WO2004102594A2 - Method and testing equipment for checking the operation of a lightning arrester - Google Patents
Method and testing equipment for checking the operation of a lightning arrester Download PDFInfo
- Publication number
- WO2004102594A2 WO2004102594A2 PCT/PL2004/000036 PL2004000036W WO2004102594A2 WO 2004102594 A2 WO2004102594 A2 WO 2004102594A2 PL 2004000036 W PL2004000036 W PL 2004000036W WO 2004102594 A2 WO2004102594 A2 WO 2004102594A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lightning
- head
- arrester
- inspection
- unit
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1236—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of surge arresters
Definitions
- the object of this invention is the method and a set of testing equipment for the assessment of electric parameters of lightning protection systems.
- the lightning protection of building structures is realized by means of conventional systems consisting of electric conductor laid on the outlines of the protected facility and earthed metal spike, or by means of lightning arresters provided with active heads seated on a pipe mast.
- the purpose of those heads is to accelerate the creation of bottom-up channel with ionized air to enable the extension of protected area compared to conventional protective system.
- the commonly known method of assessment of technical efficiency of a lightning protection system consists in external visual inspection, usually with the use of field-glasses.
- This method permits only a general determination of the scope of any mechanical damage to active head and, when it is impossible to make a specific determination, a verification of the state of damage and head suitability for further use may only be possible after it is dismounted from mast and checked on a test stand, and is usually performed by manufacturer of such systems.
- performing such inspection is very cumbersome and expensive, especially in the case of lightning arrester installed on church tower, tank or mast which, as a rule, are difficult to access.
- the purpose of this invention is to develop a method and equipment for periodic evaluation of the efficiency of the lightning systems, especially those with active heads, or evaluation of a system right after lightning stroke.
- the essence of the method of conducting the evaluation of electric parameters of lightning protection system, in particular its head, of the invention consist in that at least one inspection wire, connected electrically to tester unit, is additionally mounted to lightning arrester head, equipped with grounding conductor, then the testing arrangement of the unit is activated by applying low control voltage between earthing conductor and inspection wire, or between inspection wires only, to control the electric energy stored in the set of capacitors and supplied to permanent contacts of those conductor wires, connected also to the tested elements of lightning-arrester head, and then the information obtained on the electrical parameters of the conductors is transmitted by these conductors to the testing unit, either mounted directly to lightning arrester head or located at some further distance from the head and coupled electrically to its earthing conductor and to inspection wire.
- the measurement of technical and service parameters of the lightning-arrester head is carried out only when the tester unit is in the state of electrical conducting.
- the measurement of technical and service parameters of the lightning-arrester head is also carried out after coupling the tester unit with current measuring element in the earthing conductor and, on the basis of this information, an automatic assessment of these parameters is performed.
- the set of testing equipment for the assessment of electric parameters of lightning protection systems of this invention consists characteristically of tester unit provided with a probe and a socket, installed in lightning-arrester head, containing a connector with earthing conductor of the lightning protection system and with inspection wire, whereas the tester unit has a set of capacitors that store electric energy and are electrically connected with the inspection wire and with electro-mechanical system provided with moving element with measuring contacts opposing fixed contacts of these conducting wires electrically connected with tested elements of the lightning-arrester head.
- the tester unit does not conduct electric current while during testing of the lightning protection system it is in a state of electric current conducting, whereas the system has at least one inspection wire going outward from it.
- the connector socket is mounted on, or in, the mast of lightning-arrester head and two or more inspection wires are connected to the set of capacitors.
- the tester unit probe is located in the socket of the connector of earthing conductor and inspection wire, while measuring contacts of this unit are located in its fixed contacts.
- the electromagnetic system consists of electro-magnet or electric motor and, during testing of lightning-arrester head elements, the electromagnetic system is supplied from outside through inspection wire and earthing conductor or through inspection wires only.
- the basic advantage of the method and equipment unit of this invention is the possibility to perform a remote testing of lightning-arrester head without the need for direct intervention on the head.
