BS EN 50091-1-1:1997:2004 Edition
$167.15
Uninterruptible power systems (UPS) – General and safety requirements for UPS used in operator access areas
| Published By | Publication Date | Number of Pages |
| BSI | 2004 | 40 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | National foreword |
| 4 | Foreword Contents |
| 7 | Scope 1.1.1 This Standard applies to electronic indirect a.c. convertor systems with an electrical energy sto… 1.1.2 Even if this Standard does not cover all types of UPS, it may be taken as a guide for such UPS. R… Normative references |
| 8 | 1.3 Definitions 1.3.1 General 1.3.1.1 uninterruptible power system (UPS) 1.3.1.2 continuity of load power 1.3.1.3 functional unit 1.3.1.4 bypass 1.3.1.5 power failure |
| 9 | 1.3.1.6 primary power 1.3.1.7 bypass power 1.3.1.8 apparent output power 1.3.1.9 active power 1.3.1.10 load power factor 1.3.1.11 peak factor 1.3.1.12 rated voltage 1.3.1.13 rated voltage range 1.3.1.14 rated current 1.3.1.15 rated frequency 1.3.1.16 rated frequency range 1.3.1.17 rated apparent output power |
| 10 | 1.3.1.18 rated active output power 1.3.1.19 backfeed 1.3.2 Operating conditions 1.3.2.1 reference load 1.3.2.2 linear load 1.3.2.3 non-linear load 1.3.2.4 stand-by power 1.3.2.5 stored energy mode 1.3.2.6 stored energy time |
| 11 | 1.3.2.7 restored energy time 1.3.3 equipment mobility 1.3.4 classes of UPS 1.3.5 Connections 1.3.5.1 power cord 1.3.6 enclosures 1.3.7 accessibility 1.3.8 Circuit characteristics 1.3.8.1 hazardous voltage 1.3.9 insulation 1.3.10 creepage distances and clearances 1.3.11 components 1.3.12 power distribution 1.3.13 flammability |
| 12 | 1.3.14 Miscellaneous 1.3.14.1 touch current 1.3.14.2 protective conductor current 1.3.14.3 type test 1.4 General requirements 1.4.1 UPS design and construction 1.4.2 Sufficient information shall be provided to the user concerning any condition necessary to ensure… 1.4.3 Equipment is classified according to its protection from electric shock as: |
| 13 | 1.5 General conditions for tests 1.5.1 Except where specific test conditions are stated elsewhere in the Standard and, where it is clear… 1.5.2 In determining the most unfavourable supply voltage for a test, the following variables shall be … 1.5.3 In determination of input current, and where other test results could be affected, the following … 1.6 Components 1.7 Power interfaces 1.7.1 The neutral conductors, if any, shall be insulated from earth and the body throughout the equipme… |
| 14 | 1.8 Marking and instructions 1.8.1 Power rating |
| 15 | 1.8.2 Safety instructions 1.8.3 Mains voltage adjustment 1.8.4 Power outlets 1.8.5 Fuses |
| 16 | 1.8.6 Wiring terminals 1.8.7 Battery terminals 1.8.8 Controls and indicators 1.8.9 Isolation of multiple power sources 1.8.10 IT power systems 1.8.11 Protection in building installation 1.8.12 High leakage current |
| 17 | 1.8.13 Thermostats and other regulating devices 1.8.14 Language 1.8.15 Durability of markings 1.8.16 Marking on removable parts 1.8.17 Lithium batteries 1.8.18 Operator access with a tool 1.8.19 Battery |
| 18 | 1.8.20 Signalling circuits 1.8.21 Internal circuit configuration 2 Fundamental design requirements 2.1 Protection against electric shock and energy hazards 2.1.1 This Standard specifies two categories of requirements for protection against electric shock from… 2.1.2 Where the insulation of internal wiring at ELV is accessible to an operator, this wiring shall: |
| 19 | 2.1.3 Equipment shall be so designed that at external points of disconnection of the supplies, there is… 2.1.4 A UPS intended to be connected with flexible cord and plug shall be provided with backfeed protec… 2.1.5 Where the protection mentioned in 2.1.6 The UPS shall be provided with an integral single Emergency Switching Device (or terminals for th… 2.2 Insulation |
| 20 | 2.2.1 For the purpose of determining working voltage: 2.3 Safety Extra-Low Voltage (SELV) circuits 2.3.1 The equipment shall also be constructed as follows: 2.4 Limited current circuits 2.5 Provisions for protective earthing 2.5.1 Accessible conducive parts of Class I equipment which might assume a hazardous voltage in the eve… |
| 21 | 2.5.2 For Class I — pluggable type A, the UPS shall provide sufficient terminals, earthed socket-outlet… 2.6 A.C. and D.C. power isolation 2.6.1 Disconnection devices shall be provided to disconnect the UPS from the a.c. supplies for servicin… 2.6.2 For three-phase equipment, the disconnect device(s) shall disconnect simultaneously all phase con… 2.6.3 Where the disconnect device is a switch incorporated in the equipment, its “on” and “off” positio… 2.6.4 Where a permanently connected unit receives power from more than one external source (e.g. from d… 2.6.5 For both internal and external d.c. battery supplies, disconnect devices or means of isolation sh… 2.7 Overcurrent and earth fault protection 2.7.1 Protection against excess currents, short-circuits and earth faults in input and output circuits … |
