CN209250217U - Voltage of power overload protection arrangement - Google Patents
Voltage of power overload protection arrangement Download PDFInfo
- Publication number
- CN209250217U CN209250217U CN201920238606.7U CN201920238606U CN209250217U CN 209250217 U CN209250217 U CN 209250217U CN 201920238606 U CN201920238606 U CN 201920238606U CN 209250217 U CN209250217 U CN 209250217U
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- Prior art keywords
- voltage
- overload protection
- protection arrangement
- thyristor
- power overload
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Abstract
The utility model discloses a kind of voltage of power overload protection arrangement, it includes current transformer, zener diode, rectification circuit, thyristor, reed relay and buckle releaser, wherein zener diode is connected across the two sides of the power supply of current transformer upper and lower ends, its pressure stabilizing value is exactly overvoltage protection action value, when electric network fault or network voltage it is unstable cause voltage increase be more than setting value when, zener diode conducting, there is residual current in current transformer primary side, secondary side generates low current, after rectified circuit and thyristor processing amplification, control reed relay and buckle releaser movement, cut off electric network source, it plays a protective role, the voltage of power overload protection arrangement detection for embodying the utility model is fine, incude sensitive, and actuation time is fast.
Description
Technical field
The embodiments of the present invention are related to electrical protection apparatus, in particular to a kind of voltage of power overload protection
Device.
Background technique
When current or voltage added on electrical equipment is more than limit value, produced excessive heat causes damage to it
Evil is called overload, and overload protection is that the overload protection for preventing main power line from installing additional because protector is caused to cross cause thermal damage for overload is set
It is standby.
Mass society electricity consumption is there are three peak, the respectively morning, afternoon and evening, and also there are three peaks for local-style dwelling houses cell, divides
Not Wei morning, noon and evening, other periods are usually the valley power consumption period, can be increased in low-valley interval line voltage, especially
It is the time-division at midnight, city's voltage can rise to 240V or more.According to statistics, it is during the charging process, and to have that 80% electric vehicle is on fire
Electric vehicle fire more than half is occurred during night charging, and electric vehicle charges reason on fire in addition to route is old
Change, battery short circuit and charger mismatch are outer, and there are one the charging voltage overloads that important reason is storage battery.
There are two types of existing voltage overload protective device is general, one is be directed to transient high voltage, such as thunder and lightning moment height
The voltage overload protective device degree of detection of the lightning protection device etc. of voltage, this type is not fine, the electricity consumption not being suitable in the case of alternating current
Scene；Another kind is the detection based on wire and cable surface temperature, such as temperature sensing cable formula, thermistor-type, Optic Fibre Temperature Sensor
And infrared thermal imagery formula etc., the voltage overload protective device actuation time of this type are too long.
Utility model content
The purpose of this utility model is that in view of the above-mentioned drawbacks in the prior art, it is fine to provide a kind of detection, when movement
Between fast voltage of power overload protection arrangement.
To realize above-mentioned purpose of utility model, the utility model adopts the technical scheme that a kind of voltage of power overload
Protective device, including current transformer, zener diode, rectification circuit, thyristor, reed relay and buckle releaser, wherein electricity
Current transformer is coupled in alternating current source；Zener diode is connected across the two sides of the power supply of current transformer upper and lower ends；Rectification
The input terminal of circuit and the secondary side of current transformer intercouple；Thyristor, reed relay are serially connected, and are coupled in whole
Flow the output end of device circuit；Buckle releaser is serially connected in alternating current source, and couples with reed relay.
In addition, the utility model also provides following attached technical scheme:
Voltage of power overload protection arrangement further includes filter circuit, which is coupled in the secondary side of current transformer
Between rectification circuit.
Filter circuit is made of resistance R1 and capacitor C1 parallel with one another.
Voltage of power overload protection arrangement further includes varistor, and the varistor and thyristor are parallel with one another.
