guard relay HBJ and fast
The closing coil KDZH concatenation of fast disconnecting link KDZ is followed by normally opened the connecing of combined floodgate guard relay HBJ on external DC control supply
The normal opened contact DYJ1 of point HBJ1 and voltage-type relay coil DYJ simultaneously connects；The position normally closed contact DL2 of breaker DL, quickly
External direct current control is equally connected to after the opening coil KDZF concatenation of the position normal opened contact KDZ1 and quick disconnecting link KDZ of disconnecting link KDZ
On power supply processed.
Preferably, the Automatic Control Theory of the secondary loop of mutual inductor broken string automatic safety device are as follows:
A) when interval operates normally, breaker DL is in "on" position and secondary loop of mutual inductor does not break
When, voltage-type relay coil (DYJ) is in power failure state, and normal opened contact (DYJ1) is in the open state, and DL1 is in closure
State, combined floodgate guard relay (HBJ) and quick disconnecting link closing coil (KDZH) can not obtain electric at this time, at quick disconnecting link (KDZ)
In gate-dividing state；
B) when interval operates normally, breaker DL is in "on" position and when secondary loop of mutual inductor breaks,
Current Transformer Secondary side induces high pressure and voltage-type relay coil (DYJ) is made to be in obtain electricity condition, normal opened contact
(DYJ1) it is closed, and DL1 is in closed state, then close a floodgate guard relay (HBJ) and quick disconnecting link closing coil (KDZH)
Electricity, by the short circuit of Current Transformer Secondary side, eliminates the high pressure that secondary side induces so that quickly disconnecting link closes a floodgate rapidly.Meanwhile it closing
Lock guard relay (HBJ) it is electric after, normal opened contact (HBJ1) closure, as long as breaker is non-shut-brake, quick disconnecting link closes a floodgate
Coil (KDZH) is constantly in obtain electricity condition, it is ensured that quick disconnecting link is constantly in "on" position；
C) when interval operates normally, breaker DL is in "on" position and secondary loop of mutual inductor occurs after breaking,
Quick disconnecting link (KDZ) closes a floodgate, then breaker normally closed contact (DL2) is in the open state, at quick disconnecting link normal opened contact (KDZ1)
In closed state, after breaker open operation, breaker normally closed contact (DL2) closure, so that quickly disconnecting link opening coil (KDZF)
Must be electric, by quick disconnecting link separating brake, to disconnect protective loop.After quick disconnecting link separating brake, normal opened contact (KDZ1) is opened, and is cut
Disconnected sub-gate circuit.
Compared with prior art, the utility model has the following beneficial effects: the Current Transformer Secondary of the utility model
It is fast in the case that circuit breaking automatic safety device can break in secondary loop of mutual inductor, secondary side induces high pressure
The secondary circuit short-circuit of current transformer is eliminated the high pressure that Current Transformer Secondary side induces, secondary circuit is avoided to insulate by speed
Breakdown even results in secondary circuit catching fire, causes power grid accident expansion and economic loss.Meanwhile secondary side is eliminated rapidly
The high pressure of induction also helps the personal safety for ensureing operation maintenance personnel and service personnel.
Detailed description of the invention
Fig. 1 is the primary connection figure of the utility model embodiment.
Fig. 2 is the automatic safety device wiring diagram of the utility model embodiment.
Fig. 3 is the quick disconnecting link control loop wiring diagram of the utility model.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the wiring diagram of the primary equipments such as current transformer, breaker is as shown in Figure 1.As shown in Fig. 2, this reality
Apply a kind of secondary loop of mutual inductor broken string automatic safety device of example, including quick disconnecting link KDZ, voltage-type relay DYJ；
The both ends end to end of the quick disconnecting link KDZ and the both ends end to end of the voltage-type relay DYJ coil are separately connected, two company
Contact is connected in the secondary side winding of protected current transformer as leading-out terminal.
In the present embodiment, further include external DC control supply KM, breaker DL position contact and close a floodgate keep after
Electric appliance HBJ；Wherein the separating brake of quick disconnecting link KDZ and combined floodgate are controlled by a control loop, as shown in figure 3, the control loop has
Body are as follows: normal opened contact DYJ1, the position the breaker DL normal opened contact DL1, combined floodgate guard relay of voltage-type relay coil DYJ
The closing coil KDZH of the coil of HBJ and quick disconnecting link KDZ concatenation are followed by external DC control supply, close a floodgate keep after
The normal opened contact DYJ1 of the normal opened contact HBJ1 of electric appliance HBJ and voltage-type relay coil DYJ simultaneously connects；The position of breaker DL is normal
It closes after the opening coil KDZF concatenation of contact DL2, the position normal opened contact KDZ1 of quick disconnecting link KDZ and quick disconnecting link KDZ equally
It is connected on external DC control supply.