- the testing unit may be installed fixed to lightning protection system and testing may performed periodically, or directly after a lightning stroke, and the relevant information may be transmitted for as up to 1000 meter.
- Fig. 1 presents the block diagram of the unit for testing electric parameters of lightning arrester head, electrically coupled with this head and
- Fig. 2 is a diagram of protected facility equipped with lightning protection system.
- a set of tester equipment consists of tester unit 1 equipped with probe 2 and socket 3 mounted in lightning arrester head 4, containing a connector with earthing conductor 5 and inspection wire 6.
- Said tester unit I consists of set of capacitors 7 that store electric energy and are electrically connected with the inspection wire 6 and with electro-mechanical system 8, provided with moving element 9 with measuring contacts H) opposing fixed contacts jj, of the earthing conductor 4 and inspection wire 6 electrically connected with tested elements 12 of the lightning-arrester head 4, for example with its electrical coil, spark gap and its other elements.
- a set of testing equipment is equipped with several inspection wires 6, the electro-mechanical system 8 has electric motor or mechanical tension member and is supplied from
- the reading of checked parameters of lightning arrester head 4 is done with the use of tester unit I mounted permanently to the head or with a mobile tester unit.
Abstract
Method for performing the evaluation of electrical parameters of lightning protection system, in particular the lightning-arrester head (4), wherein at least one inspection wire (6), connected electrically to tester unit (1), is additionally mounted to lightning arrester head (4) equipped with earthing conductor (5), then the testing arrangement of the unit is activated by applying low control voltage between inspection wire (6) and earthing conductor (5) or between inspection wires (6) only, to control the electric energy stored in the set of capacitors (7) and supplied to permanent contacts (11) of those conductor wires, connected also to the tested elements (12) of lightning-arrester head (4), and then the information obtained on the electrical parameters of the conductors is transmitted by these conductors to the tester unit (1) either mounted directly to lightning arrester head (4) or located at some further distance from the head and coupled electrically to its earthing conductor (5) and with inspection wire (6). The essence of the testing equipment for the evaluation of electrical parameters of lightning protection system, in particular the lightning-arrester head (4), is in its consisting of tester unit (1) provided with probe (2) and socket (3) installed in lightning-arrester head (4) and containing connector with earthing conductor (5) of the lightning protection system and with inspection wire (6), whereas the testing unit (1) has a set of capacitors (7) that store electric energy and are electrically connected with inspection wire (6) and with electromechanical system (8) provided with moving element (9) with measuring contacts (10) opposing fixed contacts (11) of conductor wires (5) and (6) connected electrically with tested elements (12) of said lightning-arrester head (4).
Description
Method and set of testing equipment for assessment of electric parameters of lightning protection systems
The object of this invention is the method and a set of testing equipment for the assessment of electric parameters of lightning protection systems.
The lightning protection of building structures is realized by means of conventional systems consisting of electric conductor laid on the outlines of the protected facility and earthed metal spike, or by means of lightning arresters provided with active heads seated on a pipe mast. The purpose of those heads is to accelerate the creation of bottom-up channel with ionized air to enable the extension of protected area compared to conventional protective system. The commonly known method of assessment of technical efficiency of a lightning protection system consists in external visual inspection, usually with the use of field-glasses. This method permits only a general determination of the scope of any mechanical damage to active head and, when it is impossible to make a specific determination, a verification of the state of damage and head suitability for further use may only be possible after it is dismounted from mast and checked on a test stand, and is usually performed by manufacturer of such systems.
Also known are mobile units permitting a check of a lightning protection system upon previous dismounting of active head or by applying a suitable probe to head spike. However, performing such inspection is very cumbersome and expensive, especially in the case of lightning arrester installed on church tower, tank or mast which, as a rule, are difficult to access.
The purpose of this invention is to develop a method and equipment for periodic evaluation of the efficiency of the lightning systems, especially those with active heads, or evaluation of a system right after lightning stroke.
