CN205670680U - A kind of power distribution equipment with overvoltage protection - Google Patents
A kind of power distribution equipment with overvoltage protection Download PDFInfo
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- CN205670680U CN205670680U CN201620550367.5U CN201620550367U CN205670680U CN 205670680 U CN205670680 U CN 205670680U CN 201620550367 U CN201620550367 U CN 201620550367U CN 205670680 U CN205670680 U CN 205670680U
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- discharging tube
- outfan
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- solid discharging
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Abstract
This utility model provides a kind of power distribution equipment with overvoltage protection, including: distributing box；Over voltage alarm circuit, overvoltage crowbar, current foldback circuit, regulator rectifier circuit it is provided with in distributing box；The two ends of solid discharging tube two are connected with power line respectively, and solid discharging tube one and solid discharging tube three are connected, the junction point ground connection of solid discharging tube one and solid discharging tube three；Electric fuse one and electric fuse two are respectively provided with on the power line；The voltage input end both sides of step-down transformer connect power line respectively, the voltage output end of step-down transformer is connected with two ac input ends of rectifier bridge respectively, the positive DC outfan of rectifier bridge is connected with capacitive filter positive pole, and the negative DC outfan of rectifier bridge is connected with capacitive filter negative pole.Power distribution equipment is relative to prior art, and to overvoltage fast response time, overvoltage protection is effective, eliminates the Line over-voltage harm to equipment.
Description
Technical field
This utility model relates to field of power distribution, particularly relates to a kind of power distribution equipment with overvoltage protection.
Background technology
Distribution box is, by electrical wiring requirement, switchgear, measuring instruments, protection electrical equipment and auxiliary equipment are assembled in envelope
Close or in semiclosed metal safe, constitute low-voltage distribution equipment.Can connect or disjunction by manual or automatic switch time properly functioning
Circuit.Circuit or warning is cut off by protection electrical equipment when fault or irregular operating.By means of measuring instruments can show operating respectively
Plant parameter, also some electric parameter can be adjusted, deviation normal operating conditions is pointed out or sent signal.It is usually used in
Each, join, in electric substation.Distribution box mainly includes power distribution cabinet, distribution board, switchboard etc., is to install switch, instrument etc. concentratedly to set
Standby complexes.
Existing over-current over-voltage protection is typically to increase by an inspection leakage resistance at the outfan of circuit, when output electric current is excessive
Time, the voltage through inspection leakage resistance raises, and the Voltage Feedback at inspection leakage resistance two ends, to power control terminal, controls end and exception detected
Signal and turn off control, make output turn off.But, the overcurrent-overvoltage in circuit cannot be consumed in circuit, causes being connected to
The equipment of outfan is the most damaged.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, the purpose of this utility model is, it is provided that one has overvoltage and protects
The power distribution equipment protected, including: distributing box；It is provided with over voltage alarm circuit, overvoltage crowbar in described distributing box, crosses stream guarantor
Protection circuit, regulator rectifier circuit；
The input of described over voltage alarm circuit is connected with distributing box electric power incoming line, the output of described over voltage alarm circuit
End is connected with the input of overvoltage crowbar, and the outfan of described overvoltage crowbar connects with the input of current foldback circuit
Connecing, the outfan of current foldback circuit is connected with the input of regulator rectifier circuit；
Described over voltage alarm circuit includes: resistance R1, resistance R2, alarm lamp L；
First end of resistance R1 and first end of resistance R2 are connected with distributing box electric power incoming line respectively, alarm lamp L
The first end, second end of resistance R1, second end of resistance R2 be simultaneously connected with, the second end ground connection of alarm lamp L；
Described overvoltage crowbar includes: solid discharging tube one, solid discharging tube two, solid discharging tube three；
The two ends of solid discharging tube two are connected with power line respectively, and solid discharging tube one and solid discharging tube three are connected, Gu
The junction point ground connection of body discharge tube one and solid discharging tube three；
Described current foldback circuit includes: electric fuse one and electric fuse two；Electric fuse one and electric fuse two are separately positioned on
On power line；
Described regulator rectifier circuit includes: step-down transformer, rectifier bridge, capacitive filter and three terminal regulator, described fall
The voltage input end both sides of pressure transformer connect power line respectively, the voltage output end of described step-down transformer respectively with rectifier bridge
Two ac input ends connect, and the positive DC outfan of described rectifier bridge is connected with capacitive filter positive pole, described rectifier bridge
Negative DC outfan is connected with capacitive filter negative pole, and the input of described three terminal regulator and sampling end are filtered with electric capacity respectively
Ripple device positive pole and negative pole connect, and the outfan of described three terminal regulator is connected with by electric loading.
Preferably, electric fuse one uses resettable fuse.
Preferably, electric fuse two uses resettable fuse.
Preferably, described distributing box also includes: charging device, accumulator, inverter and power supply switch circuit；
Power supply switch circuit includes the permutator being arranged on distributing box；
The input of described power supply switch circuit is connected with the outlet side of current foldback circuit；
The input of charging device is connected with the outfan of power supply switch circuit, and the outfan of described charging device is by inverse
Become device to be connected with the charging end of accumulator；The feeder ear of accumulator is connected with regulator rectifier circuit by inverter.
