(33)
DIR 1000587R0002 (Version 02)
3.11. Putting into service and recommendations
3.11.1.
Installation
Circuit-Breakers purchased with the trip unit assembled do not require this operation which is, however, necessary in the case
of replacement.
Comply with the following instructions if the trip unit on the CB is replaced:
1. With the circuit-breaker open and possibly isolated, install the trip unit on the circuit-breaker
2. Power the trip unit with battery unit only
3. If there are no other errors, the display will show the message
Confi guration (confi guration error) accompanied by the yellow
LED coming on permanently (warning)
4. Enter the unit’s “Settings” menu
5. Select
“Circuit-breaker”
6. Select “Unit installation”
7. Input the password
8. Select “Install” and press “ENTER”
9. When the red led fl ashes on and off and the message Installation (installation error) is displayed, remove the battery unit
10. Energize the trip unit from any other source
11. Check for the absence of confi guration errors.
3.11.2.
Uninstalling
To complete the procedure for uninstalling a LSIG-MM unit, follow the steps below:
1. With the circuit-breaker open and/or isolated, power the trip unit with battery unit
2. Enter the unit’s “Settings” menu
3. Select
“Circuit-breaker”
4. Select “Unit installation”
5. Input the password
6. Select “Uninstall” and press “ENTER”
7. Remove the battery unit
8. Remove the LSIG-MM unit from the circuit-breaker
9. The remove the TC connector, proceed as indicated in the fi gure alongside.
The uninstalling
procedure is not strictly necessary for operation but is strongly recommended as it
allows allows circuit-breaker parameters such as contact wear and others that would otherwise be
lost, to be stored. The data in question are then re-transmitted to the new trip unit to be installed in
the same circuit-breaker.
3.11.3. Connections
ATTENTION: For the connections provided by the user, it is recommended that you comply strictly with the
recommendations contained in this document. This will ensure compliance with all the international reference
standards and guarantee that the trip unit functions perfectly even in heavy duty environmental and electromag-
netic conditions.
Pay particular attention to the types of cable, the connections to earth and the maximum distances.
3.11.4.
CS and TC connection test
ATTENTION: If LSIG-MM has been installed by the user, it is important, before closing the CB, to check the last
line on the display when the trip unit is turned on for the fi rst time via battery unit module. No CS and/or TC
disconnected messages must appear; if they do, do not close the circuit-breaker and make the correct connec-
tions.
3.11.5.
Current sensor connection for external neutral
ATTENTION: If you want to connect the current sensor for the external neutral conductor to a three-pole circuit-
IMPORTANT, remember to set I
n
N. accordingly. During this procedure, the circuit-breaker must be open and
preferably isolated.
