vùng lpzo lightning protection zone o

... as an important corporate asset and vigorously enforces its patents Products or features contained herein may be covered by one or more U.S or foreign patents An Equal Opportunity Employer 1278364 ... specifications without prior notice At any time, you may verify product specifications by contacting our headquarters office in Minneapolis ADC Telecommunications, Inc views its patent portfolio as ... Lightning Protection Modules P3M – Protector DS3 Modules Ordering Information Dimensions Catalog Number 3.7"x 62" x 3.25" (9.4 x 1.57 x 8.26cm) P3M-PB2001 5-position mounting chassis...

Ngày tải lên: 27/10/2013, 01:15

... interconnected around top perimeter of control tower for connections to down conductors 2–12 Igloos Protection for corrugated steel arch earth-mounted igloos, also called “magazines”, will be provided ... large numbers of troops that provisions of lightning protection is warranted Lightning protection for rifle range support facilities need not be provided b Control tower Complete protection system ... 2-5 Nonreinforced concrete or wood frame buildings Lightning protection will be provided on outside of exterior surfaces without reliance upon components of building for conductors Fasteners for...

Ngày tải lên: 07/11/2013, 06:15

... Creator © Foxit Software http://www.foxitsoftware.com For evaluation only Recommendations for Installation of Lightning Protection Systems on Trees Having established the need for lightning protection ... risk of damage to this tree and building from lightning Soil Conductivity & Lightning Strike Protection When working with soils of poor conductivity it is possible to introduce soil-conditioning ... installations Lightning Protection System Electrodes Generated by Foxit PDF Creator © Foxit Software http://www.foxitsoftware.com For evaluation only Electrodes [used for lightning strike protection] ...

Ngày tải lên: 14/12/2013, 08:15

... Foxit PDF Creator © Foxit Software http://www.foxitsoftware.com For evaluation only relied upon to "contain" or "control" lightning circuit No lightning protection system can be completely (nor ... circuit The roof circuit is composed of a system of copper or aluminum[5] lightning rods and cables on or in the roof of a structure These are arranged to provide a zone of protection around the ... The most common methods for grounding a lightning protection system include ground rods, ground plates, Ufer grounds or a ground ring (counterpoise).[14] In poor grounding conditions such as rocky...

Ngày tải lên: 14/12/2013, 08:15

... non-conducting parts of a structure, such as those made of wood, brick, tile ofconcrete A lightning protection system does not prevent lightning from striking; it provides a means for controlling it and ... transient voltage surge suppressors installed in receptacles to protect computers and other office equipment UL's Role in Lightning Protection: UL's Master Label Program for lightning protection involves ... down conductors; 3) minimum of two groundings at least 10-feet deep; 4) roof projections such as weather vanes connected to system; 5) air terminal located within two feet of outside corners of...

Ngày tải lên: 14/12/2013, 08:15

... to one meter of various conductors Figure 10kA 8/20us impulse applied to various conductors Earthing, Lightning & Surge Protection Forum – IDC Technologies Session Ten: Lightning Protection for ... to the fact that it was going to a tropical country and no thought given to surge protection Earthing, Lightning & Surge Protection Forum – IDC Technologies 10 Session Ten: Lightning Protection ... recommended connection method and the need for overcurrent Earthing, Lightning & Surge Protection Forum – IDC Technologies Session Ten: Lightning Protection for Industrial Plants protection, ...

Ngày tải lên: 20/09/2015, 17:38

... image part with relationship ID rId8 was not found in the file K o trượt để xác định cỡ cho phân vùng b o mật, bạn gõ trực tiếp v o ô Partition size Chú ý phân vùng b o mật bạn t o phải đủ lớn để ... lý Windows System Restore Thiết đặt tùy chọn mặc định chương trình Một số tính khác chương trình Xem b o c o chương trình Created by Nguyễn Hoàng Long raica18186@yahoo.com nguyenhoanglonghd2@gmail.com ... lượng phân vùng b o mật cho đủ (tất nhiên sau file lưu t o nén nhỏ hơn) Cũng đừng t o phân vùng b o mật lớn chiếm nhiều ổ cứng gây lãng phí Sau bạn chuyển lại dung lượng cho phân vùng b o mật, công...

Ngày tải lên: 26/01/2014, 04:20

... due to lightning 12 Type of loss 14 Need for lightning protection 14 Protection measures 15 Basic design criteria 15 Lightning Protection Level (LPL) 16 Lightning Protection Zone (LPZ) 18 Protection ... numerous than flashes to the ground and a ratio of 6:1 or more is thought probable Theory of lightning | Lightning discharges www.furse.com Transient overvoltages (surges) Structural lightning protection ... referred to as Lightning Protection Zones (LPZs) It provides information for the design, installation, maintenance and testing of a Lightning Electromagnetic Impulse (LEMP) protection system for electrical/electronic...

Ngày tải lên: 08/08/2014, 13:21

... identified, corresponding to their equivalent type of loss R1 Risk of loss of human life R2 Risk of loss of service to the public R3 Risk of loss of cultural heritage Protection against lightning ... benefits of providing protection to establish if lightning protection is cost effective This can be assessed by evaluating R4 – risk of loss of economic value R4 is not equated to a tolerable ... consist of an initial short stroke followed by a series of subsequent short strokes (normally of lesser magnitude than the first) or an initial short stroke followed by a combination of long and...