Voltage overload protective device further includes resistance R2, capacitor C2 and diode D2, resistance R2, capacitor C2 and diode
D2 is serially connected, and is connected across between the anode of thyristor and control electrode.
Voltage of power overload protection arrangement further includes buzzer, and the buzzer and reed relay are parallel with one another.
The pressure stabilizing value of zener diode is 240V.
Rectification circuit is bridge rectifier.
Compared with the prior art, the advantage of the voltage of power overload protection arrangement of the utility model is: it includes electric current
Mutual inductor, zener diode, rectification circuit, thyristor, reed relay and buckle releaser, wherein zener diode is connected across electric current
The two sides of the power supply of mutual inductor upper and lower ends, pressure stabilizing value are exactly overvoltage protection action value, when electric network fault or power grid electricity
Press it is unstable zener diode conducting, there is residual current in current transformer primary side when causing voltage to increase to be more than setting value,
Secondary side generates low current and controls reed relay and buckle releaser movement, cutting after rectified circuit and thyristor processing are amplified
Electric network source plays a protective role, and the voltage of power overload protection arrangement detection for embodying the utility model is fine, induction spirit
It is quick, and actuation time is fast.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, embodiment or the relevant technologies will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, it is practical new that the accompanying drawings in the following description merely relates to this
Some embodiments of type, are not limitation of the utility model.
Fig. 1 is the circuit diagram of the voltage of power overload protection arrangement of the utility model preferred embodiment.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have
Body embodiment makees further unrestricted detailed description to technical solutions of the utility model.
The voltage of power overload protection arrangement of the present embodiment is mainly used for preventing voltage being more than that limit value causes electrical overloads,
Play electic protection.
See that Fig. 1, the voltage of power overload protection arrangement of the present embodiment mainly include Current Transmit, zener diode
D1, rectification circuit, thyristor VT, reed relay K1 and buckle releaser (not shown).Current Transmit is coupled in AC power source
(alternating current) side；Zener diode D1 is connected across the two sides of the power supply of Current Transmit upper and lower ends, and zener diode D1's is steady
Pressure value is 240V；Rectification circuit is bridge rectifier, is made of four diodes (VD1-VD4), the input terminal of rectification circuit with
The secondary side of Current Transmit intercouples, for the alternating current of the secondary side output of Current Transmit to be converted to direct current
Electricity, for the use of rear class component；The control terminal and anode of thyristor VT is coupled with the output end of rectification circuit respectively, by electric current
Whether the secondary side of mutual inductor CT exports current control, and having electric current, then thyristor VT is connected, and then thyristor VT is turned off no current；Tongue
The coil of spring relay K1 is coupled with the cathode of thyristor VT, and reed contact is coupled with buckle releaser；Buckle releaser is serially connected in alternating current
Source (alternating current) side when buckle releaser energized action, will cut off AC power line.
The voltage of power overload protection arrangement of the present embodiment further includes being made of resistance R1 and capacitor C1 parallel with one another
Filter circuit, the filter circuit are coupled between the secondary side of Current Transmit and rectification circuit, and the filter circuit is for filtering
Except the clutter of secondary side output electric current, to improve the conversion accuracy of rectification circuit, the final execution precision for improving rear class component.
The voltage of power overload protection arrangement of the present embodiment further includes varistor RV, and varistor RV is connected across brilliant lock
The yin-yang two-stage of pipe VT absorbs extra electric current for carrying out voltage clamping when circuit bears over-voltage to protect thyristor VT.
