1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 1481ISBN 0-7629-1257-XPower Supplies for Fire-Protective Signaling SystemsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTE
2、D MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Power Supplies for Fire-Protective Signaling Systems, UL 1481Fifth Edition, Dated December 12, 2006Summ
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19、 requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a fut
20、ure effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of therequirements in this Standard including those requirements with a specified future effective da
21、te, unlessthe applicant specifically requests that the product be judged under the current requirements. However, ifthe applicant elects this option, it should be noted that compliance with all the requirements in thisStandard will be required as a condition of continued Listing, Recognition, and Fo
22、llow-Up Services afterthe effective date, and understanding of this should be signified in writing.Copyright 2006 Underwriters Laboratories Inc.This Standard consists of pages dated as shown in the following checklist:Page Date1-68 .December 12, 2006A1-A2December 12, 2006DECEMBER 12, 2006 UL 1481tr2
23、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 12, 20061UL 1481Standard for Power Supplies for Fire-Protective Signaling SystemsFirst Edition August, 1978Second Edition May, 1987Third Edition February, 1994Fourth Edition April, 1999F
24、ifth EditionDecember 12, 2006An effective date included as a note immediately following certain requirementsis one established by Underwriters Laboratories Inc.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if
25、it incorporates themost recently adopted revisions, all of which are itemized on the transmittal noticethat accompanies the latest set of revised requirements. Comments or proposalsfor revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Propos
26、al Request in ULs On-LineCollaborative Standards Development System (CSDS) at http:/.ISBN 0-7629-1257-XCOPYRIGHT 2006 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 12, 2006POWER SUPPLIES FOR FIRE-PROTEC
27、TIVE SIGNALING SYSTEMS - UL 14812No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .62 General 72.1 Components .72.2 Units of measurement .72.3 Undated references .73 Glossary .8INSTRUCTIONS AND DR
28、AWINGS4 Details .94.1 General .94.2 Installation drawings 94.3 Operating instructions 10CONSTRUCTIONASSEMBLY5 General .106 Enclosures 116.1 General 116.2 Openings .116.3 Cast metal 156.4 Sheet metal 166.5 Nonmetallic .196.6 Doors and covers .196.7 Transparent covers 206.8 Screens and expanded metal
29、.207 Protection of Service Personnel .218 Electric Shock .229 Corrosion Protection .22FIELD-WIRING CONNECTIONS10 General 2311 Separation of Circuits .2312 Field-Wiring Compartment .2413 Terminals General Application 2414 Leads .2515 Grounding .25INTERNAL WIRING AND ASSEMBLY16 General 2617 Separation
30、 of Circuits .2717.1 General .2717.2 Barrier 2718 Bonding for Grounding 28DECEMBER 12, 2006 POWER SUPPLIES FOR FIRE-PROTECTIVE SIGNALING SYSTEMS - UL 1481 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCOMPONENTS ELECTRICAL19 General 3019.1
31、Mounting of components 3019.2 Insulating materials .3019.3 Current-carrying parts .3119.4 Bushings 3120 Meters .3121 Overcurrent Protection 3222 Semiconductors 3223 Storage Batteries .3224 Switches .3325 Transformers, Relays .3326 Spacings 33PERFORMANCEDETAILS27 General 3528 Test Voltages and Curren
32、ts 35TESTS POWER SUPPLIES29 Input Test Power Supplies .3630 Variable Voltage Operation Test Power Supplies 3630.1 Regulated power supplies .3630.2 Specific application power supplies .3731 Power-Limited Circuits .3731.1 General .3731.2 Maximum voltage 3931.3 Maximum current .3931.4 VAmax(not inheren
33、tly limited circuits only) .4032 Output Ripple Test 40TESTS POWER SUPPLY-BATTERY CHARGERS33 General 4034 Input Test Power Supplies-Battery Chargers .4035 Variable Voltage Operation Test Power Supplies-Battery Chargers 4136 Charging Current Tests 4136.1 General .4136.2 Battery discharge initial trial
34、 4136.3 Battery recharge .4236.4 Battery discharge second trial 42TESTS BATTERY CHARGERS37 General 4238 Input Test Battery Chargers 4239 Variable Voltage Operation Test Battery Chargers .4340 Charging Current Test .43DECEMBER 12, 2006POWER SUPPLIES FOR FIRE-PROTECTIVE SIGNALING SYSTEMS - UL 14814UL
