Siemens 6MD85, Manual

Page: 1143 / 1256

Stage with Definite-Time Characteristic Curve
Setting Values
Method of measurement Fundamental component
RMS value –
Threshold value 65
For I
rated
= 1 A 0.030 A to 35.000 A Increments of 0.001 A
For I
rated
= 5 A 0.15 A to 175.00 A Increments of 0.01 A
Dropout ratio (fixed) 0.95 –
Time delay 0.00 s to 60.00 s Increments of 0.01 s
Dropout
The greater dropout differential (=
| pickup value – dropout value |
) of the following 2 criteria
applies:
Dropout differential derived from the parameter
Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for overcurrent and of 105 % for undercur-
rent functionality.
Minimum absolute dropout differential
Protection-class current transformer
15 mA sec. (I
rated
= 1 A) or
75 mA sec. (I
rated
= 5 A)
Instrument current transformer 0.5 mA sec. (I
rated
= 1 A) or
2.5 mA sec. (I
rated
= 5 A)
Times
Operate time with time delay = 0 ms
Approx. 15 ms + OOT 66 at 50 Hz
Approx. 14 ms + OOT at 60 Hz
Extension of the operate time during operation with
transformer inrush-current detection Approx. 10 ms
Dropout time Approx. 20 ms + OOT at 50 Hz
Approx. 17 ms + OOT at 60 Hz
Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1 According to specified tolerances
10 Hz ≤ f < 0.9 f
rated
1.1 f
rated
< f ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz Active
Tolerances
Currents, method of measurement = fundamental
component 1 % of the setting value or 5 mA (I
rated
= 1 A)
or 25 mA (I
rated
= 5 A), (f
rated
± 10 %)
11.14
65 If you have selected the method of measurement = RMS value, do not set the threshold value under 0.1 l
rated,sec
.
66 OOT (Output Operating Time): additional delay of the output medium used, see Chapter 11.1.4 Relay Outputs
Technical Data
11.14 Stage with Definite-Time Characteristic Curve
SIPROTEC 5, High-Voltage Bay Controller, Manual 1143
C53000-G5040-C015-9, Edition 11.2017