CN1599185A - Three-phase AC shockproof device for communication equipment - Google Patents
Three-phase AC shockproof device for communication equipment Download PDFInfo
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- CN1599185A CN1599185A CN 200410040321 CN200410040321A CN1599185A CN 1599185 A CN1599185 A CN 1599185A CN 200410040321 CN200410040321 CN 200410040321 CN 200410040321 A CN200410040321 A CN 200410040321A CN 1599185 A CN1599185 A CN 1599185A
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Abstract
The invention discloses a communication facility, three-phase alternating current lightning protection device. It includes overcurrent protector connecting with the phase conductors in series, lightning protection alarm instruction device connecting between the phase conductors and the zero line in series respectively, balance module protecting circuit, which includes the preliminary voltage dependent resistor connecting between the phase conductors and the zero line in series respectively, and common module protection circuit, which includes the secondary voltage dependent resistor connecting between the phase conductors and the zero line and the node in series respectively and the gas discharge tube connecting between the node and the ground wire. When the part needing protection gets effective protection, we don't set protection circuit between the phase conductors seldom needing protection. Because the common module protection circuit from the zero line to the ground wire adopts series connection between the voltage dependent resistor and the discharge tube, having taken the particularity of the zero line, we can save the overcurrent protector on the zero line.
Description
Technical field:
The present invention relates to a kind of communication equipment three-phase alternating current lightning protection device.
Background technology:
Communication low voltage electrical equipment such as high frequency switch power and no-break power unit anti-lightning impulse abilities such as (UPS) are lower; particularly along with the take on the telephone geometric growth of engineering and mobile communication business of village village; communication equipment has extended to vast rural area and mountain area now; and because the self-condition of China's rural power is poor; the safeguard measure deficiency; make to be installed in these local low pressure communication electric equipments and increased by the danger of power network overvoltage and thunderbolt, seriously threaten the stability of Electrical Safety and communication service.
The most frequently used solution is four piezo-resistances protected modes over the ground in this area, though it is simple, but exist protective capability poor, the problem that reliability is not high, have only common mode protection, (the differential mode protection is meant the protection of L-L between L-N between the phase line and the neutral line and the phase line to lack the differential mode protection; Common mode protection is meant the protection of N-PE between L-PE between phase line and the ground and the neutral line and the ground), lack overcurrent protection and fault indication function, do not meet the requirement of the lightning protection standard YD/T5098 of the Ministry of Information Industry to lightning protection for power supply.
For this reason, Chinese patent ZL98217538.8 and ZL01127874.9 have proposed scheme separately, and they possess differential mode common mode protective circuit, and have overcurrent protection and fault indication function, and applicability is strong.
But the place for inconvenience is safeguarded in remote rural area and mountain area also needs further to strengthen the particularly lightning protection capability of communication power supply equipment of low voltage electrical equipment, strengthens self reliability and fail safe of lightning protection device simultaneously, to reduce maintenance times.Such as, in ZL01127874.9, though it includes (as shown in Figure 1) simultaneously:
Differential mode protection-1: between phase line, L1-L2, RV4; L2-L3, RV5; L1-L3, RV6;
Differential mode protection-2: between phase line-neutral line, L1-N, RV1; L2-N, RV2; L3-N, RV3
Common mode protection: L1-PE, RV1+G1; L2-PE, RV2+G1; L3-PE, RV3+G1; N-PE, G1
But; as can be seen from Figure 1: " differential mode protection-2 " and " common mode protection " circuit 3 are pressure-sensitive to be shared; in case because the common mode thunderbolt causes pressure-sensitive damage; this circuit has just lost the protection of differential mode protection-2; otherwise; in case because differential mode protection-2 thunderbolts cause piezo-resistance to be damaged, this circuit has just lost the common mode protection, this in a word shared pressure-sensitive mode can not be taken into account the protection of two kinds of thunderbolt patterns.
Prior art shown in Figure 1 also has the another one shortcoming; owing to have only a gas discharge tube between the N-PE; when zero line band abnormal pressure; in case be struck by lightning; gas discharge tube self can burn owing to extinguishing power frequency continued flow, therefore, increases fuse F4; be used for the protective gas discharge tube in a single day can not extinguish since the thunderbolt cause internal arc the time, can be because of under the electric current that flows through for a long time, not burning.But by the analysis showed that, the fuse of Zeng Jiaing not only is difficult to play due effect herein, has reduced the reliability of lightning protection device on the contrary, because it has increased because of the caused alarm of fuse faults itself.