As can be seen from the above technical solutions, this utility model has the advantage that
Power distribution equipment is relative to prior art, and to overvoltage fast response time, overvoltage protection is effective, eliminates Line over-voltage
Harm to equipment.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical solution of the utility model, the accompanying drawing used required in describing will be made below
Introduce simply, it should be apparent that, the accompanying drawing in describing below is only embodiments more of the present utility model, for this area
From the point of view of those of ordinary skill, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the overall schematic of power distribution equipment；
Fig. 2 is the circuit diagram of over voltage alarm circuit, overvoltage crowbar, current foldback circuit；
Fig. 3 is the circuit diagram of regulator rectifier circuit；
Fig. 4 is the schematic diagram of power distribution equipment preferred embodiment.
Detailed description of the invention
For making the purpose of this utility model, feature, the advantage can be the most obvious and understandable, concrete below in conjunction with this
Accompanying drawing in embodiment, is clearly and completely described the technical scheme in this utility model, it is clear that disclosed below
Embodiment is only a part of embodiment of this utility model, and not all embodiment.Based on the embodiment in this patent, ability
All other embodiments that territory those of ordinary skill is obtained under not making creative work premise, broadly fall into this patent and protect
The scope protected.
This utility model provides a kind of power distribution equipment with overvoltage protection, includes as shown in Figure 1, Figure 2, Figure 3 shows: distribution
Casing；Over voltage alarm circuit 1, overvoltage crowbar 2, current foldback circuit 3, regulator rectifier circuit 4 it is provided with in distributing box；
The input of over voltage alarm circuit 1 is connected with distributing box electric power incoming line 5, the outfan of over voltage alarm circuit 1 with
The input of overvoltage crowbar 2 connects, and the outfan of overvoltage crowbar 2 is connected with the input of current foldback circuit 3, mistake
The outfan of stream protection circuit 3 is connected with the input of regulator rectifier circuit 4；
Over voltage alarm circuit 1 includes: resistance R1, resistance R2, alarm lamp L；First end of resistance R1 and resistance R2's
First end is connected with distributing box electric power incoming line respectively, first end of alarm lamp L, second end of resistance R1, resistance R2
Second end is simultaneously connected with, the second end ground connection of alarm lamp L；
Overvoltage crowbar 2 includes: solid discharging tube 1, solid discharging tube 2 11, solid discharging tube 3 13；Solid is put
The two ends of fulgurite 2 11 are connected with power line respectively, solid discharging tube 1 and solid discharging tube 3 13 series connection, solid discharging tube
One 12 and the junction point ground connection of solid discharging tube 3 13；
Current foldback circuit 3 includes: electric fuse one F1 and electric fuse two F2；Electric fuse one F1 and electric fuse two F2 sets respectively
Put on the power line；Power line in the present embodiment is biphase electricity.
Regulator rectifier circuit 4 includes step-down transformer T, rectifier bridge D, capacitive filter C1 and three terminal regulator SAW, fall
The voltage input end both sides of pressure transformer T connect power line respectively, and the voltage output end of step-down transformer T is respectively with rectifier bridge D's
Two ac input ends connect, and the positive DC outfan of rectifier bridge D is connected with capacitive filter C1 positive pole, and the negative pole of rectifier bridge is straight
Stream outfan be connected with capacitive filter C1 negative pole, the input of three terminal regulator SAW and sampling end respectively with capacitive filter
C1 positive pole and negative pole connect, the outfan of three terminal regulator SAW respectively with electric capacity C2 and being connected by electric loading.
When overvoltage does not occurs, electric fuse one F1, electric fuse two F2, solid discharging tube 1, solid discharging tube 2 11, solid
Discharge tube 3 13 is in normality, and power distribution equipment normally works.
When occurring overvoltage on communication line, self-healing electric fuse one F1 and self-healing electric fuse two F2 presents height
Resistance state, consumes overvoltage energy.Solid discharging tube 1, solid discharging tube 2 11, the breakdown conducting of solid discharging tube 3 13, and then
Overvoltage energy expenditure is fallen.Meanwhile, alarm lamp L lights, and plays early warning effect.
Electric fuse one F1 uses resettable fuse.Electric fuse two F2 uses resettable fuse.
In the present embodiment, as shown in Figure 4, distributing box also includes: charging device 8, accumulator 10, inverter 9 and electricity
Source switching circuit 7；Power supply switch circuit 7 includes the permutator being arranged on distributing box；Permutator is used for controlling power supply
To being turned on and off of accumulator 10.The input of power supply switch circuit 7 is connected with the outlet side of current foldback circuit 4；Charging
The input of device 8 is connected with the outfan of power supply switch circuit 7, and the outfan of charging device 8 passes through inverter 9 and accumulator
The charging end of 10 connects；The feeder ear of accumulator 10 is connected with regulator rectifier circuit 4 by inverter.
So power-on switching circuit 7, makes external power pass through charging device 8 and inverter 9 charges to accumulator 10.
