Section 2: Protection Functions; 27/59 Phase Under/Over Voltage; Reference; Operate And Reset Level - Siemens Argus 7SR21 Technical Manual

Section 2: Protection Functions

2.1

27/59 Phase Under/Over Voltage

2.1.2

Reference

Parameter
V Setting
s
hyst Hysteresis setting
t Delay setting
d
2.1.3

Operate and Reset Level

Attribute
V Operate level
op
Reset level
Repeatability
Variation
2.1.4

Operate and Reset Time

Attribute
Element basic
t
basicE
operate time
t Operate time following delay
op
Repeatability
Disengaging time
Unrestricted © 2013 Siemens Protection Devices Limited
Overvoltage
Undervoltage
-10 °C to +55 °C
+ 2 Hz £ 5 %
f - 3 Hz to f
nom nom
Overvoltage
Undervoltage
7SR21 & 7SR22 Performance Specification
Value
5, 5.5...199.5, 200 V
0, 0.1... 80.0 %
0.00, 0.01...20.00, 20.50... 100, 101... 1000, 1010...
10000, 10100... 14400 s
Value
100 % Vs, ± 1 % or ±0.25 V
± 1 % or ±0.25 V
= (100 % - hyst) x V
op,
± 1 % or ±0.25 V
= (100 % + hyst) x V
op,
± 1 %
£ 5 %
Value
Switched from 0 to 1.1 x Vs: 73 ms ± 10 ms
Switched from 0 to 2.0 xVs: 63 ms ± 10 ms
1.1 to 0.5 xVs: 58 ms ± 10 ms
, ± 1 % or ± 10 ms
t + t
basic d
± 1 % or ± 10 ms
< 80 ms
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