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    适用范围:IEC 63093-2, 1st Edition, March 2020 - Ferrite cores – Guidelines on dimensions and the limits of surface irregularities – Part 2: Pot-cores for use in telecommunications, power supply, and filter applications This part of IEC 63093 spec
  • 有效 IEC 62984-1-2020 High-Temperature Secondary Batteries – Part 1: General Requirements

    发布日期: 2020-01 语言: English, French 来源: 新信64体育低调看NBA直播
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    语言:English, French
    适用范围:IEC 62984-1, 1st Edition, 2020 - High-temperature secondary batteries – Part 1: General requirements This part of IEC 62984 specifies general aspects, definitions and tests for high-temperature secondary batteries for mobile and/or stationary
  • 有效 IEC 62932-2-2-2020 Edition 1.0

    发布日期: 2020-02 语言: English 来源: 新信64体育低调看NBA直播
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    有效 IEC 62932-2-2-2020 Edition 1.0
    语言:English
    适用范围:IEC 62932-2-2, 1st Edition, February 2020 - Edition 1.0 This part of IEC 62932 applies to flow battery systems for stationary applications and their installations with a maximum voltage not exceeding 1 500 V DC in compliance with IEC 62932-1. This
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    适用范围:IEC TR 61000-4-40, 1st Edition, March 2020 - Electromagnetic compatibility (EMC) – Part 4-40: Testing and measurement techniques – Digital methods for the measurement of power quantities of modulated or distorted signals This part of IEC
  • 有效 IEC TR 60479-4-2020 Effects Of Current On Human Beings And Livestock – Part 4: Effects Of Lightning Strokes

    发布日期: 2020-02 语言: English 来源: 新信64体育低调看NBA直播
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    适用范围:IEC TR 60479-4, 3rd Edition, February 2020 - Effects of current on human beings and livestock – Part 4: Effects of lightning strokes This part of IEC 60479 summarizes the basic parameters for lightning and its variability insofar as they apply
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    适用范围:Replacement: This Part of IEC 61058 applies to change-over selectors (mechanical or electronic) for appliances actuated by hand, by foot or by other human activity, to operate or control electrical appliances and other equipment for household or similar purposes with a rated voltage not exceeding 480 V and a rated current not exceeding 63 A. These change-over selectors are intended to be operated by a person, via an actuating member or by actuating a sensing unit. The actuating member or sensing unit can be integral with or arranged separately, either physically or electrically, from the switch, and can involve transmission of a signal, for example electrical, optical, acoustic or thermal, between the actuating member or sensing unit and the switch Change-over selectors which incorporate additional control functions governed by the switch function are within the scope of this document. This document also covers the indirect actuation of the switch when the operation of the actuating member or sensing unit is provided by a remote control or a part of an appliance or equipment such as a door NOTE 1 Electronic change-over selectors may can be combined with mechanical change-over selectors giving full disconnection or micro-disconnection NOTE 2 Electronic change-over selectors without a mechanical switch in the supply circuit provide only electronic disconnection. Therefore, the circuit on the load side is always considered to be live NOTE 3 For change-over selectors used in tropical climates, additional requirements can apply NOTE 4 Attention is drawn to the fact that the standards for appliances can contain additional or alternative requirements for change-over selectors. NOTE 5 Throughout this document, the word "appliance" means "appliance or equipment". This document applies to change-over selectors intended to be incorporated in, on, or with an appliance. This document also applies to change-over selectors incorporating electronic devices                    
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    适用范围:IEC 62282-3-400, 1st Edition, November 2016 - Fuel cell technologies - Part 3-400: Stationary fuel cell power systems - Small stationary fuel cell power system with combined heat and power output This part of IEC 62282 applies to small stationary fu
  • 有效 IEC 62793-2016 Protection Against Lightning – Thunderstorm Warning Systems

