Siemens Reyrolle 7SR105

Siemens Reyrolle 7SR105 Rho motor protection relay is a numerical protection relay intended for use in the motor protection applications. It provides a highly comprehensive functional software package with a range of integral application functions aimed at reducing installation, wiring, and engineering time.The Reyrolle 7SR105 platform is a compact motor protection relay in a Non draw out case with 6BI/Os, Serial interface, RTD inputs with Current based motor protection algorithms – simplest and comprehensive motor protection relay.The device is housed in a 4U high, size 4 non drawn-out case and these relays provide protection, monitoring, instrumentation, and metering with integrated input and output logic, data logging and fault reports. Communication access to the relay functionality is via a front USB port for local PC connection or rear electrical RS485 port for remote connection.A wide range of measured values can be viewed on the front LCD or remotely via the communications channel. The integrated control feature allows the safe operation of a motor and monitoring its start and stop operations.

PROTECTION FUNCTIONS OF SIEMENS REYROLLE 7SR105

• Stall Protection (14)
• Undercurrent (37)
• Current Unbalance Protection (46)
• Phase Reversal (46Ph Rev)
• Start Protection (48/66)
• Motor Thermal Overload (49R)
• Time-overcurrent Protection (50/51)
• Earth Fault (50/51G/N)
• Backspin Protection (81B)
• Temperature Inputs (RTD)

SUPERVISION FUNCTIONS

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

MONITORING FUNCTIONS

• Instrumentation

MAIN FEATURES

• Optional RTD inputs
• Cold Load Settings
• Two Settings Groups
• Password Protection
• Self Monitoring
• Circuit Breaker Trip Counter
• Fault, event and waveform records

The comprehensive range of Reyrolle products provides the total protection requirements of distribution markets and industrial applications – ranging from overcurrent protection via transformer protection and voltage control to a full spectrum of auxiliary and trip relays. The portfolio includes many famous products such as “Argus, “Duobias”, “Solkor”, “Rho, etc. Through successive generations, Reyrolle numerical products have been developed to increase value to system operators. Discover the portfolio!