Permanent magnet for the magnetic circuit of a magnetic trip device preferably for a fault current circuit breaker

摘要

The earth leakage circuit breaker has a permanent magnet Ä11Ü that has a pair of pole surfaces Ä11a,11bÜ that forms a magnetic circuit with a yoke Ä9Ü The yoke is formed of a pair of magnetically isolated plates Ä7,8Ü. The permanent magnet has a prism shape that enables it to be optimally positioned relative to the yoke for efficient flux transfer.