Siemens Reyrolle 5 7SR5430 Transformer Differential Protection Numerical Relay

Siemens Reyrolle 5 7SR5430 Transformer Differential Protection Numerical Relay

The Siemens Reyrolle 5 7SR5430 is designed for 3-winding transformer differential protection. It belongs to the Reyrolle 7SR54 family and is suitable for applications requiring protection of multi-winding transformers in modern substations.

The device supports multiple current transformer inputs and integrated monitoring, recording, and control functions. It is equipped with standard communication interfaces and is designed for reliable transformer protection.

Siemens Reyrolle 5 7SR5430 Inputs and Outputs

12 CT + 24 BI + 10 BO

Communication

Standard front USB port, rear RS485, and Ethernet interfaces.

Housing

S12 enclosure with withdrawable design.

Product Functions

• Fault recording (analog and digital): Yes
•  Sequence-of-events recorder: Yes
•  Monitoring: Yes
•  Number of parameter sets: 4
•  Parameter set switchover: Yes
•  Circuit breaker test: Yes

Protection Functions

• Three-pole tripping: Yes
•  Synchrocheck (ANSI 25): No
•  Undervoltage protection (ANSI 27): No
•  Directional power monitoring (ANSI 32): No
•  Forward power supervision (ANSI 32F): No
•  Reverse power protection (ANSI 32R): No
•  Undercurrent protection (ANSI 37): Yes
•  Unbalance protection (ANSI 46): Yes
•  Negative sequence overcurrent (ANSI 46): Yes
•  Phase rotation supervision (ANSI 47): No
•  Negative sequence overvoltage (ANSI 47): No
•  Thermal overload protection (ANSI 49): Yes
•  Instantaneous overcurrent (ANSI 50/50N): Yes
•  Switch on to fault (ANSI SOTF): No
•  Arc protection (ANSI AFD): Yes
•  Sensitive earth fault (ANSI 50Ns): No
•  Circuit breaker failure protection (ANSI 50BF): Yes
•  Time delayed overcurrent (ANSI 51/51N): Yes
•  Dynamic response changeover (ANSI 51C): Yes
•  Voltage-dependent overcurrent (ANSI 51V): No

Monitoring Functions

Measured values, fault recording, and event logging are supported.

Applications

Protection of 3-winding transformers in medium- and high-voltage substations.

Benefits

• Integrated monitoring and recording functions
•  Flexible configuration with multiple parameter sets
•  Reliable transformer protection
•  Compact S12 design for panel integration