The invention relates to a
tripping apparatus (1), particularly for circuit breakers, which comprises at least one controllable
tripping magnet (2) having an armature (2.1) that is operatively connected to a downstream
tripping gear (6.3), which engages in a tripping mechanism that acts on the
circuit breaker and is coupled to a preloaded spring (4) serving as a force
amplifier. According to the invention, the tripping mechanism comprises a
camshaft (5) having a plurality of
cam lobes (5.1, 5.2, 5.4), wherein an actuating means (6) is associated with each
cam lobe (5.1, 5.2, 5.4) having an offset rotational angle, and wherein, when tripped, at least two actuating processes associated with the respective actuating means (6.1, 6.2, 6.3) take place consecutively, so that the full
spring force is transmitted by way of the
camshaft (5) to at least one of said actuating means (6.1, 6.2, 6.3) so as to perform the relevant actuating process.