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Connection Principle
Using the Device in the Power Systems TT and TN
When using the device in the power systemsTT and TN, no special operating conditions must be observed.
Standard Application, Examples
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.
i
i
NOTE
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.
²
Ground the secondary windings of the current transformers on one side. They are installed in a high-
voltage power system.
Example: 1-Phase System, No Voltage Transformer
[dw_1ph_0vol, 1, --_--]
Figure 9-5
Example: 1-Phase System, No Voltage Transformer
9.6
9.6.1
9.6.2
Commissioning and First Steps
9.6 Connection Principle
SICAM, SICAM P850/P855 7KG85X, Manual
199
E50417-H1040-C482-A9, Edition 03.2022
Содержание SICAM 7KG85X
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