Specifications

7SR242 Duobias Performance Specification
©2010 Siemens Protection Devices Limited Chapter 3 - Page 6 of 45
1.2 Energising Quantities
1.2.1 Auxiliary Power Supply
Nominal Operating Range
V
AUX
30, 48, 110, 220 VDC 24 to 290 VDC
1.2.1.1 Burden
Attribute Value
Quiescent (typical) 6.0 W
30V DC
Quiescent (back light) 7.0 W
Quiescent (typical) 5.5W
48V DC
Quiescent (back light) 6.5W
Quiescent (typical) 6.5W
110V DC
Quiescent (back light) 7.5W
Quiescent (typical) 7.5W
220V DC
Quiescent (back light) 8.5W
1.2.2 AC Current
Nominal Measuring Range
In
1, 5 A Phase and earth 80 x In
fn
50, 60Hz 47 to 62Hz
Note. 1 A and 5 A nominal inputs are user selectable on each model.
1.2.2.1 Burden
1.2.2.2 T
hermal Withstand
Overload Current
Phase and Earth
Overload Period
1A 5A
Continuous 3.0 xIn
10 minutes 3.5 xIn
5 minutes 4.0 xIn
3 minutes 5.0 xIn
2 minutes 6.0 xIn
3 seconds 57.7A 202A
2 seconds 70.7A 247A
1 second 100A 350A
1 cycle 700A 2500A
Value - Phase and Earth
Attribute
1A 5A
AC Burden  0.1 VA  0.3 VA