Power; Reference; Operate And Reset Level; Operate And Reset Time - Siemens Argus 7SR21 Technical Manual

2.3

32 Power

2.3.1

Reference

Parameter
Ss 32-n Setting
t 32-n Delay setting
d
2.3.2

Operate and Reset Level

Attribute
S Operate level
op
Reset level
Variation
2.3.3

Operate and Reset Time

Attribute
Element basic
t
basic
operate time
t Operate time following delay
op
Disengaging time
2.3.4

Operate Threshold

Attribute
Minimum levels for
operation
Unrestricted © 2013 Siemens Protection Devices Limited
Over-power
Under-power
-10 °C to +55 °C
+ 2 Hz £ 5 %
f – 3 Hz to f
nom nom
Over-power
Under-power
I
V
7SR21 & 7SR22 Performance Specification
Value
0.05...2 x Sn
0.00 ... 14400 s
Value
100 % Ss, ± 5% or ± 2% Sn
³ 95 % S
op
£ 105 % S
op
£ 5 %
Value
1.1 x Ss: 60 ms ± 10 ms
2.0 x Ss: 45 ms ± 10ms
0.5 x Ss: 30 ms ± 10ms
, ± 1 % or ± 10ms
t + t
basic d
< 40 ms
Value
2.5 % In
2.5% Vn
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