    发布日期: 2016-05 语言: 英文 来源: 新信64体育低调看NBA直播
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    适用范围:This part of IEC 62600 includes: • definition and specification of the quantities to be determined for characterizing the power quality of a marine energy (wave, tidal and other water current) converter unit; • measurement procedures for quantifying the characteristics of a marine energy (wave, tidal and other water current) converter. The measurement procedures are valid for a single marine energy converter (MEC) unit (or farm) with three-phase grid or an off-grid connection. The measurement procedures are valid for any size of MEC unit, though this document only requires MEC unit types intended for PCC (Point of Common Coupling) at Medium Voltage (MV) or High Voltage (HV) to be tested and characterized. In addition, a simplified measurement and reporting procedure is outlined for MEC units connected at Low Voltage (LV) networks. MV–connected and LV-connected devices are defined as: • MV connected units – typically multiple three-phase MEC units operating as a marine power farm and delivering power through a HV or MV network; • LV connected units – typically single-phase or three-phase units deployed in isolated, hybrid or micro-grid type systems supplying small-scale loads. Considering the nascent status of the marine energy sector, the following limitations of this document are to be recognized: • voltage fluctuations under switching operation – the current revision only considers voltage fluctuations under continuous operation; • resource classifications – to categorize the measured flicker quantities, various resource classes are suggested only as guidelines. The user is advised to use these resource classes judiciously. The measurement procedures are designed to be as non-site-specific as possible so that power quality characteristics measured at a test site, for example, can be considered valid at other sites also providing the same MEC unit configuration and operation modes (for example control parameters). If the configuration or operation mode is changed in any way that might cause the MEC unit to behave differently with respect to power quality, the power quality measurement procedures must be repeated. This document is for testing of wave, tidal and other water current energy converter units, though it contains information that may also be useful for testing of MEC farms. The cases described are not intended for Ocean Thermal Energy Conversion (OTEC) systems. NOTE This document uses the following terms for system voltage: – low voltage (LV) refers to Un <= 1 kV; – medium voltage (MV) refers to 1 kV < Un <= 35 kV; – high voltage (HV) refers to Un > 35 kV.
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    适用范围:This International Standard applies to medical ELECTRONACCELERATORS when used, for therapy purposes, in human medicalpractice. This standard applies to medical ELECTRON ACCELERATORS whichdeliver a RADIATION BEAM of either X-RADIATION or ELECTRONRADIATION with NOMINAL ENERGIES in the range 1 MeV to 50 MeV atmaximum ABSORBED DOSE RATES between 0,001 Gy s–1 and 1Gy s–1 at 1 m from the RADIATION SOURCE and at NORMALTREATMENT DISTANCES between 50 cm and 200 cm from the RADIATIONSOURCE. The present standard describes measurements and test proceduresto be performed by the MANUFACTURER at the design and constructionstage of a medical ELECTRON ACCELERATOR but does not specifyACCEPTANCE TESTS to be performed after installation at thepurchaser's site. The accompanying report, IEC 60977, however, doessuggest that many of the test procedures are appropriate forACCEPTANCE TESTS. The measurement conditions described in the present standarddiffer from those previously in use. This applies particularly tothe PHANTOM position for measurements and the measurement ofdistances from the ISOCENTRE. These new conditions should besubstituted for and not be added to previous methods. This standard specifies test procedures for the determinationand disclosure of functional performance characteristics, knowledgeof which is deemed necessary for proper application and use of amedical ELECTRON ACCELERATOR and which are to be declared in theACCOMPANYING DOCUMENTS together with the greatest deviation orvariation to be expected under specific conditions in NORMAL USE. Aformat for presentation of functional performance values is givenin Annex A. It is recognized that inaccuracies in the test methods must beallowed for when assessing performance. However, it was not felt tobe advisable to combine the errors into an overall performancetolerance but to keep them separate in the expectation that moreaccurate test methods will be evolved. It is not intended that this standard should in any way inhibitthe future development of new designs of equipment which may haveoperating modes and parameters different from those describedherein, provided that such equipment achieves equivalent levels ofperformance for the TREATMENT of PATIENTS. Except where otherwise stated this standard assumes that themedical ELECTRON ACCELERATORS have an ISOCENTRIC GANTRY. Where theequipment is non-isocentric, the description of performance andtest methods may need to be suitably adapted. NOTE A statement of compliance with this standard does notnecessarily imply that these tests will be or have been applied asTYPE TESTS or as individual tests.
  • 有效 IEC 60335-2-44-2012 Household And Similar Electrical Appliances – Safety – Part 2-44: Particular Requirements For Ironers