Preferably, the Automatic Control Theory of the secondary loop of mutual inductor broken string automatic safety device are as follows:
A) when interval operates normally, breaker DL is in "on" position and secondary loop of mutual inductor does not break
When, voltage-type relay coil (DYJ) is in power failure state, and normal opened contact (DYJ1) is in the open state, and DL1 is in closure
State, combined floodgate guard relay (HBJ) and quick disconnecting link closing coil (KDZH) can not obtain electric at this time, at quick disconnecting link (KDZ)
In gate-dividing state；
B) when interval operates normally, breaker DL is in "on" position and when secondary loop of mutual inductor breaks,
Current Transformer Secondary side induces high pressure and voltage-type relay coil (DYJ) is made to be in obtain electricity condition, normal opened contact
(DYJ1) it is closed, and DL1 is in closed state, then close a floodgate guard relay (HBJ) and quick disconnecting link closing coil (KDZH)
Electricity, by the short circuit of Current Transformer Secondary side, eliminates the high pressure that secondary side induces so that quickly disconnecting link closes a floodgate rapidly.Meanwhile it closing
Lock guard relay (HBJ) it is electric after, normal opened contact (HBJ1) closure, as long as breaker is non-shut-brake, quick disconnecting link closes a floodgate
Coil (KDZH) is constantly in obtain electricity condition, it is ensured that quick disconnecting link is constantly in "on" position；
C) when interval operates normally, breaker DL is in "on" position and secondary loop of mutual inductor occurs after breaking,
Quick disconnecting link (KDZ) closes a floodgate, then breaker normally closed contact (DL2) is in the open state, at quick disconnecting link normal opened contact (KDZ1)
In closed state, after breaker open operation, breaker normally closed contact (DL2) closure, so that quickly disconnecting link opening coil (KDZF)
Must be electric, by quick disconnecting link separating brake, to disconnect protective loop.After quick disconnecting link separating brake, normal opened contact (KDZ1) is opened, and is cut
Disconnected sub-gate circuit.
It is noted that the utility model protection is hardware configuration, it is not claimed as control method.Above only
For a preferable embodiment in the utility model embodiment.But the utility model is not limited to the embodiment above, it is all
Any equivalent change and modification done by the utility model, range of the generated function without departing from this programme
When, belong to the protection scope of the utility model.
Claims (2)
- The automatic safety device 1. a kind of secondary loop of mutual inductor breaks, it is characterised in that: including quick disconnecting link KDZ, voltage Type relay DYJ；The both ends end to end of the quick disconnecting link KDZ and the both ends end to end of the voltage-type relay DYJ coil are distinguished Connection, two tie point are connected in the secondary side winding of protected current transformer as leading-out terminal.
- The automatic safety device 2. a kind of secondary loop of mutual inductor according to claim 1 breaks, it is characterised in that: also Including external DC control supply KM, breaker DL position contact and combined floodgate guard relay HBJ；Wherein quick disconnecting link KDZ Separating brake and close a floodgate by a control loop control, the control loop specifically: the normal opened contact of voltage-type relay coil DYJ The closing coil of DYJ1, the position breaker DL normal opened contact DL1, the coil of combined floodgate guard relay HBJ and quick disconnecting link KDZ KDZH concatenation is followed by external DC control supply, the normal opened contact HBJ1 and voltage-type relay of combined floodgate guard relay HBJ The normal opened contact DYJ1 of device coil DYJ simultaneously connects；The position normally closed contact DL2 of breaker DL, quick disconnecting link KDZ position normally opened connect It is equally connected on external DC control supply after the opening coil KDZF of point KDZ1 and quick disconnecting link KDZ concatenation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920316884.XU CN209462004U (en) | 2019-03-13 | 2019-03-13 | A kind of secondary loop of mutual inductor broken string automatic safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920316884.XU CN209462004U (en) | 2019-03-13 | 2019-03-13 | A kind of secondary loop of mutual inductor broken string automatic safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209462004U true CN209462004U (en) | 2019-10-01 |
Family
ID=68047272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920316884.XU Active CN209462004U (en) | 2019-03-13 | 2019-03-13 | A kind of secondary loop of mutual inductor broken string automatic safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209462004U (en) |
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2019
- 2019-03-13 CN CN201920316884.XU patent/CN209462004U/en active Active
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