Page 149 - SACE Tmax XT - Catalogue

ACCESSORIES 7/3

The fixed version, which is connected directly to the power system through the circuit-breaker termi-
nals, is recommended for applications in which the need for space can be satisfied by compact prod-
ucts without affecting the performance.
The plug-in version is recommended for applications for which service continuity is a fundamental re-
quirement: the replacement of the moving part with a new one does not require any intervention on the
power supply connections.
The withdrawable version, in addition to the advantages of the plug-in version, offers three different po-
sitions:
• connected: power and auxiliary circuits are connected
• test: power circuits are disconnected, while auxiliary circuits are connected (only for XT5, XT6 and XT7)
• disconnected: both power and auxiliary circuits are disconnected.

Fixed part of plug-in and withdrawable versions
The fixed part of the plug-in/withdrawable versions is available with front terminals (EF), with horizon-
tal rear terminals (HR) or with vertical rear terminals (VR). The terminals are factory mounted in the hor-
izontal position if the code is shared between HR and VR. In this case, it is possible to easily rotate the
terminals into the vertical position. For the XT5 and XT6 circuit-breakers, the fixed part can be fully
pre-engineered in the factory, with the required combination of terminals, by ordering the dedicated
configurable fixed part code and the terminals at the same time.
These fixed parts can be equipped with the same terminals, terminal-covers and phase separator kits
used for the fixed circuit-breakers, using the proper adapter (see the "Power connection" section). For
Tmax XT1, XT2, XT3, XT4 and XT5 400A, the fixed part of a plug-in/withdrawable circuit-breaker can be
installed at two different distances from the back of the panel, according to the picture below. For XT1,
XT2, XT3 and XT4, installation at 50mm is only compulsory in the case where rear horizontal or vertical
terminals (HR/VR) are used.
07

XT1-XT2-XT3-XT4 XT5 400A XT5 630A XT6

Fixing at 50mm Fixing at 50mm Fixing at 50mm Fixing at 50.5mm
Fixing at 70mm Fixing at 72mm