Section 2: Protection Functions; Over Fluxing; Reference (24Dt); Operate And Reset Level (24Dt) - Siemens 7SR242 Duobias Technical Manual

Section 2: Protection Functions

2.1

24 Over Fluxing

2.1.1

Reference (24DT)

Parameter
V/f Setting
s
Hyst Hysteresis setting
t Delay setting
d
2.1.2

Operate and Reset Level (24DT)

Attribute
V/f Operate level
op
Reset level
Repeatability
Variation -10 °C to +55 °C
2.1.3

Operate and Reset Time (24DT)

Attribute
t Element basic operate time
basic
t Operate time following delay
op
Repeatability
Disengaging time
2.1.4

Reference (24IT)

Parameter
t Reset setting
reset
2.1.5

Operate and Reset Level (24IT)

Attribute
V/f Operate level
op
Reset level
Repeatability
Variation -10 °C to +55 °C
©2015 Siemens Protection Devices Limited
Chapter 3) 7SR242 Duobias Performance Specification
Value
0.10, 0.11... 2.0 x Nominal Voltage / Nominal Frequency
0, 0.1... 80.0%
0.00, 0.01...20.00, 20.50... 100, 101... 1000, 1010... 10000,
10100... 14400 s
Value
100% x V/f , 2 % or 0.02
s
95% of V/f
op
1 %
5 %
Value
0.9 to 1.1 x V/f : 400 ms
s
0.9 to 2.0 x V/f : 320 ms
s
t + t , 1 % or 200ms
basic d
1 %
< 250ms
Value
0, 1... 1000 s
Value
100% x V/f , 2 % or 0.02
s
95% of V/f
op
1 %
5 %
200ms
200ms
Chapter 3 Page 19 of 50