Siemens 7SR105 Rho - Performance Specification

7SR105 Rho Performance Specification
© 2018 Siemens Protection Devices Chapter 3 Page 13 of 17
1.4 Performance Specification
This section describes about the settings available for different protection functions and its tolerance limits.
Table 1-19 14 Stall Protection
Number of Elements 4
Setting Range I
s
0.05 to 10xI
n
Time Delay 0.00 to 14400 s
Operate Level 100 % Is ± 5 % or ±1 %xI
n
Operate time
2 x I
s
5 x I
s
35 ms ± 10 ms,
25 ms ± 10 ms
Operate time following delay t
basic
+t
d
, ±1 % or ± 10 ms
Controlled by Stopped, No acceleration, Running, None
Disengaging time < 50 ms
Table 1-20 37 Undercurrent
Number of Elements 2
U/C Guard 0.05 to 5.0xI
n
Setting Range I
s
0.05 to 5.0xI
n
Operate Level 100 % I
s
± 5 % or ± 1 %xI
n
Delay Setting td 0 to 14400 s
Basic Operate Time: -
0.5 x Is 35 ms ± 20 ms
Operate time following delay t
basic
+ t
d
, ± 1 % or ± 10 ms
Overshoot Time < 40 ms
Inhibited by Binary or Virtual Input
Disengaging time < 60 ms