The voltage of power overload protection arrangement of the present embodiment further includes being serially connected by resistance R2, capacitor C2 and diode D2
The start-up circuit of composition, the start-up circuit are connected across between the anode and control electrode of thyristor VT.Above-mentioned series circuit is to utilize
The impulse electricity stream of capacitor C2 as thyristor VT trigger current, realize thyristor VT conducting, when thyristor VT anode,
When cathode connects direct current, since this direct current simultaneously will be by the control electrode of thyristor VT, diode D1, resistance R2 then
It charges to capacitor C2, current direction is that capacitor C2, resistance R2, diode D2, thyristor VT are flowed through by the anode of thyristor VT
Control electrode finally reaches the cathode of thyristor VT, due to having forward voltage between the anode of thyristor VT, cathode at this time, so
Thyristor VT is just begun to turn on.Certainly, the not no start-up circuit, and rectification circuit output is directly connected to by thyristor VT control electrode
The conducting of thyristor VT also may be implemented in end, but effect is poor, and thyristor VT is easy to burn out.
The voltage of power overload protection arrangement of the present embodiment further includes buzzer H1, buzzer H1 and reed relay K1
Parallel with one another, when reed relay K1 obtains electric, buzzer H1 is electricly same, plays the alarm function that pipes.
In conclusion the voltage of power overload protection arrangement of the present embodiment carries out overvoltage protection, inspection using zener diode
It surveys finely, incudes sensitive；Dump is carried out using thyristor VT, reed relay K1 and buckle releaser, actuation time is fast, preferably
Play voltage overload defencive function in ground；Warning function is realized using buzzer.
It should be pointed out that above-mentioned preferred embodiment is only to illustrate the technical ideas and features of the present invention, purpose
It is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly, this reality can not be limited with this
With novel protection scope.All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover in this reality
Within novel protection scope.
Claims (8)
1. a kind of voltage of power overload protection arrangement, it is characterised in that: including current transformer, zener diode, rectification circuit,
Thyristor, reed relay and buckle releaser, wherein
Current transformer is coupled in alternating current source；
Zener diode is connected across the two sides of the power supply of current transformer upper and lower ends；
The input terminal of rectification circuit and the secondary side of current transformer intercouple；
Thyristor, reed relay are serially connected, and are coupled in the output end of rectifier circuit；
Buckle releaser is serially connected in alternating current source, and couples with reed relay.
2. voltage of power overload protection arrangement according to claim 1, it is characterised in that: it further include filter circuit, the filter
Wave circuit is coupled between the secondary side of current transformer and rectification circuit.
3. voltage of power overload protection arrangement according to claim 2, it is characterised in that: the filter circuit is by mutually simultaneously
The resistance R1 and capacitor C1 of connection are formed.
4. voltage of power overload protection arrangement according to claim 1, it is characterised in that: it further include varistor, the pressure
Quick resistance and thyristor are parallel with one another.
5. voltage of power overload protection arrangement according to claim 1, it is characterised in that: further include resistance R2, capacitor C2
Be serially connected with diode D2, resistance R2, capacitor C2 and diode D2, and be connected across thyristor anode and control electrode it
Between.
6. voltage of power overload protection arrangement according to claim 1, it is characterised in that: it further include buzzer, the buzzing
Device is parallel with one another with reed relay.
7. voltage of power overload protection arrangement according to claim 1, it is characterised in that: the pressure stabilizing of the zener diode
Value is 240V.
8. voltage of power overload protection arrangement according to claim 1, it is characterised in that: the rectification circuit is that bridge-type is whole
Current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238606.7U CN209250217U (en) | 2019-02-26 | 2019-02-26 | Voltage of power overload protection arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920238606.7U CN209250217U (en) | 2019-02-26 | 2019-02-26 | Voltage of power overload protection arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209250217U true CN209250217U (en) | 2019-08-13 |
Family
ID=67537183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920238606.7U Expired - Fee Related CN209250217U (en) | 2019-02-26 | 2019-02-26 | Voltage of power overload protection arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209250217U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327019A (en) * | 2020-03-10 | 2020-06-23 | 郑州航空工业管理学院 | Electronic automatic switch |
-
2019
- 2019-02-26 CN CN201920238606.7U patent/CN209250217U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111327019A (en) * | 2020-03-10 | 2020-06-23 | 郑州航空工业管理学院 | Electronic automatic switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190813 Termination date: 20200226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |