1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS 8602:2013Method for assessment offire integrity of cast resinbusbar trunking systems forthe safety critical powerdistribution to life safetyand fire fighting systemsPublishing
2、 and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Institution 2013Published by BSI Standards Limited 2013ISBN 978 0 580 77324 2ICS 13.220.40; 29.060.20The following BSI references relate to the work on this
3、 document:Committee reference FSH/1Draft for comment 12/30256208 DCPublication historyFirst published April 2013Amendments issued since publicationDate Text affectedBS 8602:2013 BRITISH STANDARDContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 14 Apparatus 15 Test specimen
4、56 Installation of the test specimen in the furnace 77 Test procedure 118 Recording of results 119 Test report 12List of figuresFigure 1 Arrangement of the test specimen in the furnace 2Figure 2 Design of plate thermometer 5Figure 3 Standard temperature/time curve 8Figure 4 Basic circuit diagram 10S
5、ummary of pagesThis document comprises a front cover, an inside front cover, pages i to ii,pages 1 to 12, an inside back cover and a back cover.BRITISH STANDARD BS 8602:2013 The British Standards Institution 2013 iForewordPublishing informationThis British Standard is published by BSI Standards Limi
6、ted, under licence fromThe British Standards Institution, and came into effect on 30 April 2013. It wasprepared by Technical Committee FSH/1, Fire safety cables. A list oforganizations represented on this committee can be obtained on request to itssecretary.Relationship with other publicationsThe te
7、st method given in this British Standard is based on the furnace methodfor which general requirements are given in BS EN 1363-1.Information about this documentThe purpose of this test method is to measure the ability of a cast resin busbartrunking system to maintain circuit integrity to life safety
8、and fire fightingsystems when exposed to fire.The test method given in this British Standard has a test duration of 120 minwhich is considered to be the fire resistance period necessary for life safety andfire fighting applications when applied to busbar trunking distribution systems.It is emphasize
9、d that fire tests do not assess a fire hazard, nor can the results offire tests alone guarantee safety. They only provide information to assist in theassessment of the suitability of a cast resin busbar trunking for a givenapplication.Hazard warningsWARNING. This British Standard calls for the use o
10、f substances and/orprocedures that can be injurious to health if adequate precautions are nottaken. It refers only to technical suitability and does not absolve the userfrom legal obligations relating to health and safety at any stage.The test given in this British Standard might involve the use of
11、dangerousvoltages and temperatures. Suitable precautions should be taken against therisk of shock, burning, fire and explosion that might be involved and againstany noxious fumes that might be produced.Use of this documentIt has been assumed in the preparation of this British Standard that theexecut
12、ion of its provisions will be entrusted to appropriately qualified andexperienced people, for whose use it has been produced.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Itsmethods are expressed as a set of instructions, a description, or in s
13、entences inwhich the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented insmaller italic type, and does not constitute a normative element.Contractual and legal considerationsThis publication does not purport to include all the necessary provisi
14、ons of acontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legalobligations.BRITISH STANDARDBS 8602:2013ii The British Standards Institution 20131 ScopeThis British Standard gives a method for assessment of the fire integrity of
15、 castresin busbar trunking systems for the safety critical power distribution to lifesafety and fire fighting systems, intended to maintain circuit integrity whenexposed to fire. It is applicable to cast resin busbar trunkings of rated voltagenot exceeding 1 000 V a.c.NOTE Busbar trunking systems ar
16、e specified in BS EN 61439-6:2012.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thisdocument and are indispensable for its application. For dated references, onlythe edition cited applies. For undated references, the latest edition of thereferenced
17、 document (including any amendments) applies.BS 8491:2008, Method for assessment of fire integrity of large diameter powercables for use as components for smoke and heat control systems and certainother active fire safety systemsBS EN 1363-1:1999, Fire resistance tests Part 1: General requirementsBS