    发布日期: 2012-01 语言: 英语,法语 来源: 新信64体育低调看NBA直播
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    适用范围:This International Standard deals with the techniques forsampling free gases from gas-collecting relays from powertransformers. Three methods of sampling free gases aredescribed. The techniques for sampling oil from oil-filled equipment suchas power and instrument transformers, reactors, bushings,oil-filled cables and oil-filled tank-type capacitors are no longercovered by this standard, but are instead described in 4.2 of IEC60475:2011. Before analysing the gases dissolved in oil, they are firstextracted from the oil. Three basic methods are described, oneusing extraction by vacuum (Toepler and partial degassing), anotherby displacement of the dissolved gases by bubbling the carrier gasthrough the oil sample (stripping) and the last one by partition ofgases between the oil sample and a small volume of the carrier gas(headspace). The gases are analysed quantitatively after extractionby gas chromatography; a method of analysis is described. Freegases from gas-collecting relays are analysed without preliminarytreatment. The preferred method for assuring the performance of the gasextraction and analysis equipment, considered together as a singlesystem, is to degas samples of oil prepared in the laboratory andcontaining known concentrations of gases ("gas-in-oil standards")and quantitatively analyse the gases extracted. Two methods ofpreparing gas-in-oil standards are described. For daily calibration checks of the chromatograph, it isconvenient to use a standard gas mixture containing a suitableknown amount of each of the gas components to be in a similar ratioto the common ratios of the gases extracted from transformeroils. The techniques described take account, on the one hand, of theproblems peculiar to analyses associated with acceptance testing inthe factory, where gas contents of oil are generally very low and,on the other hand, of the problems imposed by monitoring equipmentin the field, where transport of samples may be by un-pressurizedair freight and where considerable differences in ambienttemperature may exist between the plant and the examininglaboratory.
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    适用范围:This International Standard specifies procedures for on-sitemeasurement of flat-plate photovoltaic (PV) array characteristics,the accompanying meteorological conditions, and use of these fortranslating to standard test conditions (STC) or other selectedconditions. Measurements of PV array current-voltage (I-V)characteristics under actual on-site conditions and theirtranslation to reference test conditions (RTC) can provide: • data for power rating or capacity testing; • verification of installed array power performance relative todesign specifications; • detection of possible differences between on-site modulecharacteristics and laboratory or factory measurements; • detection of possible performance degradation of modules andarrays with respect to onsite initial data; • detection of possible module or array failures or poorperformance. For a particular module, on-site measurements translated to STCcan be directly compared with results previously obtained in alaboratory or factory for that module. Corrections for differencesin the spectral or spatial response of the reference devices mayneed to be assessed as specified in IEC 60904. On-site array measurements are affected by diode, cable, andmismatch losses, soiling and shading, degradation due to aging, andother uncontrolled effects. Therefore, they are not expected to beequal to the product of the number of modules and the respectivemodule data. If a PV array is formed with sub-arrays of different tilt,orientation, technology, or electrical configuration, the procedurespecified in this International Standard is applied to each uniquePV sub-array of interest.
  • 有效 IEC 61243-5-1997 Live Working - Voltage Detectors - Part 5: Voltage Detecting Systems (Vds)

