ABB Relion REX640

ABB Relion REX640 is powerful, freely configurable all-in-one protection and control relay for primary distribution. Relion REX640 provides protection and control for a complete range of applications including feeder, line differential, transformer, voltage, busbar, capacitor bank, motor, generator and interconnection protection as well as automatic voltage regulation for on-load tap changers and Petersen coil protection and auto-synchronization. ABB Relion REX640 is designed fully compliant with the IEC/ ANSI and CN standards and offer optimal cyber security, promoting secure connectivity and safeguard our customers’ network. 

ABB Relion REX640 leverages the same configuration software as all ABB Relion protection and control products.  Relion REX640 offers a fully modular hardware and software allowing for high customization and easy adaptation to changing protection requirements throughout the relay life cycle.  Relion REX640 protection relays are available in two different case widths: a narrow case offering five module slots and a standard case offering seven module slots. Software options are identical for both case sizes.