Siemens SENTRON PAC5100, Руководство по эксплуатации устройства, Страница: 87 / 266

6 Connection Principle
6.3 Connection Types and Connection Examples
87 SENTRON PAC5100/5200, 7KM5212/5412, Device Manual
E50417-H1040-C568-A1, Edition 03.2015
6.3 Connection Types and Connection Examples
6.3.1 Using SENTRON PAC5100/5200 in the Power Systems IT, TT, and TN
When using SENTRON PAC5100/5200 in the power systems IT, TT, and TN, no special operating conditions
must be observed.
6.3.2 Connection Types
SENTRON PAC5100/5200 supports the following connection types:
• 1-phase system
• 3-wire network (balanced)
• 3-wire network (unbalanced), 2 current inputs
• 3-wire network (unbalanced), 3 current inputs
• 4-wire network (balanced)
• 4-wire network (unbalanced)
6.3.3 Examples - Standard Application
The following input wiring diagrams are examples. Up to the maximum allowable current and voltage values
(see chapter 13) SENTRON PAC5100/5200 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
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-
voltage power system.