Siemens SIPROTEC 4 7XT71 Series, Manual, Page: 90 / 122

Connection
Grounding the Device
!
DANGER
Danger due to high touch voltages
Noncompliance leads to death or severe injury.
²
Work may only be carried out by electrically qualified personnel who are familiar with and observe the
safety requirements and precautions.
²
Do not perform any work in the presence of hazardous voltages.
²
During connection work, completely de-energize the plant (control cabinet, switch panel) where the
device is to be operated.
²
Fix the protective conductor (copper band or conductor) to the lower contact point using an M4 screw.
Make sure that the protective conductor has a low impedance and low inductance.
²
Attach the shielding of the conductors to the upper contact point using an M4 screw.
Connection to the Junction Block
²
Connect the injection unit 7XT71 to the devices to be connected using the screw terminals of the junc-
tion block. Only use copper conductors for this. Consider the markings of the individual connections, the
permissible cross-sections, and the tightening torque while doing this.
i
i
NOTE
Consider the information in chapter 3.2 Connections of the Injection Units 7XT7100 under Screw
Terminals of the Junction Block.
When connecting 2 copper conductors in 1 screw terminal, make sure that both conductors make perma-
nent contact with the screw terminal.
4.4
Assembly and Connection
4.4 Connection
28 SIPROTEC 4/5, Injection unit 7XT71, Manual
C53000-B1174-C128-8, Edition 05.2020