KR20080084147A - Surge protection device for large capacity power supply - Google Patents

Surge protection device for large capacity power supply Download PDF

Info

Publication number
KR20080084147A
KR20080084147A KR1020070025448A KR20070025448A KR20080084147A KR 20080084147 A KR20080084147 A KR 20080084147A KR 1020070025448 A KR1020070025448 A KR 1020070025448A KR 20070025448 A KR20070025448 A KR 20070025448A KR 20080084147 A KR20080084147 A KR 20080084147A
Authority
KR
South Korea
Prior art keywords
surge
varistor
capacity
fuse
protection device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
KR1020070025448A
Other languages
Korean (ko)
Inventor
엄주홍
Original Assignee
(재) 기초전력연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (재) 기초전력연구원 filed Critical (재) 기초전력연구원
Priority to KR1020070025448A priority Critical patent/KR20080084147A/en
Publication of KR20080084147A publication Critical patent/KR20080084147A/en
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/048—Fuse resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/044—Physical layout, materials not provided for elsewhere
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/048—Fuse resistors
    • H01H2085/0486—Fuse resistors with voltage dependent resistor, e.g. varistor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

본 발명은 다수의 서지보호기로 이루어져 전원라인 사이에 병렬 연결되는 서지보호장치에 있어서, 서지보호기는 일단이 전원라인의 모선에 연결되는 배리스터와 배리스터의 타단과 전원라인의 접지선 사이에 연결되는 서지 퓨즈를 포함한다.The present invention is a surge protection device consisting of a plurality of surge protector connected in parallel between the power line, the surge protector is a surge fuse is connected between the varistor and the other end of the varistor and the ground line of the power line, one end is connected to the bus line of the power line It includes.

상기와 같은 본 발명에 따르면, 배리스터와 서지 퓨즈로 이루어진 서지보호기를 전원라인 사이에 다수 개로 병렬 연결함으로써, 단락고장이 발생한 배리스터를 분리시켜 서지 보호특성과 안전성능을 향상시킬 수 있는 효과가 있다.According to the present invention as described above, by connecting a plurality of surge protector consisting of a varistor and a surge fuse in parallel between the power supply line, it is possible to separate the varistor having a short circuit failure to improve the surge protection characteristics and safety performance.

Description

대용량 전원용 서지보호장치{Appratus for protecting surge for large capacity power}Apparatus for protecting surge for large capacity power

도 1은 종래기술의 서지보호기를 나타낸 도면. 1 shows a surge protector of the prior art;

도 2는 본 발명의 일실시예에 따른 대용량 전원용 서지보호장치에 관한 개략적인 구조를 나타내는 도면.2 is a view showing a schematic structure of a surge protection device for a large-capacity power supply according to an embodiment of the present invention.

도 3은 본 발명의 일실시예에 따른 대용량 전원용 서지보호장치에 대한 서지전류의 응답특성을 나타낸 도면.Figure 3 is a view showing the response characteristics of the surge current for the surge protection device for a large-capacity power supply according to an embodiment of the present invention.

도 4는 본 발명의 일실시예에 따른 대용량 전원용 서지보호장치에 대한 어느 하나의 배리스터 단락고장 시 응답특성을 나타낸 도면.Figure 4 is a view showing the response characteristics of any one varistor short circuit failure for the surge protection device for a large-capacity power supply according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for main parts of the drawings>

1 : 단일 배리스터 소자 2 : 단일 서지 퓨즈1: single varistor element 2: single surge fuse

100 : 서지보호장치 110 : 서지보호기100: surge protector 110: surge protector

112 : 배리스터 114 : 서지 퓨즈112: varistor 114: surge fuse

116 : 단락고장된 배리스터 118 : 용단된 서지 퓨즈116: short-circuit varistor 118: blown surge fuse

본 발명은 대용량 전원용 서지보호장치에 관한 것으로서, 특히, 낙뢰 등으로 인하여 회로에 유입되는 서지(surge)전압 및 서지전류로부터 단락고장을 차단하는 대용량 전원용 서지보호장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surge protection device for a large capacity power supply, and more particularly, to a surge protection device for a large capacity power supply that blocks a short circuit failure from surge voltage and surge current introduced into a circuit due to a lightning strike.

