CSA C22 2 NO 204-M1984-1984 Line Isolation Monitors (First Edition).pdf

1、C22.2 No. 204-M1984(reaffirmed 2013)Line isolation monitorsLegal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers rep

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13、is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights

14、 is entirely their own responsibility.Authorized use of this documentThis document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to do only the following:If this document is in electronic form:sLOADTHISDOCUMENTONTOACOMPUTERFORTH

15、ESOLEPURPOSEOFREVIEWINGITsSEARCHANDBROWSETHISDOCUMENTANDsPRINTTHISDOCUMENTIFITISIN0$ however, a system including such a device and supervised by one or more responsible, informed persons affords the maximum probability that defective equipment will be disconnected before it causes injury. The Standa

16、rd therefore responds to considerations such as the risk that the device itself will become incapable of performing its intended function, and the risk that the need to silence an audible alarm in special circumstances will result in failure to determine and deal with a cause of alarm. The line isol

17、ation monitors covered in this Standard are of a kind that are programmed to measure, periodically or continuously, an impedance to ground of each “side“ of a single-phase isolated power supply, together with the connected utilization equipment, and to activate an alarm whenever either or both of th

18、ese impedances are equal to or less than a predetermined level. The requirements of CSA Standard Z32.1 both the 1970 edition and that which is now being prepared and of ULC Standard 1022 (July, 1979) were taken into account during the preparation of this Standard. This Standard was prepared under th

19、e jurisdiction of the Standards Steering Committee on Canadian Electrical Code, Part II, and was approved by this Committee and the Technical Committee on Industrial Products. April, 1984 Note: Although the intended primary application of this Standard is stated in its Scope, it is important to note

20、 that it remains the responsibility of the user of the Standard to judge its suitability for his or her particular purpose. CSA Standards are subject to periodical review and suggestions for their improvement will be referred to the appropriate committee. All enquiries regarding this Standard, inclu

21、ding requests for interpretation, should be addressed to Canadian Standards Association, Standards Division, 178 Rexdale Boulevard, Rexdale (Toronto), Ontario M9W 1R3. Requests for interpretation should (a) define the problem, making reference to a specific Clause, and, where appropriate, include an

22、 illustrative sketch; (b) provide an explanation of circumstances surrounding the actual field condition; and (c) be phrased, where possible, to permit a specific “yes“ or “no“ answer. Interpretations are published in “CSA In formation Update“. For subscription details and a free sample copy, write

23、to CSA In formation Centre or telephone (416) 747-4058. Line Isolation Monitors priI, 1984 7 Foreword Foreword The Canadian Standards Association provides certification services for manufacturers who, under license from CSA, wish to use the appropriate registered CSA Marks on certain products of the

24、ir manufacture to indicate conformity with CSA Standards. CSA Certification for a number of products is provided in the interest of maintaining agreed-upon standards of quality, performance, interchangeability and/or safety, as appropriate. Where applicable, certification may form the basis for acce

25、ptance by inspection authorities responsible for enforcement of regulations. Where feasible, programs will be developed for additional products for which certification is desired by producers, consumers or other interests. In performing its functions in accordance with its objectives, CSA does not a

26、ssume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of the Association represent its professional judgement given with due consideration to the necessary limitations of practical operation and state of the art at the time the Standard

27、is processed. Products in substantial accord with this Standard but which exhibit a minor difference or a new feature may be deemed to meet the Standard providing the feature or difference is found acceptable utilizing appropriate CSA Certification Division Operating Procedures. Products which compl

28、y with this Standard shall not be certified if they are found to have additional features which are inconsistent with the intent of this Standard. Products shall not be certifiable if they are discovered to contravene applicable laws or regulations. Testing techniques, test procedures and instrument

29、ation frequently must be prescribed by the CSA Certification Division in addition to the technical requirements contained in Standards of CSA. In addition to markings specified in the Standard the CSA Certification Division may require special cautions, markings and instructions that are not specifi

30、ed by the Standard. Some tests required by CSA Standards may be inherently hazardous. The Association neither assumes nor accepts any responsibility for any injury or damage that may occur during or as the result of tests, wherever performed, whether performed in whole or in part by the manufacturer

31、 or the Association, and whether or not any equipment, facility or personnel for or in connection with the test is furnished by the manufacturer or the Association. Manufacturers should note that, in the event of the failure of the CSA Certification Division to resolve an issue arising from the inte

32、rpretation of requirements, there is an appeal procedure: the complainant should submit the matter, in writing, to the Secretary of the Canadian Standards Association. If this Standard is to be used in obtaining CSA Certification please remember, when making application for certification, to request