Summary of the invention:
Purpose of the present invention is exactly to provide a kind of communication equipment three-phase alternating current lightning protection device in order to overcome the above problems, and when improving the protection level of lightning protection device to communication power supply equipment, has strengthened self reliability and fail safe of lightning protection device.
For achieving the above object, the present invention proposes a kind of communication equipment three-phase alternating current lightning protection device, comprising: be connected in the over-current protection device on the phase line respectively; Be connected in the lightning protection alarm indicating device between phase line and the zero line respectively; It is characterized in that also comprising: the differential mode protective circuit comprises the first group of piezo-resistance that is connected in respectively between phase line and the zero line; The common mode protective circuit comprises the second group of piezo-resistance that is connected in respectively between phase line, zero line and the node, and is connected in the gas discharge tube between node and the ground wire; Described node is meant holding of gas discharge tube far awayly.
In an important embodiment of the present invention, shared three piezo-resistances in described differential mode protective circuit and common mode protective circuit, these three shared piezo-resistances are connected to common point to described phase line respectively; Also include two other piezo-resistance in the described piezo-resistance, respectively common point is connected to described zero line and ground wire, thereby form described differential mode protective circuit and common mode protective circuit respectively.
In another important embodiment of the present invention; used piezo-resistance is separately independently in described differential mode protective circuit and the common mode protective circuit; that is: the piezo-resistance in the differential mode protective circuit only is connected to the differential mode protective circuit; piezo-resistance in the common mode protective circuit only is connected to the common mode protective circuit, and differential mode protective circuit and common mode protective circuit form two loops independently separately.Described differential mode protective circuit and common mode protective circuit are positioned at the same side of described over-current protection device or lay respectively at the both sides of described over-current protection device.
Owing to adopted above scheme; the differential mode protective circuit is between each phase line and zero line; rather than between each phase line; make when the position that needs protection is effectively protected; between the less phase line that needs protection, protective circuit is set no longer; thereby the saving device reduces the fault point.And, because zero line adopts piezo-resistance and discharge tube series connection to ground wire, thereby can save the over-current protection device (as: protective tube) on the zero line, thereby further save device, reduced failure rate.As seen, the present invention has strengthened self reliability and fail safe of lightning protection device when improving the protection level of lightning protection device to communication power supply equipment.
Description of drawings:
Fig. 1 is a prior art lightning protection device schematic diagram.
Fig. 2 is the embodiment of the invention one schematic diagram.
Fig. 3 is the embodiment of the invention two schematic diagrames.
Fig. 4 is the embodiment of the invention three schematic diagrames.
Embodiment:
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
See Fig. 2, Fig. 3, Fig. 4, be depicted as three embodiment of the present invention, shown in communication equipment three-phase alternating current lightning protection device comprise phase line L1, L2, L3, zero line N and ground wire PE.The present invention is in series with at least one piezo-resistance (first group of piezo-resistance) respectively between described phase line L1, L2, L3 and zero line N, form differential mode protective circuit (among for example following embodiment one, two is, is two among the embodiment three); Be in series with at least one piezo-resistance (second group of piezo-resistance) and a gas discharge tube between described phase line L1, L2, L3 and the ground wire PE and between zero line N and the ground wire PE respectively, forming the common mode protective circuit; And only on described phase line L1, L2, L3, be in series with over-current protection device, on zero line N, do not establish over-current protection device.
Above-mentioned design must bring following characteristic and advantage: (1) N line does not add insurance, eliminates because the disconnected alarm that causes of N line insurance.(2) common mode is separated with the differential mode protective circuit, and Each performs its own functions.(3) N-PE reduces discharge tube and damages with " pressure-sensitive+discharge tube " replacement " discharge tube ".(4) lightning protection circuit between the special phase line L-L of cancellation, less components from being damaged.After having reached this purpose, protected breakdown rate has just reduced, and self damaging of lightning protection reduced, and alleviated and safeguarded pressure, reduced to the on-site maintenance number of times.(5) improve the through-current capability of lightning protection device by the parallel branch number that increases piezo-resistance.
