CN1043499C - Low-voltage distribution type lightning-protection module - Google Patents
Low-voltage distribution type lightning-protection module Download PDFInfo
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- CN1043499C CN1043499C CN95112769A CN95112769A CN1043499C CN 1043499 C CN1043499 C CN 1043499C CN 95112769 A CN95112769 A CN 95112769A CN 95112769 A CN95112769 A CN 95112769A CN 1043499 C CN1043499 C CN 1043499C
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- lightning
- zinc
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Abstract
The present invention provides a low-voltage power distribution lightning protection module used for a 220V/380V low-voltage power distribution system. The present invention has the protection level lower than 0.6KV, and conforms to the K20 standard requirement of the CCITT organization. The lightning protection module of the present invention is characterized in that an inductor L is connected in series to a power distribution line, a gas discharge tube GDT or a discharge gap and a zinc oxide voltage sensitive resistor R<z> are respectively connected in parallel to the front of the inductor L, and a capacitor C is connected in parallel to the rear of the inductor L. The present invention has the advantages of high reliability and long service life. Because of the low protection level, the present invention is suitable for communication, computers, broadcasting televisions, railway communication signals and remote control systems to use.
Description
The present invention relates to a kind of low-voltage distribution type lightning-protection module, be applicable to all industry or civilian low-voltage distributing lines, especially be fit to the relevant controller switching equipment use of all kinds of general or special purpose wired and cordless communication network, computer networks.
In recent years, because accidents such as the communication disruption that Lightning Over-voltage causes, computer network paralysis, device damage occur repeatedly, caused great harm to national economy.Wherein: because of the accident that Lightning Over-voltage causes by the low-voltage distributing line equipment of being delivered to is occupied sizable ratio.Investigate its reason, mainly be:
1. owing to the electronic component that all contains work under a large amount of low pressure light current environment in existing communication, the computer equipment,, be not possess the lightning protection condition on the whole although the equipment that has is also considered the anti-interference shielding measure under the industrial environment.
2. because a large amount of uses of communication network and computer network make all kinds of geographical environments communication and computer equipment down realize interconnecting by network, this objectively for the formation and the transmission of Lightning Over-voltage, cause large-scale accident harm that condition is provided.
3. traditional lightning arrester can not satisfy the requirement of system protection levels such as modern communications.At present, the lightning arrester that domestic lightning arrester factory is provided generally all is to be made of Zinc-oxide piezoresistor, owing to limited by production technology and raw material, residual voltage ratio is generally all about 2 at present.With 220 volts of systems is example; index according to " the nominal voltage 0.6KV; protect horizontal 1.3KV " of regulation among the international GB11032-89 " interchange gapless metal-oxide lighting arrester " still can satisfy; but the index as according to " protecting horizontal 1KV " in CCITT tissue " K20 " standard obviously also has gap greatly.In actual use, this class lightning arrester also can't provide enough protection nargin for electronic equipments such as communications.
The objective of the invention is to avoid the weak point that above-mentioned prior art exists and provide a kind of lightning-protection module nominal voltage that makes still by GB requirement 0.8KV; and the protection level is lower than 0.6KV, to guarantee to meet the low-voltage distribution type lightning-protection module of CCITT tissue " K20 " standard-required.
Purpose of the present invention can reach by following measure:
A kind ofly form low-voltage distribution type lightning-protection module, it is characterized in that on distribution line, being in series with inductance L, before inductance L, be parallel with discharge tube GDT or discharging gap and Zinc-oxide piezoresistor R respectively by Zinc-oxide piezoresistor
z, after inductance L, be parallel with capacitor C.
Purpose of the present invention can also reach by following measure:
Two Zinc-oxide piezoresistor R
zSeries connection, discharge tube GDT or discharging gap and Zinc-oxide piezoresistor R wherein
zIn parallel.
At distribution line and Zinc-oxide piezoresistor R
zOr series connection is connected to fuse between the discharge tube GDT, discharging gap.
Fig. 1 is an electrical schematic diagram of the present invention.
