1、 Reference number ISO 7240-17:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 7240-17 First edition 2009-08-15 Fire detection and fire alarm systems Part 17: Short-circuit isolators Systmes de dtection dincendie et dalarme Partie 17: Isolateurs de court-circuit ISO 7240-17:2009(E) PDF disclaimer This PDF
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5、ISO 2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in t
6、he country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedISO 7240-17:2009(E) ISO 2009 All rights reserved iii Contents Page Foreword
7、 iv Introduction . vi 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Requirements 2 4.1 Compliance 2 4.2 Integral status indication . 2 4.3 Connection of ancillary devices 2 4.4 Monitoring of detachable short-circuit isolators. 3 4.5 Manufacturers adjustments 3 4.6 On-site adjus
8、tments . 3 4.7 Marking 3 4.8 Data 3 4.9 Additional requirements for software controlled short-circuit isolators 4 5 Tests. 5 5.1 General. 5 5.2 Reproducibility 7 5.3 Variation in supply voltage 8 5.4 Dry heat (operational). 8 5.5 Cold (operational) . 9 5.6 Damp heat, cyclic (operational). 10 5.7 Dam
9、p heat, steady state (endurance). 10 5.8 Sulfur dioxide (SO 2 ) corrosion (endurance) 11 5.9 Shock (operational) 12 5.10 Impact (operational) 13 5.11 Vibration, sinusoidal (operational) 14 5.12 Vibration, sinusoidal (endurance). 15 5.13 Electromagnetic compatibility (EMC), immunity tests (operationa
10、l). 16 6 Test report . 17 Annex A (informative) Examples for the functional test procedure 18 Annex B (informative) Apparatus for impact test . 25 Bibliography . 27 ISO 7240-17:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide fed
11、eration of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that comm
12、ittee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accorda
13、nce with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires
14、 approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7240-17 was prepared by Technical
15、 Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 3, Fire detection and alarm systems. ISO 7240 consists of the following parts, under the general title Fire detection and fire alarm systems: Part 1: General and definitions Part 2: Control and indicating equipmen
16、t Part 4: Power supply equipment Part 5: Point-type heat detectors Part 6: Carbon monoxide fire detectors using electro-chemical cells Part 7: Point-type smoke detectors using scattered light, transmitted light or ionization Part 8: Carbon monoxide fire detectors using an electro-chemical cell in co
17、mbination with a heat sensor Part 9: Test fires for fire detectors Technical Specification Part 10: Point-type flame detectors Part 11: Manual call points Part 12: Line type smoke detectors using a transmitted optical beam Part 13: Compatibility assessment of system components Part 14: Guidelines fo
18、r drafting codes of practice for design, installation and use of fire detection and fire alarm systems in and around buildings Technical Report Part 15: Point type fire detectors using scattered light, transmitted light or ionization sensors in combination with a heat sensor ISO 7240-17:2009(E) ISO
19、2009 All rights reserved v Part 16: Sound system control and indicating equipment Part 17: Short-circuit isolators Part 18: Input/output devices Part 19: Design, installation, commissioning and service of sound systems for emergency purposes Part 20: Aspirating smoke detectors Part 21: Routing equip
20、ment Part 22: Smoke-detection equipment for ducts Part 24: Sound-system loudspeakers Part 25: Components using radio transmission paths Part 27: Point-type fire detectors using a scattered-light, transmitted-light or ionization smoke sensor, an electrochemical-cell carbon-monoxide sensor and a heat
21、sensor Part 28: Fire protection control equipment A Part 3, dealing with audible alarm devices and a Part 23, dealing with visual alarm devices, are in preparation. ISO 7240-17:2009(E) vi ISO 2009 All rights reservedIntroduction This part of ISO 7240 is based on a European standard EN 54-17, prepare
22、d by the European Committee for Standardization CEN/TC 72 “Fire detection and fire alarm systems”. The purpose of short-circuit isolators is to limit the consequences of low-parallel-resistance faults between the lines of a transmission path of a fire detection and alarm system. This is normally ach
23、ieved by connecting the transmission path in a loop configuration, separating sections of the loop with short-circuit isolators and introducing a means of detecting the presence of a fault, if its consequences (e.g. reduction in the line voltage) jeopardizes the correct operation of components on th
24、e transmission path. The faulty section of the loop can then be switched out, between a pair of short-circuit isolators, allowing the rest of the loop to continue to function correctly. It is recognized that it is not possible for this part of ISO 7240 to specify all of the requirements for the func
25、tion of a short-circuit isolator in a system. The requirements for the functioning of a short-circuit isolator are dependent on the system operation, the other components associated with the transmission path (e.g. the control and indicating equipment and detectors) and the transmission path paramet
26、ers (e.g. line impedance and line loads) and it is necessary that they be verified in a system test. However, this part of ISO 7240 includes the following: a requirement for the manufacturer to provide all of the specifications for the short-circuit isolator required by system designers to use the d
27、evice correctly, in accordance with the system requirements; NOTE It is the responsibility of the system designer to ensure that only those short-circuit isolators having the necessary performance are chosen to meet the system design requirements. tests to verify that the short-circuit isolator func
28、tions in accordance with the manufacturers specifications; and tests to verify the performance of the short-circuit isolator in environmental and electromagnetic compatibility (EMC) conditions. Due to the many different concepts that can be used for the operation of short-circuit isolators, it is no