It has been generally acknowledged that, not add fuse on the N line and just not possess overcurrent protection function, this just the present invention break through one of conventional characteristics.Why the N line does not add fuse in the present invention, is that N claims zero line again because the N line has the work characteristics different with the L line fully, and standard state N line voltage is 0V, and normal operation generally can not surpass 10V yet.And this patent is used piezo-resistance and gas discharge tube polyphone instead between N-PE, and piezo-resistance itself can play the effect of current-limiting resistance, can make the reliable blow-out of gas discharge tube.
With opposite on the N line, the present invention is provided with fuse on the L line.3 insurances on the L line mainly are 3 differential mode protective circuit (L1-N of protection; L2-N; L3-N) pressure-sensitive can not burnt; this is because the circuit between the L-N is low-impedance; in case pressure-sensitive damage is short-circuited; current in loop will be bigger, and reach the fusing value of insurance easily, thereby the protection piezo-resistance can not burnt.And if on the N line, also add insurance, because the earth side is the earth resistance that machine room is arranged, standard is 4 ohm, actual capabilities reach tens～tens ohm, so big impedance loop, even make the device short circuit between N-PE, also be difficult to occur the bigger current value that can impel N line fuse melting in the loop, this also is that this patent cancellation N line is insured silk and the reason of using the circuit of other more reliable pressure-sensitive and discharge tube polyphones instead.
This patent with in the past different was, this patent provides independently common mode protective circuit, and it is not shared promptly having the part piezo-resistance in common mode protective circuit and the differential mode protective circuit at least.
Cancelled the special differential mode protective circuit between phase line; this is because by a large amount of investigation to domestic and international industry communication equipment; what communication power supply equipment consumption was maximum, application thunderbolt environmental condition is the harshest is the three-phase power supply system that the single phase poaer supply module is formed; there is not power consumption equipment between the phase line; therefore do not need to do between the special phase line and protect; be equivalent to save 3 little pressure-sensitive branch roads of effect in the former patent like this, also reduced the fault point simultaneously.
Such scheme can have numerous embodiments, for example:
Embodiment one: see shown in Figure 2ly, its differential mode protective circuit is the protection between phase line-neutral line, comprising: the RV6 of L1-N; The RV7 of L2-N; The RV8 of L3-N.Its common mode protective circuit is the protection between phase line and the neutral line and the ground, comprises the RV9+GAP1 of L1-PE; The RV10+GAP1 of L2-PE; The RV11+GAP1 of L3-PE; The RV12+GAP1 of N-PE, wherein this paper that holds of gas discharge tube GAP1 is called Node B far awayly.
Can find out obviously that the common mode of present embodiment and the used piezo-resistance of differential mode protective circuit are separated, belong to each protection branch road respectively, can not have influence on other protection branch roads owing to the pressure-sensitive damage of a protected mode.
Embodiment two:
Be positioned at the same side (rear side) of described over-current protection device in differential mode protective circuit described in the foregoing description one and common mode protective circuit.Present embodiment then is the both sides that described differential mode protective circuit and common mode protective circuit are arranged at described over-current protection device respectively; as shown in Figure 3; it is the front that the common mode protective circuit is arranged on fuse on the basis of Fig. 2; fuse is between the two; at this moment; whether the work of common-mode circuit is not subjected to the restriction of fuse, and before promptly piezo-resistance in common-mode circuit or discharge tube damaged, the effect of common mode lightning protection existed always.The advantage of this embodiment has been to provide a kind of different protection strategy, and is particularly suitable for the situation that protective device of leakage current (RCD) is arranged in the supply line.
