Overview - Arc protection - Auto synchronization - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Petersen Coil control - Grid automation - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Transformer protection - 3 winding - Interconnection protection - Generator protection - Power management/Load shedding - Modification Sales Guideline - REX640 Protection and control - PCL4 - IEC - ANSI - 16.02.2023

REX640 Modification Sales Guideline

Modification Sales is a process that supports change of functionality of a REX640 relay that has been already delivered from the factory. The Modification Sales order offers the same flexibility as the original relay order.

The Modification Sales process is based on the relay serial number. Each relay to be modified is handled individually. This applies to quoting, ordering, delivery and installation of the modification. One relay can be modified several times but the precondition for an additional modification is that the previous modification has been installed to the relay.

Modification Sales is available for the asset owners and their delegated service providers. ABB Service can also perform the necessary modifications even for turnkey deliveries.