bsen62233-20xxmeasurementmethodsforelectromagneticfieldsofhouseholdappliancesandsimilarappara

bsen62233-20xxmeasurementmethodsforelectromagneticfieldsofhouseholdappliancesandsimilarappara内容摘要：

sure ......................................32 Table – Transfer function with IEEE general public exposure..........................................32 Table Coupling factor ac(r1) ......................................................................................... 33 – 5 – BS EN 62233:2020 INTRODUCTION This standard establishes a suitable evaluation method for determining the electromagic fields in the space around the equipment mentioned in the scope, and defines standardized operating conditions and measuring distances. This document is designed as one method for measurement and assessment of electromagic (EM) fields and their potential effect on the human body by reference to exposure standards. Existing exposure standards, . ICNIRP39。 98 [11]1), IEEE [22] and IEEE [12], present rules for the exposure of humans to EM fields. The simplest and more practical levels [limits] with which to ply are limits (suitably time averaged in some cases) on the electric (E) and magic (B) fields, measured in the absence of the human to be exposed to these fields. These limits are called maximum permissible exposure levels, IEEEbased levels, or reference levels (ICNIRP). Suitable definitions and specified measurement techniques are applied in any exposure pliance measurement or assessment. Compliance with maximum permissible exposure or reference levels is sufficient for positive assessment of meeting these levels as specified in the appropriate exposure standard. This document addresses the additional measurement and calculation techniques which permit determination of pliance under one set of specified circumstance, without reference to time of exposure or actual exposure conditions. This document is not meant to supplant definitions and procedures specified in exposure standards but is aimed at supplementing the procedure already specified for pliance with exposure. ——————— 1) Figures in square brackets refer to the Bibliography. BS EN 62233:2020 – 6 – MEASUREMENT METHODS FOR ELECTROMAGNETIC FIELDS OF HOUSEHOLD APPLIANCES AND SIMILAR APPARATUS WITH REGARD TO HUMAN EXPOSURE 1 Scope This International Standard deals with electromagic fields up to 300 GHz and defines methods for evaluating the electric field strength and magic flux density around household and similar electrical appliances, including the conditions during testing as well as measuring distances and positions. Appliances may incorporate motors, heating elements or their bination, may contain electric or electronic circuitry, and may be powered by the mains, by batteries, or by any other electrical power source. Appliances include such equipment as household electrical appliances, electric tools and electric toys. Appliances not intended for normal household use but which nevertheless may be approached by the public, or may be used by laym en, are within the scope of this standard. This standard does not apply to: – apparatus designed exclusively for heavy industrial purposes。 – apparatus intended to be part of the fixed electrical installation of buildings (such as fuses, circuit breakers, cables and switches)。 – radio and television receivers, audio and video equipment, and electronic music instruments。 – medical electrical appliances。 – personal puters and similar equipment。 – radio transmitters。 – apparatus designed to be used exclusively in vehicles。 The fields of multifunction equipment which is subjected simultaneously to different clauses of this standard and/or other standards shall be assessed using the provisions of each clause/standard for the relevant functions in operation. Abnormal operation of the appliances is not taken into consideration. This standard includes specific elements to assess human exposure: – definition of sensor。 – definition of measuring methods。 – definition of operating mode for appliance under test。 – definition of measuring distance and position. The measurement methods specified are valid from 10 Hz to 400 kHz. In the frequency range above 400 kHz and below 10 Hz appliances in the scope of this standard are deemed to ply without testing unless otherwise specified in IEC 60335 series. }NOTE The methods are not suitable for paring the fields of different applianc es.~ – 7 – BS EN 62233:2020 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 60335 (all parts), Safety of household and similar electrical appliances IEC 61786, Measurement of lowfrequency magic and electric fields with regard to exposure of human beings – Special requirements for instruments and guidance for measurements IEC 62311, Assessment of electronic and electrical equipment related to human exposure restrictions for electromagic fields (0 Hz – 300 GHz)2) CISPR 141, Electromagic patibility – Requirements for household appliances, electric tools and similar apparatus – Part 1: Emission 3 Terms and definitions For the purpose of this standard the following terms and definitions apply. Internationally accepted SIunits are used throughout the standard. Physical quantities and units Quantity Conductivity Symbol  Unit Siemens per metre Dimension S/m Current density J Ampere per square metre A/m2 Electric field strength E Volt p。