Specifications

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Doc. no.
Model
Apparatus
Scale
Page No
1SDH000460R0002
L5439
12.2.9.4. Trip curves for function G
t =
k
I
2
t = k
12.3. Other functions
12.3.1. Indication of the cause of the trip and trip test button
Using the “i Test” button, you can retrieve the information stored in the past 48 hours. You can also perform a trip test by pressing
and holding the button for 7 seconds and an Autotest by pressing and holding the button for 3 seconds, again with the PR030/B
battery unit connected and no current flowing through.
12.4. Putting into service
12.4.1. Connections
WARNING: For the connections provided by the user, it is recommended that you comply strictly with the recom-
mendations contained in this document.
This will enable us to satisfy all the international reference standards and guarantee the perfect operation of the
relay even under severe environmental and electromagnetic conditions. Take particular care with the earthing
connections.
12.4.2. CS and TC connection check
WARNING: If the PR121/P has been installed by the user, it is advisable (with the CB open and Vaux or the
PR030/B) to check the proper connection of the TC and/or CS cables before putting the circuit-breaker into ser-
vice; if this has not been done, make the right connections. If any of the red LEDs come on, this means an error
in the connection of the CS and/or TC. See par. 12.7.1.
12.4.3. Current sensor connection for external neutral
WARNING: If you want to connect the current sensor for the external neutral conductor to a three-pole circuit-
breaker, remember to set I
n
N accordingly (see par. 12.5, ref. 15).
During this procedure, the circuit-breaker must be open and preferably isolated.