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17 METROLOOGIA JA MÕÕTMINE. FÜÜSIKALISED NÄHTUSED

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Uued standardid


EVS-EN IEC 61869-15:2019
Hind 15,40 EUR
Identne IEC 61869-15:2018; EN IEC 61869-15:2019
Mõõtetrafod. Osa 15: Erinõuded alalisvoolu pingetrafodele
IEC 61869-15:2018 provides all requirements specific to voltage transformers to be used in DC applications (DCVTs), whatever the technology used. The output signal can be analogue or digital. It is applicable to newly manufactured voltage transformers used for measuring, protection and/or control applications in DC power systems with a rated voltage above 1,5 kV. This document covers passive voltage dividers as well as active voltage transformers, used for measurement, control and protection. The general configuration of a single-pole low-power instrument transformer is described in Figure 601 of IEC 61869-6:2016. IEC 61869-15:2018 applies to voltage transformers (VT) intended to be used in DC applications with the following functions: • measure DC voltage (with significant harmonics); • withstand DC voltage. Two main technologies of DC converters exist today: LCC and VSC • Line-commutated converters (LCC) are based on thyristor converters. They are characterized by a single direction of current flow, and a voltage polarity reversal possibility. Significant voltage and current harmonics exist up to frequencies of about 3 kHz to 4 kHz. • Voltage source converters (VSC) are based on transistor converters. They are characterized by a bi-directional current flow and a single voltage polarity.  Voltage and current harmonics exist up to frequencies of about 20 kHz.

EVS-EN IEC 61869-14:2019
Hind 16,10 EUR
Identne IEC 61869-14:2018; EN IEC 61869-14:2019
Mõõtetrafod. Osa 14: Erinõuded alalisvoolu voolutrafodele
IEC 61869-14:2018 provides all requirements specific to current transformers to be used in DC applications (DCCTs), whatever the technology used. The output signal can be analogue or digital. It is applicable to newly manufactured current transformers used for measuring, protection and/or control applications in DC power systems with a rated voltage above 1,5 kV. The general configuration of a single-pole low-power instrument transformer is described in Figure 601 of IEC 61869-6:2016. The DCCTs intended for current measurement in the transistor branch of the VSC valve (referred to as CT4a and CT4b in Figure 1403 and Table 1402) are not covered by this document, and will be considered in a future revision. IEC 61869-14:2018 applies to current transformers intended to be used in DC applications with at least one of the following functions: • measure DC current (with significant harmonics); • withstand DC voltage. Depending on the position on the DC system, different kinds of application exist, which are briefly described below, together with the approximate voltage or current wave shape.

EVS-EN IEC 61869-9:2019
Hind 18,00 EUR
Identne IEC 61869-9:2016; EN IEC 61869-9:2019
Mõõtetrafod. Osa 9: Mõõtetrafode digitaalne liides
IEC 61869-9:2016(E) is a product family standard applicable to instrument transformers with digital output. The product standard is composed of IEC 61869-1 and IEC 61869-6, in addition to this standard and the relevant product specific standards in the IEC 61869 series (Part 7, Part 8, Part 12, Part 13, Part 14, and Part 15). This standard defines requirements for digital communications of instrument transformer measurements. It is based on the IEC 61850 series, UCA international users group document Implementation guideline for digital interface to instrument transformers using IEC 61850-9-2, and the relevant parts of IEC 60044-8 that are replaced by this standard. It includes additional improvements including the IEC 61588 network based time synchronization. This first edition replaces the corresponding specific requirements previously contained in IEC 60044-8, published in 2002. This International Standard contains specific requirements for electronic low power instrument transformers (LPIT) having a digital output. However, the reader is encouraged to use its most recent edition. This publication contains an attached file in the form of a .xml file. This file is intended to be used as a complement and does not form an integral part of the publication.

