Standardization Efforts of International Electrotechnical Commission Related to Surge Protection Components, and Receipt of METI Minister’s Award

摘要

An International Electrotechnical Commission (IEC) international standard for surge isolation trans-formers (SITs) for communications use has been established based on a proposal from Japan. SITs are components featuring high insulation-breakdown voltage and impedance. They reduce lightning surges to a small voltage level so there is no effect on protected equipment, while simultaneously blocking a common mode noise loop. They provide excellent protection for the DC (direct current) SELV (safety extra-low voltage) circuit on the secondary side in information and communication technology equip-ment. This article introduces international standardization activities related to SITs at IEC and discusses associated technology.