Connection To The Power Circuit - ABB SACE Emax 2 Installation, Operation And Maintenance Instructions
Low voltage air circuit-breakers
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Connection to the power circuit The connection of a circuit-breaker to the power circuit is performed using the connection busbars of the
28 | © 2014 ABB | 1SDH000999R0002 - L8569
electric switchgear fixed to the terminals of the circuit-breaker. The sizing of the busbars is specified by the
designer of the electrical switchgear.
Figure 63
IMPORTANT: it is possible to obtain different capacities for the connections by altering
the thickness and number of busbars in parallel.
The following the 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
Iu (A)
IEC 60947
E1.2
630
E1.2
800
E1.2
1000
E1.2
1250
E1.2
1600
circuit-breaker
Iu (A)
UL 1066
E1.2-A
800
E1.2-A
1200
Figure 64
Dimension of
Horizontal termi-
busbars (mm)
nals
2x40x5
yes
2x50x5
yes
2x50x10
yes
2x50x8
-
2x50x10
yes
2x50x8
-
3x50x8
yes
2x50x10
-
Dimension of bu-
Horizontal termi-
sbars (inches)
nals
1x1/4x3
-
2x1/4x2
yes
2x1/4x2
-
3x1/4x2
yes
Emax E1.2 circuit-breakers | 6 - Installation
ABB | SACE Emax 2
Vertical terminals
yes
yes
-
yes
-
yes
-
yes
Vertical terminals
yes
-
yes
-
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