BigPatents India

The current-limiting switch (S) has an arc-resistant contact arrangement (K1), which is intended to carry the rated current (IN)' of a first switching point (51)' and two commutation paths (P1 and Pz) connected in parallel with the first switching point (Sl). The first commutation path (P1) contains, in series, a contact arrangement (KT) of a second switching point (ST) and an electronic power switching apparatus (T). The second CoJIUnutation path (Pz) contains, in series, a switching apparatus (SA) and a current-limiting element (RB). The contact arrangements (K1 and KT) are designed to be coaxially symmetrical and are arranged in a pressure- resistant housing (G). Both switching points have electrodynamic' drives which open and close very quickly. Thanks to the extremely space-saving, coaxial arrangement of the contact arrangements, undesirable stray inductances can be avoided. This allows the current-limiting switch to be switched on and off very quickly.