Siemens Protection Relay 7SR51

Directional time-overcurrent protection 7SR51 4 curr. trans., 4 volt. trans., 9 BI, 8 BO Standard interface: 1 x USB (front), RS 485 (rear) + 2 x RJ45 interfaces S6 enclosure.
Product Id: 7SR5111-1AA11-0AA0
Brand: Siemens