Thytronic NA016, Руководство пользователя

Страница: 48 / 69

INSTALLATION
48 NA016 - Manual - 05 - 2022
6.4 NOMINAL CURRENT I
n
AND I
En
SETTING
CT amperometric phase inputs
Factory default settings:
• Nominal phase current I
n
: 5 A
• Nominal residual current I
En
: 1 A
To modify settings, the dip-switches placed on the front board must be changed (the case must be
open).
The following operations must be performed:
• Remove the auxiliary supply
• Remove the upper tile and open the little door to access the fastening screws.
• Unscrew gradually back to back the four fastening screw in order avoid loss of the internal washer.
• Unmounting of the case from the switchboard is not needed.
• Rotate the MMI module with care to not disconnect the flat cable.
• Avoid touching the printed circuit and connections[1],
Note 1 There are components present which are sensitive to electrostatic discharge.
When the module is removed, it is important to pay particular attention to avoid any accidental contact with the internal components.
In order to avoid the static electricity accumulated in the human body from causing damage, it is recommended to observe the following precautions:
- eliminate any potential differences between the human body and the device by touching the metallic case,
- avoid touching the printed circuit and connections (tracks, component terminals),
- avoid handing the device to others,
- set the programming DIPs by using antistatic tools.
Turn off power supply before opening the case.
CAUTION
Remove-tile.ai
Removing tie to access the fastening screws