A fault current circuit breaker provides protection from fault cur-
rents due to directly or indirectly touching live parts.
Note
In rare cases, customer-side voltage fluctuations on the
machine's power input filter may lead to higher fault currents
than the typical value specified. The main power supply and the
machine must then be separated by an isolating transformer.
Power supply configurations
Power supply configurations
A TN system with grounded star point is the standard power
supply configuration for the connection.
When connecting the machine to a power supply with a
grounded outer conductor, an isolating transformer must be used.
For IT and TT networks, as well as for asymmetrical mains sup-
plies (one phase grounded, corner-grounded delta network), the
machine must be connected via an isolating transformer by the
customer
IT system
A surge diverter is required if the machine is connected to an IT
system.
TRUMPF recommends surge diverters from the following manu-
facturers:
■
Phoenix Contact GmbH & Co. KG, Flachsmarktstrasse 8,
32825 Blomberg, Germany e-mail: [email protected].
■
Dehn+Söhne, PO Box No. 1640, D-92306 Neumarkt, E-mail:
[email protected].
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Electrics - Version 2
B1154en
Fault current circuit breaker
for indirect contact
