<div dir="auto">In our new house the electrician is wiring up an electric heater* in our greenhouse for extra cold nights. The head scratcher is this:<br><br></div>
<div dir="auto">1) heater mains power = 380v, 3ф, 5 wire wye<br></div>
<div dir="auto">(We've got 3ф in three different rooms!)<br><br></div>
<div dir="auto">2) heater has 3 visible heating elements, as expected.<br><br></div>
<div dir="auto">3) power switch has OFF, FAN, 2.5kW, 5kW<br><br></div>
<div dir="auto">How, with the above combination do you get exactly half power? I presume the heating elements are identical. Could they possibly drop diodes in series with all three phases?<br><br></div>
<div dir="auto">Of course I'm still in California so can't actually see the heater in person before we get there...whenever the border opens to us Americans.<br><br><br></div>
<div dir="auto">* it was originally a gas heater, then the building code got stricter and nixed that. So then it was tied into the house hot water system. THAT just got nixed over the weekend so it was either electric or a wood stove and I'm not into tending that all night on cold nights. Our house fireplace is at least designed for heat storage, circulation chambers built in and a lot of rock. Heat it up during the day and it stays hot all night.<br><br></div>
<div dir="auto">Came out a "little" fancier than we had imagined, it's what happens when you hire an artist. Picture of it with the creator (and his gift of scotch).<br></div>
<div dir="auto"><a href="https://durandinterstellar.com/photos/Our_New_Home/2020-08-07_Peter_Fireplace.jpeg">https://durandinterstellar.com/photos/Our_New_Home/2020-08-07_Peter_Fireplace.jpeg</a><br><br><br><br></div>
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<div dir="auto"><!-- tmjah_g_1299s -->Jerry Durand<!-- tmjah_g_1299e --><br></div>
<div dir="auto"><a href="http://www.DurandInterstellar.com"><!-- tmjah_g_1299s --><a href="http://www.DurandInterstellar.com">www.DurandInterstellar.com</a><!-- tmjah_g_1299e --></a><!-- tmjah_g_1299s --> & <!-- tmjah_g_1299e --><a href="http://www.DurandInterstellar.ru"><!-- tmjah_g_1299s --><a href="http://www.DurandInterstellar.ru">www.DurandInterstellar.ru</a><!-- tmjah_g_1299e --></a></div>