微信公众号随时随地查标准

QQ交流1群(已满)

QQ群标准在线咨询2

QQ交流2群

购买标准后,可去我的标准下载或阅读

定价: 605元 / 折扣价: 515

在线阅读 收 藏

定价: 345元 / 折扣价: 294

在线阅读 收 藏

定价: 0元 / 折扣价: 0 加购物车

在线阅读 收 藏

定价: 819元 / 折扣价: 697 加购物车

在线阅读 收 藏

定价: 515元 / 折扣价: 438 加购物车

在线阅读 收 藏
ASTM B830-18 Standard Specification for Uniform Test Methods and Frequency Active 发布日期 :  1970-01-01 实施日期 : 

定价: 515元 / 折扣价: 438 加购物车

在线阅读 收 藏

定价: 0元 / 折扣价: 0 加购物车

在线阅读 收 藏

4.1 This test method is designed for testing of either toroidal or mated soft magnetic core components over a range of temperatures, frequencies, and flux densities.4.2 The reproducibility and repeatability of this test method are such that it is suitable for design, specification acceptance, service evaluation, and research and development.1.1 This test method covers the equipment, procedures, and measurement of core loss of either toroidal or mated soft magnetic core components, such as soft ferrite cores, iron powder cores, and so forth, over ranges of controlled ambient temperatures typically from −20 to +120°C, frequencies from 10 kHz to 1 MHz, under sinusoidal flux conditions.1.2 The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this test method, SI units are shown in brackets except for the sections concerning calculations where there are separate sections for the respective unit systems. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this standard.1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价: 590元 / 折扣价: 502 加购物车

在线阅读 收 藏

CSA Preface This is the first edition of CAN/CSA-C61000-2-12, Electromagnetic compatibility (EMC) - Part 2-12: Environment - Compatibility levels for low-frequency conducted disturbances and signalling in public medium-voltage power supply systems, whi

定价: 1001元 / 折扣价: 851

在线阅读 收 藏
94 条记录,每页 15 条,当前第 1 / 7 页 第一页 | 上一页 | 下一页 | 最末页  |     转到第   页