EVS-EN 13032-4:2015+A1:2019
Hind 20,74 EUR
Identne EN 13032-4:2015+A1:2019
Valgus ja valgustus. Lampide ja valgustite fotomeetriliste andmete mõõtmine ja esitamine. Osa 4: Leedlambid, -moodulid ja -valgustid
This European Standard specifies the requirements for measurement of electrical, photometric, and colorimetric quantities of LED lamps, modules, light engines and luminaires, for operation with AC or DC supply voltages, possibly with associated control gear. Photometric and colorimetric quantities covered in this standard include total luminous flux, luminous efficacy, partial luminous flux, luminous intensity distribution, centre-beam intensities, luminance and luminance distribution, chromaticity coordinates, correlated color temperature (CCT), Color Rendering Index (CRI), and spatial uniformity of chromaticity. This standard does not cover LED packages and products based on OLEDs (organic LEDs). NOTE Where the term "LED product, LED device or DUT (device under test)" is used, the term covers LED lamps, modules, light engines or luminaires.

Asendatud või tühistatud standardid


EVS-EN 60044-8:2003
Identne IEC 60044-8:2002; EN 60044-8:2002
Instrument transformers - Part 8: Electronic current transformers
This part of IEC 60044 applies to newly manufactured electronic current transformers having an analogue voltage output or a digital output, for use with electrical measuring instruments and electrical protective devices at nominal frequencies from 15 Hz to 100 Hz.
Keel: Inglise

EVS-EN 13032-4:2015
Identne EN 13032-4:2015
Light and lighting - Measurement and presentation of photometric data of lamps and luminaires - Part 4: LED lamps, modules and luminaires
This European Standard specifies the requirements for measurement of electrical, photometric, and colorimetric quantities of LED lamps, modules, light engines and luminaires, for operation with AC or DC supply voltages, possibly with associated control gear. Photometric and colorimetric quantities covered in this standard include total luminous flux, luminous efficacy, partial luminous flux, luminous intensity distribution, centre-beam intensities, luminance and luminance distribution, chromaticity coordinates, correlated color temperature (CCT), Color Rendering Index (CRI), and spatial uniformity of chromaticity. This standard does not cover LED packages and products based on OLEDs (organic LEDs). NOTE Where the term "LED product, LED device or DUT (device under test)" is used, the term covers LED lamps, modules, light engines or luminaires.
Keel: Inglise

Kavandite arvamusküsitlus


prEN IEC 63045:2019
Identne IEC 63045:201X; prEN IEC 63045:2019
Tähtaeg 16.09.2019
Ultrasonics - Non-focusing and weakly focusing pressure pulse sources - Characteristics of fields
This International Standard is applicable to – therapy equipment using extracorporeally induced non-focused or weakly focused pressure pulses; – therapy equipment producing extracorporeally induced non-focused or weakly focused mechanical energy, where the pressure pulses are released as single events of duration up to 25 microseconds. This International Standard does not apply – to therapy equipment using focused pressure pulse sources and to extracorporeal lithotripsy equipment. – to therapy equipment using other acoustic waveforms like physiotherapy equipment, low intensity ultrasound equipment and HIFU / HITU equipment. This International Standard specifies – measurable parameters which should be used in the declaration of the acoustic output of extracorporeal non-focused or weakly focused pressure pulse sources, – methods of measurement and characterization of the pressure field generated by non-focused or weakly focused pressure pulse equipment. NOTE 1: The parameters defined in this International Standard do not – at the present time – allow quantitative statements to be made about clinical efficacy and possible hazard. In particular, it is not possible to make a statement about the limits for these effects. This particular standard has been developed for equipment intended for use in pressure pulse therapy, e.g. therapy of orthopaedic pain like shoulder pain, tennis elbow pain, heel spur pain, muscular trigger point therapy, lower back pain etc. It is not intended to be used for extracorporeal lithotripsy equipment (as described in IEC 61846), physiotherapy equipment using other waveforms (as described in IEC 61689) and HIFU / HITU equipment (See IEC 60601-2-62 and IEC TR 62649).
Keel: Inglise