Embodiment three:
Common mode of the foregoing description one, two and the used piezo-resistance of differential mode protective circuit are distinct; used piezo-resistance is separately independently in described differential mode protective circuit and the common mode protective circuit; that is: the piezo-resistance in the differential mode protective circuit only is connected to the differential mode protective circuit; piezo-resistance in the common mode protective circuit only is connected to the common mode protective circuit, and differential mode protective circuit and common mode protective circuit form two loops independently separately.But the present invention does not repel the situation that the pressure-sensitive resistance of part can be shared in the protective circuit.As present embodiment is exactly like this:
As shown in Figure 4, shared four piezo-resistance RV1, RV2, RV3 and RV4 in described differential mode protective circuit and common mode protective circuit, they had both belonged to first group of piezo-resistance, belong to second group of piezo-resistance again, these four shared piezo-resistances are connected to common point A (these four shared piezo-resistances have common ends, and this paper just is called common point A) to described phase line L1, L2, L3 and zero line N respectively; Also include another one piezo-resistance RV5 in the described piezo-resistance, it only belongs to second group of piezo-resistance.RV4 and RV5 are connected to described zero line N and ground wire PE (passing through GAP1) to common point A respectively, thereby form described differential mode protective circuit and common mode protective circuit respectively.As seen, differential mode protective circuit and common mode protective circuit are just just separated from the beginning of A point, and one the tunnel is to link zero line N from RV4 to form the differential mode protective circuit, and another road is to link PE from RV5, GAP1 to form the common mode protective circuit.It is pointed out that RV4 and RV5 itself is again the part of the common mode protective circuit on the zero line.
Because each branch road of (Fig. 4) common mode protective circuit and differential mode protective circuit all is in series by two piezo-resistances and just forms complete branch road in this example, so piezo-resistance continuous operating voltage value need reduce, such as being 275V; Piezo-resistance continuous operating voltage value in embodiment one, two then is higher relatively 385V or 460V.
The benefit of present embodiment is that the quantity of piezo-resistance has reduced (comparing with embodiment one, two), and still keeps the common mode protective circuit to be on the different loops with the differential mode protective circuit.So, can reduce the cost of equipment, reduce the volume of equipment.
Above-mentioned physical circuit is embodiments of the invention; those skilled in the art may make some flexible or replace execution modes on the basis of the present invention's design; still belong to the scope of protection of the invention; for example: fuse can change thermistor, temperature control insurance, protective tube or other over-current protection devices or the like into, and piezo-resistance can adopt a plurality of shuntings in parallel and redundancy backup.
Claims (7)
1, a kind of communication equipment three-phase alternating current lightning protection device comprises:
Be connected in the over-current protection device on the phase line (L1, L2, L3) respectively;
Be connected in the lightning protection alarm indicating device between phase line (L1, L2, L3) and the zero line (N) respectively;
It is characterized in that also comprising:
The differential mode protective circuit comprises the first group of piezo-resistance that is connected in respectively between phase line (L1, L2, L3) and the zero line (N); The common mode protective circuit comprises the second group of piezo-resistance that is connected in respectively between phase line (L1, L2, L3), zero line (N) and the node (B), and is connected in the gas discharge tube (GAP1) between node (B) and the ground wire (PE); Described node (B) is meant holding of gas discharge tube (GAP1) far awayly.
2, communication equipment three-phase alternating current lightning protection device as claimed in claim 1, it is characterized in that: described first group of piezo-resistance and second group of shared first to fourth piezo-resistance of piezo-resistance, described first to the 3rd piezo-resistance is connected in respectively between described phase line (L1, L2, L3) and the common point (A), and the 4th piezo-resistance is connected between common point (A) and the zero line; Described second group of piezo-resistance also comprises the 5th piezo-resistance (RV5), and the 5th piezo-resistance (RV5) is connected between common point (A) and the node (B), and described common point is meant the common ends of first to fourth shared piezo-resistance.
3, communication equipment three-phase alternating current lightning protection device as claimed in claim 2, it is characterized in that: the continuous operating voltage value of described first to the 5th piezo-resistance is 275V.
4, communication equipment three-phase alternating current lightning protection device as claimed in claim 1; it is characterized in that: described differential mode protective circuit and common mode protective circuit are separately independently; that is: first group of piezo-resistance comprises the 6th to the 8th piezo-resistance that is connected in respectively between phase line (L1, L2, L3) and the zero line (N), and second group of piezo-resistance comprises the 9th to the 12 piezo-resistance that is connected in respectively between phase line (L1, L2, L3), zero line (N) and the node (B).
5, communication equipment three-phase alternating current lightning protection device as claimed in claim 4, it is characterized in that: described differential mode protective circuit and common mode protective circuit are positioned at the same side of described over-current protection device.
6, communication equipment three-phase alternating current lightning protection device as claimed in claim 4, it is characterized in that: described differential mode protective circuit and common mode protective circuit lay respectively at the both sides of described over-current protection device.