종래의 서지보호기는, 도 1에 도시된 바와 같이 단일 배리스터 소자(1)에 단일 서지퓨즈(2)를 장착하여 사용하고 있다. 그러나, 무인기지국 등지의 전원용 서지보호기로 사용할 경우, 서지에 의한 고장시 보호동작을 할 수 없기 때문에, 고장 후 수리까지 보호동작의 공백기가 발생하는 문제점이 있다.A conventional surge protector is used by mounting a single surge fuse 2 to a single varistor element 1 as shown in FIG. However, when it is used as a surge protector for a power supply of an unmanned base station or the like, since a protective operation cannot be performed when a surge occurs, there is a problem that a gap of the protective operation occurs until repair after failure.

본 발명의 목적은, 배리스터와 서지 퓨즈로 이루어진 서지보호기를 전원라인 사이에 다수 개로 병렬 연결함으로써, 단락고장이 발생한 배리스터를 분리시켜 서지 보호특성과 안전성능을 향상시키는 대용량 전원용 서지보호장치를 제공함에 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a surge protection device for a large-capacity power supply which improves surge protection characteristics and safety performance by separating varistors having a short circuit failure by connecting a plurality of surge protectors composed of a varistor and a surge fuse in parallel between power lines. have.

본 발명에 따른 대용량 전원용 서지보호장치는, 다수의 서지보호기로 이루어져 전원라인 사이에 병렬 연결되는 서지보호장치에 있어서, 서지보호기는 일단이 전원라인의 모선에 연결되는 배리스터와 상기 배리스터의 타단과 전원라인의 접지선 사이에 연결되는 서지 퓨즈를 포함하는 것을 특징으로 한다.In the surge protection device for a large-capacity power supply according to the present invention, a surge protection device comprising a plurality of surge protectors connected in parallel between power lines, the surge protector has a varistor having one end connected to a bus line of the power line and the other end of the varistor and a power source. And a surge fuse connected between the ground lines of the lines.

바람직하게, 배리스터는 금속산화 배리스터인 것을 특징으로 한다.Preferably, the varistor is characterized in that the metal oxide varistor.

그리고 바람직하게, 전원라인으로 유입되는 서지전류의 용량과 상기 서지보호기의 갯수로부터 상기 배리스터의 용량 및 상기 서지 퓨즈의 용량을 산정하는 것 을 특징으로 한다.And preferably, the capacity of the varistor and the capacity of the surge fuse are calculated from the capacity of the surge current flowing into the power line and the number of the surge protectors.

본 발명의 특징 및 이점들은 첨부도면에 의거한 다음의 상세한 설명으로 더욱 명백해질 것이다. 이에 앞서 본 발명에 관련된 공지 기능 및 그 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는, 그 구체적인 설명을 생략하였음에 유의해야 할 것이다.The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. In the meantime, when it is determined that the detailed description of the known functions and configurations related to the present invention may unnecessarily obscure the subject matter of the present invention, it should be noted that the detailed description is omitted.

본 발명의 일실시예에 따른 대용량 전원용 서지보호장치에 관하여 도 2를 참조하여 설명하면 다음과 같다.The surge protection device for a large-capacity power source according to an embodiment of the present invention will be described with reference to FIG. 2.

도 2는 본 발명의 일실시예에 따른 대용량 전원용 서지보호장치에 관한 개략적인 구조를 나타내는 도면이다.2 is a view showing a schematic structure of a surge protection device for a large-capacity power supply according to an embodiment of the present invention.

본 발명의 일실시예에 따른 대용량 전원용 서지보호장치(100)는 도 2에 도시된 바와 같이, 배리스터(112) 및 서지 퓨즈(114)를 포함하는 서지보호기(110)로 구성된다.As shown in FIG. 2, the surge protection device 100 for a large-capacity power source includes a surge protector 110 including a varistor 112 and a surge fuse 114.

배리스터(112)는 금속산화 배리스터(MOV)로서, 전원라인인 모선(L1)과 접지선(N) 사이에 연결되어, 서지전류로부터 회로를 보호하는 기능을 수행한다.Varistor 112 is a metal oxide varistor (MOV), and is connected between the bus line (L1) and the ground line (N) which is a power line, and serves to protect the circuit from surge current.

서지 퓨즈(114)는 배리스터(112)와 접지선(N) 사이에 연결되고, 배리스터의 단락고장 시, 전원회로로부터 분리시켜 단락보호하는 기능을 수행한다. The surge fuse 114 is connected between the varistor 112 and the ground line (N), and when the short circuit failure of the varistor, the surge fuse 114 is separated from the power circuit to perform a function for short-circuit protection.

