Siemens 6MD85, Manual

Page: 1170 / 1256

Stage with Inverse-Time Characteristic Curve
Setting Values
Reference value for I
2
(I
ref
) Rated object current I
rated,obj.
Positive-sequence current I
1
Pickup value 5.0 % to 999.9 % l
2
/l
ref
Increments of 0.1
Dropout Disk emulation
Instantaneous
Time multiplier 0.05 to 15.00 Increments of 0.01
Release current (minimum
current release) 1 A @ 50 and 100 Irated 0.030 A to 10.000 A Increments of 0.001 A
5 A @ 50 and 100 Irated 0.15 A to 50.00 A Increments of 0.01 A
1 A @ 1.6 Irated 0.001 A to 1.600 A Increments of 0.001 A
5 A @ 1.6 Irated 0.005 A to 8.000 A Increments of 0.001 A
Maximum phase current
(maximum current
limiting) 1 A @ 50 and 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 50 and 100 Irated 0.15 A to 175.00 A Increments of 0.01 A
1 A @ 1.6 Irated 0.001 A to 1.600 A Increments of 0.001 A
5 A @ 1.6 Irated 0.005 A to 8.000 A Increments of 0.001 A
Dropout
The greater dropout differential (=
| pickup value – dropout value |
) of the following 2 criteria
applies:
•
Dropout differential derived from the parameter
Dropout ratio
•
Dropout differential of 3 % of the object rated current
Times
Pickup time
Approx. 40 ms + OOT 85 at 50 Hz
Approx. 35 ms + OOT at 60 Hz
Dropout time Approx. 35 ms + OOT
Dropout Ratio
Disk emulation Approx. 0.90 ⋅ threshold value
Instantaneous Approx. 1.05 ⋅ threshold value
Approx. 0.95 ⋅ pickup value
Operate and Dropout Characteristic Curves
You can select from the following operate and dropout characteristic curves:
Table 11-5 Standard Characteristic Curves to IEC
Normal inverse: type A See chapter 11.8.2 Stage with Inverse-Time Charac-
teristic Curve , Figure 11-1
Very inverse: type B
Extremely inverse: type C
See chapter 11.8.2 Stage with Inverse-Time Charac-
teristic Curve , Figure 11-2
Long-time inverse: type B
11.30
85 OOT (Output Operating Time): additional delay of the output medium used, see chapter 11.1.4 Relay Outputs
Technical Data
11.30 Stage with Inverse-Time Characteristic Curve
1170 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017