7SR105 Rho Performance Specification
© 2018 Siemens Protection Devices Chapter 3 Page 10 of 17
Type Test Reference Parameters Declared Operation
Voltage interruption
(AC/DC auxiliary
supply)
RV = 48 V/220 V DC
RV = 230 V AC
IEC 60255-26
0 % RV at 5 s
Normal Operation
Alternating
component in DC
(Ripple)
DC Power supply
IEC 60255-26
15 % Max and Min
of RV
Duration: 10 min
Normal Operation
1
1
No effect on relay performance
2
Restart with no mal-operation, loss of data or relay damage
Table 1-17 Environmental Test
Type Test Reference Requirement
Climatic Environmental
Test
IEC 60068-2-1,
IEC 60068-2-2,
IEC60255-1
Operating Temperature -10
0
C to + 60
0
C
Storage Range - 25
0
C to + 70
0
C
Humidity
IEC 60068-2-30,
IEC 60068-2-78,
IEC60255-1
Damp heat test, Cyclic
4 days at 40
0
C and 93 % relative humidity
Damp heat test, Steady state
4 days at 95 % RH, +40
0
C
Table 1-18 Product Safety Test
Type Test Reference Parameters Values
Clearances and
Creepage Distances
IEC/EN 60255-27: Edition 2:
2013-10
Clearances and
creepage distances
between external
circuits mutual and to
the enclosure
≥ 4 mm
IP Rating
IEC/EN 60255-27: Edition 2:
2013-10
For Unit Front side IP54
For Unit Rear side IP20
AC Dielectric Voltage
IEC/EN 60255-27: Edition 2:
2013-10
Test voltage (AC): 2 kV
After test, the relay
should be
operative
(Reinforced
Insulation with
communication
circuit)
Test frequency: 50 Hz
Test duration: 1 min
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