Section 2: Protection Functions; 27/59 Under/Over Voltage; Reference; Operate And Reset Level - Siemens 7SR224 Technical Manual

Section 2: Protection Functions

2.1

27/59 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
Operate level
V
op
Overvoltage
Reset level
Undervoltage
Repeatability
-10 °C to +55 °C
Variation
f
nom
2.1.4

Operate and Reset Time

Attribute
Element basic
Overvoltage
operate time.
Standard &
Undervoltage
LOV models
t
basicE
Element basic
Overvoltage
operate time.
Single-Triple
Undervoltage
model only
t Operate time following delay
op
Repeatability
Disengaging time
©2010 Siemens Protection Devices Limited
Value
5, 5.5...200V
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 ±0.25V
= (100 % - hyst) x V
= (100 % + hyst) x V
± 1 %
≤ 5 %
+ 2 Hz ≤ 5 %
- 3 Hz to f
nom
Value
0 to 1.1 x Vs: 73 ms ± 10ms
0 to 2.0 xVs: 63 ms ± 10ms
1.1 to 0.5 xVs: 58 ms ± 10ms
0 to 1.1 x Vs: 81 ms ± 10ms
0 to 2.0 xVs: 71 ms ± 10ms
1.1 to 0.5 xVs: 64 ms ± 10ms
t + t
basic
± 1 % or ± 10ms
< 80 ms
7SR224 Argus Performance Specification
± 1 % or 0.25V
op,
± 1 % or 0.25V
op,
, ± 1 % or ± 10ms
d
Chapter 3 Page 16 of 49