Siemens 6MD85, Manual

Page: 636 / 1256

[loMasValue-201507-01.vsd, 1, en_US]
Figure 7-78 Logic Diagram of Measured-Value Selection
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 7-1 Threshold Setting Range
Connec-
tion
Type Measured
Value CT
Terminal
Type Threshold Setting
Range (rated I-sec.:
ph = 1 A, IN = 1 A) Threshold Setting
Range (rated I-sec.:
ph = 1 A, IN = 5 A) Threshold Setting
Range (rated I-sec.:
ph = 5 A, IN = 1 A) Threshold Setting
Range (rated I-sec.:
ph = 5 A, IN = 5 A)
3ph + IN
3I0 calcu-
lated 4 * Protec-
tion 0.010 A to 35.000 A N/A N/A 0.050 A to 175.00 A
4 * Meas-
urement 0.001 A to 1.600 A N/A N/A 0.002 A to 8.000 A
IN meas-
ured 4 * Protec-
tion 0.010 A to 35.000 A N/A N/A 0.050 A to 175.00 A
4 * Meas-
urement 0.001 A to 1.600 A N/A N/A 0.002 A to 8.000 A
3ph + IN-separate
3I0 calcu-
lated 4 * Protec-
tion 0.010 A to 35.000 A 0.010 A to 35.000 A 0.050 A to 175.00 A 0.050 A to 175.00 A
3 * Protec-
tion, 1 *
sen. 0.010 A to 35.000 A 0.010 A to 35.000 A 0.050 A to 175.00 A 0.050 A to 175.00 A
4 * Meas-
urement 0.001 A to 1.600 A 0.001 A to 1.600 A 0.002 A to 8.000 A 0.002 A to 8.000 A
IN meas-
ured 4 * Protec-
tion 0.010 A to 35.000 A 0.050 A to 175.00 A 0.010 A to 35.000 A 0.050 A to 175.00 A
3 * Protec-
tion, 1 *
sen. 0.001 A to 1.600 A 0.002 A to 8.000 A 0.001 A to 1.600 A 0.002 A to 8.000 A
4 * Meas-
urement 0.001 A to 1.600 A 0.002 A to 8.000 A 0.001 A to 1.600 A 0.002 A to 8.000 A
Application and Setting Notes
Parameter:
Measured value
•
Recommended setting value
Measured value
=
IN Measured
This parameter is not available in the basic function.
Parameter Value Description
7.5.3.2
Protection and Automation Functions
7.5 Overcurrent Protection, Ground
636 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017