ATIS 0600313-2013 Electrical Protection for Telecommunications Central Offices and Similar Type Facilities.pdf

1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-0600313.2013 ELECTRICAL PROTECTION FOR TELECOMMUNICATIONS CENTRAL OFFICES AND SIMILAR TYPE FACILITIES As a leading technology and solutions development organization, ATIS brings together the top global ICT companies to advance the industrys mos

2、t-pressing business priorities. Through ATIS committees and forums, nearly 200 companies address cloud services, device solutions, emergency services, M2M communications, cyber security, ehealth, network evolution, quality of service, billing support, operations, and more. These priorities follow a

3、fast-track development lifecycle from design and innovation through solutions that include standards, specifications, requirements, business use cases, software toolkits, and interoperability testing. ATIS is accredited by the American National Standards Institute (ANSI). ATIS is the North American

4、Organizational Partner for the 3rd Generation Partnership Project (3GPP), a founding Partner of oneM2M, a member and major U.S. contributor to the International Telecommunication Union (ITU) Radio and Telecommunications sectors, and a member of the Inter-American Telecommunication Commission (CITEL)

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11、imer Requirements for equipment within the facilities; Specifications for equipment grounding (earthing) and bonding topologies. Such specifications are covered in ATIS-0300333, Grounding and Bonding of Telecommunication Equipment, clause 8, Telecommunication Systems Grounding; Device-level specific

12、ations for electrical protection apparatus; Specifications for power quality or power conditioning; Specifications for electrical protection from high altitude electromagnetic pulse (HEMP) see ATIS-0600320; Electrical protection of telecommunications outside plant - see ATIS-0600316; The customer ne

13、twork interface - see ATIS-0600318; ATIS-0600313.2013 2 Customer premises equipment; and Electrical protection of network operator-type equipment positions see ATIS-0600321. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions

14、 of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the stan

15、dards indicated below. ANSI C2-2007, National electrical safety code.1ANSI C62.61-1993, Gas tube surge arresters on wire line telephone circuits.2ANSI/TIA/EIA 222-F-1996, Structural standards for steel antenna towers and antenna supporting struc-ture.2ANSI/IEEE C62.41-1991 (R1995), Recommended pract

16、ice for surge voltages in low-voltage ac power cir-cuits.3ANSI/IEEE 100-1996, Dictionary of electrical and electronics terms.3ANSI/IEEE 367-1996 (R2002), Recommended practice for determining the electric power station ground potential rise and induced voltage from a power fault.3ANSI/NFPA 70-2008, N

17、ational Electrical Code.4ANSI/NFPA 780-2000, Standard for the installation of lightning protection systems.4ATIS-0600333.2013, Grounding and Bonding of Telecommunications Equipment.5ATIS-0600029.2013, Standard for Irreversible Compression Lugs, Inline Splices, and Taps.6IEEE 81-1983, Guide for measu

18、ring earth resistivity, ground impedance and earth surface potentials of a ground system.33 Definitions Unless otherwise defined in this clause, the definitions of all terms used in this standard conform to AN-SI/IEEE 100. 3.1 appurtenance: Accessory objects or apparatus including but not limited to

19、 guys, antenna as-semblies, transmission lines, reflectors, conduit, lighting, climbing facilities, platforms, signs, and anti-climbing devices. 1This document is available from the Institute of Electrical and Electronics Engineers (IEEE). 2This standard is a revision and redesignation of ANSI/EIA/T

20、IA 222-, and is available from the Telecommunications Industry Association (TIA). 3This document is available from the Institute of Electrical and Electronics Engineers (IEEE). 4This document is available from the National Fire Protection Association (NFPA). 5This document is available from the Alli

21、ance for Telecommunications Industry Solutions (ATIS) at . 6This document is available from the Alliance for Telecommunications Industry Solutions (ATIS) at . ATIS-0600313.2013 3 3.2 building principal ground (BPG): The interface between the interior and exterior grounding sys-tems and the ground re

22、ference point for the building. It is normally a terminal or bus bar provided for the connection of grounding conductors. 3.3 coordinated electrical protection: All the protection elements, internal and external to the equipment, react in such a way so as to limit the amount of energy, voltage, or c

23、urrent to levels such that damage does not occur to protection elements or equipment when tested under specified surge condi-tions. 3.4 down conductor: The conductor connecting the air terminal or main roof perimeter lightning pro-tection ring to the grounding (earthing) electrode system. 3.5 electr

24、onic current limiter (ECL): A semi-conductor device that reacts under surge or AC cur-rent fault conditions by switching into a high-impedance state once the current threshold has been ex-ceeded. 3.6 electronic equipment enclosure (EEE): An enclosure housing telecommunications electronics equipment.

25、 It may consist of a weatherproof enclosure, equipment pod, or an equipment hut. Types of equipment contained in an EEE might be switches, carrier electronics, or remote terminals. The EEE may be located remotely from a central office, and may be located above or below ground. The temperature and hu

26、midity within the EEE may be controlled. The EEE, like the central office, is served by telecommu-nications outside plant cable, which may be aerial, directly buried, or placed in underground conduit. It may also be served by commercial ac power facilities, and may have provisions for standby power.