The essence of the method of conducting the evaluation of electric parameters of lightning protection system, in particular its head, of the invention, consist in that at least one inspection wire, connected electrically to tester unit, is additionally mounted to lightning arrester head, equipped with grounding conductor, then the testing arrangement of the unit is activated by applying low control voltage between earthing conductor and inspection wire, or between inspection wires only, to control the electric energy stored in the set of capacitors and supplied to permanent contacts of those conductor wires, connected also to the tested elements of lightning-arrester head, and then the information obtained on the electrical parameters of the conductors is transmitted by these conductors to the testing unit, either mounted directly to lightning arrester head or located at some further distance from the head and coupled electrically to its earthing conductor and to inspection wire. The measurement of technical and service parameters of the lightning-arrester head is carried out only when the tester unit is in the state of electrical conducting. The measurement of technical and service parameters of the lightning-arrester
head is also carried out after coupling the tester unit with current measuring element in the earthing conductor and, on the basis of this information, an automatic assessment of these parameters is performed. In turn, the set of testing equipment for the assessment of electric parameters of lightning protection systems of this invention consists characteristically of tester unit provided with a probe and a socket, installed in lightning-arrester head, containing a connector with earthing conductor of the lightning protection system and with inspection wire, whereas the tester unit has a set of capacitors that store electric energy and are electrically connected with the inspection wire and with electro-mechanical system provided with moving element with measuring contacts opposing fixed contacts of these conducting wires electrically connected with tested elements of the lightning-arrester head. In a state of normal functioning of lightning protection system the tester unit does not conduct electric current while during testing of the lightning protection system it is in a state of electric current conducting, whereas the system has at least one inspection wire going outward from it. Preferably, the connector socket is mounted on, or in, the mast of lightning-arrester head and two or more inspection wires are connected to the set of capacitors. During testing of lightning-arrester head elements the tester unit probe is located in the socket of the connector of earthing conductor and inspection wire, while measuring contacts of this unit are located in its fixed contacts. Also, preferably, the electromagnetic system consists of electro-magnet or electric motor and, during testing of lightning-arrester head elements, the electromagnetic system is supplied from outside through inspection wire and earthing conductor or through inspection wires only.
The basic advantage of the method and equipment unit of this invention is the possibility to perform a remote testing of lightning-arrester head without the need for direct intervention on the head. The testing unit may be installed fixed to lightning protection system and testing may performed periodically, or directly after a lightning stroke, and the relevant information may be transmitted for as up to 1000 meter.
The object of the invention is presented in examples of its embodiment in the drawing, where Fig. 1 presents the block diagram of the unit for testing electric parameters of lightning arrester head, electrically coupled with this head and, Fig. 2 is a diagram of protected facility equipped with lightning protection system.
A set of tester equipment consists of tester unit 1 equipped with probe 2 and socket 3 mounted in lightning arrester head 4, containing a connector with earthing conductor 5 and inspection wire 6. Said tester unit I consists of set of capacitors 7 that store electric energy and are electrically connected with the inspection wire 6 and with electro-mechanical system 8, provided with moving element 9 with measuring contacts H) opposing fixed contacts jj, of the earthing conductor 4 and inspection wire 6 electrically connected with tested elements 12 of the lightning-arrester head 4, for example with its electrical coil, spark gap and its other elements.
In other examples of embodiment not shown in the drawing, a set of testing equipment is equipped with several inspection wires 6, the electro-mechanical system 8 has electric motor or mechanical tension member and is supplied from
90 external unit through two or more inspection wires 6, whereas the socket 3 of the connector of conductors 5 and 6 is installed in, or on, mast 13.
