M-3311A

M-3311A Transformer Protection (2, 3, or 4-Winding) Relay

Protect Transformers and Other Important Power System Apparatus.

For Transformers of All Sizes:
- 2, 3 or 4 winding Transformers for Transmission and Distribution applications
- Generator-Transformer Unit Overall Differential
- Unit Protection of Other Electrical Apparatus and certain Bus Arrangements (including those with a transformer in the zone)
Additional Applications:
- System Backup Protection
- Load Shedding (voltage and frequency)
- Bus Protection
- Individual Breaker Failure Protection for each winding input
Available voltage configurations include zero, two or four voltage inputs
Ground Differential configurations include one, two or three current inputs
Optional Ethernet Connection and Expanded I/O
Optional Voltage Package includes:
- 24 Volts/Hz Overexcitation
- 27 Phase Undervoltage
- 59G Ground Overvoltage
- 81O/U Over/Under Frequency