The latest IEC/IEEE 62271-37-013 Standard, also called Dual Logo Standard, aims to define and regulate the circuit breakers used to protect these assets.
This part of IEC 62271 is applicable to three-phase AC high-voltage generator circuit-breakers, hereafter called generator circuit-breakers, designed for indoor or outdoor installation and for operation at frequencies of 50 Hz and 60 Hz on systems having voltages above 1 kV and up to 38 kV.
It is applicable to generator circuit-breakers that are installed between the generator and the transformer terminals. Requirements relative to generator circuit-breakers intended for use with generators and transformers rated 10 MVA or more are covered specifically. Generator circuits rated less than 10 MVA and pumped-storage installations are considered special applications, and their requirements are not completely covered by this document.
This document is also applicable to the operating mechanisms of generator circuit-breakers and to their auxiliary equipment.
This paper presents the main characteristics between this latest standards, the previous IEEE C37.013 (now superseded) and the IEC 62271-100 for distribution circuit-breakers, in terms of requirements including short circuit conditions, typical electrical parameters and selectivity logic.
