CN208479173U - A kind of transformer neutral point earth protection device - Google Patents
A kind of transformer neutral point earth protection device Download PDFInfo
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- CN208479173U CN208479173U CN201821166607.7U CN201821166607U CN208479173U CN 208479173 U CN208479173 U CN 208479173U CN 201821166607 U CN201821166607 U CN 201821166607U CN 208479173 U CN208479173 U CN 208479173U
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Abstract
The utility model discloses a kind of transformer neutral point earth protection devices, including transformer body, the transformer body is equipped with ground protection module, the ground protection module includes capacitor C1, positive one end of the capacitor C1 is connected with the anode of input terminal U0, one end of resistance R2, one end of resistance R3, the collector of triode V1 and the collector of triode V2, cathode one end of the capacitor C1 is connected with one end of resistance R1, the other end of the resistance R2 is connected with the anode of diode D1, the other end of the resistance R3 is connected with the cathode of diode D2, the emitter of the triode V1 is connected with the base stage of triode V2.The utility model structure is simple, easy for installation, economical and practical, by diode D1 and triode V2, output voltage can be made to continuously adjust between 6~15V, prevents transformer equipment insulation damages from threatening when leaking electricity to the security of the lives and property of people.
Description
Technical field
The utility model relates to ground protection technical field more particularly to a kind of transformer neutral point earth protection devices.
Background technique
Transformer is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary coil, secondary
Grade coil and iron core.Major function has: voltage transformation, current transformation, impedance transformation, isolation, pressure stabilizing etc..It can divide by purposes
Are as follows: power transformer and special transformer electric furnace become, rectify change, power frequency testing transformer, pressure regulator, mining change, audio transformation
Device, intermediate-frequency transformer, high frequency transformer, impact transformer, instrument transformer, electronic transformer, reactor, mutual inductor etc., mesh
Preceding transformer neutral point output voltage in ground connection is larger, when the electric leakage of transformer equipment insulation damages, can cause to human body
Electric shock risk, therefore we have proposed a kind of transformer neutral point earth protection devices for solving the above problems.
Utility model content
Purpose of the utility model is to solve disadvantages existing in the prior art, and a kind of transformer proposed is neutral
Point earth protective device.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of transformer neutral point earth protection device, including transformer body, the transformer body are equipped with ground connection
Protective module, the ground protection module include capacitor C1, positive one end of the capacitor C1 be connected with the anode of input terminal U0,
One end of resistance R2, one end of resistance R3, the collector of triode V1 and triode V2 collector, the capacitor C1's is negative
Pole one end is connected with one end of resistance R1, and the other end of the resistance R2 is connected with the anode of diode D1, the resistance R3's
The other end is connected with the cathode of diode D2, and the emitter of the triode V1 is connected with the base stage of triode V2, three pole
The emitter of pipe V2 is connected with one end of resistance R5 and the anode of output end U1, and the base stage of the triode V1 is connected with resistance R5
The other end, one end of resistance R6 and positive one end of capacitor C3, the other end of the resistance R1 is connected with the negative of input terminal U0
Pole, the cathode of diode D1, the anode of diode D2, one end of resistance R4, cathode one end of capacitor C2, resistance R6 the other end
With one end of resistance R7, positive one end of the capacitor C2 is connected with the other end of resistance R4, and the other end of the resistance R7 connects
It is connected to cathode one end of capacitor C3 and the cathode of output end U1.
Preferably, the input voltage of the anode of the input terminal U0 is AC 220 V.
Preferably, the resistance value of the resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and resistance R7 according to
Secondary is 1k Ω, 1k Ω, 800 Ω, 600 Ω, 400 Ω, 400 Ω and 200 Ω.
Preferably, the model of the diode D1 and diode D2 is D71N4003.
Preferably, the model of the triode V1 and triode V2 is 1N5551.
Preferably, the capacitance of the capacitor C1, capacitor C2 and capacitor C3 are 220 μ F.
