ABB Sace Emax 2 Installation, Operation And Maintenance Instructions page 27

Connection to the power
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A circuit-breaker is connected to the power circuit using the connection busbars of the switchboard fixed
to the circuit-breaker terminals.
circuit
Emax 2 circuit-breakers are tested in accordance with standards IEC 60947.2-3 and UL 1066.
The switchboard designer is responsible for busbar sizing, which must be validated by application of the
tests provided for by the pertinent standards.
Figure 64
IMPORTANT: it is possible to obtain different capacities for the connections by altering
the thickness and number of busbars in parallel.
The following tables provide some examples of the quantity and the sizes of the connections that can be
used for each type of circuit-breaker:
circuit-breaker IEC
60947
E1.2
E1.2
E1.2
E1.2
E1.2
circuit-
breaker UL Iu (A)
1066
E1.2-A 800
E1.2-A 1200
Figure 65
Dimension of busbars (mm)
Iu (A)
Horizontal terminals
630 2x40x5
800 2x50x5
1000 2x50x10
1250 2x50x10
1600 3x50x8
Horizontal terminals
Dimension of busbars
Q.ty
(in)
2 1/4 x 2
4 1/4 x 2
ABB | SACE Emax 2
Vertical terminals
2x40x5
2x50x5
2x50x8
2x50x8
2x50x10
Vertical terminals
Dimension of busbars
Q.ty
(in)
1 1/4 x 3
2 1/4 x 3
Continued on the next page
Management operations
5 - Installation