Ngày tải lên: 08/08/2014, 13:21

... (those that are located within another lightning protection zone) fitted as part of a coordinated set to ensure operation of critical equipment should have a voltage protection level of no more ... entrance should sufficiently handle the majority of surge energy, thus leaving the downstream overvoltage SPDs to control the overvoltage Poor coordination could mean that an overvoltage SPD ... protective cable ducts, metallic conduit, or metallic tubes; may not require the use of coordinated SPD protection NOTE Smaller values of PSPD are possible where SPDs have lower voltage protection...

Ngày tải lên: 08/08/2014, 13:21

... Catenary (or suspended) conductors www.furse.com Catenary (or suspended) conductors Meshed conductor network One or more catenary conductors may be utilised to provide a zone of protection over an ... as close to the outer edges of the roof as is practicable Non-conventional air termination systems Down conductor Vertical air termination or strike plate Horizontal conductor Roof pitch Cross ... Application of the protection angle method to catenary conductors forming an isolated system Protection at maximum conductor sag View on arrow A Figure 4.20b: View on arrow A Figure 4.21: Application...

Ngày tải lên: 08/08/2014, 13:21

... dedicated copper conductor from the top of the structure to the foundation prior to the pouring of the concrete This dedicated copper conductor should be bonded to the adjoining/adjacent reinforcing ... is located on rocky soil then the 10 ohm requirement is not applicable Lightning Protection Components (LPC) The correct choice of material, configuration and dimensions of the lightning protection ... particularly onerous The following photographs show a Furse connection component before and after the electrical impulses Poorly designed components would have been thrown from the conductors by the enormous...

Ngày tải lên: 08/08/2014, 13:21

... Devices Zoned protection concept Protection against LEMP is based on a concept of the Lightning Protection Zone (LPZ) that divides the structure in question into a number of zones according to the ... attention should be paid to evidence of corrosion or conditions likely to lead to corrosion problems The LPS should be maintained regularly, and the maintenance programme should ensure a continuous ... of protection (ZOP) for the equipment using an air rod, suspended conductor or other means Establish a zone of protection (ZOP) for the equipment using an air rod, suspended conductor other means...

Ngày tải lên: 08/08/2014, 13:21

... is within a zone of protection and where necessary bonded to the structural lightning protection For example CCTV cameras should be safely positioned within the zone of protection provided by the ... it occurs between phase conductors to earth and neutral conductor to earth on a power line or signal line to earth on a telecommunication or data line During propagation of the surge, mode conversion ... inductive volt drops on the connecting leads of SPDs ● A factor of is taken into account for the worst case doubling voltage due to the oscillation protective distance SPD*s of the overvoltage type...

Ngày tải lên: 08/08/2014, 13:21

... structural Lightning Protection System and so reduce PB from to a lower value depending on the Class of LPS (I to IV) that we choose By the introduction of a structural Lightning Protection System, ... obvious that this long hand method is both laborious and time consuming, particularly for those people involved in the commercial world of lightning protection With the aid of the software it will ... lightning protection measures compared to the potential consequential losses that could be incurred, without any protection Clearly, the majority of times this information will simply not be available...

Ngày tải lên: 08/08/2014, 13:21

... flash consists of a first short stroke, which can be followed by subsequent short strokes One or more short strokes may be followed by a long stroke Duration of long stroke current (Tlong) Time ... here to discuss the actual findings The two solutions or protection measures both show annual savings of £15,456 and £17,205 What the overall economic decision of whether to provide protection measures ... positioned to maintain the protective angle zone of protection afforded to the air conditioning unit and additionally the air rod should be bonded directly to the casing of the air conditioning unit...

Ngày tải lên: 08/08/2014, 13:21

... Definition of zones Collection areas Number of dangerous events Expected annual loss of human life Loss of human life R1 Protection measures Solution A Solution B Solution C – Decision SPD recommendations ... Unacceptable loss of service to the public Risk of loss of human life R1 Risk of loss of service to the public R2 Protection measures Solution A Decision LPS design Air termination network Down conductor ... addition to their own core products, Thomas & Betts is also proud to be home to the following European brands: Furse is the UK’s leading manufacturer of lightning protection products Additionally,...

Ngày tải lên: 08/08/2014, 13:21

... supplier of premium performance protection products Table of Contents INTRODUCTION ERICO® Six Point Plan of Protection The Need for Coordinated Protection 3-4 Selecting Surge Protection ... technology provides low let-through voltage – offers superior protection compared to traditional spark gaps • Effective equipotential bonding – provides N-PE equilization protection bond on TT power ... protection philosophy The products and concepts outlined in this catalog relate to points & of the ERICO Six Point Plan Point of the Six Point Plan advocates a coordinated approach to surge protection, ...

Ngày tải lên: 26/02/2016, 19:40

... quan V o năm 1950–1951, W.G Pfann (PTN Bell Labs) lần giới thiệu kỹ thuật nâng cao độ Ge để chế t o transistor gọi kỹ thuật tinh luyện vùng (zone refining)  Tinh luyện vùng kỹ thuật bao gồm: ... (6.2) e Co TS NGUYỄN NGỌC HÀ 6.2.2 Tinh luyện vùng lần quét     Công thức toàn chiều dài ngoại trừ vùng cuối chiều dài vùng nóng chảy Khả tinh luyện phụ thuộc v o hệ số K Hình 6.5 đường cong biểu ... cho đạt hiệu cao Vận tốc quét tinh luyện vùng thường chậm, đặc biệt kim loại, dao động đến 150 mm/giờ TS NGUYỄN NGỌC HÀ 6.3.2 Bề rộng vùng nóng chảy     Bề rộng vùng nóng chảy phụ thuộc vào...

Ngày tải lên: 06/10/2016, 12:29