| 22 | 2.7.2 A battery supply circuit shall be provided with overcurrent protection complying with the require… 2.7.3 Where the batteries are installed inside the UPS, the battery supply circuit shall be provided wi… 2.7.4 Where the batteries are installed outside the UPS, the location of the overcurrent protective dev… 2.7.5 The rating of the overcurrent protective device located internally shall be such as to protect ag… Table 1 Location of battery protective device(s) 2.8 Protection of personnel — Safety interlocks 2.8.1 In addition to the requirements of 2.8.5/RD, the following subclauses apply to service personnel … 2.8.2 Parts at hazardous voltage or energy level shall be so arranged, and covers so located as to redu… 2.8.3 Parts at hazardous voltage or energy level and moving parts that involve a risk of injury to pers… |
| 23 | 2.8.4 Parts at hazardous voltage or energy level, located on the rear side of a door, shall be guarded … 2.8.5 A component that requires inspection, resetting, adjustment, servicing or maintenance while energ… 2.8.6 For an adjustment that is to be made with a screwdriver or similar tool when the UPS is energized… 2.8.7 Moving parts that can cause injury to persons during service operations shall be located or prote… 2.8.8 Capacitor banks shall be fitted with a means of discharge for protection of service personnel. A … 2.8.9 Internal batteries shall be so arranged to minimize risk of electric shock from inadvertent conta… 2.9 Clearances, creepage distances and distances through insulation 2.10 External signalling circuits 2.11 Limited power source 2.12 Protection of the applied load |
| 24 | 3 Wiring, connections and supply 3.1 General 3.2 Connection to power 3.2.1 For safe and reliable connection to the primary power supply, the UPS shall be provided with one … 3.3 Wiring terminals for external power conductors 4 Physical requirements |
| 25 | 4.1 Stability and mechanical hazards 4.1.1 Under conditions of normal use, units and equipment shall not become physically unstable to the d… 4.2 Mechanical strength and stress relief 4.3 Construction details 4.3.1 Openings vertically above bare parts at hazardous voltages in the top of a fire enclosure or an e… 4.3.2 Any opening in the side of a fire enclosure or an electrical enclosure shall either: |
| 26 | 4.3.3 Equipments that, in normal use, contain batteries, shall incorporate adequate safeguards against … 4.3.4 Equipment provided with castors to enable easy movement to installed position and intended to hav… 4.4 Resistance to fire 4.5 Battery location 4.5.1 General requirements for installation |
| 28 | 5 Thermal and electrical requirements 5.1 Heating 5.2 Earth leakage current 5.2.1 Where the circuit configuration is such that in any mode of operation the UPS protective earth co… 5.2.2 UPS classified as pluggable Type B shall have a non-detachable power supply cord meeting the requ… 5.3 Electric strength 5.4 Abnormal operating and fault conditions 5.4.1 For components and circuits other than those covered by 5.4.2/RD, 5.4.3/RD and 5.4.5/RD, complian… |
| 29 | 5.4.2 Equipment shall be tested by applying any condition that may be expected in normal use and forese… |
| 30 | Annex A (normative) Test for resistance to heat and fire Annex B (normative) Motor test under abnormal conditions Annex C (normative) Transformers Annex D (normative) Measuring instruments for earth leakage current test Annex E (normative) Temperature rise of a winding Annex F (normative) Measurements of creepage distances and clearances Annex G (normative) Earth leakage current for UPS intended to be connected directly to�IT power systems Annex J (informative) Table of electrochemical potentials Annex K (normative) Thermal controls Annex H (informative) Guidance on protection against ingress of water and foreign objects H.1 When intended application is such that the ingress of water or foreign objects is possible, an ap… |
| 31 | Table H.1 Degrees of protection against foreign objects indicated by the first characteristic�numeral |
| 32 | Table H.2 Degrees of protection against water indicated by the second characteristic numeral Annex L (normative) Backfeed protection test |
| 33 | Annex M (normative) Examples of reference load conditions M.1 General |
| 34 | M.2 Reference resistive load M.3 Reference inductive-resistive load |
| 35 | M.4 Reference capacitive-resistive loads M.5 Reference non-linear load |
| 37 | Annex N(normative) Ventilation of battery compartments N.1 Notes for guidance N.2 Application to lead-acid batteries N.3 Ventilation requirements (normative) |
| 38 | Annex P (normative) Annex Q (informative) A-Deviations |