Below in conjunction with accompanying drawing the present invention is further described:
Low-voltage distribution type lightning-protection module is by Zinc-oxide piezoresistor R
z, discharge tube GDT, devices such as inductance L and capacitor C are formed.Inductance L of being manufactured by the magnetic ferrites magnetic material of series connection on distribution line, its inductance value is 5 μ H-15 μ H.According to equivalent power supply law, voltage total reflection before the inductance L is about voltage doubles.Like this, when Lightning Over-voltage, make the preceding lightning-arrest device action message of inductance L.Simultaneously, utilize the filter action of inductance L, reduce the amplitude and the steepness of invasion lightning wave.Before inductance L and be connected with lightning arrester spare combination, this combination is made up of two parts, and first is a direct-current discharge voltage 400V-550V, and the discharge tube GDT of discharge capacity 5KA-100KA protects as the first order.Second portion is by two nominal voltage 250V-350V; the Zinc-oxide piezoresistor Rz of discharge capacity 3KA-10KA and a direct-current discharge voltage 250V-400V; the discharge tube GDT of discharge capacity 3KA-5KA forms; two Zinc-oxide piezoresistor Rz series connection are used; and with discharge tube GDT will be wherein a short circuit, protect as the second level.Lightning protection capacitor C in parallel after inductance L further reduces the amplitude of lightning wave, and this capacitor C electric pressure is for exchanging 400V-500V, capacitance 1 μ F-10 μ F.Before distribution line and in parallel lightning arrester combination, be connected in series the fuse FUSE of a 3A-10A, after lightning-arrest combination of devices deterioration, utilize Zinc-oxide piezoresistor R
zLeakage current increase, make fuse failure, break away from thereby lightning-arrest device is combined in the distribution line, and can the outputting alarm signal.
Good reliability of the present invention, long service life, its extremely low protection level are particularly suitable for systems such as communication, computer, radio and television, Source of Railway Communication and Signalling, distant place control and use.
Claims (4)
1. form low-voltage distribution type lightning-protection module by Zinc-oxide piezoresistor for one kind, it is characterized in that on distribution line, being in series with inductance L, before inductance L, be parallel with discharge tube GDT or discharging gap and Zinc-oxide piezoresistor R respectively
z, after inductance L, be parallel with capacitor C.
2. low-voltage distribution type lightning-protection module according to claim 1 is characterized in that two Zinc-oxide piezoresistor R
zSeries connection, discharge tube GDT or discharging gap and Zinc-oxide piezoresistor R wherein
zIn parallel.
3. low-voltage distribution type lightning-protection module according to claim 1 is characterized in that at distribution line and Zinc-oxide piezoresistor R
zOr series connection is connected to fuse between the discharge tube GDT, discharging gap.
4. low-voltage distribution type lightning-protection module according to claim 1 is characterized in that inductance L made by the magnetic ferrites magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112769A CN1043499C (en) | 1995-11-17 | 1995-11-17 | Low-voltage distribution type lightning-protection module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112769A CN1043499C (en) | 1995-11-17 | 1995-11-17 | Low-voltage distribution type lightning-protection module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1151090A CN1151090A (en) | 1997-06-04 |
| CN1043499C true CN1043499C (en) | 1999-05-26 |
Family
ID=5079735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95112769A Expired - Fee Related CN1043499C (en) | 1995-11-17 | 1995-11-17 | Low-voltage distribution type lightning-protection module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043499C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1304786A1 (en) * | 2001-10-18 | 2003-04-23 | ABB Schweiz AG | Voltage limiter |
| JP5445356B2 (en) * | 2010-06-30 | 2014-03-19 | パナソニック株式会社 | Household cooking equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053868A (en) * | 1990-01-30 | 1991-08-14 | 雷伊化学有限公司 | Circuit protection device |
| CN1068449A (en) * | 1991-07-04 | 1993-01-27 | 深圳尤尼-菲斯有限公司 | Zinc oxide piezoresistor and thermal overcurrent protection assembly |
-
1995
- 1995-11-17 CN CN95112769A patent/CN1043499C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053868A (en) * | 1990-01-30 | 1991-08-14 | 雷伊化学有限公司 | Circuit protection device |
| CN1068449A (en) * | 1991-07-04 | 1993-01-27 | 深圳尤尼-菲斯有限公司 | Zinc oxide piezoresistor and thermal overcurrent protection assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151090A (en) | 1997-06-04 |
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| CF01 | Termination of patent right due to non-payment of annual fee |