1、 ETSI TR 102 121 V1.2.1 (2005-11)Technical Report Environmental Engineering (EE);Guidance for power distributionto telecommunication and datacom equipmentETSI ETSI TR 102 121 V1.2.1 (2005-11) 2 Reference RTR/EE-020102 Keywords power supply, system ETSI 650 Route des Lucioles F-06921 Sophia Antipolis
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3、cument may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of th
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5、tatus.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction ex
6、tend to reproduction in all media. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benef
7、it of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TR 102 121 V1.2.1 (2005-11) 3 Contents Intellectual Property Rights4 Foreword.4 1 Scope 5 2 References 5 3 Definitions and abbreviations.6 3.1 Definitions6 3
8、.2 Abbreviations .7 4 Types of power supply systems7 4.1 DC supply.7 4.1.1 Mains operation 7 4.1.2 Battery operation 7 4.1.3 Floating/Parallel operation8 4.1.3.1 DC switch operation8 4.1.3.1.1 Switch operation with interruption 9 4.1.3.1.2 Switch operation without interruption.9 4.1.3.2 DC converter
9、 operation.9 4.1.3.3 Redundant dc distribution .9 4.2 AC supply.10 4.2.1 Mains operation 10 4.2.2 Inverter operation10 4.2.3 AC switch operation .10 4.2.3.1 AC switch operation with interruption10 4.2.3.2 AC switch operation without interruption (STS) 11 4.2.3.3 AC uninterruptible power supply syste
10、ms (UPS) .11 4.2.4 Reliability and redundancy .16 5 Power supply interfaces in telecommunication installations16 5.1 PSI 1 interface between primary power and telecommunication installations and equipment.17 5.1.1 Connection conditions 17 5.1.2 Harmonics and superimposition .18 5.1.3 Radio interfere
11、nce.18 5.1.4 Disturbances on the customer installation 18 5.1.5 Further sources of supply voltage .18 5.2 PSI 2 interface 18 5.2.1 Connection conditions 18 5.2.2 Radio interference.18 5.2.3 Interference voltage 19 5.3 PSI 3 interface between telecommunication installations or equipment and the telec
12、ommunication networks .19 5.3.1 Connection conditions 19 5.3.2 Operation with remote supply or current 19 5.3.3 Operation with ringing ac voltage.19 5.3.4 Radio interference.19 5.3.5 Interference voltage 20 5.4 Cabling and routing20 6 Earthing and equipotential bonding20 Annex A: Principle of artifi
13、cial dc mains network for measurement of disturbance21 History 22 ETSI ETSI TR 102 121 V1.2.1 (2005-11) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is public
14、ly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI W
15、eb server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or
16、 may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI Technical Committee Environmental Engineering (EE). ETSI ETSI TR 102 121 V1.2.1 (2005-11) 5 1 Scope The present document gives guidance on installation, connection and operation o
17、f power supply systems for telecommunication / datacom installations and equipments. Also considered are items of equipment with their own power supply, which are connected to form installations. The present document contains definitions for power supply and distribution systems not used in ETS/EN 3
18、00 132 series 5 to 7. 2 References For the purposes of this Technical Report (TR) the following references apply: 1 CENELEC HD 472 S1: “Nominal voltages for low-voltage public electricity supply systems“. 2 ETSI EN 300 386: “Electromagnetic compatibility and Radio spectrum Matters (ERM); Telecommuni
19、cation network equipment; Electro Magnetic Compatibility (EMC) requirements“. 3 CENELEC EN 60950-1: “Information technology equipment - Safety - Part 1: General requirements“. 4 CENELEC EN 60896-2: “Stationary lead-acid batteries - General requirements and methods of test - Part 2: Valve regulated t
20、ypes“. 5 ETSI ETS 300 132-1: “Equipment Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 1: Operated by alternating current (ac) derived from direct current (dc) sources“. 6 ETSI EN 300 132-2: “Environmental Engineering (EE); Power supply interface at the i
21、nput to telecommunications equipment; Part 2: Operated by direct current (dc)“. 7 ETSI EN 300 132-3: “Environmental Engineering (EE); Power supply interface at the input to telecommunications equipment; Part 3: Operated by rectified current source, alternating current source or direct current source
22、 up to 400 V“. 8 ETSI EN 302 099: “Environmental Engineering (EE); Powering of equipment in access network“. 9 ETSI EN 300 253: “Environmental Engineering (EE); Earthing and bonding of telecommunication equipment in telecommunication centres“. 10 ITU-T Recommendation K.20: “Resistibility of telecomm
23、unication equipment installed in a telecommunications centre to overvoltages and overcurrents“. 11 ITU-T Recommendation K.21: “Resistibility of telecommunication equipment installed in costumer premises to overvoltages and overcurrents“. 12 CENELEC HD 384 (all parts): “Electrical installations of bu
24、ildings“. 13 ETSI EN 301 489-1: “Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1: Common technical requirements“. 14 CENELEC EN 61000-3-2: “Electromagnetic compatibility (EMC) - Part 3-2: Limits - L
25、imits for harmonic current emissions (equipment input current up to and including 16 A per phase)“. 15 CENELEC EN 61000-3-3: “Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment w
26、ith rated current 16 A per phase and not subject to conditional connection“. 16 ITU-T Recommendation P.53: “Psophometer for use on telephone-type circuits“. ETSI ETSI TR 102 121 V1.2.1 (2005-11) 6 17 CENELEC EN 50310: “Application of equipotential bonding and earthing in buildings with information t
27、echnology equipment“. 18 CENELEC EN 61000-4-11: “Electromagnetic compatibility (EMC) - Part 4-11: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests“. 19 CENELEC EN 50174-2: “Information technology - Cabling installation - Part 2: Installatio
28、n planning and practices inside buildings“. 20 CENELEC EN 62040-1-1: “Uninterruptible power systems (UPS) - Part 1-1: General and safety requirements for UPS used in operator access areas“. 21 CENELEC EN 62040-1-2: “Uninterruptible power systems (UPS) - Part 1-2: General and safety requirements for
