Siemens 7SR105 Rho User Manual page 90

Table 1-21
Number of Elements
Setting Range Is
Operate Level
IT Min. Operate Time
DT Delay Setting td
DT Basic Operate Time for NPS -
2 x I
s
5 x I
s
DT Basic Operate Time for magnitude -
2 x I
s
5 x I
s
DT Operate time following delay.
Tm Time Multiplier
Disengaging time
Inhibited by
Table 1-22
Max. No. of Starts
Max. Starts Period
Start Inhibit Delay
Time Between Starts
Table 1-23
Setting Range Itheta
NPS Weighting Factor (K)
TauH Heating Constant
TauS Starting Constant
TauC Cooling Constant
Hot/cold ratio
Operate Level
Operate time
Capacity Alarm Level
Load Alarm Level
Thermal restart inhibit
Inhibited by
© 2018 Siemens Protection Devices
46 Phase Unbalance Protection
48/66 Start Protection
49 Thermal Protection
1 (Magnitude difference or NPS)
0.1 to 0.4 x Itheta
100 % I ± 5 % or ± 1 %xI
s
0 s to 20 s
0 s to 20 s
65 ms ± 10 ms
60 ms ± 10 ms
60 ms ± 10 ms
50 ms ± 10 ms
td ± 1 % or ± 30 ms
0.025 to 2.0
< 80 ms
Binary or Virtual Input
OFF, 1 to 20
1 to 60 min
1 to 60 min
OFF, 1 to 60 min
0.1 to 3.0xI
n
0.1 to 10.0 ∆ 0.1
0.5 to 1000 min, ∆ 0.5 min
0.005 to 1.0 x TauH , ∆ 0.005
1 to 100 x TauH , ∆ 1
OFF, 1 to 100 %, ∆ 1 %
100 % I , ± 5 % or ±1 %xI
s
 H 
 
2 2
I − 1 − I
 
   
EQ p
C
 
τ
t = × In
 
I 2 − I 2
 
EQ θ
 
 
± 5 % or ± 100 ms
(Itheta = 0.3 to 3xI )
n
(1.2 to 20 x Itheta)
User defined
Disabled, 50,51...100 %
OFF, 0.5 to 1.0 x Itheta , ∆ 0.05
20 to 100 %, ∆ 1 %
Binary or Virtual Input
7SR105 Rho Performance Specification
n
n
Chapter 3 Page 14 of 17