Siemens Reyrolle 5 7SR5711 Motor Protection Numerical Relay

The Siemens Reyrolle 5 7SR5711 is designed for large, medium-voltage motors with advanced protection features. It supports protection, monitoring, and control functions required for industrial motor applications and integrates with substation automation systems.

The device includes multiple current and voltage inputs along with configurable binary inputs and outputs, ensuring flexible protection schemes for motor applications.

Siemens Reyrolle 5 7SR5711 Inputs and Outputs

4 CT + 4 VT + 9 BI + 8 BO

Communication

1 × USB (front), RS485 (rear), and 2 × RJ45 / optical Ethernet ports

Housing

S6 enclosure

Product Functions

• Measured value detection (standard): Yes
•  Logic editor: Yes
•  Fault recording (analog and digital): Yes
•  Sequence-of-events recorder: Yes
•  Monitoring: Yes

Protection Functions

• Three-pole tripping: Yes
•  Locked rotor protection (ANSI 14): Yes
•  Undervoltage protection (ANSI 27): Yes
• Directional power monitoring (ANSI 32): Yes
•  Undercurrent protection (ANSI 37): Yes
•  Unbalance protection (ANSI 46): Yes
•  Negative sequence overcurrent (ANSI 46): Yes
•  Phase rotation supervision (ANSI 47): Yes
•  Blocked rotor monitoring (ANSI 48): Yes
•  Thermal overload protection (ANSI 49): Yes
•  Instantaneous overcurrent (ANSI 50/50N): Yes
•  Arc protection (ANSI AFD): No
•  Sensitive earth fault (ANSI 50Ns): No
•  Circuit breaker failure protection (ANSI 50BF): Yes
•  Directional overcurrent (ANSI 67): Yes
•  Directional earth fault protection (ANSI 67N): Yes
•  Frequency protection (ANSI 81): Yes
•  Lockout (ANSI 86): Yes
•  Restricted earth fault protection (ANSI 87N): Yes
•  External trip: Yes

Supply Voltage

• AC: 100 – 230 V
•  DC: 24 – 250 V
•  Type: AC/DC

Inputs / Outputs

• Digital inputs: up to 9
•  Digital outputs: up to 8
•  Voltage inputs: up to 4
•  Current inputs: up to 4

Communication

• Modbus TCP: Yes
•  IEC 60870-5-103: Yes
•  IEC 61850-8-1: Yes
•  Modbus RTU: Yes
•  DNP3 (serial & TCP): Yes
•  PRP / RSTP / HSR: Yes

Mechanical Design

• Width: 153 mm
•  Height: 177 mm
•  Depth: 217.5 mm
•  Enclosure size: S6

Environmental Conditions

Operating temperature: -10°C to +55°C

Applications

Protection of large MV motors with advanced monitoring and control features

Benefits

• Advanced motor protection functions
•  Flexible configuration with communication support
•  Integrated monitoring and fault recording
•  Compact S6 design suitable for industrial applications