29、t possible to define a precise functional test procedure applicable to all types. Instead, this part of ISO 7240 requires that a functional test procedure be developed to verify the manufacturers specification and lists the most important points that it is necessary to verify. To assist in developin
30、g such test procedures, some example procedures are given in Annex A. With respect to the foregoing, it is important that, in addition to meeting the requirements of this part of ISO 7240, short-circuit isolators are shown to operate correctly within the types of systems with which they are intended
31、 for use. INTERNATIONAL STANDARD ISO 7240-17:2009(E) ISO 2009 All rights reserved 1 Fire detection and fire alarm systems Part 17: Short-circuit isolators 1 Scope This part of ISO 7240 specifies requirements, test methods and performance criteria for short-circuit isolators, for use in fire detectio
32、n and alarm systems for buildings; see ISO 7240-1. Means of isolation or protection incorporated within control and indicating equipment in ISO 7240-1:2005, Figure 1, item B, are not covered by this part of ISO 7240. 2 Normative references The following referenced documents are indispensable for the
33、 application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 209, Aluminium and aluminium alloys Chemical composition ISO 7240-1:2005, Fire detection and alarm system
34、s Part 1: General and definitions IEC 60068-1, Environmental testing Part 1: General and guidance IEC 60068-2-1, Environmental testing Part 2-1: Tests Test A: Cold IEC 60068-2-2, Environmental testing Part 2-2: Tests Test B: Dry heat IEC 60068-2-6, Environmental testing Part 2-6: Tests Test Fc: Vibr
35、ation (sinusoidal) IEC 60068-2-27, Environmental testing Part 2-27: Tests Test Ea and guidance: Shock IEC 60068-2-30, Environmental testing Part 2-30: Tests Test Db: Damp heat, cyclic (12 h + 12 h cycle) IEC 60068-2-42, Environmental testing Part 2-42: Tests Test Kc: Sulphur dioxide test for contact
36、s and connections IEC 60068-2-78, Environmental testing Part 2-78: Tests Test Cab: Damp heat, steady state EN 50130-4:1995, Alarm systems Part 4: Electromagnetic compatibility Product family standard: Immunity requirements for components of fire, intruder and social alarm systems ISO 7240-17:2009(E)
37、 2 ISO 2009 All rights reserved3 Terms and definitions For the purposes of this document, the terms, definitions and symbols given in ISO 7240-1 and the following apply. 3.1 closed condition condition of the short-circuit isolator that allows the normal signals and supply currents to pass through th
38、e short-circuit isolator, i.e. the correct condition for the short-circuit isolator when there is no short circuit 3.2 open condition condition of the short-circuit isolator that prevents the passage of short-circuit currents through the short-circuit isolator, i.e. the correct condition for the sho
39、rt-circuit isolator when it is protecting part of a circuit from the effects of a short circuit 3.3 short-circuit isolator device, which may be connected into a transmission path of a fire detection and fire alarm system, to limit the consequences of low-parallel-resistance faults between the lines
40、of this transmission path NOTE A short-circuit isolating device may be a physically separate device or it may be incorporated into another device apart from the control and indicating equipment, e.g. integrated into a smoke detector or detector base. 3.4 type A device assessed for performance at (55
41、 2) C 3.5 type B device assessed for performance at (70 2) C 4 Requirements 4.1 Compliance In order to comply with this part of ISO 7240, the short-circuit isolator shall meet the requirements of Clause 4, shall be verified by visual inspection or engineering assessment, shall be tested as described
42、 in Clause 5 and shall meet the requirements of the tests. However, for short-circuit isolating devices that are integrated into other devices already covered by an existing part of ISO 7240, the environmental conditioning shall be performed in accordance with that part of ISO 7240. 4.2 Integral sta
43、tus indication If the short-circuit isolator incorporates an integral visual indication of its status, then this indication shall not be red. 4.3 Connection of ancillary devices Where the short-circuit isolator provides for connections to ancillary devices (e.g. remote indicators), open- or short-ci
44、rcuit failures of these connections shall not prevent the correct operation of the short-circuit isolator. ISO 7240-17:2009(E) ISO 2009 All rights reserved 3 4.4 Monitoring of detachable short-circuit isolators If a short-circuit isolating device is detachable (i.e. it is attached to a mounting base
45、), then a means shall be provided for a remote monitoring system (e.g. the control and indicating equipment) to detect the removal of the device from the base, in order to give a fault signal. 4.5 Manufacturers adjustments It shall not be possible to change the manufacturers settings except by speci
46、al means (e.g. the use of a special code or tool) or by breaking or removing a seal. 4.6 On-site adjustments If there is provision for on-site adjustment of the short-circuit isolator, then for each setting the short-circuit isolator shall comply with the requirements of this part of ISO 7240. Acces
47、s to the means of adjustment shall be possible only by the use of a code or special tool. 4.7 Marking Each short-circuit isolator shall be clearly marked with the following information: a) number of this part of ISO 7240 (i.e. ISO 7240-17); b) name or trademark of the manufacturer or supplier; c) mo
48、del designation (type or number); d) type A or type B as appropriate or the maximum operating temperature; e) wiring terminal designations; f) some mark(s) or code(s) (e.g. serial number or batch code), by which the manufacturer can identify, at least, the date or batch and place of manufacture and
49、the version number(s) of any software contained within the short-circuit isolator. For detachable short-circuit isolators, the detachable part shall be marked with a), b), c), d) and f), and the base shall be marked with, at least c) (i.e. its own model designation) and e). Where any marking on the device uses symbols or abbreviations not in common use, these shall be explained in the data supplied with the device. The marking shall be
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