451 series
The load current passes through the power terminals
"L"
(Line) and " " (Load).
It is essential to observe the identification of these 2 terminals in order to prevent any
incorrect operation.
The
"L"
terminal must be linked to the supply phase.
The other end of the load is connected either to the neutral or to the second phase, according
to the selected configuration (beween phase and neutral or between phases).
This end of the load must also be connected to terminal 8 in the case of the "Partial load
failure" or for the fan-cooled modules (models 453 and 454).
Warning
• The module must be connected to earth via the appropriate
terminal.
• The internal (INam 5 125 A) and external (INom = 150 A)
high speed fuses only protect the thyristors.
The suitable cut-off and installation protection device
must be installed before power-up.
• Fasten the power connections correctly.
Incorrect fastening may cause incorrect operation of the
thyristor unit and serious consequences for the installation.
3-6
451-461 User Manual
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