Grounding And Connecting Devices; Tightening Torques Of Fastening Screws - Siemens SIPROTEC 5 Operation Manual

Fitting the Devices
3.3 Surface-Mounting Devices with Detached On-Site Operation Panel
Remove the protective film from the battery by simply pulling on the film tab.
²
Push the battery compartment back in again.
²

Grounding and Connecting Devices

3.3.4
Grounding Devices
!
DANGER
Danger due to device being improperly grounded
Incomplete and careless grounding leads to death, severe injury, and considerable material damage!
The device must be situated in the operating area for at least 2 hours before you connect it to the
²
power supply for the first time. This method prevents condensation of water in the device.
If the device has been in storage for more than 2 years, connect it to an auxiliary voltage for 1 to 2
²
days. This will cause the electrolytic capacitors to form on the printed circuit board assemblies again.
² Ground each module with solid low-impedance system grounding (cross-section ≥ 2.5 mm
grounding area ≥ M4).
Connecting Devices
Connect all cables and leads. Use the connection diagrams in the Hardware and Device manuals.
²
Tighten the terminal screws to the prescribed torques.
²

Tightening Torques of Fastening Screws

3.3.5
Tightening Torques for Terminal Screws
Type of Line
Litz wire with ring-type lug
Stranded wires with bootlace ferrules
or pin-type lugs
Solid conductor, bare (2 mm
NOTE
i
i
Make sure that the cables and lines of extra-low voltage circuits are laid sufficiently far away from power
network circuits.
Torques for Other Screw Types
Screw Type
M4 x 20
M4 x 8
M2.5 x 6
Countersunk screw, M2.5 x 6
Countersunk screw, M2.5 x 8
Collar screw, M4 x 20
44
Current Voltage Terminal with
Terminal Spring-Loaded Terminals
2.7 Nm No ring-type lug
2.7 Nm 1.0 Nm
2.0 Nm 1.0 Nm
2 )
Torque
1.2 Nm
1.2 Nm
0.39 Nm
0.39 Nm
0.39 Nm
0.7 Nm
2 (≥ 0.1 in
Voltage Terminal with
Screw Connection
No ring-type lug
0.6 Nm
–
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-7, Edition 06.2016
2 ),