17.220.01 电学、磁学综合 标准查询与下载

DIN EN 60909-0 Bb.4:2009 三相交流系统中的短路电流.短路电流计算用电气设备的数据(IEC/TR 60909-2-2008)

Short-circuit currents in three-phase a.c. systems - Data of electrical equipment for short-circuit current calculations (IEC/TR 60909-2:2008)

DIN EN 62428:2009 电力工程.三相交流系统用典型部件.量和变换

Electric power enginering - Modal components in three-phase a.c. systems - Quantities and transformations (IEC 62428:2008); German version EN 62428:2008

BS EN 62428:2008 电力工程.三相交流系统用典型部件.数量和转换

This International Standard deals with transformations from original quantities into modal quantities for the widely used three-phase a.c. systems in the field of electric power engineering. The examination of operating conditions and transient phenomena in three-phase a.c. systems becomes more difficult by the resistive, inductive or capacitive coupling between the phase elements and line conductors. Calculation and description of these phenomena in three-phase a.c. systems are easier if the quantities of the coupled phase elements and line conductors are transformed into modal quantities. The calculation becomes very easy if the transformation leads to decoupled modal systems. The original impedance and admittance matrices are transformed to modal impedance and admittance matrices. In the case of decoupling of the modal quantities, the modal impedance and admittance matrices become diagonal matrices.

Electric power engineering - Modal components in three- phase a. c. systems - Quantities and transformations

SANS 60865-2:2008 短路电流.效果计算.第2部分:计算实例

Covers the application of procedures for the calculation of mechanical and thermal effects due to short circuits as presented in IEC 60865-1 (published in South Africa as an identical adoption under the designation SANS 60865-1) and is an addition to IEC

Short-circuit currents - Calculation of effects Part 2: Examples of calculation

ANSI/ASTM D5568:2008 微波频率下固体材料相对复合电容率和相对导磁率测量用试验方法

Test Method for Measuring Relative Complex Permittivity and Relative Magnetic Permeability of Solid Materials at Microwave Frequencies

DB42/T 399-2006 电力电测技术监督规范

Technical supervision code of electrical measuring

SANS 60865-1:2006 短路电流.效果计算.第1部分:定义及计算方法

Is applicable to the mechanical and thermal effects of short-circuit currents. Contains standardized procedures for the calculation of the effects of the short circuit currents in two sections: the electromagnetic effect on rigid conductors and flexible conductors; the thermal effect on bare conductors and electrical equipment. Only a.c. systems for rated voltages up to and including 420 kV are dealt with.

Short-circuit currents - Calculation of effects Part 1: Definitions and calculation methods

ASTM D7278-06 分析仪样品系统滞后时间的预测标准指南

The analyzer sample system lag time estimated by this guide can be used in conjunction with the analyzer output to aid in optimizing control of blender facilities or process units. The lag time can be used in the tuning of control programs to set the proper optimization frequency. The application of this guide is not for the design of a sample system but to estimate the performance of existing sample systems. The principles listed in this guide are there to help understand design concepts and allow the application of this guide for its intended scope. Additional detailed information can be found in the references provided in the section entitled Additional Reading Material.1.1 This guide covers the application of routine calculations to estimate sample system lag time, in seconds, for gas, liquid, and mixed phase systems.1.2 This guide considers the sources of lag time from the process sample tap, tap conditioning, sample transport, pre-analysis conditioning and analysis.1.3 Lag times are estimated based on a prediction of flow characteristics, turbulent, nonturbulent, or laminar, and the corresponding purge requirements.1.4 Mixed phase systems prevent reliable representative sampling so system lag times should not be used to predict sample representation of the stream.This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Guide for Prediction of Analyzer Sample System Lag Times

ANSI/IEEE 1309:2005 9KHz-40GHz电磁场传感器和探针的校正标准(天线除外)

Provides consensus calibration methods for electromagnetic field sensors and field probes.

Standard for Calibration of Electromagnetic Field Sensors and Probes, Excluding Antennas, from 9 kHz to 40 GHz

IEEE 1309-2005 频率为9KHz～40GHz的电磁场传感器和探头(天线除外)的校准

Provides consensus calibration methods for electromagnetic field sensors and field probes.

Calibration of Electromagnetic Field Sensors and Probes, Excluding Antennas, from 9 kHz to 40 GHz

