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4-pole Contactors
In addition to the 3RT13 4-pole contactors with 4 NO contacts to switch ohmic
loads there are also the 3RT15 SIRIUS contactors with 2 NO +2 NC contacts. These
are used for instance to change over the poles of crane motors, as brake contactor
or to switch two loads separately from one another.
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All about 3TK20 Contactors, 4-pole, 4 kW
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Pre sales info