Siemens Reyrolle 7SR105 Motor Protection Numerical Relay: The Reyrolle 7SR10 Argus overcurrent and earth problem relay is a numerical overcurrent safety relay intended as a low-cost solution for distribution and commercial applications. The particular Reyrolle 7SR105 Argus overcurrent and world fault relay is developed using the latest generation of hardware technology and is available in multiple variants with respect to the power, Binary input/binary result configuration and data communication facility. Located in a 4U high, size 4 non-draw-out case that relays provide safety, monitoring, instrumentation, and metering with built-in input and output logic, data logging, and fault reviews. Communication access to the relay functionality is via a front USB port for local PC connection or rear electric RS485 (optional) port for remote link.

• Numerical protection relay has Universal power supply suited to both AIR CONDITIONING and DC.

• 1A and 5A COMPUTERTOMOGRAFIE selectable at site. Basic communication protocols like MODBUS RTU and IEC 103 available and they are also site selectable. Relays are equipped with a sufficient number of DI/DO i. electronics. upto 6 DI and 6 DO.

• Siemens numerical relay is suitable for current based security and 7SR1004 is available with additional voltage inputs to care for voltage based protections. 7SR1005 is suitable for motor security applications.

PROTECTION FUNCTIONS of Siemens Reyrolle 7SR105 Motor Protection Numerical Relay

• Damaged Conductor, Load Unbalance 

• Negative Phase Sequence Overcurrent 

• Thermal Overload

• Immediate Overcurrent Protection

• Immediate Earth Fault

• Time Delayed Overcurrent Security

• Time Delayed Derived/Measured Earth Fault Security

• Cold Load Pickup

• Circuit Breaker Fall short

• Time Delayed Delicate Earth Fault Safety

• Inrush Restraint

• Immediate Sensitive Earth Problem