Hello, You might use clause 2.4 of IEC950 or clause or clause 6.3.1.2 of IEC1010 depending what standard is valid for your equipment. LIMITED CURRENT CIRCIUT. In this way you should be able to avoid the use of transformer or optocoupler.
This enables you to measure on AC (primary) and connect to the measurement circuit. Please read also 2.2.8.2 IEC950 as a guideline, how you could bridge reinforced isolation Primary to SELV by resistors !! regards Horst ********************************************************************* Dipl.-Ing. (FH) Horst Haug INTERTest Systems GmbH Produktsicherheit Sudetenstr. 5 Product-Safety D - 87600 Kaufbeuren Tel. : +49 8341/91-5051 FAX : +49 8341/91-5059 E-Mail: ho...@it-kf.mhs.compuserve.com WWW : http://ourworld.compuserve.com/homepages/intertest_germany *********************************************************************
