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DIR 1000587R0002 (Version 02)
3.12.2.
In the case of a fault
ATTENTION: If you suspect that the trip unit is faulty, functions incorrectly or has generated an unwanted trip,
you are strongly advised to strictly comply with the following instructions in
Measurements menu
Historicals
Trip:
1. Make a note of the type of protection that has tripped by accessing the LAST TRIP page if there is an external power supply
(24V DC supply or battery) or by pressing “i Test” if in self-powering mode.
2. Record the type of circuit-breaker, number of poles, any accessories connected, In, Serial Number (see par. 14.4) and the SW
version.
3. Prepare a brief description of the opening (what LEDs and/or indications were displayed? when did it happen?, how many
times ?, was it always under the same conditions? what type of load? what voltage? what current? is the event reproducible?)
4. Send/communicate all the information collected, together with the circuit diagram for the circuit-breaker, to your nearest AB
Customer Support service.
The completeness and accuracy of the information given to the Rockwell Auotmation Technical Support will facilitate technical
analysis of the problem encountered, and will allow us to carry out all actions useful for the user rapidly.
ATTENTION: Letting a switch run with a fault that has not been remedied may lead to an apparatus malfunction
or shutdown. Remove the apparatus immediately until it can be inspected or repaired. This situation may lead
to personal injury or property damage.
4.
ACCESSORIES
4.1.
External neutral
This is a current sensor for the external neutral pole of the circuit-breaker, designed to provide neutral protection for three-pole
circuit-breakers. Further details about connection of the external neutral are available in document 1000529R0513.
4.2. Rating
Plug
The rating plug defi nes the rated current In, which is essential for regulating the protections. This is because the
regulation of all the protections refers to In (e.g.: I1= 0.4 xIn).
The rating plug is installed in the trip unit, on a dedicated front connector and is available to the user.
The trip unit can be equipped with various different Rating Plug models, up to value Iu (uninterrupted rated cur-
rent Iu of the CB given on the rating plate of the front guard).
Example: CB 140G-N 800 has Iu= 800 A, and can be fi tted with a rating plug with In
800A.
The module is interchangeable, with the trip unit off and the CB open.
The trip unit continuously checks for the presence of the rating plug and signals its absence or any assembly errors.
ATTENTION: Replacement of the rating plug with the trip unit on or the CB closed could lead to faulty trip unit
operation or undesired opening of the CB
.
4.3. Battery Unit (140G-ELBU)
Battery unit is an external unit allowing the trip unit to be energized so that Installation, Autotest and Trip Test
can be performed, along with verifi cations with the CB open. The unit is connected to the trip unit by means of
the front service connector.
At the end of its life, this equipment should be collected separately from any unsorted municipal waste
