A21R

Features:

The A21R is a traction feeder protection relay designed for AC Traction Overhead Equipment, providing protection, control, and monitoring.
It includes 3-zone distance protection, with independent setting and timer options for each zone, offering up to 30s delay.
Features include under-voltage protection, auto recloser, thermal overload, and backup phase overcurrent protection.
The relay supports IEC60870-5-103 and IEC61850 communication protocols, with SCADA compatibility and Ethernet/RS485 ports.
Software support includes online/offline setting editors, programmable scheme logic editor, and disturbance analysis.

A22R