Siemens 7SR12 Argus - Section 2: Protection Functions; 27;59 Under;Over Voltage; Reference; Operate and Reset Level

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 18 of 56
Section 2: Protection Functions
2.1 27/59 Under/over voltage
2.1.1 Reference
Parameter
Value
V
s
Setting
5, 5.5…200V
hyst
Hysteresis setting 0, 0.1… 80.0%
t
d
Delay setting
0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010…
10000, 10100… 14400 s
2.1.2 Operate and Reset Level
Attribute Value
V
op
Operate level
100 % Vs, ± 1 % or ±0.25V
Reset level
Overvoltage
= (100 % - hyst) x V
op,
± 1 % or ± 0.25V
Undervoltage
= (100 % + hyst) x V
op
± 1 % or ± 0.25V
Repeatability
± 1 %
Variation
-10 °C to +55 °C
≤ 5 %
f
nom
± 5 %
≤ 5 %
2.1.3 Operate and Reset Time
Attribute Value
t
basicE
Element basic
operate time
Overvoltage
0 to 1.1 x Vs: 73 ms, ± 10ms
0 to 2.0 xVs: 63 ms, ± 10ms
Undervoltage
1.1 to 0.5 xVs: 58 ms, ± 10ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10ms
Repeatability
± 1 % or ± 10ms
Disengaging time < 80 ms