7SR105 Rho Performance Specification
© 2018 Siemens Protection Devices Chapter 3 Page 3 of 17
Section 1: Performance Specification
1.1 Indication of Conformity
This product complies with the directive of the Council of the European Communities on the
harmonization of the laws of the Member States relating to electromagnetic compatibility (EMC
Directive 2014/30/EU) and concerning electrical equipment for use within specified voltage limits
(Low Voltage Directive 2014/35/EU) as well as restriction on usage of hazardous substances in
electrical and electronic equipment (RoHS Directive 2011/65/EU).
This conformity has been proved by tests conducted by Siemens AG in accordance of the Council
Directive in accordance with the product standard IEC/EN 60255-26 for the EMC directives, and
with the standard IEC/EN 60255-27 for the low-voltage directive.
RoHS directive 2011/65/EU is met using the standard EN 50581. The device has been designed
and produced for industrial use.
1.2 Technical Specifications
This section provides the technical information of 7SR105 Rho Motor Protection Relay.
Table 1-1 Technical Data Overview
(Auxiliary powered)
Non Draw-out Polycarbonate case (Size 4 standard, Non Draw-out
design), 10 LEDs
(Current)
24 V to 60 V DC
Default front communication port
(IEC 60870-5-103 or MODBUS RTU)
Rear port: RS485 (optional - IEC 60870-5-103 or Modbus RTU or
DNP 3.0)
14, 37, 48/66, 50, 50G/N, 51, 51G/N, 49, 46
functions
74 T/CCS, 86, 50 BCL, 81 B, 46 Ph Rev, 50BF, TEMP
Output
6 BI and 6 BO (2 changeover contact)
Threshold voltage
- 44 V AC/DC with 60 V to 240 V AC/DC power supply version
- 19 V DC with 24 V to 60 V DC power supply version
6 inputs
Measuring Range -50 ºC to +250 ºC
Table 1-2 Mechanical Specifications
Design Flush mounting, Non Draw-out Polycarbonate moulded case
Enclosure IP 54 (front panel)
IP 20 Protection for terminals (rear side)
Depth is 199 mm
Weight 1.6 kgs (appx)
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