Protection Relays:

The protection relay is an intelligent device that receives inputs, compares them, and outputs according to the user’s preferences. Inputs can be current, voltage, resistance or temperature. Outputs can include visual feedback in the form of indicator or display lights, communications, control alerts, power on and off.

In general, protection is essential for power grid operators, electricity providers, and industrial companies in any sector. For over 100 years, Siemens has been providing successful and ever-evolving protection technologies, meaning long-term user satisfaction with its products and services.

Siemens digital protection equipment can be divided into the following groups:

• SIPROTEC Relays 5
• SIPROTEC COMPACT Relays
• SIPROTEC Relays 4
• REYROLLE relays
• Auxiliary Relays