<a href="https://en.wikipedia.org/wiki/Electronic_symbol" class="extiw" title="w:Electronic symbol">Symbol</a> of a three-pole <b>motor-protective circuit breaker</b> respectively <b>tariff switch</b> (with thermal and magnetic overcurrent trip)
<a href="//commons.wikimedia.org/wiki/User:SweetWood" title="User:SweetWood">SweetWood</a>
<span class="int-own-work" lang="en">Own work</span>