L3692
Tmax T8
7/39
Doc N°
Mod.
Apparatus
Scale
Page N°
1SDH000682R0002
L3885
L5757
F
ES
VR/HR
VR
VR
5. Electrical
connections
5.1 Power circuit connections
Use insulated bars/ perform specifi c type tests on the installation.
5.1.1
Shapes of the terminals
Fig. 9
Note
The drawings provide a schematic illustration of the type of terminal. The exact shape of the terminals is given in the chapter entitled “Overall
dimensions". The terminals installed on the upper and lower parts (input and output) can be different from each other.
Front terminals
(IEC/UL)
5.1.2. Examples of connection busbar layouts depending on the types of terminals
The busbars allow connections to be made between the terminals of the circuit-breaker and the busbars of the switchboard. They must be ac-
curately sized by the switchboard design engineer.
This section illustrates examples of possible constructions, depending on the shape and size of the circuit-breaker terminals.
It is normally advisable to use the entire contact surface of the terminal, thus the width of the busbar should be the same as that of the terminal.
Different capacities can be obtained for the connections by adjusting the thickness and number of busbars in parallel. In certain cases, reductions
in the width of the connection in relation to that of the terminal can be allowed, as shown in the examples below.
Front
terminals
Vertical rear terminals
Circuit-breaker
Iu [A]
Busbar cross-section
Busbar cross-section
[mm
2
]/[in
2
]
[mm
2
]/[in
2
]
T8 V
1600
3x(100x5) / 3x(3.94x0.2)
3x(100x5) / 3x(3.94x0.2)
T8 L-V
2000
3x(100x5) / 3x(3.94x0.2)
3x(100x5) / 3x(3.94x0.2)
T8 L-V
2500
4x(100x5) / 4x(3.94x0.2)
4x(100x5) / 4x(3.94x0.2)
T8 V
3000
-
6x(100x5) / 6x(3.94x0.2)
T8 L-V
3200
-
6x(100x5) / 6x(3.94x0.2)
Fig. 10
Extended front
terminals (IEC)
Adjustable rear termi-
nals for fl at bar ( VR for
IEC/UL; HR for IEC)
Vertical rear ter-
minals (IEC)
Vertical rear
terminals (UL)