The method of testing of lightning arrester head 4, installed on pipe mast 13 earthed with conductor 5 located on protected facility .14, wherein at least one inspection wire 6 is/are additionally mounted to lightning arrester head 4 and
95 connected, together with said earthing conductor 5 to lightning protection system through socket 3 and probe 2 to its tester unit 1, and then the probe 2 is used to apply low voltage of the range within several to few scores of volts between these conductors/wires. Applying of low voltage causes activation of tester unit 1 and supplying of electrical energy stored in the set of capacitors 7
100 to electro-mechanical system 8, which causes a shift of the movable element 9 with the measuring contacts 10 towards fixed contacts lj_ electrically connected with tested elements 12 of lightning arrester head 4.
Once the contacts 10 and H are connected, the information on actual electrical parameters 12 of elements 12 of the lightning arrester head 4 is
105 transmitted through set of capacitors 7 along inspection wire 6 and earthing conductor 5 to memory and to display of tester unit 1, where a reading of test results is taken. Once the testing is finished the moving measuring contacts 10 return to the non-conducting initial position of the unit. The conducting and non-conducting states of the tester unit I is realized only by connecting and
110 disconnecting the measuring contacts _10 of the unit to or from the fixed contacts JT connected with tested elements 12.
The reading of checked parameters of lightning arrester head 4 is done with the use of tester unit I mounted permanently to the head or with a mobile tester unit.
Claims
1. Method for performing the evaluation of electrical parameters of lightning protection system, in particular its head, wherein at least one inspection wire (6), connected electrically to tester unit (I), is additionally mounted to lightning arrester head (4) equipped with earthing conductor (5), then the
5 testing arrangement of the unit is activated by applying low control voltage between inspection wire (6) and earthing conductor (5) or between inspection wires (6) only, to control the electric energy stored in the set of capacitors (7) and supplied to permanent contacts (11 of those conductor wires, connected also to the tested elements (12) of lightning-arrester head (4), and then the
10 information obtained on the electrical parameters of the conductors is transmitted by these conductors to the tester unit (1) either mounted directly to lightning arrester head (4) or located at some further distance from the head and coupled electrically to its earthing conductor (5) and with inspection wire
(6). 15 2. The method according to claim 1, wherein the measurement of technical and service parameters of lightning-arrester head (4) is taken only when the tester unit (1) is conducting electric current.
3. The method according to claim 1 or 2, wherein the measurement of technical and service parameters of lightning-arrester head (4) is taken after
20 tester unit (1) is coupled with electric current measuring element in the earthing conductor (5) and, automatic assessment of those parameters is performed on the basis of this information.
4. Set of testing equipment for performing the assessment of electric parameters of lightning protection system, especially its head, consisting of
25 tester unit (1) provided with probe (2) and socket (3) installed in lightning- arrester head (4) and containing a connector with earthing conductor (5) of the lightning protection system and with inspection wire (6), whereas the testing unit (1) has a set of capacitors (7) that store electric energy and are electrically connected with inspection wire (6) and with electro-mechanical
30 system (8) provided with moving element (9) with measuring contacts (10) opposing fixed contacts (11) of conductor wires (5) and (6) connected electrically with tested elements (12) of the lightning-arrester head (4).
5. Set of equipment according to claim 4, wherein, in a state of normal functioning of lightning protection system, the tester unit (V) does not conduct
35 electric current while during testing of the lightning protection system it is in a state of electric current conducting.
6. Set of equipment according the claim 4, wherein the socket (3) is installed on or in the mast (13) of lightning-arrester head (4).
7. Set of equipment according to claim 4, wherein two or more inspection 0 wires (6) are connected to the set of capacitors (7).
8. Set of equipment according to claim 4, wherein the probe (2) of the tester unit (1 ) is located in socket (3) of the connector of conducting wires (5) and (6), while the measuring contacts (10) of the unit are located in its fixed contacts (11) during testing of elements of lightning-arrester head (4). Set of equipment according to claim 4, wherein the electro-mechanical system (8) consists of electromagnet.
9. Set of equipment according to claim 4 or 9, wherein the electromechanical system (8) consists of electric motor.
10. Set of equipment according to claim 4, wherein the electro-mechanical system (8) is supplied f om outside through inspection wire (6) and earthing
11. conductor (5) during testing of elements (12).
