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Siemens Reyrolle 7SR54 Transformer Protection Relay
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Technical Specifications
Inputs/Outputs:
• 8 CT + 16 BI + 8 BO
• 8 CT + 4 VT + 12 BI + 8 BO
• 8 CT + 4 VT + 37 BI + 18 BO
• 12 CT + 24 BI + 10 BO
• 12 CT + 4 VT + 35 BI + 16 BO
Protection Functions: Differential, overcurrent, restricted earth fault, over/undervoltage, overexcitation, thermal overload, breaker failure, frequency, inrush detection, and lockout.
Display: 128×128 backlit LCD with user-friendly interface and programmable LEDs.
Housing: Withdrawable relay design for easy maintenance.
Communication: IEC 61850, Modbus, DNP3, and IEC 60870-5-103 compatible.
Applications: Transformer and reactor protection in substations, power plants, and industrial systems
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