35、COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTESTS ALL UNITS41 Variable Ambient Temperature Test .4342 Humidity Test 4343 Electric Shock Current Test 4444 Leakage Current Test .4845 Jarring Test 5146 Temperature Test .5247 Transient Tests .564
36、7.1 General .5647.2 Supply line transients .5647.3 Input/output circuit transients 5847.4 Internally induced transients .5948 Dielectric Voltage-Withstand Test .5949 Overload Test 6050 Endurance Test 6151 Abnormal Operation Test 6151.1 General .6151.2 Output short-circuit .6251.3 Blocked fan 6251.4
37、Variable autotransformer operation .6252 Coil Burnout Tests 6352.1 General .6352.2 Relays and solenoids .6352.3 Transformers 6353 Component Malfunction .6454 Strain Relief 6455 Impact Test for Enclosures .6456 Effect of Shipping and Storage Temperatures 64MANUFACTURING AND PRODUCTION TESTS57 Product
38、ion-Line Dielectric Voltage-Withstand Test 65MARKING58 General 6659 Permanence of Marking .68APPENDIX AStandards for ComponentsA1DECEMBER 12, 2006 POWER SUPPLIES FOR FIRE-PROTECTIVE SIGNALING SYSTEMS - UL 1481 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PE
39、RMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover commercial stationary and fixed power supplies for fire-protective signalingsystems, having input and output ratings of not more than 300 volts, direct- and alternating-current, (DCand AC), for use in indoor locations in accordance with
40、 the following Standards of the National FireProtection Association:NFPA 70National Electrical CodeNFPA 72National Fire Alarm Code1.2 These requirements also cover power supply-battery charger combinations used as power supplies,and battery charger units for use as components in fire-protective sign
41、aling systems.1.3 These requirements do not cover power supplies or battery chargers integral with control units oramplifiers intended for fire-protective signaling service.1.4 These requirements do not cover power supplies for use in hazardous locations, as defined in theNational Electrical Code, A
42、NSI/NFPA 70.1.5 These requirements do not cover commercial power supplies covered by the Standard for PowerUnits Other Than Class 2, UL 1012, or commercial battery chargers covered by the Standard for BatteryChargers for Charging Engine-Starter Batteries, UL 1236.1.6 A power supply that is not a com
43、plete assembly and depends upon installation in an end product forcompliance with the requirements of this standard shall be investigated under the requirements of thestandard for that end product.1.7 The term product as used in this standard refers to all power supplies, battery chargers, powersupp
44、ly-battery charger combinations, and battery charger units or any part thereof covered by thisstandard unless specifically noted otherwise.1.8 A product that contains features, characteristics, components, materials, or systems new or differentfrom those covered by the requirements in this Standard,
45、 and that involves a risk of fire, electric shock, orinjury to persons shall be evaluated using the appropriate additional component and end-productrequirements to determine that the level of safety as originally anticipated by the intent of this Standard ismaintained. A product whose features, char
46、acteristics, components, materials, or systems conflict withspecific requirements or provisions of this Standard shall not be judged to comply with this Standard.Where appropriate, revision of requirements shall be proposed and adopted in conformance with themethods employed for development, revisio
47、n, and implementation of this Standard.DECEMBER 12, 2006POWER SUPPLIES FOR FIRE-PROTECTIVE SIGNALING SYSTEMS - UL 14816UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2 General2.1 Components2.1.1 Except as indicated in 2.1.2, a component of a
48、product covered by this standard shall comply withthe requirements for that component. See Appendix A for a list of standards covering componentsgenerally used in the products covered by this standard.2.1.2 A component need not comply with a specific requirement that:a) Involves a feature or charact
49、eristic not needed in the application of the component in theproduct covered by this standard orb) Is superseded by a requirement in this standard.2.1.3 A component shall be used in accordance with its recognized rating established for the intendedconditions of use.2.1.4 Specific components are recognized as being incomplete in construction features or restricted inperformance capabilities. Such components are intended for use only under limited conditions, such ascerta