Set of equipment according to claim 4 or 11, wherein the electromechanical system (8) is supplied from outside through two or more
12. inspection wires (6) during testing of elements of lightning-arrester head (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04733504A EP1625410A2 (en) | 2003-05-19 | 2004-05-17 | Method and testing equipment for checking the operation of a lightning arrester |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL360217A PL201126B1 (en) | 2003-05-19 | 2003-05-19 | Method and set of test instruments designed for evaluation of electric parameters of lightning arrester systems |
| PLP-360217 | 2003-05-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2004102594A2 true WO2004102594A2 (en) | 2004-11-25 |
| WO2004102594A3 WO2004102594A3 (en) | 2005-06-02 |
| WO2004102594B1 WO2004102594B1 (en) | 2005-08-25 |
Family
ID=33448592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/PL2004/000036 WO2004102594A2 (en) | 2003-05-19 | 2004-05-17 | Method and testing equipment for checking the operation of a lightning arrester |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1625410A2 (en) |
| CN (1) | CN100501431C (en) |
| PL (1) | PL201126B1 (en) |
| RU (1) | RU2334239C2 (en) |
| WO (1) | WO2004102594A2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2418204A1 (en) * | 2013-05-30 | 2013-08-12 | Aplicaciones Tecnologicas, S.A. | Testing method and apparatus for a lightning arrester |
| CN103293451A (en) * | 2013-05-24 | 2013-09-11 | 华南理工大学 | Method of estimating lightning protection of high-voltage transmission line pole/tower earthing device |
| WO2014048340A1 (en) * | 2012-09-27 | 2014-04-03 | 国家电网公司 | Device for testing response characteristic of metal oxide sample under steep-front pulse |
| CN109636238A (en) * | 2018-12-28 | 2019-04-16 | 国网河北省电力有限公司经济技术研究院 | Overhead transmission line lightning protection efficiency evaluation method and device |
| GR1009755B (en) * | 2019-10-14 | 2020-05-29 | Παναγιωτης Βασιλειου Πιττας | A multi tester for the control of multiple operational indications in lighting rods |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7468505B2 (en) * | 2006-07-21 | 2008-12-23 | General Electric Company | Fiber optic current sensor system and method for detecting lightning |
| CN1904627B (en) * | 2006-08-04 | 2011-05-18 | 太原理工大学 | Lightning protector and detection instrument of device and its detection method |
| RU2452968C1 (en) * | 2011-03-01 | 2012-06-10 | Юрий Михайлович Силаев | Measurement method of voltages on earthing device |
| CN106099649B (en) * | 2016-02-19 | 2018-02-06 | 广东立信防雷科技有限公司 | A kind of internet lightning rod and its method of testing |
| RU2629370C1 (en) * | 2016-03-23 | 2017-08-29 | Публичное акционерное общество "Транснефть" (ПАО "Транснефть") | Method of determining general lightning protection zone for cable and core lightning-rod in oil and petroleum reservoirs |
| CN109613353A (en) * | 2018-11-26 | 2019-04-12 | 国网天津市电力公司 | A kind of 35kV and following arrester safety detecting method |
| CN109448942B (en) * | 2018-12-13 | 2024-03-12 | 合肥金瑞配网电气设备有限公司 | Lightning arrester with voltage monitoring interface |
| CN109521343B (en) * | 2018-12-29 | 2020-11-10 | 广东电网有限责任公司 | Method for evaluating lightning-induced tower protection range |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4075549A (en) * | 1976-06-01 | 1978-02-21 | Gw Electronics, Inc. | Apparatus and method for testing electrical surge arresters |
