Siemens Reyrolle 7SR17 Rho Relay – 4xI, 0/3xV

The Reyrolle 7SR17 Rho relay is a high-performance numerical relay designed for precise substation and industrial power system protection. Equipped with 4xI and 0/3xV inputs, this Siemens-compatible relay ensures reliable operation and accurate fault detection, making it ideal for high-voltage applications.

Available through trusted suppliers in Mumbai, the 7SR17 Rho offers dependable protection for your substations and industrial installations. Its robust design guarantees consistent performance in demanding electrical environments, helping maintain system stability and prevent costly downtime.

Siemens 7SR17 Relay Protection Functions

• Stall Protection (14)
• Under/Over Voltage (27/59)
• Power/Power Factor (32/55)
• Undercurrent (37)
• Current Unbalance Protection (46)
• Phase Reversal (46Ph Rev)
• Voltage Unbalance (47)
• Start Protection (48/66)
• Motor Thermal Overload (49R)
• Directional Overcurrent (67)
• Directional Earth Fault (67G/67N)
• Backspin Protection (81B)
• Under/Over Frequency (81)
• High Impedance REF (87REF)
• Temperature Inputs (via Comms Port) (RTD)

Siemens 7SR17 Numerical Relay Supervision Functions

• Circuit Breaker Fail (50BF)
• CT Supervision (60CTS)
• VT Supervision (60VTS)
• Trip Circuit Supervision (74T/CCS)

Whether you are upgrading existing protection systems or installing new ones, the Siemens Reyrolle 7SR17 Rho provides a seamless combination of technical precision, reliability, and local availability, making it the preferred choice for engineers, operators, and industrial facilities across Mumbai.