    发布日期: 1997-06 语言: 英语,法语 来源: 新信64体育低调看NBA直播
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    适用范围:Scope and object The purpose of this guide is to establish, in a general way,suitable procedures for commissioning: a) non-reversible hydraulic machines without movablewicket-gates, i.e. storage pumps; b) reversible hydraulic machines with fixed blade impellers andwithout movable wicket-gates, operating as pumps; c) reversible hydraulic machines with fixed blade impellers andwith movable wicket-gates, operating as pumps; d) reversible hydraulic machines with adjustable impellersblades and movable wicket-gates, operating as pumps; and associated equipment. This guide also indicates how such machines and equipment shouldbe operated and maintained. This guide applies to storage pumps and reversible pump-turbinesof all types, especially to large units coupled to electricalmotor-generators. The guide excludes matters of purely commercial interest, exceptthose inextricably bound up with the conduct of commissioning,operation and maintenance. It is understood that a document of this type will be bindingonly if, and to the extent that, both contract parties have agreedupon it. Wherever the guide specifies that documents, drawings orinformation are to be supplied by a manufacturer (or bymanufacturers), each individual manufacturer shall be required tofurnish the appropriate information for his own supply only. The guide is not concerned with water concerned with waterconduits, gates, valves, drainage pumps, cooling water equipment,generators, etc., except where they cannot be separated from themachine and its equipment. It is assumed that the turbine f the set or the pump-turbineoperating as turbine has been commissioned beforehand in accordancewith IEC Publication 545: Guide for commissioning, Operation andMaintenance of Hydraulic Turbines, where applicable. Where this isnot possible, an individual commissioning procedure shall beestablished at an early stage of plan design.
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    适用范围:IEC 80601-2-49, 1st Edition, March 2018 - Medical electrical equipment – Part 2-49: Particular requirements for the basic safety and essential performance of multifunction patient monitors This part of the 80601 International Standard applies
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    适用范围:This International Standard applies to residual current monitorshaving rated voltages not exceeding 440 V a.c. and rated currentsnot exceeding 125 A for household and similar purposes. These devices are intended to monitor the residual current ofthe installation and to give a warning if the residual currentbetween a live part and an exposed conductive part or earth exceedsa predetermined level. RCMs covered by this standard are not intended to be used asprotective devices. RCMs detect residual alternating currents and residual pulsatingdirect currents whether suddenly applied or slowly rising This standard applies to monitors performing simultaneously thefunctions of detection of the residual current, of comparison ofthe value of this current with the residual operating current ofthe device and of providing the prescribed warning signal(s) whenthe residual current exceeds this value. RCMs having internal batteries are not covered by thisstandard. The requirements of this standard apply for normal environmentalconditions. Additional requirements may be necessary for RCMs usedin locations having severe environmental conditions. This standard does not cover Insulation Monitoring Devices(IMDs) which are covered by the scope of IEC 61557-8. NOTE An RCM is distinguished from an IMD in that it is passivein its monitoring function and only responds to an unbalanced faultcurrent in the installation being monitored. An IMD is active inits monitoring and measuring functions in that it can measure thebalanced and unbalanced insulation resistance or impedance in theinstallation
  • 有效 IEC 62642-1-2010 Alarm Systems – Intrusion And Hold-Up Systems – Part 1: System Requirements

    发布日期: 2010-06 语言: English, French 来源: 新信64体育低调看NBA直播
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    适用范围:IEC 62642-1, 1st Edition, June 2010 - Alarm systems – Intrusion and hold-up systems – Part 1: System requirements This part of IEC 62642 specifies the requirements for Intrusionand Hold-up Alarm Systems (I&HAS) installed in buildings
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    适用范围:IEC 62822-1, 1st Edition, March 2016 - Electric welding equipment - Assessment of restrictions related to human exposure to electromagnetic fields (0 Hz to 300 GHz) - Part 1: Product family standard This part of IEC 62822, which is a product family
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    适用范围:IEC 62779-2, 1st Edition, February 2016 - Semiconductor devices – Semiconductor interface for human body communication – Part 2: Characterization of interfacing performances This part of IEC 62779 defines a measurement method on electric
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    适用范围:IEC 60704-2-8, 2nd Edition, March 2020 - Household and similar electrical appliances – Test code for the determination of airborne acoustical noise – Part 2-8: Particular requirements for electric shavers, hair clippers or trimmers Gener
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    适用范围:IEC 61788-7, 3rd Edition, March 2020 - Superconductivity – Part 7: Electronic characteristic measurements – Surface resistance of high‑temperature superconductors at microwave frequencies This part of IEC 61788 describes measuremen
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