| EP0019884A1 (en) * | 1979-05-23 | 1980-12-10 | Fuji Electric Co. Ltd. | Circuit arrangement for supervising the operational characteristics of an excess voltage arrester without spark gap |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2942030B2 (en) * | 1991-09-30 | 1999-08-30 | 日本碍子株式会社 | Deterioration detector for lightning arrester |
| JPH05205849A (en) * | 1992-01-24 | 1993-08-13 | Mitsubishi Electric Corp | Testing method for lightning arrester |
| JPH0980113A (en) * | 1995-09-14 | 1997-03-28 | Nissin Electric Co Ltd | Apparatus for measuring induced voltage |
-
2003
- 2003-05-19 PL PL360217A patent/PL201126B1/en unknown
-
2004
- 2004-05-17 CN CNB200480000500XA patent/CN100501431C/en not_active Expired - Fee Related
- 2004-05-17 WO PCT/PL2004/000036 patent/WO2004102594A2/en active Application Filing
- 2004-05-17 RU RU2005136861/28A patent/RU2334239C2/en not_active IP Right Cessation
- 2004-05-17 EP EP04733504A patent/EP1625410A2/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4075549A (en) * | 1976-06-01 | 1978-02-21 | Gw Electronics, Inc. | Apparatus and method for testing electrical surge arresters |
| EP0019884A1 (en) * | 1979-05-23 | 1980-12-10 | Fuji Electric Co. Ltd. | Circuit arrangement for supervising the operational characteristics of an excess voltage arrester without spark gap |
Non-Patent Citations (3)
| Title |
|---|
| HADDAD A ET AL: "AN IMPROVED NON-INDUCTIVE IMPULSE VOLTAGE MEASUREMENT TECHNIQUE FORZNO SURGE ARRESTERS" IEEE TRANSACTIONS ON POWER DELIVERY, IEEE INC. NEW YORK, US, vol. 10, no. 2, 1 April 1995 (1995-04-01), pages 778-785, XP000539104 ISSN: 0885-8977 * |
| PATENT ABSTRACTS OF JAPAN vol. 0174, no. 25 (P-1587), 6 August 1993 (1993-08-06) & JP 5 087866 A (NGK INSULATORS LTD), 6 April 1993 (1993-04-06) * |
| PATENT ABSTRACTS OF JAPAN vol. 0176, no. 36 (E-1464), 25 November 1993 (1993-11-25) & JP 5 205849 A (MITSUBISHI ELECTRIC CORP), 13 August 1993 (1993-08-13) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014048340A1 (en) * | 2012-09-27 | 2014-04-03 | 国家电网公司 | Device for testing response characteristic of metal oxide sample under steep-front pulse |
| CN103293451A (en) * | 2013-05-24 | 2013-09-11 | 华南理工大学 | Method of estimating lightning protection of high-voltage transmission line pole/tower earthing device |
| CN103293451B (en) * | 2013-05-24 | 2015-10-28 | 华南理工大学 | A kind of appraisal procedure of high-voltage transmission line pole tower earthing device lightning protection characteristic |
| ES2418204A1 (en) * | 2013-05-30 | 2013-08-12 | Aplicaciones Tecnologicas, S.A. | Testing method and apparatus for a lightning arrester |
| CN109636238A (en) * | 2018-12-28 | 2019-04-16 | 国网河北省电力有限公司经济技术研究院 | Overhead transmission line lightning protection efficiency evaluation method and device |
| GR1009755B (en) * | 2019-10-14 | 2020-05-29 | Παναγιωτης Βασιλειου Πιττας | A multi tester for the control of multiple operational indications in lighting rods |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004102594B1 (en) | 2005-08-25 |
| WO2004102594A3 (en) | 2005-06-02 |
| RU2334239C2 (en) | 2008-09-20 |
| PL360217A1 (en) | 2004-11-29 |
| CN100501431C (en) | 2009-06-17 |
| RU2005136861A (en) | 2006-05-27 |
| EP1625410A2 (en) | 2006-02-15 |
| CN1717588A (en) | 2006-01-04 |
| PL201126B1 (en) | 2009-03-31 |
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