Heater circuit

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It depends on the voltage rating of the heaters; they'll each receive 277v as you have them here.

You show each group wired in a wye configuration, with the two "neutral" points tied together.
 
LarryFine said:
It depends on the voltage rating of the heaters; they'll each receive 277v as you have them here.

You show each group wired in a wye configuration, with the two "neutral" points tied together.
Click to expand...

The title of the picture indicates “240VAC Heaters”.
I think he intends to connect each pair in series phase-to-phase (delta). The drawing is not correct for that.
 
retirede said:
The title of the picture indicates “240VAC Heaters”.
I think he intends to connect each pair in series phase-to-phase (delta). The drawing is not correct for that.
Click to expand...
The way I have them drawn is how they were wired up on another machine, which was here way before me, so I was just copying that. They've always worked wired up this way, but at least I know it's not correct. According to the spec sheet, the heater cartridges are 250W and rated for 240V. My guess is that all they had for power was the 480VAC 3 Phase, but needed to use these specific heaters, so wired them up the way they are (?). So, using 480VAC incoming 3-phase power, what is the correct way to wire up these heater cartridges? Can someone provide a simple drawing for me? Thanks.
 
Wire H1 and H2 in series, and connect to L1 and L2.
Wire H3 and H4 in series, and connect to L2 and L3.
Wire H5 and H6 in series, and connect to L3 and L1.

Or, if it's easier:

Wire H1 and H4 in series, and connect to L1 and L2.
Wire H2 and H5 in series, and connect to L2 and L3.
Wire H3 and H6 in series, and connect to L3 and L1.

In other words. do this, but each 'heater' will be made up of two elements in series:

1644604400932.png
 
LarryFine said:
Wire H1 and H2 in series, and connect to L1 and L2.
Wire H3 and H4 in series, and connect to L2 and L3.
Wire H5 and H6 in series, and connect to L3 and L1.

Or, if it's easier:

Wire H1 and H4 in series, and connect to L1 and L2.
Wire H2 and H5 in series, and connect to L2 and L3.
Wire H3 and H6 in series, and connect to L3 and L1.

In other words. do this, but each 'heater' will be made up of two elements in series:

View attachment 2559402
Click to expand...
Great!! Thank you.
 
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