Siemens 7SR105 Rho - Page 81

7SR105 Rho Performance Specification
© 2018 Siemens Protection Devices Chapter 3 Page 5 of 17
Table 1-6 Auxiliary Supply
Rated Voltage 24 V to 60 V DC
Tolerance -20 % to +10 %
Allowable super imposed
AC component
15 % of DC voltage
Typical Power
consumption (DC)
< 7 W
Max Interruption time
(Collapse to Zero)
20 ms (24 V DC)
Table 1-7 Binary Inputs
Number 6
Operating Voltage*
19 V DC Range 24 V to 66 V DC
44 V AC/DC Range 44 V to 265 V
Range DC 44 V to 265 V DC
AC 36 V to 265 V AC
Maximum AC/DC current
for operation
3.5 mA
Pick Up Delay User selectable 0 to 14,400,000 ms (up to 4 hours)
Drop Off Delay User selectable 0 to 14,400,000 ms (up to 4 hours)
*Refer to ordering information for more details.
Table 1-8 Binary Outputs
Number 6
4 NO contacts and 2 change over contacts
Operating Voltage Voltage Free
Operating Mode User selectable - Self or Hand/Electrical Reset or pulsed
Operating Time from
energizing Binary Input
< 20 ms
Disengaging time
< 20 ms
Switching Voltage
250 V AC and 250 V DC
Contact current rating:
Continuous
Short time
5 A AC or DC
20 A AC or DC for 0.5 s
30 A AC or DC for 0.2 s
Limiting Making Capacity:
(L/R ≤ 40 ms)
1000 W
Limiting Breaking Capacity:
AC Resistive 1250 VA V/I = 250/5
AC Inductive 250 VA
V/I = 250/1@ p.f. ≤ 0.4
DC Resistive 75 W V/I = 48/1.5; 110/0.7; 220/0.3
DC Inductive
(L/R ≤ 40 ms)
30 W V/I = 48/0.7; 110/0.3; 220/0.14
Mechanical/Electrical
Endurance
10000 operations