Connection Principle; Using The Device In The Power Systems Tt And Tn; Standard Application, Examples - Siemens SICAM Q100 7KG95 Series Manual

Commissioning and First Steps

4.12 Connection Principle

4.12 Connection Principle

Using the Device in the Power Systems TT and TN

4.12.1
When using the device in the power systems TT and TN, no special operating conditions must be observed.

Standard Application, Examples

4.12.2
The following input wiring diagrams are examples. Up to the maximum allowable current and voltage values
the device can also be connected without interconnected current and voltage transformers.
Required voltage transformers can be operated in star connection or delta connection.
All input and output terminals that are not needed for measurements remain unwired.
NOTE
i
i
The illustration of the consistent ground connection of the instrument transformers is simplified in the
following connection examples. The secondary windings of the current transformers installed in a high-
voltage power system must be grounded on one side.
!
DANGER
Hazard due to high voltages in the event of a breakdown of the winding insulation
Non-observance will lead to death or serious injury.
Ground the secondary windings of the current transformers on one side. They are installed in a high-
²
voltage power system.
Example: 1-Phase System, No Voltage Transformer
[dw_1-phase-system, 1, en_US]
Figure 4-8
292
Example: 1-Phase System, No Voltage Transformer
SICAM, SICAM Q100 7KG95xx, Manual
E50417-H1040-C522-A8, Edition 09.2020