CN202586332U - Strong type large through-flow capacity surge protector - Google Patents
Strong type large through-flow capacity surge protector Download PDFInfo
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- CN202586332U CN202586332U CN 201120349920 CN201120349920U CN202586332U CN 202586332 U CN202586332 U CN 202586332U CN 201120349920 CN201120349920 CN 201120349920 CN 201120349920 U CN201120349920 U CN 201120349920U CN 202586332 U CN202586332 U CN 202586332U
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- zinc oxide
- oxide varistor
- plug connector
- surge protector
- spark gap
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Abstract
The utility model discloses a strong type large through-flow capacity surge protector possessing a structure as follows: firstly, serially connecting a lower end of parallel zinc oxide varistors with a high energy spark gap; secondly, adding a self-recovery insurance resistor and a gas discharge tube series branch and parallelly connecting with a plurality of zinc oxide varistors; thirdly, connecting a positive temperature coefficient thermistor at an entrance of large lightning stroke current intrusion; and fourthly, connecting a decoupling inductor in a circuit, wherein all the components are filled in a housing, are in connection with a base through a first splicing member, a second splicing member and a third splicing member and are in external connection with a power supply and low voltage electrical equipment to be protected through the base. The strong type large through-flow capacity surge protector has a small size, light weight and a shunting coefficient of 0.9 and is an intelligent surge protector which is hard to break in real sense.
Description
Technical field
The utility model belongs to low-voltage distribution apparatus lightning surge protector class.
Background technology
Both at home and abroad to the big current protection of thunderbolt of 220/380V low-voltage distribution apparatus, all adopt series connection high-energy spark gap and zinc oxide varistor (MOV) at present.The advantage of high-energy spark gap is the big thunder-strike current of releasing, but after the discharge conducting power frequency continued flow is arranged, and deboost is high.Zinc oxide varistor (MOV) advantage is, action the no afterflow in back, and deboost is not too high, but through-current capacity is less than discharging gap, and monolithic zinc oxide varistor (MOV) through-current capacity generally is no more than 60kA, can not be used for the above protection of thunder-strike current greatly of 60kA.Is for 100～200kA, how the big thunder-strike current of 8/20 μ S protected so? A simple idea is to adopt multi-disc zinc oxide varistor (MOV) parallel connection.This also be the utility model the content that will describe.
Usually traditional method is, for the zinc oxide varistor (MOV) of parallel connection, except that the every equal fluid element of series connection; Also must be through selecting meticulously; The strict coupling of parameters, dynamically VA characteristic curve overlaps, and this increases very big workload and apolegamy difficulty in practice.Even so, two when parallelly connected, the shunting usage factor of every zinc oxide varistor (MOV) is general≤and 0.8, and parallelly connected sheet number is many more, and diverting coefficient is low more.Therefore parallel connection use zinc oxide varistor (MOV) is not advised even opposed in some company both at home and abroad, thinks that parallel connection technology is complicated, and cost heightens, and cost performance is not high.Up to the present, for the 100～200kA that possibly occur, the big thunder-strike current of 8/20 μ S does not have good protection scheme.
Summary of the invention
The purpose of the utility model is to provide a kind of strong type big discharge capacity surge protector, and this protector adopts multi-disc zinc oxide varistor parallel technology, and every zinc oxide varistor will obtain the protection of inner other elements.The zinc oxide varistor of parallel connection only requires that model specification is identical, and nominal parameter is identical, does not need strictness to select and match, and this can simplify technology greatly, reduces labour intensity, is easy to practicability.A whole set of protector is placed in the shell of a standard; The formation volume is little, in light weight, diverting coefficient reaches 0.9 the big discharge capacity surge protector of strong type; Apply 150kA at its input; During the heavy impulse current of 8/20 μ S, output records maximum limit voltage less than 1.5kV, and each element of protector is in proper working order.Become the quasi intelligent surge protector that does not rot truly.
The utility model solves the technical scheme that its problem adopted: at first, and the series connection high-energy spark gap in parallelly connected zinc oxide varistor lower end, secondly; Add one from recovering insurance resistance and gas discharge tube series arm, parallelly connected with the multi-disc zinc oxide varistor again, the 3rd; In the porch that big thunder-strike current is invaded; Insert semistor, the 4th, in circuit, insert the decoupling inductor;
More than all components and parts pack in the shell, is connected with base through first plug connector, second plug connector, the 3rd plug connector then, protect low voltage electrical equipment through base external power supply and quilt;
Wherein, first plug connector, semistor, recovery insurance resistance, gas discharge tube, high-energy spark gap, second plug connector series connection earlier certainly are in second inner casing of packing into then;
Zinc oxide varistor M1, zinc oxide varistor M2, zinc oxide varistor M3 parallel connection is earlier connected with decoupling inductor, the 3rd plug connector, in first inner casing of packing into then again;
End with the decoupling inductor is connected in series with an end of semistor then, and the lower end of parallelly connected Zinc-oxide piezoresistor is connected in series with an end of high-energy spark gap, at last first inner casing and second inner casing is packed in the shell together.