18、 EN 60584-1:1996, Thermocouples Part 1: Reference tablesBS EN 61439-6:2012, Low-voltage switchgear and controlgear assemblies Part 6:Busbar trunking systems (busways)BS EN ISO 13943:2010, Fire safety Vocabulary3 Terms and definitionsFor the purposes of this standard, the terms and definitions given
19、inBS EN 1363-1:1999, BS EN 61439-6:2012 and BS EN ISO 13943:2010 apply.4 Apparatus4.1 Test equipment, as specified in BS EN 1363-1:1999, Clause 4, including theequipment specified in 4.2 to 4.4.4.2 Furnace, capable of subjecting the busbar trunking assembly under test tothe standard heating and pres
20、sure conditions specified in BS EN 1363-1 andsuitable for testing a busbar trunking assembly comprising both a vertical and ahorizontal section of busbar trunking as shown in Figure 1. The furnace shall beof sufficient size to accommodate the minimum dimensions of the test specimencomprising the com
21、ponents detailed in Clause 5 and as illustrated in Figure 1.The furnace shall have an opening in the roof for the vertical section of thebusbar trunking and an opening in the wall for the horizontal section of thebusbar trunking.4.3 Six thermocouples, comprising plate type thermometers, type K as de
22、fined inBS EN 60584-1:1996 (see Figure 2), to provide a continuous indication of thetemperature at key points within the furnace (see 6.2).4.4 Equipment for measuring and recording furnace pressure, as specified inBS EN 1363-1:1999, Clause 4.BRITISH STANDARD BS 8602:2013 The British Standards Instit
23、ution 2013 1Figure 1 Arrangement of the test specimen in the furnaceDimensions in millimetresa) Front elevationKey1 Fire stopping 5 Suspension device2 Furnace roof 6 Joint3 Busbar trunking specimen 7 Furnace wall4 Fire rated tap-off unit (if applicable)BRITISH STANDARDBS 8602:20132 The British Stand
24、ards Institution 2013Figure 1 Arrangement of the test specimen in the furnaceDimensions in millimetresb) Side elevationKey1 Fire stopping 5 Suspension device2 Furnace roof 6 Joint3 Busbar trunking specimen 7 Furnace wall4 Fire rated tap-off unit (if applicable)BRITISH STANDARD BS 8602:2013 The Briti
25、sh Standards Institution 2013 3Figure 1 Arrangement of the test specimen in the furnaceDimensions in millimetresc) Side elevation (where a tee section is to be tested)Key1 Fire stopping 7 Furnace wall2 Furnace roof 8 Tee section3 Busbar trunking specimen 9 Spring hanger4 Fire rated tap-off unit (if
26、applicable) 10 End feed box5 Suspension device 11 Fire rated cable6 JointsBRITISH STANDARDBS 8602:20134 The British Standards Institution 2013Figure 2 Design of plate thermometerDimensions in millimetresKey1 Sheathed thermocouple with insulated hotjunction4 Insulation material5 Nickel alloy strip (0
27、.7 0.1) mm thick2 Spot welded or screwed steel strip 6 Face A3 Hot junction of thermocoupleNOTE This figure is identical to BS EN 1363-1:1999, Figure 1.5 Test specimen5.1 GeneralThe busbar trunking test specimen shall incorporate the following busbartrunking units and accessories: straight lengths;
28、bends; tee sections (if applicable); panel flanges (if applicable); support assemblies; joints;BRITISH STANDARD BS 8602:2013 The British Standards Institution 2013 5 spring hangers; and tap-off units (if applicable).In the test specimen the busbar trunking configuration shall be representative ofthe
29、 manufacturers recommended installation arrangement.The test specimen shall comprise of both a vertical and a horizontal section ofbusbar trunking, each coupled to a 90 bend (as shown in Figure 1) utilizing themanufacturers fire rated jointing materials (see 5.2).5.2 JointsThe test specimen shall in
30、corporate the manufacturers standard jointingassembly, which shall be installed and assembled strictly in accordance with themanufacturers installation instructions.The jointing process used, which is a critical element of the test, shall beaccurately recorded and documented in the test report, iden
31、tifying the jointingmethods and materials utilized.Time shall be allowed for the conditioning of the jointing materials, as requiredby the manufacturers installation instructions, prior to the fire test commencing.5.3 Busbar trunking supportsThe test specimen shall be fixed and supported as a busbar
32、 trunking assemblywould be in practice, by means of the manufacturers standard support hangersin accordance with the manufacturers installation instructions.The busbar trunking supports shall be installed at the maximum spacing fromthe centre line of the joint recommended by the manufacturer, to giv
33、e the worstcase installation conditions.5.4 Fire rated tap-off unitsOne or more fire rated tap-off units shall be included as part of the testspecimen, when applicable.NOTE Where the busbar trunking is to be used in a riser with tap-off units atvarious floor levels it would be necessary to include t
34、he tap-off unit as part of thetest specimen. However, where the busbar trunking is to be used as a feeder frompoint A to point B without tap-off circuits along the busbar trunking length, itwould not be necessary to incorporate the tap-off unit in the test specimen.If fire rated tap-off units are in
