7SR45 Performance Specification
© 2017 Siemens Protection Devices Limited Chapter 3 Page 3 of 10
Section 1: Performance Specification
1.1 Indication of Conformity
Low Voltage Directive:
2014/35/EU Directive of the European Parliament and of the Council of 26 February 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
electrical equipment designed for use within certain voltage limits; Official Journal of the EU L96,
29/03/2014, p. 357–374 (from 20.04.2016)
EMC Directive:
2014/30/EU Directive of the European Parliament and of the Council of 26 February 2014 on the
harmonisation of the laws of the Member States relating to electromagnetic compatibility; Official
Journal of the EU L96, 29/03/2014, p. 79–106 (from 20.04.2016)
1.2 Technical Specifications
This section provides the technical information of 7SR45 Self Powered Overcurrent and Earth Fault Relay.
Table 1-1 Technical Data Overview
Product Family
(Self powered)
Non Directional Self Powered Overcurrent and Earth Fault Relay
Case and LEDs Non draw-out polycarbonate case (Size 4 standard, Non draw-out
design), 9 fixed function LEDs
Measuring Inputs
(Current)
1 A or 5 A (ordering option), 50 Hz/60 Hz
Communication Front communication port (works with Reydisp Evolution)
Protection Functions 50, 50G/N, 51, 51G/N, 50LC/SOTF
Binary Input and Binary
Output
2 BI and 2 BO
Pulse output 24 V, 0.1 Ws pulse output
Overvoltage Category III
Pollution Degree 2
Table 1-2 Sensitivity
Minimum current for
relay operation
0.20xIn (minimum phase current) in single phase
0.13xIn (minimum phase current) in three phases
Table 1-3 Mechanical Specifications
Design Panel mounting, Non draw-out polycarbonate moulded case
Enclosure IP 52 (front panel)
IP 40 (enclosure sides)
IP 20 (rear side)
Depth is 203 mm
Weight 1.8 kgs (appx)
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