IEC 60519-6:2002 pdf download

IEC 60519-6:2002 pdf download.Safety in electroheat installations – Part 6: Specifications for safety in industrial microwave heating equipment
1 Scope
This part of IEC 60519 is applicable to equipment using microwave energy alone or in combination with other kinds of energy for industrial heating of materials. This part is applicable to industrial microwave heating equipment operating in the frequency range 300 MHz to 300 GHz. This part does not apply to appliances for household and similar purposes (covered by IEC 60335-2-25 and IEC 60335-2-90).
2 Normative references
The following referenced documents are indispensable for the 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. IEC 60050(841):1983, International Electrotechnical Vocabulary (IEV) – Chapter 841: Industrial electroheating IEC 60519-1, Safety in electroheat installations – Part 1: General requirements IEC 61307, Industrial microwave heating installations – Test methods for the determination of power output CISPR 11, Industrial, scientific and medical (ISM) radio-frequency equipment – Electro- magnetic disturbance characteristics – Limits and methods of measurement ISO 13849-1:1999, Safety of machinery – Safety-related parts of control systems – Part 1: General principles for design
3 Definitions
For the purpose of this part of IEC 60519, the terms given in IEC 60519-1, IEC 60050(841) as well as the following apply. 3.1 microwave energy generator generator of electromagnetic energy in the frequency range 300 MHz to 300 GHz 3.2 microwave heating equipment assembly of electrical and mechanical devices intended for the transfer of microwave energy to the material to be treated and comprising in general power supplies, generators, applicators, interconnecting cables and wave guides, control circuitry, means for transporting the material and ventilation equipment [IEV 841-07-06, modified] 3.3 material to be treated substance to be heated by the microwave heating equipment 3.4 microwave leakage superficial power density of microwave radiation escaping from the microwave heating equipment 3.5 applicator that portion of the equipment in which the material to be treated is exposed to microwave energy [IEV 841-07-04, modified] 3.6 means of access all structural features of the applicator which can be opened or removed without the use of a tool to provide access to the interior of the applicator 3.7 door all structural features of any part of the equipment which can be opened or removed without the use of tool for provision access, other than to the applicator 3.8 cover structural feature of any part of the equipment which can be opened or removed by the use of a tool to provide access for routine maintenance, service, replacement of expendable parts, etc. 3.9 entrance or exit port permanent aperture of the applicator of continuously fed equipment through which the material to be treated passes on entrance or exit from the applicator 3.10 accessible location point accessible to human contact except the interior of entrance and exit ports NOTE Internal Points of the external surface of an entrance or exit port are deemed inaccessible. 3.11 microwave interlock mechanical or electrical safety device or system, the function of which is to prohibit one class of events if another class of condition does not exists NOTE 1 For example, an interlock prohibits the operation of a microwave generator, if the means of access to the applicator are not closed. All equipment, where accessibility to the applicator by a part of the human body is possible (see 3.10) with a risk of exceeding the admissible microwave leakage limit, shall be provided with protective measures such as doors or barriers with required interlocking (see 3.11). The microwave leakage power density shall not exceed a power density of 50 Wm –2 (5 mWcm –2 ) at any accessible location 0,05 m from any portion of the equipment under conditions designated as “normal operation”. In addition, the microwave leakage shall not exceed a power density of 100 Wm –2 at any accessible location 0,05 m from any portion of the equipment under conditions designated as “abnormal operation”. These levels shall not be exceeded at any point located at distances greater than 0,05 m.