여기서, 배리스터(112) 및 서지 퓨즈(114)가 직렬로 연결된 서지보호기(110)가 전원라인(L1, N) 사이에 다수 개(n)로 병렬 연결된다. 본 실시예에서 전원라인은 단상 전원라인(L1, N)으로 하였지만, 본 발명이 이에 한정되는 것은 아니다.Here, the surge protector 110, in which the varistor 112 and the surge fuse 114 are connected in series, is connected in parallel with a plurality (n) between the power supply lines (L1, N). In the present embodiment, the power line is a single-phase power line (L1, N), but the present invention is not limited thereto.

서지 퓨즈는 40kA의 서지용량에 견디면서 10~30A 정도의 교류전류에 수초 내로 용단(溶斷)되는 특성을 보유하기가 어렵고, 반대로 15A정도의 고장전류에 의해서 3초 내로 용단이 되더라도 서지전류 용량은 20kA에 이르지 못하는 경우도 있다.Surge fuses cannot withstand the surge capacity of 40kA and have a characteristic of being melted within a few seconds with an alternating current of about 10 to 30A. On the contrary, even if the fuse is melted within 3 seconds by a fault current of about 15A, the surge current capacity May not reach 20 kA.

이러한 서지 퓨즈의 특성은 용단값

Figure 112007020909742-PAT00001
을 고려해서 최대 서지전류 용량을 산정하기 때문이다. 즉, 40kA의 서지전류 용량을 가지려면 용단값
Figure 112007020909742-PAT00002
이 약 20,000
Figure 112007020909742-PAT00003
이 되어야 하지만 이 용량은 약 45A의 전류가 10초 정도 흘러야 되는 용량이다. The characteristics of these surge fuses are melt
Figure 112007020909742-PAT00001
This is because the maximum surge current capacity is calculated in consideration of the That is, to have a surge current capacity of 40 kA, the melting value
Figure 112007020909742-PAT00002
About 20,000
Figure 112007020909742-PAT00003
However, this capacity should be about 45A for 10 seconds.

여기서, 본 발명의 일실시예에 따른 서지전류의 응답특성은 도 3에 도시된 바와 같이 정상동작을 하는 경우, 전체 서지전류가 다수 개(n)로 병렬 연결된 서지보호기(110)에 고르게 분류되어 흐른다. Here, the response characteristic of the surge current according to an embodiment of the present invention is classified evenly in the surge protector 110 connected in parallel with a plurality (n) of the total surge current when the normal operation as shown in FIG. Flow.

이때, 도 4에 도시된 바와 같이, 서지보호기(110)의 배리스터(116)가 단락고장 시, 상용주파 교류 단락전류가 흘러 서지 퓨즈(118)가 용단되더라도 남아있는 서지보호기에 의해 정상적인 보호동작을 하여 안전성능이 향상된다.In this case, as shown in FIG. 4, when the varistor 116 of the surge protector 110 has a short circuit failure, a normal protection operation is performed by the remaining surge protector even when the surge fuse 118 is blown due to the flow of a commercial frequency AC short circuit current. The safety performance is improved.

한편, 본 발명의 일실시예에 따른 배리스터 및 서지 퓨즈의 용량산정을 표 1을 참조하여 설명하면 다음과 같다.On the other hand, the capacity calculation of the varistor and the surge fuse according to an embodiment of the present invention will be described with reference to Table 1.

각각의 서지보호기(110)에 거의 동일한 전류가 분류되므로, 배리스터(112)의 용량은 서지전류 용량을 서지보호기(110)의 개수로 나누어 산정한다.Since almost the same current is classified in each surge protector 110, the capacity of the varistor 112 is calculated by dividing the surge current capacity by the number of surge protectors 110.

그리고, 서지 퓨즈의 용량은 표 1의 서지전류 용량표에서 측정값

Figure 112007020909742-PAT00004
을 선택하고, 해당 용단값
Figure 112007020909742-PAT00005
을 서지보호기(110)의 개수로 나누어 해당하는 용량 을 산정한다.The surge fuse capacity is measured from the surge current capacity table in Table 1.
Figure 112007020909742-PAT00004
Select the corresponding melt value
Figure 112007020909742-PAT00005
Divide by the number of surge protectors 110 to calculate the corresponding capacity.