27、 3.7 extended Reference Point 0: In a multifloor facility, one electrically continuous conductor ex-tending vertically within the building to extend reference point 0 to other floors as required. 3.8 floor ground bar (FGB): A copper bus bar provided on each floor for equipment grounding. It is conne

28、cted to the vertical ground riser and effectively extends the grounding electrode system from the building principal ground to all floors. 3.9 fuse link (Fuse cable): A fine gauge section of wire or cable that serves as a fuse (i.e., open-circuits to interrupt the current should it become excessive)

29、 that coordinates with telephone cable, wire plant, protector, and connector stub. 3.10 ground flash density: Probable annual number of lightning flashes per square kilometer. 3.11 ground terminal: The portion of a Lightning Protection System (LPS) such as a ground rod, ground plate, or ground condu

30、ctor that is installed for the purpose of providing electrical contact with the earth. 3.12 ground window: The interface or transition point between the isolated and integrated ground planes. The ground window can be a dimensional area around a bus bar or the bus bar itself. After pass-ing through t

31、he ground window, there shall be no additional paths to ground, intentional or unintentional, inside the isolated ground plane. The ground window is identical to the Single Point Connection Window (SPCW) of ATIS-0600333. 3.13 heat coil: An electro-mechanical protection element which heats in the pre

32、sence of excess cur-rent and causes the circuit to short to ground. 3.14 integrated ground plane: A set of interconnected frames that is intentionally grounded via multi-ple connections to a ground reference. Multiple connections are intended to keep voltage drops due to power faults in the ac or dc

33、 power systems or from lightning to acceptable levels. Building steel, water pipes, ground rod systems, counterpoises, vertical and horizontal ground reference conductors, ground-ing (earthing) wires, and metallic raceways form an integrated ground plane when bonded together by a multiplicity of bot

34、h deliberate and incidental connections. The integrated ground plane is also known as the common bonding network (CBN).7 7See ITU-T K.27, listed in Annex B, Bibliography, for more information. ATIS-0600313.2013 4 3.15 isolated ground plane: A set of interconnected frames that is intentionally ground

35、ed via only one connection to a ground reference. This plane, taken as a conductive unit with all of its metallic surfaces and grounding (earthing) wires bonded together, shall be insulated from contact with any other grounded metalwork in the building. The isolated ground plane is also known as the

36、 Isolated Bonding Network (IBN).3 3.16 LPS (lightning protection system): A complete system used to reduce physical damage due to lightning flashes to a structure. 3.17 metallic member: A non-communications metallic cable component such as a shield, vapor bar-rier, or strength member. 3.18 outside p

37、lant: That portion of the telephone plant that is normally located outside of buildings. It may consist of aerial, buried or underground conduit cable facilities, and associated terminals, closures, pedestals, and supporting structures. 3.19 panelboard: A single panel or group of panel units designe

38、d for assembly in the form of a single panel, including buses and automatic overcurrent devices, and equipped with or without switches for the control of light, heat, or power circuits; designed to be placed in a cabinet or cutout box placed in or against a wall, partition, or other support; and acc

39、essible only from the front. 3.20 positive temperature coefficient device (PTC): A device that provides overcurrent protection by increasing its resistance significantly when the current flowing through it rises above a threshold level. Once the normal circuit operation is restored, the device reset

40、s to its normal resistance. 3.21 protector: A device consisting of one or more protector units intended to limit abnormal surges on metallic communications circuits. Includes a mounting assembly for the protector units. 3.22 protector unit: A device to protect against overvoltage, overcurrent, or bo

41、th. The unit may con-tain carbon arresters, gas tubes, solid state devices, heat coils, PTC devices, or a combination of these components for a specific application. 3.23 reference point 0: The point at which all ground categories within the facility are referenced to earth. 3.24 remote terminal: Th

42、e location at which there is a transition between a telecommunications carri-er facility and the local lines serving the individual customers. 3.225 secondary ground: A conducting connection between an appurtenance and the structure. 3.26single point connection window (SPCW): The interface or transi

43、tion region between an IBN and the CBN, typically envisaged as a sphere with a diameter of 2 m (6 feet). 3.27 sneak current: An abnormal current on a telecommunication conductor that is insufficient to open a fuse wire or line fuse and is driven by a voltage that is insufficient to operate any overv

44、oltage pro-tector. 3.28 Surge Protective Device (SPD): An assembly of one or more components intended to limit or divert surges. The device contains at least one nonlinear component. In the context of this document, SPDs are used with ac power circuits. 3.29 tip cable (Connector stub): A telecommuni

45、cations cable that connects the entrance cable to the protector. 4 Acronyms ac alternating current ANSI American National Standards Institute AOT Area of Termination ATIS-0600313.2013 5 AWG American Wire Gauge BPG Building Principal Ground CBN Common Bonding Network dc direct current EEE Electronic

46、Equipment Enclosures EIA Electronic Industries Alliance FGB Floor Ground Bar GEC Grounding Electrode Conductor HEMP High Altitude Electromagnetic Pulse Hz Hertz IBN Isolated Bonding Network IEEE Institute of Electrical and Electronic Engineers ITU International Telecommunications Union LPS Lightning

47、 Protection System m meter MGB Master Ground Bar mm millimeter NFPA National Fire Protection Association OPD Overcurrent Protective Device PTC Positive Temperature Coefficient rms Root Mean squared SPCW Single Point Connection Window SPD Surge Protective Device TIA Telecommunications Industry Associ

48、ation F microFarad 5 Exposure 5.1 Sources of Unwanted Voltages Contact with electric power circuits; Ground potential rise; or Induction from electric power lines. A determination of the exposure status of a telecommunications facility shall take into account both the ex-posure of the facility, as w

49、ell as the outside plant that serves it. Any facility that is classified as exposed shall require coordinated electrical protection. ATIS-0600313.2013 6 5.1.1 Lightning Exposure A telecommunications facility shall be defined as exposed to lightning unless the ground flash density is an average of 0.3 flashes/km2per year or fewer and earth resistivity is less than 100 ohm-meters, as meas-ured in accordance with IEEE 81 (Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System, Part 1 Normal Measur