摘要 |
<p>The invention relates to a circuit breaker, which is in a fault situation arranged to disconnect an electrical apparatus, such as a distribution transformer, from an average voltage network or a high voltage network at each terminal. At least one lik-spring mechanism (9 to 12) is arranged at a shaft (6) of the circuit breaker for holding contacts (1, 2) live in connected position and for pushing them apart to the extreme disconnected position when disconnected, while the shaft (6) is brought over the dead spot of its turning. For an initial release, the shaft (6) is at each phase provided with a lever arm (8), each lever arm at each phase being arranged to turn by means of a trip pin (19) of a striker (18) of a high voltage fuse (17) the shaft (6) of the circuit breaker and thus the moving contacts (1) of all phases from said connected position over the dead spot of turning said shaft.</p> |