즉, 본 발명의 일실시예에 따라 서지전류 용량이 40kA이고, 4개의 서지보호기(110)를 전원라인(L1, N) 사이에 연결하기 위해서, 10kA이상의 배리스터 및 20kA 서지전류 용량의 서지 퓨즈를 직렬로 연결한다.That is, according to an embodiment of the present invention, the surge current capacity is 40kA, and in order to connect four surge protectors 110 between the power lines L1 and N, a surge fuse of 10kA or more varistor and 20kA surge current capacity is used. Connect in series.

또한, 서지전류 용량이 80kA이고, 4개의 서지보호기(110)를 전원라인(L1, N) 사이에 연결하기 위해서, 20kA이상의 배리스터 및 40kA 서지전류 용량의 서지 퓨즈를 직렬로 연결한다.In addition, the surge current capacity is 80kA, in order to connect the four surge protectors 110 between the power supply lines (L1, N), a varistor of 20kA or more and a surge fuse of 40kA surge current capacity are connected in series.

Figure 112007020909742-PAT00006
Figure 112007020909742-PAT00006

그리고, 서지전류 용량이 120kA이고, 4개의 서지보호기(110)를 전원라인(L1, N) 사이에 연결하기 위해서, 30kA이상의 배리스터 및 60kA 서지전류 용량의 서지 퓨즈를 직렬로 연결한다.In addition, the surge current capacity is 120kA, and in order to connect four surge protectors 110 between the power lines L1 and N, a varistor of 30kA or more and a surge fuse of 60kA surge current capacity are connected in series.

이상으로 본 발명의 기술적 사상을 예시하기 위한 바람직한 실시예와 관련하여 설명하고 도시하였지만, 본 발명은 이와 같이 도시되고 설명된 그대로의 구성 및 작용에만 국한되는 것이 아니며, 기술적 사상의 범주를 일탈함이 없이 본 발명에 대해 다수의 변경 및 수정이 가능함을 당업자들은 잘 이해할 수 있을 것이다. 따라서, 그러한 모든 적절한 변경 및 수정과 균등물들도 본 발명의 범위에 속하는 것으로 간주되어야 할 것이다.As described above and described with reference to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as described above, it is a deviation from the scope of the technical idea It will be understood by those skilled in the art that many modifications and variations can be made to the invention without departing from the scope of the invention. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

상기와 같은 본 발명에 따르면, 배리스터와 서지 퓨즈로 이루어진 서지보호기를 전원라인 사이에 다수 개로 병렬 연결함으로써, 단락고장이 발생한 배리스터를 분리시켜 서지 보호특성과 안전성능을 향상시킬 수 있는 효과가 있다.According to the present invention as described above, by connecting a plurality of surge protector consisting of a varistor and a surge fuse in parallel between the power supply line, it is possible to separate the varistor having a short circuit failure to improve the surge protection characteristics and safety performance.

Claims (3)

다수의 서지보호기로 이루어져 전원라인 사이에 병렬 연결되는 서지보호장치에 있어서,In the surge protection device consisting of a plurality of surge protector connected in parallel between the power line, 상기 서지보호기는, The surge protector, 일단이 전원라인의 모선에 연결되는 배리스터와 상기 배리스터의 타단과 전원라인의 접지선 사이에 연결되는 서지 퓨즈를 포함하는 것을 특징으로 하는 대용량 전원용 서지보호장치.And a surge fuse having one end connected to a bus bar of a power line and a second fuse connected between the other end of the varistor and a ground line of the power line. 제 1 항에 있어서,The method of claim 1, 상기 배리스터는,The varistor is, 금속산화 배리스터인 것을 특징으로 하는 대용량 전원용 서지보호장치.Surge protection device for large capacity power supply, characterized in that the metal oxide varistor. 제 1 항에 있어서,The method of claim 1, 상기 전원라인으로 유입되는 서지전류의 용량과 상기 서지보호기의 갯수로부터 상기 배리스터의 용량 및 상기 서지 퓨즈의 용량을 산정하는 것을 특징으로 하는 대용량 전원용 서지보호장치.And a capacity of the varistor and a capacity of the surge fuse based on the capacity of the surge current flowing into the power line and the number of the surge protectors.
KR1020070025448A 2007-03-15 2007-03-15 Surge protection device for large capacity power supply Ceased KR20080084147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070025448A KR20080084147A (en) 2007-03-15 2007-03-15 Surge protection device for large capacity power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070025448A KR20080084147A (en) 2007-03-15 2007-03-15 Surge protection device for large capacity power supply

