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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4.3.6
IATU and IBTU modules
The line interface modules for analog channel allow the transmission of teleprotection
signals by means of 4 wire connections, for operation by single tone (IATU/IBTU) or dual
tone (IBTU). Figure 23 shows a front view of an analog line interface (IATU or IBTU)
module. As can be seen in the figure, the analog line interface module has a plug-in
connector.
The earth connection of the cable must be connected to the upper fixing screw. Make sure
that the module is completely fixed to the chassis.
Figure 23
Analog
line interface module (IATU or IBTU) connector
The auxiliary relay is configurable from the Management System for command transmission
signalling, command output or alarm and, if be the case, unblocking. In the case of alarm, the
relay will act for one or more of the following causes:
RTC synchronization failure,
Telemeasuring failure, IEC 61850 link failure, Power-supply failure, Main module failure,
Module failure in slot (no.), Manual blocking (analog and digital), Automatic test failure (analog
and digital), Incorrect SIC security identification code (digital), Loss of synchronism (digital),
Incorrect identification code (digital), BER alarm (digital), Remote Alarm Indication (digital
IOCT type), Loss of signal (digital IOCT type), Reception blocking (analog), Error of reception
(analog), Low Signal/Noise ratio (analog), Signal loss (analog), Low guard-signal level/Excess
guard-signal level (analog), MTD alarm (IP interface), CDV alarm (IP interface), CLR alarm (IP
interface), IP link failure (IP interface).