33、 all current Amendments, Bulletins, Notices and Technical Information Letters that may be applicable and for which there may be a nominal charge. For such information or for further information concerning details about CSA Certification please address your inquiry to the Applications and Records Sec

34、tion, Canadian Standards Association, 178 Rexdale Boulevard, Rexdale (Toronto), Ontario M9W 1 R3. Publication DateApril 30, 1984 (ie, the date on or after which this Standard may, at the discretion of the applicant, be used for certification). Effective DateOctober 31, 1985* (le, the date on which t

35、his Standard shall be applicable to equipment being submitted for certification and to equipment already certified and manufactured on or after that date). * Unless otherwise noted in the text or General lnstrucfion. C22.2 No. 204-M1984 8 April. 1984 ScopeDefinitions C22.2 No. 204-M1984 Line Isolati

36、on Monitors 1. Scope 1.1 This Standard applies to line isolation monitors designed to be installed and used as an ancillary part of a single-phase isolated (ungrounded) power distribution system not exceeding 300 V in accordance with the rules of the CE Code, Part I, including any rules that are app

37、licable particularly to anaesthetizing locations and other patient care areas in hospitals and other health care facilities. 1.2 This Standard applies to all line isolation monitors and includes requirements for the encJosure in which they are mounted for installation. 1.3 This Standard applies to m

38、onitors of a kind that are programmed to measure, periodically or continuously, an impedance to ground of each side“ of a single-phase power supply and any connected load and to activate an alarm whenever either or both of these impedances are equal to or less than a preset limit. 1.4 This Standard

39、also applies to remote indicators designed to duplicate some or all of the alarm indications that are presented by a line isolation monitor. 1.5 This Standard does not include requirements for monitors for installations in hazardous locations, as Part I of the CE Code does not provide for their inst

40、allation in such locations. 2. Definitions 2.1 The following definitions apply in this Standard: Anaesthetizing location means any area of a hospital that is designated for the administration of any flammable or nonflammable inhalation anaesthetic agent to a person in the course of an examination or

41、 treatment. Note: While injectable anaesthetics and local anaesthetics may be administered in an anaesthetizing location, their use does not establish the classification of the area. Hazard index means, for a given set of conditions in an isolated power system, the current (in milliamperes), compose

42、d of resistive and capacitive leakage and fault currents, that would flow through a connection of negligible impedance between either isolated conductor and ground. Note: The hazard index with one isolated conductor connected to ground is not necessarily the same as the hazard index with the other i

43、solated conductor connected to ground; of the two the higher hazard index governs. Fault hazard index means the hazard index of a isolated system with all equipment connected except the line given isolation monitor. Monitor hazard index means the hazard index of the line isolation monitor alone. Lin

44、e Isolation Monitors April. 1984 9 DefinitionsGeneral RequirementsReference Publications Total hazard index means the hazard index of a given isolated system with all equipment, including the line isolation monitor, connected. Hospital means an institution where patients are accommodated on the basi

45、s of medical need and are provided with continuing medical care and supporting diagnostic and therapeutic services. Line isolation monitor means a device that measures and displays the greater of the two total hazard indices of an isolated electrical system, and provides warning when the index reach

46、es a preset limit. Patient care area means an area intended primarily for the provision of diagnosis, treatment, or care. Remote indicator means a device intended to be installed in a location remote from that of a line isolation monitor and to duplicate some or all of the alarm indications presente

47、d by the monitors. Shock hazard means a hazard considered to exist at any exposed part if the available open-circuit voltage is more than 42.4 V peak and the available current through a 1500 (1 resistance is more than 5 mA (see CSA Standard C22.2 No. 151). 3. General Requirements 3.1 Reference Publi

48、cations 3.1.1 Where reference is made to CSA Standards of the Canadian Electrical Code, Parts I and II, such reference shall be considered to refer to the latest edition and revision thereto, unless otherwise specified. This Standard refers to the following such Standards and the year dates shown in

49、dicate the latest editions available at the time of printing: CSA Standards C22.1-1 982, Canadian Electrical Code, Part I; C22.2 No. 0-M1982, General RequirementsCanadian Electrical Code, Part II; C22.2 No. 0.4-M 1982, Bonding and Grounding of Electrical Equipment (Protective Grounding); C22.2 No. 14-1973, Industrial Control Equipment for Use in Ordinary (Non-Hazardous Locations); C22.2 No. 16-1980, In