29、UPS used in restricted access locations“. 22 CENELEC EN 60896-11: “Stationary lead-acid batteries - Part 11: Vented types - General requirements and methods of tests“. 23 CENELEC EN 62310-1: “Static transfer systems (STS) - Part 1: General and safety requirements“. 24 IEC/prEN 60896-22: “Stationary
30、Lead-Acid Batteries, Part 22: Valve regulated types, Requirements“. 25 19 Pfl1: “Voltage limits for 60 V consumers in telecommunication installations of the Deutsche Telekom“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definition
31、s apply: current-using equipment: may be both a further power supply system or a telecommunication equipment NOTE: The telecommunication equipment with associated power supply may be considered as telecommunication installation or telecommunication equipment. disturbance: electromagnetic disturbance
32、 having components in the radio frequency range immunity: ability of a device, equipment or system to perform without degradation in the presence of an electromagnetic disturbance power supply system: power supply system is an electrical equipment, which makes available energy obtained from a primar
33、y power source (e.g. ac distribution) in a form suitable for the current-using equipment radio interference: degradation of the reception of a wanted signal caused by radio frequency disturbance supply voltage: is the voltage preferably obtained from the public distribution system or other primary e
34、lectric power sources Transfer Switch (TS): used in the UPS: integrated automatic bypass switch, which can be fully static, fully electromechanical or hybrid ETSI ETSI TR 102 121 V1.2.1 (2005-11) 7 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ac alte
35、rnating current dc direct currentMBS Maintenance Bypass Switch NOTE: For the manual bypass switch for the on-board bypass of the UPS. MOS Metal Oxide Semiconductor PSI Power Supply Interface SBS Systems Bypass Switch SD Safe Disconnection STS Static Transfer Switches (for the stand-alone static swit
36、ches) TS Transfer Switch UPS Uninterruptible Power Supply 4 Types of power supply systems In telecommunication installations and equipment the designation of a power supply system refers to its output. In this sense there are dc and ac supplies. The operating modes described below are basic forms, w
37、hich may be developed into more complex arrangements. 4.1 DC supply 4.1.1 Mains operation The current-using equipment is supplied with dc voltage obtained by a rectifier from the ac system (see figure 1). Current usingequipmentFigure 1: Principle of mains operation 4.1.2 Battery operation The curren
38、t-using equipment is supplied from a battery. Both primary and secondary cells (accumulators) can be used as batteries. The accumulator is disconnected from the current-using equipment for charging (see figure 2). current using equipment Figure 2: Principle of battery operation ETSI ETSI TR 102 121
39、V1.2.1 (2005-11) 8 4.1.3 Floating/Parallel operation The current-using equipment is connected continuously to a rectifier and battery (see figure 3). Current usingequipmentFigure 3: Principle of parallel operation The current-using equipment is supplied in parallel operation; the rectifier being dim
40、ensioned in such a way that it can cover the total power consumption of the current-using equipment and in addition supply an appropriate charging current for the battery (see figure 3). With this configuration the battery is continuously ready for operation in a fully charged condition. If the main
41、s ac voltage is outside of the specification (e.g. fails, reduction of voltage, high harmonics), the current-using equipment continues to be supplied without interruption. Parallel operation includes a very common charging mode known as floating mode and other charging modes such as intermittent cha
42、rge. Floating charge is a charging mode where the self-discharge of the battery is compensated by maintaining a sufficient voltage to the battery. The charging voltage can be varied due to temperature compensation. Intermittent charge is a charging mode where the self-discharge of the battery is com
43、pensated by periodically raising the voltage of rectifiers for short periods. Between these periods the rectifier voltage is left lower than it should be in floating mode. The aim is to reduce plate corrosion and loss of water, as well as to reduce the risk of thermal runaway. This may help to prolo
44、ng the life span of batteries used in outdoor equipments or areas with high ambient temperature. 4.1.3.1 DC switch operation The power requirement of the current using equipment is normally provided by a rectifier. A disconnected battery is maintained in a charged condition by a separate charger. If
45、 the rectifier fails, the current-using equipment is switched to the battery and supplied by the latter (see figure 4). Current usingequipmentFF Monitoring of the supply circuitFigure 4: Principle of dc switch operation ETSI ETSI TR 102 121 V1.2.1 (2005-11) 9 4.1.3.1.1 Switch operation with interrup
46、tion The power supply of the equipment is briefly interrupted when the current-using equipment is switched between the rectifier and the battery. The battery is not charged in this case by the main power supply but can be recharged in any mode (floating, intermittent) as previously described by a se
47、parate charger. Sizing of the primary ac power source and associated protection systems must take into account the maximum load of the telecom equipment and battery charging power. Battery charging power depends on the battery capacity and required charging-time. Generally, the charging power is fro
48、m 10 % to 100 % of the power supply of telecom equipment. This solution separates the functions of charging and supplying power to the current-using equipment and allows both to be optimized separately. 4.1.3.1.2 Switch operation without interruption The current-using equipment is switched by switch
49、ing equipment without interruption between the rectifier and the battery. The distance from the power source to the switching equipment as well as the input circuit of the current-using equipment should be considered. 4.1.3.2 DC converter operation The current-using equipment is supplied with a dc voltage obtained by a dc converter from a dc voltage system (see figure 5). If the dc/dc converter is isolated in accordance with EN 60950-1 3, different earth connections at input and output are requested. These connections m
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