IEC PAS 62419:2005 控制技术.测量仪器的命名规则

This Publicly Available Specification (PAS) is applicable to measurement techniques. It defines rules for the unambiguous designation of different types of measuring instruments and of measuring instrument features. The scope of this PAS is (a) the adaptation of the designations of measuring instruments and of measuring instrument features to the state of science; (b) the designation of measuring instruments and of measuring instrument features by the measuring quantity or by the measuring task instead of the unit; (c) the avoidance of other secondary components than "...measuring instrument" in compound names at least in the far future in the English language; (d) the avoidance of other secondary components than those corresponding to "measuring instrument" in compound names in languages other than English. In view of this, measuring instruments should not be addressed by the unit of the measured quantity but only by the measured quantity or the measuring task itself. In the compound names of measuring instruments, the use of secondary components ("...gauge", "...meter", "...indicator") other than "...measuring instrument" is inconsistent with the objective of standardization (namely uniformity), especially since the meaning of these secondary components is no more descriptive than that of the standard component or their meaning is already contained in the first element of the compound name (for example, in the case of "water meter"). Therefore, the use of secondary components other than "...measuring instrument" should be avoided in the English language at least in the far future. In addition, the use of secondary components other than those corresponding to "...measuring instrument" should be avoided in languages other than English. Finally, the ambiguous component "...sensor" should not be used. In its place, one of the secondary components "...detector", "...transformer", "...transducer", "...measuring instrument" or "...measuring chain" should be used, depending on the task of the functional unit being named. The definitions for detector (detecting device), transformer, and transducer are given in IEC 60050-351.

Control technology - Rules for the designation of measuring instruments

BS EN 60909-3:2004 三相交流系统中的短路电流 两条独立线路同时对地短路和部分短路电流流入大地时的电流

Short-circuit current calculation in three-phase a.c. systems - Currents during two separate simultaneous single phase line-to- earth short circuits and partial short-circuit currents flowing through earth

LST EN 60375-2004 关于电磁电路的公约（IEC 60375:2003）

Conventions concerning electric and magnetic circuits (IEC 60375:2003)

BS EN 60375:2004 关于电路和磁路的规定

Conventions concerning electric and magnetic circuits

DIN EN 60375:2004 有关电路和磁路的规定

Conventions concerning electric and magnetic circuits (IEC 60375:2003); German version EN 60375:2003

DIN V 42331:2004 脉冲磁场的技术报告

The present Technical Report reviews methods for measuring magnetically hard materials using pulsed field magnetometers.The methods of measurement of the magnetic properties of magnetically hard materials have been specified in IEC 60404-5 for closed magnetic circuits and in IEC 60404-7 for open magnetic circuits. The measurement of the magnetic properties of magnetically hard materials at elevated temperatures is given in Technical Report IEC TR 61807.

Technical Report on Pulsed Field Magnetometry (IEC 62331:2003)

NF C03-005:2004 电路和磁路协议

Conventions concerning electric and magnetic circuits.

VDI/VDE/DGQ/DKD 2622 Blatt 5-2003 电量测量设备的校准 函数发生器

This guideline aims to specify generally application calibration methods for the calibration of measuring instruments for electrical quantities, taking into account economic aspects, in order to create a harmonised, supra-company, basis for the monitoring of testing equipment. This document applies to function generators in the range up to approx. 20 MHz.

Calibration of measurement equipments for electrical quantities - Function generators

BS EN 60375:2003 关于电路和磁路的规定

This International Standard lays down rules for signs and reference directions and reference polarities for electric currents and voltages in electric networks, as well as for the corresponding quantities in magnetic circuits. In Clauses 3 to 9, the time dependence is arbitrary. Clause 10 details the rules and recom-mendations for complex notation.

Conventions concerning electric and magnetic circuits

IEC 60909-3:2003 三相交流系统中的短路电流.第3部分:两个独立的同时对地短路、部分短路电流流入大地情况下的电流

This part of IEC 60909 specifies procedures for calculation of the prospective short-circuit. currents with an unbalanced short circuit in high-voltage three-phase AC systems operating at nominal frequency 50 Hz or 60 Hz, i.e. a) currents during two separate simultaneous line-to-earth short circuits in isolated neutral or resonant earthed neutral systems; b) partial short-circuit currents flowing through earth in case of single line-to-earth short circuit in solidly earthed or low-impedance earthed neutral systems. The currents calculated by these procedures are used when determining induced voltages or touch or step voltages and rise of earth potential at a station (power station or substation). This standard does not cover: a) short-circuit currents deliberately created under controlled conditions as in short-circuit testing stations, or b) short-circuit currents in the electrical installations on board ships or aeroplanes, or c) single line-to-earth faults in isolated or resonant earthed systems. The object of this standard is to establish practical and concise procedures for the calculation of line-to-earth short-circuit currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents through earth from electrical installations, leading to conservative results with sufficient accuracy. For this purpose, the current is determined by considering an equivalent voltage source applied at the short-circuit location with all other sources set to zero. The procedure is suitable for determination by manual methods or digital computation. This standard is an addition to IEC 60909-0. General definitions, symbols and calculation assumptions refer to that publication. Special items only are defined or specified in this document. This does not exclude the use of special methods, for example the superposition method, adjusted to particular circumstances, if they give at least the same precision. As stated in IEC 60909-0, short-circuit currents and their parameters may also be determined by system tests. The calculation of the short-circuit parameters based on the rated data of the electrical equipment and the topological arrangement of the system has the advantage of being possible both for existing systems and for systems at the planning stage.

Short-circuit currents in three-phase a.c. systems - Part 3: Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit currents flowing through earth