User's Manual

Siemens PLT 130
.
1994
4/17
Overvoltage protection
Configuring notes and ordering data
AF Connector board ”Remote bus” GS Coarse overvoltage protection Cable lengths: a < 25 m
ES Grounding rail IK Inhouse cable b 25 to 50 m
FE Foundation earth PA Equipotential bonding c < 50 m
FK Standard remote bus cable T Participant
FS Fine overvoltage protection
Fig. 4/25 Application of coarse and fine overvoltage protection components with differ ent lengths of cable
Configuring notes
The coarse overvoltage protection must be provided for all re-
mote bus cables prior to their exit points from the building and
also in the immediate vicinity of the foundation earth connection.
The connection between the coarse protection and the founda-
tion earth must be kept as short as possible.
The coarse protection is also recommended if the remote bus
connects cabinet groups which are positioned more than 50 m
from one another within a building. In this case the coarse
protection must be installed directly next to the last participant
before the longer inhouse cable, and connected to the potential
earth of the cabinet.
The fine protection must be provided for each bus participant
which is directly connected to a coarse protection component.
Fine protection is required for both participants if the distance
between the bus participants is > 25 m.
The cable clamps for the various types of remote bus cable are
included in the delivery of the overvoltage protection.
Ordering data
Order No.
Coarse overvoltage protection
for the CS 275 bus system
6DS9 208-8AA
Fine overvoltage protection
for the CS 275 bus system
6DS9 210-8AA
For further information refer to: Order No.
”TELEPERM M, instructions and
guidelines for planning, installation and operation”
German C79000-G8000-C417
English C79000-G8076-C417
Created with "Chameleon CMYK PDF Creator" for Wolfgang Strozyk at Siemens AG
This catalog is out of date, see note on page 2