Compared with prior art, the utility model has the beneficial effects that
Pass through transformer body, ground protection module, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance
R6, resistance R7, diode D1, diode D2, triode V1, triode V2, triode V3, capacitor C1, capacitor C2 and capacitor C3
It matches, triode V1 and triode V2 constitute thyristor, make overload protection element using thyristor, can be with using voltage drop
Thyristor is triggered, the base stage when its conducting as the Darlington multiple tube of serial transistor has actually been grounded, therefore it is brilliant to connect
Body pipe cut-off, cutting output electric current, can be such that output voltage continuously adjusts between 6~15V, prevent transformer equipment insulation damages from leaking
It threatens when electric to the security of the lives and property of people.
The utility model structure is simple, easy for installation, economical and practical, by diode D1 and triode V2, can make to export
Voltage continuously adjusts between 6~15V, prevents transformer equipment insulation damages from causing prestige to the security of the lives and property of people when leaking electricity
The side of body.
Detailed description of the invention
Fig. 1 be the utility model proposes a kind of transformer neutral point earth protection device structural schematic diagram；
Fig. 2 be the utility model proposes a kind of transformer neutral point earth protection device circuit diagram.
In figure: 1 transformer body, 2 ground protection modules.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.
Referring to Fig.1-2, a kind of transformer neutral point earth protection device, including transformer body 1, on transformer body 1
Equipped with ground protection module 2, ground protection module 2 includes capacitor C1, and positive one end of capacitor C1 is being connected with input terminal U0 just
Pole, one end of resistance R2, one end of resistance R3, the collector of triode V1 and triode V2 collector, the cathode of capacitor C1
One end is connected with one end of resistance R1, and the other end of resistance R2 is connected with the anode of diode D1, the other end connection of resistance R3
There is the cathode of diode D2, the emitter of triode V1 is connected with the base stage of triode V2, and the emitter of triode V2 is connected with
One end of resistance R5 and the anode of output end U1, the base stage of triode V1 are connected with one end of the other end of resistance R5, resistance R6
With positive one end of capacitor C3, the other end of resistance R1 is connected with the cathode of input terminal U0, the cathode of diode D1, diode D2
Anode, one end of resistance R4, cathode one end of capacitor C2, the other end of resistance R6 and one end of resistance R7, capacitor C2 is just
Pole one end is connected with the other end of resistance R4, and the other end of resistance R7 is connected with cathode one end of capacitor C3 and bearing for output end U1
Pole passes through transformer body 1, ground protection module 2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electricity
R7, diode D1, diode D2, triode V1, triode V2, triode V3, capacitor C1, capacitor C2 and capacitor C3 is hindered to match
It closes, triode V1 and triode V2 are constituted thyristor, make overload protection element using thyristor, can be triggered using voltage drop
Thyristor, the base stage when its conducting as the Darlington multiple tube of serial transistor has actually been grounded, therefore serial transistor
Cut-off, cutting output electric current, can be such that output voltage continuously adjusts between 6~15V, when preventing transformer equipment insulation damages from leaking electricity
It threatening to the security of the lives and property of people, the utility model structure is simple, and it is easy for installation, it is economical and practical, pass through diode D1
With triode V2, output voltage can be made to continuously adjust between 6~15V, prevent transformer equipment insulation damages when leaking electricity to people's
The security of the lives and property threatens.