7, as claim 4 or 5 or 6 described communication equipment three-phase alternating current lightning protection devices, it is characterized in that: the continuous operating voltage value of described the 6th to the 12 piezo-resistance is 385V or 460V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100403210A CN100459359C (en) | 2004-07-22 | 2004-07-22 | Three-phase AC shockproof device for communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100403210A CN100459359C (en) | 2004-07-22 | 2004-07-22 | Three-phase AC shockproof device for communication equipment |
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| Publication Number | Publication Date |
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| CN1599185A true CN1599185A (en) | 2005-03-23 |
| CN100459359C CN100459359C (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100403210A Active CN100459359C (en) | 2004-07-22 | 2004-07-22 | Three-phase AC shockproof device for communication equipment |
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| CN (1) | CN100459359C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577004A (en) * | 2009-08-27 | 2012-07-11 | 洋马株式会社 | Surge protection circuit in three-phase four-wire system circuit |
| CN102593815A (en) * | 2012-03-02 | 2012-07-18 | 深圳麦格米特电气股份有限公司 | Lightning protection circuit at input terminal of inverter welding equipment |
| CN103199516A (en) * | 2013-03-20 | 2013-07-10 | 华为技术有限公司 | Alternating current protection circuit and system lightning-protection circuit |
| CN105958463A (en) * | 2016-06-22 | 2016-09-21 | 杭州能鸿电子科技有限公司 | Single-chip microcomputer-based lightning protection online detection integrated box and lightning protection detection method thereof |
| CN106487208A (en) * | 2016-11-28 | 2017-03-08 | 阳光电源股份有限公司 | A kind of inverter ac cable suppressing method of common-mode voltage and device over the ground |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2376112Y (en) * | 1998-07-21 | 2000-04-26 | 深圳市华为电气股份有限公司 | Lightning protection device |
| US6282073B1 (en) * | 1998-12-22 | 2001-08-28 | Act Communications, Inc. | Environmentally insensitive surge suppressor apparatus and method |
| TW467389U (en) * | 2000-10-26 | 2001-12-01 | Jonie Chou | Circuit to display the abnormality of three-phase surge absorber of utility power and multi-terminal fuse |
| CN1162949C (en) * | 2000-12-19 | 2004-08-18 | 中兴通讯股份有限公司 | Single power supply unit with lightning protector |
| CN1177397C (en) * | 2001-09-21 | 2004-11-24 | 艾默生网络能源有限公司 | Lightning protector for low voltage electric equipment |
| CN1146096C (en) * | 2001-12-05 | 2004-04-14 | 沈艺明 | Lightning protection for power supply |
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2004
- 2004-07-22 CN CNB2004100403210A patent/CN100459359C/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102577004A (en) * | 2009-08-27 | 2012-07-11 | 洋马株式会社 | Surge protection circuit in three-phase four-wire system circuit |
| CN102577004B (en) * | 2009-08-27 | 2014-12-24 | 洋马株式会社 | Surge protection circuit in three-phase four-wire system circuit |
| CN102593815A (en) * | 2012-03-02 | 2012-07-18 | 深圳麦格米特电气股份有限公司 | Lightning protection circuit at input terminal of inverter welding equipment |
| CN103199516A (en) * | 2013-03-20 | 2013-07-10 | 华为技术有限公司 | Alternating current protection circuit and system lightning-protection circuit |
| CN103199516B (en) * | 2013-03-20 | 2016-01-27 | 华为技术有限公司 | A kind of interchange protection circuit and system thunder defending circuit |
| CN105958463A (en) * | 2016-06-22 | 2016-09-21 | 杭州能鸿电子科技有限公司 | Single-chip microcomputer-based lightning protection online detection integrated box and lightning protection detection method thereof |
| CN105958463B (en) * | 2016-06-22 | 2018-05-29 | 杭州能鸿电子科技有限公司 | Single-chip microcomputer-based lightning protection online detection integrated box and lightning protection detection method thereof |
| CN106487208A (en) * | 2016-11-28 | 2017-03-08 | 阳光电源股份有限公司 | A kind of inverter ac cable suppressing method of common-mode voltage and device over the ground |
| CN106487208B (en) * | 2016-11-28 | 2018-12-28 | 阳光电源股份有限公司 | The suppressing method and device of a kind of inverter ac cable common-mode voltage over the ground |
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| Publication number | Publication date |
|---|---|
| CN100459359C (en) | 2009-02-04 |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
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