Displays and operator controls
8.2 Overcurrent trip unit with LCD display
3VL IEC molded case circuit breakers
118 System Manual, 11/2013, 110 0110 - 02 DS 03
The overcurrent release must be activated before it can be parameterized. A minimum load
current of approximately 20% of the relevant rated current I
n
of the molded case circuit
breaker is required.
-set "LCD-ETU" with the maximum settings for the overload release and the
hort-circuit release must be adapted during commissioning.
Changing the parameters for the overload and short
-circuit releases during operation to a
value below the current operating value causes instantaneous tripping.
If this minimum load current is not available, the required auxiliary power can be supplied
using the 3VL9000-8AP01 hand-held tester. In molded case circuit breakers with
communication capability, the trip unit is supplied with power by the COM20/21 Release 2.
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