Microprocessor device for relay protection and automation

Main functions

Protection functions

• Five stages of non-directional overcurrent protection;
• Five stages of non-directional earth-fault protection;
• Protection against unbalanced modes and phase failure (ZOF);
• Acceleration of the overcurrent protection at start-up.

Automation functions

• Automatic reclosing (automatic reclosing);
• Breaker failure protection.

Service functions

• Self-diagnosis of serviceability;
• Memorizing the status of the indication in case of power failure;
• Password protection;
• USB communication port on the front panel;
• Audio-visualization.