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Siemens Reyrolle 7SR1003 Overcurrent Numerical Relay

Siemens Reyrolle 7SR1003 Overcurrent Numerical Relay
Siemens Reyrolle 7SR1003 Overcurrent Numerical Relay
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Product Code : 7SR1003
Brand Name : Siemens
Product Description


Reyrolle 7SR1003 Overcurrent Relay: The Reyrolle 7SR10 Argus overcurrent and earth fault relay is a numerical overcurrent protection relay intended as a low-cost solution for distribution and industrial applications. The Reyrolle 7SR10 Argus overcurrent and earth fault relay is developed using the latest generation of hardware technology and is available in multiple variants depending on the power supply, Binary input/binary output configuration and data communication facility. Housed in a 4U high, size 4 non-draw-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 (optional) port for remote connection.

  • It has Universal power supply suitable for both AC and DC.
  • 1A and 5A CT selectable at site. Basic communication protocol like MODBUS RTU and IEC 103 available and they are also site selectable. Relay are equipped with sufficient number of DI/DO i.e. upto 6 DI and 6 DO.
  • 7SR1003 is designed for current based protection and 7SR1004 is available with additional voltage inputs to take care of voltage based protections. 7SR1005 is designed for motor protection application.

7SR1003: Current based Protection Relay

  • Argus Non-directional overcurrent relay
  • Size 4 molded casing,
  • 4 CT, 10 LEDs, 6 binary inputs/ 6 binary outputs
  • Measuring input: 1/5A, 50/60 Hz
  • Auxiliary voltage: 60 to 240 V AC/DC,
  • binary input tresh. 44 V AC/DC
  • Standard version - no cover
  • Communication: Front port: USB and rear: RS485 supporting IEC 60870-5-103 or Modbus RTU or DNP 3.0
  • Front fascia: w. breaker control pushbuttons
  • Protection function: standard version


  • Broken Conductor, Load Unbalance (46BC)
  • Negative Phase Sequence Overcurrent (46NPS)
  • Thermal Overload (49)
  • Instantaneous Overcurrent Protection (50)
  • Instantaneous Earth Fault (50N/G)
  • Time Delayed Overcurrent Protection (51)
  • Time Delayed Derived/Measured Earth Fault Protection (51N/G)
  • Cold Load Pickup (51C)
  • Circuit Breaker Fail (50BF)
  • Time Delayed Sensitive Earth Fault Protection (51SEF)
  • Inrush Restraint (81HBL2)
  • Instantaneous Sensitive Earth Fault (50SEF)


  • Trip Circuit Supervision (74TC)
  • Total Harmonic Distortion Supervision (81THD)


  • Lockout (86)
  • CB Control

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!


Office No.-9, Plot 53/54, Sector-34, Space Heights, Near Tawa Hotel, Kamothe, Navi Mumbai - 410209, Maharashtra, India
Mr Piyush Lalchand Rathi (Partner)
Mobile :+919819614841, +919769207841
Mr. Dnyanesh Gawande (Partner)
Mobile :+919833686249