General Functionality; Measured-Value Selection - Siemens 7SJ82 Manual

Protection and Automation Functions
6.7 Directional Overcurrent Protection, Ground

General Functionality

6.7.3
6.7.3.1

Measured-Value Selection

Logic
The function provides the option to select between the values IN measured or 3I0 calculated.
[loMasValue-201505-01.vsd, 1, en_US]
Figure 6-63
Both options are only available for the current-transformer connection types 3-phase + IN and 3-phase +
IN-separate. For other connection types respectively, only one option is possible. If you select an option
that is not allowed, an inconsistency message is given.
Depending on the CT secondary rated current, the CT connection type, and the selected setting, the secondary
threshold setting range varies according to the following table.
Table 6-5
Connec- Measured
tion Type Value
3I0 calculated
IN measured
3I0 calculated
IN measured
442
Logic Diagram of Measured-Value Selection
Threshold Setting Range
CT Terminal Type Threshold
Setting Range
(rated I-sec.:
ph = 1 A, IN = 1
A)
4 * Protection 0.030 A to
35.000 A
4 * Measurement 0.001 A to
1.600 A
4 * Protection 0.030 A to
35.000 A
4 * Measurement 0.001 A to
1.600 A
4 * Protection 0.030 A to
35.000 A
3 * Protection, 1 * 0.030 A to
sen. 35.000 A
4 * Measurement 0.001 A to
1.600 A
4 * Protection 0.030 A to
35.000 A
3 * Protection, 1 * 0.001 A to
sen. 1.600 A
4 * Measurement 0.001 A to
1.600 A
Threshold Threshold
Setting Range Setting Range
(rated I-sec.: (rated I-sec.:
ph = 1 A, IN = 5 ph = 5 A, IN = 1
A) A)
N/A N/A
N/A N/A
N/A N/A
N/A N/A
0.030 A to 0.15 A to
35.000 A 175.00 A
0.030 A to 0.15 A to
35.000 A 175.00 A
0.001 A to 0.005 A to
1.600 A 8.000 A
0.15 A to 0.030 A to
175.00 A 35.000 A
0.005 A to 0.001 A to
8.000 A 1.600 A
0.005 A to 0.001 A to
8.000 A 1.600 A
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
Threshold
Setting Range
(rated I-sec.:
ph = 5 A, IN = 5
A)
0.15 A to
175.00 A
0.005 A to
8.000 A
0.15 A to
175.00 A
0.005 A to
8.000 A
0.15 A to
175.00 A
0.15 A to
175.00 A
0.005 A to
8.000 A
0.15 A to
175.00 A
0.005 A to
8.000 A
0.005 A to
8.000 A