When accumulator 10 needs powering load, accumulator 10 supplies to load by inverter 9 and regulator rectifier circuit 4
Electricity.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.
Term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing, " second ", " the 3rd "
(if present) such as " the 4 " is for distinguishing similar object, without being used for describing specific order or precedence.Should
The data that this understanding so uses can be exchanged in the appropriate case, in order to embodiment of the present utility model described herein can
Implement with the order in addition to those here illustrating or describing.Additionally, term " includes " and " having " and they
Any deformation, it is intended that cover non-exclusive comprising.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this practicality new
Type.Multiple amendment to these embodiments will be apparent from for those skilled in the art, is determined herein
The General Principle of justice can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.Cause
This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (4)
1. a power distribution equipment with overvoltage protection, it is characterised in that including: distributing box；It is provided with in described distributing box
Over voltage alarm circuit, overvoltage crowbar, current foldback circuit, regulator rectifier circuit；
The input of described over voltage alarm circuit is connected with distributing box electric power incoming line, the outfan of described over voltage alarm circuit with
The input of overvoltage crowbar connects, and the outfan of described overvoltage crowbar is connected with the input of current foldback circuit,
The outfan of current foldback circuit is connected with the input of regulator rectifier circuit；
Described over voltage alarm circuit includes: resistance (R1), resistance (R2), alarm lamp (L)；
First end of resistance (R1) and the first end of resistance (R2) are connected with distributing box electric power incoming line respectively, alarm lamp
(L) the first end, the second end of resistance (R1), the second end of resistance (R2) are simultaneously connected with, the second termination of alarm lamp (L)
Ground；
Described overvoltage crowbar includes: solid discharging tube one, solid discharging tube two, solid discharging tube three；
The two ends of solid discharging tube two are connected with power line respectively, and solid discharging tube one and solid discharging tube three are connected, and solid is put
The junction point ground connection of fulgurite one and solid discharging tube three；
Described current foldback circuit includes: electric fuse one and electric fuse two；Electric fuse one and electric fuse two are separately positioned on power supply
On line；
Described regulator rectifier circuit includes: step-down transformer, rectifier bridge, capacitive filter and three terminal regulator, and described blood pressure lowering becomes
The voltage input end both sides of depressor connect power line respectively, the voltage output end of described step-down transformer respectively with two friendships of rectifier bridge
Stream input connects, and the positive DC outfan of described rectifier bridge is connected with capacitive filter positive pole, the negative pole of described rectifier bridge
DC output end is connected with capacitive filter negative pole, the input of described three terminal regulator and sampling end respectively with capacitive filter
Positive pole and negative pole connect, and the outfan of described three terminal regulator is connected with by electric loading.
The power distribution equipment with overvoltage protection the most according to claim 1, it is characterised in that
Electric fuse one uses resettable fuse.
The power distribution equipment with overvoltage protection the most according to claim 1, it is characterised in that
Electric fuse two uses resettable fuse.
The power distribution equipment with overvoltage protection the most according to claim 1, it is characterised in that
Described distributing box also includes: charging device, accumulator, inverter and power supply switch circuit；
Power supply switch circuit includes the permutator being arranged on distributing box；
The input of described power supply switch circuit is connected with the outlet side of current foldback circuit；
The input of charging device is connected with the outfan of power supply switch circuit, and the outfan of described charging device passes through inverter
It is connected with the charging end of accumulator；The feeder ear of accumulator is connected with regulator rectifier circuit by inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620550367.5U CN205670680U (en) | 2016-06-08 | 2016-06-08 | A kind of power distribution equipment with overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620550367.5U CN205670680U (en) | 2016-06-08 | 2016-06-08 | A kind of power distribution equipment with overvoltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205670680U true CN205670680U (en) | 2016-11-02 |
Family
ID=57190874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620550367.5U Active CN205670680U (en) | 2016-06-08 | 2016-06-08 | A kind of power distribution equipment with overvoltage protection |
Country Status (1)
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| CN (1) | CN205670680U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025087A (en) * | 2019-12-31 | 2020-04-17 | 安徽东方旭电气设备有限公司 | Novel distribution network circuit abnormal alarm device |
| CN117477511A (en) * | 2023-12-28 | 2024-01-30 | 苏州元脑智能科技有限公司 | Protection circuit and multi-configuration power supply method, device, equipment and medium thereof |
-
2016
- 2016-06-08 CN CN201620550367.5U patent/CN205670680U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025087A (en) * | 2019-12-31 | 2020-04-17 | 安徽东方旭电气设备有限公司 | Novel distribution network circuit abnormal alarm device |
| CN117477511A (en) * | 2023-12-28 | 2024-01-30 | 苏州元脑智能科技有限公司 | Protection circuit and multi-configuration power supply method, device, equipment and medium thereof |
| CN117477511B (en) * | 2023-12-28 | 2024-03-22 | 苏州元脑智能科技有限公司 | Protection circuit and multi-configuration power supply method, device, equipment and medium thereof |
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| GR01 | Patent grant |