35、stalled, they shall be installed on the horizontaland/or vertical busbar trunking sections, as they would be in practice.5.5 Description of busbar trunking assembly in the test specimenA detailed description of the complete busbar trunking assembly in the testspecimen and all of its individual compo
36、nents shall be provided as part of thetest report.5.6 Application of fire retardant materialWhere a busbar trunking assembly of the type being tested would normallyhave fire retardant material applied, fire retardant material shall be applied tothe test specimen.BRITISH STANDARDBS 8602:20136 The Bri
37、tish Standards Institution 20136 Installation of the test specimen in the furnace6.1 GeneralThe test specimen shall be located within the furnace in such a way as toprevent direct flame impingement on the test specimen.The vertical and horizontal sections of busbar trunking in the test specimen shal
38、lbe installed so as to allow for the expansion of the test specimen. The verticalsection shall be installed through the roof of the furnace and shall incorporatethe manufacturers standard spring hanger assembly that would be used for theinstallation of the busbar trunking within a riser.The vertical
39、 section of the busbar trunking assembly shall be sufficiently long togive a minimum straight section length of 1 m within the furnace (excluding thebend and joining materials).The horizontal section of the busbar trunking assembly shall be sufficiently longto give a minimum straight section length
40、of 3 m within the furnace (excludingthe bend and jointing materials).The test specimen shall be installed in the furnace in a manner representative ofits use in practice.The structural openings in the wall and roof of the furnace after the busbartrunking has been installed shall be fire stopped.NOTE
41、 1 The method of fire stopping is at the testers discretion.NOTE 2 The fire stopping materials selected should be sufficiently robust tomaintain the test conditions within the furnace.The parts of the busbar trunking assembly within the furnace shall be installedin such a way that they are exposed t
42、o the heat from the flames from thefurnace burners from all sides over their whole length.There shall be a clearance of (500 50) mm between the top of the busbartrunking or busbar trunking tap-off and the roof of the furnace and also atleast 500 mm between the underside of the horizontal section of
43、the busbartrunking assembly and the floor of the furnace. Similarly there shall be aclearance of 500 mm between the sides of the busbar trunking assembly andthe furnace walls. There shall also be a clearance of 500 mm between thevertical section of the busbar trunking assembly and the furnace walls.
44、Where two or more test specimens are to be tested in the furnace at the sametime, at least 500 mm clearance shall be provided between the specimens.6.2 Application of instrumentationThe six thermocouples (4.3) shall be installed in the furnace; threethermocouples shall be located either side of the
45、test specimen, equally spacedalong the length of the horizontal run of busbar trunking, at a distance of(100 50) mm from the exposed face of the test specimen and at the mid-heightof the specimen, to ensure they give a reliable indication of the meantemperature in the vicinity of the test specimen.T
46、he thermocouples shall be positioned so that they are not in contact with theflames from the furnace burners and so that they are at least 450 mm awayfrom the floor, roof or any wall of the furnace.The furnace temperature given by the mean value of the readings from the sixthermocouples shall be rec
47、orded at intervals not exceeding 1 min for theduration of the heating period.BRITISH STANDARD BS 8602:2013 The British Standards Institution 2013 7The mean temperature of the furnace derived from the mean reading of the sixthermocouples shall be monitored and controlled such that it follows thestand
48、ard time temperature curve indicated in Figure 3.A pressure of 20 Pa shall be maintained within the furnace measured 100 mmbelow the roof of the furnace. The furnace pressure shall be measured andrecorded continuously or at intervals of not more than 1 min.Figure 3 Standard temperature/time curveKey
49、T Temperature (C)t Time (min)NOTE This figure is identical to BS EN 1363-1:1999, Figure 7.6.3 Electrical connections to the test specimenThe exposed conductors at each end of the busbar trunking test specimen shallbe connected as indicated in Figure 4. The transformer(s) windings shall beconnected to the phase conductors at one end of the test specimen, whilst theneutral and protective conductors shall be connected to earth as indicated. Anymetal screen casings or support brackets shall be connected to earth.For a three-p
