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Communication solutions for power utilities
UNIVERSAL TELEPROTECTION TPU-1
INSTALLATION AND COMMISSIONING MANUAL Web version TPU-1R - Rev. 5.9 (May 2018)
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APPENDIX C
CABINET-MOUNTING TERMINAL BLOCKS
For external connection, the TPU-1 Universal Teleprotection terminal can be supplied, on
demand, with the necessary cabinet-mounting terminal blocks.
A terminal block for cabinet mounting is made up of various terminal blocks mounted on a
metal plate, forming a compact unit. This plate is fixed by means of non-slip nuts to the
vertical guide rails located inside the back wall of the cabinet.
Depending on the composition of the terminal, one or two cabinet-mounting terminal blocks
may be necessary, the space required on the inside back wall of the cabinet being of three
or six standard units in height, respectively.
Protection-side interface modules (IPTU) determine the number of cabinet-mounting
terminal blocks. When the TPU-1 houses from one to four IPTU modules, only one cabinet-
mounting terminal block is required and, when there are more than four IPTU modules, two
cabinet-mounting terminal blocks are necessary.
However, when the TPU-1 terminal is equipped with two line interface modules, and one or
both lines are destined for an analog channel, one of the positions of the IPTU modules
must be used and, in this case, for four IPTU modules, a second cabinet-mounting terminal
block is needed.
The type of terminal block associated with each module is indicated in the next sections.
Examples of different compositions are shown at the end of the Appendix.
The processing module (MWTU) and the optical-fiber line interface module (IOTU), for
example, do not have a terminal block associated. Connections are carried out directly in
the connectors on the front plate of these modules (see Figure 13 and Figure 20,
respectively).