For smaller power plants the conventional circuit breaker scheme is prevalent. For larger capacity either Unit scheme or GCB scheme is adopted.For smaller units a cost effective optimized solution is required Hence this question. Please clarify..
The answer is no, because circuit-breakers for generator rated 10 MVA or more, the standard IEC/IEEE 62271-37-013 shall apply.
The complaince to the aforesaid standard is for GCB only. not including MV distribution breakers.
The following is the applicability mentioned in IEC/IEEE 62271-37-013:
"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...."
High Voltage Products
If you want to purchase a product, need any pricing information or need help or support from ABB, please contact your local partner.