SWT 3000 Equipment Manual CLE Module
© SIEMENS AG 2008 Edition p3_3_x 08/09 Page - 3
Description of operation
The CLE module (copper line equipment) provides the interface between an SWT 3000 unit op-
erated as a stand-alone unit and a copper transmission line. The teleprotection signal is transmitted
in the VF range from 300-4000 Hz. The following equipment configurations are possible:
z Connection of two SWT 3000 stand-alone units each containing one CLE module.
z Connection of an SWT 3000 stand-alone unit to an ESB 2000i unit. The SWT 3000
unit contains a CLE module as interface and the ESB 2000i unit an NFD module.
The S6 control wire for modules CLE and NFD makes alternate multi-purpose opera-
tion possible (AMP).
The CLE module contains two independent circuit sections:
z A transmit amplifier
z A receive filter
The CLE is connected to the PU3 module in the SWT 3000 unit. This module generates the VF
signal to be transmitted which is fed onto the transmission line by the transmit amplifier of the CLE.
In the opposite direction the VF signal is forwarded from the transmission route to the PU3 via the
receive filter.
The CLE does not have any control elements but three alarm displays and two test sockets on the
front panel. The CLE module does not generate any alarms but displays alarms generated by the
PU3.
4000 Hz
300 Hz
Inhibit
EAL
S/N
PU3
NF
S6
PON_PU
PU3
Prot.
NF
MW
SAL
Prot.
SAL Transmit alarm S/N S/N alarm MW Measuring transformer
EAL Receive alarm Prot. Protection circuit S6 Control wire for alternate multi-
purpose op.
Figure 1: Block diagram of the CLE module
To Next Page
Loading...
Need help?
General