Publications (1)

Publication Number Publication Date
KR20080084147A true KR20080084147A (en) 2008-09-19

Family

ID=40024549

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070025448A Ceased KR20080084147A (en) 2007-03-15 2007-03-15 Surge protection device for large capacity power supply

Country Status (1)

Country Link
KR (1) KR20080084147A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102456996A (en) * 2011-04-12 2012-05-16 厦门赛尔特电子有限公司 Lightning-protecting module for lightning-protecting socket
WO2012064729A3 (en) * 2010-11-08 2012-07-19 Shenzhen Dowin Lightning Technology, Co., Ltd. SURGE PROTECTION DEVICE USING METAL OXIDE VARISTORS (MOVs) AS THE ACTIVE ENERGY CONTROL MULTIPLE GAP DISCHARGING CHAIN
KR20120119594A (en) * 2011-04-22 2012-10-31 김호영 Protection device for electric or electronic operation equipment
KR101529584B1 (en) * 2011-02-08 2015-06-17 엘에스산전 주식회사 Surge protection device with pre-alarm function

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012064729A3 (en) * 2010-11-08 2012-07-19 Shenzhen Dowin Lightning Technology, Co., Ltd. SURGE PROTECTION DEVICE USING METAL OXIDE VARISTORS (MOVs) AS THE ACTIVE ENERGY CONTROL MULTIPLE GAP DISCHARGING CHAIN
US8508326B2 (en) 2010-11-08 2013-08-13 Shenzhen Dowin Lighting Technologies Co., Ltd. Surge protection device using metal oxide varistors (MOVs) as the active energy control multiple gap discharging chain
KR101529584B1 (en) * 2011-02-08 2015-06-17 엘에스산전 주식회사 Surge protection device with pre-alarm function
CN102456996A (en) * 2011-04-12 2012-05-16 厦门赛尔特电子有限公司 Lightning-protecting module for lightning-protecting socket
KR20120119594A (en) * 2011-04-22 2012-10-31 김호영 Protection device for electric or electronic operation equipment

Similar Documents

Publication Publication Date Title
US6930871B2 (en) Lightning arrester device for low-voltage network
US9640951B2 (en) Triggering circuit of overvoltage protection with an asymmetric element
US20030227733A1 (en) Tri-mode over-voltage protection and disconnect circuit apparatus and method
CN101964519A (en) Device for the protection of an electrical installation against voltage surges
TW512563B (en) Lightning arrester device for low-voltage network
CN101170257B (en) Backup protection unit for surge protector
KR20080084147A (en) Surge protection device for large capacity power supply
JP5295635B2 (en) Surge protection device
JP5189892B2 (en) Surge protection device
WO2011070235A1 (en) Electronic protection circuit and protection device
CN106356832A (en) Trigger type compound lightening protector and lightening protection component
JP7032325B2 (en) Configuration for overload protection of overvoltage protection device
US10230233B2 (en) Overvoltage protection device with leakage current cut-off
JP7161669B2 (en) protection circuit
KR101074663B1 (en) 2-way surge protector
JP6936547B1 (en) Current breaker
KR101247274B1 (en) Surge protective device with overcurrent breaking function
KR101212184B1 (en) Surge Protect Device having Selective Switching Function Based Surge Suppression Device
CN109599853A (en) A kind of SPD back-up protection device and matching process based on GDT and NTC
US10672581B2 (en) Type-II overvoltage protection device
Kay et al. Extending the Life of Low Voltage Adjustable Speed Drives
JP2005285717A (en) Circuit protection device
Kay et al. Extending the Life of Low Voltage Adjustable Speed Drives: The Newest Technology to Eliminate Risk
KR100990606B1 (en) Electric cooker
Atkins Power surge protection for telecommunications facilities

Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 20070315

A201 Request for examination
PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 20071130

Comment text: Request for Examination of Application

Patent event code: PA02011R01I

Patent event date: 20070315

Comment text: Patent Application

PG1501 Laying open of application
E902 Notification of reason for refusal
PE0902 Notice of grounds for rejection

Comment text: Notification of reason for refusal

Patent event date: 20090930

Patent event code: PE09021S01D

E601 Decision to refuse application
PE0601 Decision on rejection of patent

Patent event date: 20100427

Comment text: Decision to Refuse Application

Patent event code: PE06012S01D

Patent event date: 20090930

Comment text: Notification of reason for refusal

Patent event code: PE06011S01I