At first, the series connection high-energy spark gap in parallelly connected zinc oxide varistor lower end under the normal working voltage, is eliminated zinc oxide varistor leakage current and heating aging phenomenon.Discharge conducting during thunderbolt, the big electric current of releasing.
Secondly, add one from recovering insurance resistance (2) and gas discharge tube (3) series arm, parallelly connected with the multi-disc zinc oxide varistor again.During thunderbolt; Under the situation that high-energy spark gap and zinc oxide varistor all move; When the deboost of a slice zinc oxide varistor reached predefined criticality safety value, gas discharge tube (3) punctured, and zinc oxide varistor is implemented protection.Choose reasonable gas discharge tube (3) and recover insurance resistance (2) parameter certainly can make the big electric current of thunderbolt through every zinc oxide varistor be no more than specified discharge capacity, and the voltage at two ends is less than the maximum constraints voltage of zinc oxide varistor.
The 3rd, in the porch that big thunder-strike current is invaded, insert semistor (1), in case oxidation zinc varistor is burnt under the lasting big function of current.
The 4th, in circuit, insert decoupling inductor (5), lightning wave amplitude and leading-edge steepness are further reduced.
The beneficial effect of the utility model is: for 100～200kA; The big thunder-strike current of 8/20 μ S; After through a series of inhibition of big discharge capacity surge protector of strong type and decay, become by the low amplitude value of protecting low voltage electrical equipment to bear and the shock wave of low steepness.Thereby make by the protection low voltage electrical equipment and obtain safe and reliable protection.A whole set of protector is placed in the shell of a standard, and volume is little, in light weight.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the circuit theory diagrams of the utility model.
Fig. 2 is the outside drawing of the utility model.
Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11 are the utility model embodiment projection views.
Figure 12, Figure 13, Figure 14, Figure 15, Figure 16, Figure 17, Figure 18, Figure 19, Figure 20 are the embodiment cutaway views of the utility model.
Among the figure 1, semistor, 2, recover insurance resistance certainly, 3, gas discharge tube, 4, the high-energy spark gap; 5, decoupling inductor, 6, protected low voltage electrical equipment, 7, zinc oxide varistor M1,8, zinc oxide varistor M2; 9, zinc oxide varistor M3,10, shell, 11, base, 12, first inner casing; 13, second inner casing, 14, first plug connector, 15, second plug connector, the 16, the 3rd plug connector; A-A, analyse and observe mark 1, B-B, analyse and observe mark 2, C-C, analyse and observe mark 3, D-D, analyse and observe mark 4.
Embodiment
In Fig. 1, L end and N termination 220V low-tension supply are the big discharge capacity surge protector of the described strong type of the utility model in the frame of broken lines.As 100～200kA; The big thunder-strike current shock wave of 8/20 μ S u invades from live wire L, when voltage peak surpasses the puncture voltage of high-energy spark gap (4), and high-energy spark gap (4) discharge conducting; Aisle resistance is very little; 100～200kA, the big thunder-strike current shock wave of 8/20 μ S u is added to parallelly connected zinc oxide varistor M1, M2 through semistor (1) ... Mn is last.Select and match owing to zinc oxide varistor and without strictness, the pressure sensitive voltage of each sheet (rated voltage) U1mA also not exclusively equates, and is also inequality to the shunting size of big thunder-strike current.If the actual pressure sensitive voltage U1mA of zinc oxide varistor M1 is lower, it is the excessive thunder-strike current of stream of action and begin the clamp pressure limiting at first.The thunder-strike current that zinc oxide varistor M1 passes through is big more, and deboost is high more.When the deboost of zinc oxide varistor M1 surpasses zinc oxide varistor M2 ... During the pressure sensitive voltage of zinc oxide varistor Mn, zinc oxide varistor M2 ... Zinc oxide varistor Mn successive relay trip is shunted big thunder-strike current jointly.
As zinc oxide varistor M1, M2 ... When the deboost of Mn a slice reaches predefined criticality safety value, the gas discharge tube in the parallel branch (3) disruptive discharge.The breakdown voltage value of choose reasonable gas discharge tube (3) and recover the resistance and the power of insurance resistance (2) certainly; Can make each parallelly connected zinc oxide varistor reach best current-sharing effect; Make the big thunder-strike current that flows through every zinc oxide varistor be no more than specified discharge capacity, the parallel branch voltage is less than the maximum constraints voltage of monolithic zinc oxide varistor.
The effect of semistor among Fig. 1 (1) is that restriction zinc oxide varistor and discharging gap flow through the long-time big electric current that continues.When the afterflow of flowing through semistor (1) increased, temperature increased, and resistance increases automatically, made to continue big electric current and be reduced to the current value that parallelly connected zinc oxide varistor and discharging gap can bear automatically for a long time.
Lightning surge u shunts pressure limiting through zinc oxide varistor; After further reducing its amplitude and leading-edge steepness through series connection decoupling inductor (5) again; Arrive output L ' end and N ' end; They also are connected to by protection low voltage electrical equipment (6) two ends, obtain safe and reliable protection thereby make by protection low voltage electrical equipment (6).
Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15, Figure 16, Figure 17, Figure 18, Figure 19, embodiment illustrated in fig. 20 in; All components and parts are packed in the shell (10); Be connected with base (11) through first plug connector (14), second plug connector (15), the 3rd plug connector (16) then, through the base external power supply with by the protection low voltage electrical equipment.In Fig. 4, first plug connector (14), semistor (1), recovery insurance resistance (2), gas discharge tube (3), high-energy spark gap (4), second plug connector (15) series connection earlier certainly are in second inner casing (13) of packing into then.Zinc oxide varistor M1 (7), zinc oxide varistor M2 (8), zinc oxide varistor M3 (9) parallel connection is earlier connected with decoupling inductor (5), the 3rd plug connector (16), in first inner casing (12) of packing into then again.End with decoupling inductor (5) is connected in series with an end of semistor (1) then; The lower end of parallel connection Zinc-oxide piezoresistor M1, M2, M3 is connected in series with an end of high-energy spark gap (4), at last first inner casing (12) and second inner casing (13) is packed in the shell (10) together.
Parallel connection zinc oxide varistor M1, M2, M3 select pressure sensitive voltage 510V for use, 3 parallel connections of maximum discharge capacity 60kA (8/20 μ S); High-energy spark gap (4) is selected working volts alternating current 400V for use, and gas discharge tube (3) is selected discharge voltage 1400V for use, recovers insurance resistance (2) certainly and selects resistance value 3.3 Ω for use; Power 5W, semistor (1) is selected resistance value 10 Ω, power 5W for use; 80 ℃ of Curie temperature, decoupling inductor (5) are selected inductance value 7.5 μ H for use.
Above element is contained in the modular housing, constitutes the big discharge capacity surge protector of strong type.Apply 150kA at its input, during the heavy impulse current of 8/20 μ S, output records maximum limit voltage less than 1.5kV, and each element of protector is in proper working order.
Claims (1)
1. big discharge capacity surge protector of strong type is characterized in that: at first, and the series connection high-energy spark gap (4) in parallelly connected zinc oxide varistor lower end; Secondly, add one from recovering insurance resistance (2) and gas discharge tube (3) series arm, parallelly connected with the multi-disc zinc oxide varistor again; The 3rd, in the porch that big thunder-strike current is invaded, insert semistor (1); The 4th, in circuit, insert decoupling inductor (5);
More than all components and parts pack in the shell (10), is connected with base (11) through first plug connector (14), second plug connector (15), the 3rd plug connector (16) then, protect low voltage electrical equipment (6) through base (11) external power supply and quilt;
Wherein, first plug connector (14), semistor (1), recovery insurance resistance (2), gas discharge tube (3), high-energy spark gap (4), second plug connector (15) series connection earlier certainly are in second inner casing (13) of packing into then;
Zinc oxide varistor M1 (7), zinc oxide varistor M2 (8), zinc oxide varistor M3 (9) parallel connection is earlier connected with decoupling inductor (5), the 3rd plug connector (16), in first inner casing (12) of packing into then again;
End with decoupling inductor (5) is connected in series with an end of semistor (1) then; The lower end of parallel connection Zinc-oxide piezoresistor is connected in series with an end of high-energy spark gap (4), at last first inner casing (12) and second inner casing (13) is packed in the shell (10) together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120349920 CN202586332U (en) | 2011-09-19 | 2011-09-19 | Strong type large through-flow capacity surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120349920 CN202586332U (en) | 2011-09-19 | 2011-09-19 | Strong type large through-flow capacity surge protector |
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| CN202586332U true CN202586332U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120349920 Expired - Fee Related CN202586332U (en) | 2011-09-19 | 2011-09-19 | Strong type large through-flow capacity surge protector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050952A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Bus type large-capacity overvoltage protection device |
| CN103219112A (en) * | 2013-04-18 | 2013-07-24 | 广东明家科技股份有限公司 | Fireproof and explosion-proof varistor |
| CN104253423A (en) * | 2013-06-27 | 2014-12-31 | 施耐德电器工业公司 | Surge protection device |
| CN104810814A (en) * | 2015-05-06 | 2015-07-29 | 厦门宏发开关设备有限公司 | Chase-flow surge protector |
-
2011
- 2011-09-19 CN CN 201120349920 patent/CN202586332U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050952A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Bus type large-capacity overvoltage protection device |
| CN103219112A (en) * | 2013-04-18 | 2013-07-24 | 广东明家科技股份有限公司 | Fireproof and explosion-proof varistor |
| CN103219112B (en) * | 2013-04-18 | 2015-12-02 | 广东明家科技股份有限公司 | A kind of fire-proof and explosion-proof type piezo-resistance |
| CN104253423A (en) * | 2013-06-27 | 2014-12-31 | 施耐德电器工业公司 | Surge protection device |
| CN104810814A (en) * | 2015-05-06 | 2015-07-29 | 厦门宏发开关设备有限公司 | Chase-flow surge protector |
| CN104810814B (en) * | 2015-05-06 | 2018-06-08 | 厦门宏发开关设备有限公司 | A kind of big through-flow surge protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Zhongketianli Electronic Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Beijing Zhongketianli Electronic Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20140919 |
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| EXPY | Termination of patent right or utility model |