The topic is incorrect. This is not a text break or a page break. This is a marker for a section break.
This is what I use to denote a section break. It works in ePub and KePub.
CSS
Code:
hr {
margin-top: 1em;
margin-right: 40%;
margin-bottom: 0.9em;
margin-left: 40%;
border-top: 2px solid;
}
.noindent {
text-indent: 0;
}
HTML
Code:
<p>Last paragraph of this section.</p>
<hr/>
<p class="noindent">This is the first paragraph of the this section.</p>