In the utility model, the input voltage of the anode of input terminal U0 is AC 220 V, resistance R1, resistance R2, resistance
R3, resistance R4, resistance R5, resistance R6 and resistance R7 resistance value be followed successively by 1k Ω, 1k Ω, 800 Ω, 600 Ω, 400 Ω, 400 Ω
Model with 200 Ω, diode D1 and diode D2 is that the model of D71N4003, triode V1 and triode V2 are
1N5551, the capacitance of capacitor C1, capacitor C2 and capacitor C3 are 220 μ F, pass through transformer body 1, ground protection module 2, electricity
Hinder R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, diode D1, diode D2, triode V1, three
Pole pipe V2, triode V3, capacitor C1, capacitor C2 and capacitor C3 are matched, and triode V1 and triode V2 constitute thyristor, are adopted
Make overload protection element with thyristor, thyristor can be triggered using voltage drop, the reaching as serial transistor when its conducting
The base stage of Islington multiple tube has actually been grounded, therefore serial transistor ends, cutting output electric current, can make output voltage 6~
It is continuously adjusted between 15V, prevents transformer equipment insulation damages from threatening when leaking electricity to the security of the lives and property of people, this is practical new
Type structure is simple, easy for installation, economical and practical, by diode D1 and triode V2, output voltage can be made to connect between 6~15V
It is continuous to adjust, prevent transformer equipment insulation damages from threatening when leaking electricity to the security of the lives and property of people.
Working principle: in use, triode V1 and triode V2 constitute thyristor, overload protection member is made using thyristor
Part can trigger thyristor using voltage drop, and the base stage when its conducting as the Darlington multiple tube of serial transistor is practical
On be grounded, therefore serial transistor end, cutting output electric current, output voltage can be made to continuously adjust between 6~15V, prevent from becoming
Depressor apparatus insulated damage threatens to the security of the lives and property of people when leaking electricity.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (6)
1. a kind of transformer neutral point earth protection device, including transformer body (1), which is characterized in that the transformer sheet
Body (1) is equipped with ground protection module (2), and the ground protection module (2) includes capacitor C1, positive one end of the capacitor C1
It is connected with the collection of the anode of input terminal U0, one end of resistance R2, one end of resistance R3, the collector of triode V1 and triode V2
Electrode, cathode one end of the capacitor C1 are connected with one end of resistance R1, and the other end of the resistance R2 is connected with diode D1
Anode, the other end of the resistance R3 is connected with the cathode of diode D2, and the emitter of the triode V1 is connected with three poles
The base stage of pipe V2, the emitter of the triode V2 are connected with one end of resistance R5 and the anode of output end U1, the triode
The base stage of V1 is connected with positive one end of the other end of resistance R5, one end of resistance R6 and capacitor C3, and the resistance R1's is another
End be connected with the cathode of input terminal U0, the cathode of diode D1, the anode of diode D2, one end of resistance R4, capacitor C2 it is negative
Pole one end, the other end of resistance R6 and resistance R7 one end, positive one end of the capacitor C2 is connected with the other end of resistance R4,
The other end of the resistance R7 is connected with cathode one end of capacitor C3 and the cathode of output end U1.
2. a kind of transformer neutral point earth protection device according to claim 1, which is characterized in that the input terminal U0
Anode input voltage be AC 220 V.
3. a kind of transformer neutral point earth protection device according to claim 1, which is characterized in that the resistance R1,
Resistance R2, resistance R3, resistance R4, resistance R5, resistance R6 and resistance R7 resistance value be followed successively by 1k Ω, 1k Ω, 800 Ω, 600 Ω,
400 Ω, 400 Ω and 200 Ω.
4. a kind of transformer neutral point earth protection device according to claim 1, which is characterized in that the diode D1
Model with diode D2 is D71N4003.
5. a kind of transformer neutral point earth protection device according to claim 1, which is characterized in that the triode V1
Model with triode V2 is 1N5551.
6. a kind of transformer neutral point earth protection device according to claim 1, which is characterized in that the capacitor C1,
The capacitance of capacitor C2 and capacitor C3 are 220 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821166607.7U CN208479173U (en) | 2018-07-23 | 2018-07-23 | A kind of transformer neutral point earth protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821166607.7U CN208479173U (en) | 2018-07-23 | 2018-07-23 | A kind of transformer neutral point earth protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208479173U true CN208479173U (en) | 2019-02-05 |
Family
ID=65208738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821166607.7U Active CN208479173U (en) | 2018-07-23 | 2018-07-23 | A kind of transformer neutral point earth protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208479173U (en) |
-
2018
- 2018-07-23 CN CN201821166607.7U patent/CN208479173U/en active Active
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