STM PDF

Electromechanical elementary relays - Part 1- General and safety requirements. IEC 61810-1-2015-02(en-fr). Original standard IEC 61810-1-2015 in PDF full version. Additional info + preview on request

Document status: Active

Time relays for industrial and residential use - Part 1- Requirements and tests. IEC 61812-1-2011. Original standard IEC 61812-1-2011 in PDF full version. Additional info + preview on request

Document status: Replaced by St IEC 61812-1-2023

Ultrasonics - Focusing transducers - Definitions and measurement methods for the transmitted fields. Original standard IEC 61828-2001 in PDF full version. Additional info + preview on request

Document status: Replaced by St IEC 61828-2020

Surface mounted piezoelectric devices for frequency control and selection - Standard outlines and terminal lead connections - Part 2- Ceramic enclosures. Original standard IEC 61837-2-2018 in PDF full version. Additional info + preview on request

Document status: Replaced by St IEC 61837-2-2026

Ultrasonics - Pressure pulse lithotripters - Characteristics of fields. IEC 61846-1998. Original standard IEC 61846-1998 in PDF full version. Additional info + preview on request

Document status: Replaced by St IEC 61846-2025

Communication networks and systems for power utility automation - Part 4- System and project management. IEC 61850-4-2011. Original standard IEC 61850-4-2011 in PDF full version. Additional info + preview on request

Document status: Active