ABB | SACE Emax 228 | © 2017 ABB | 1SDH000999R0002 - ECN000058721 - Rev. B Emax E1.2 circuit-breakers | 6 - InstallationConnection to the power circuit The connection of a circuit-breaker to the power circuit is performed using the connection busbars of theelectric switchgear fixed to the terminals of the circuit-breaker. The sizing of the busbars is specified by thedesigner of the electrical switchgear.Figure 63 Figure 64IMPORTANT: it is possible to obtain different capacities for the connections by alteringthe 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 usedfor each type of circuit-breaker:circuit-breakerIEC 60947 Iu (A) Dimension ofbusbars (mm) Horizontal terminals Vertical terminalsE1.2 630 2x40x5 yes yesE1.2 800 2x50x5 yes yesE1.2 1000 2x50x10 yes -2x50x8 - yesE1.2 1250 2x50x10 yes -2x50x8 - yesE1.2 1600 3x50x8 yes -2x50x10 - yescircuit-breakerUL 1066 Iu (A) Horizontal terminals Vertical terminalsQ.ty Dimension of busbars (in) Q.ty Dimension of busbars (in)E1.2-A 800 2 1/4 x 2 1 1/4 x 3E1.2-A 1200 4 1/4 x 2 2 1/4 x 3
