Looking to reuse my transformer in my retrofit (bridgeport knee mill) and have been trying to read up.
On my multi tap transformer, there are choices of 20 0 208 220 380 420 460 ESS on the primary side
and secondary 0 30 0 110 0 25 50
On the schematic it looks like the secondary has three different windings. On the schematic it shows it being hooked up to 0 and 420v but it was actually hooked up using 0 and 380v
So, my questions are this;
1.Why are there multiple choices for the primary side?
2.I am looking at using single phase 220v. Do I need to hook it up to the 0 and 220 taps on the primary side to get the voltages stated on the secondary side?
thanks to anyone who can shed any light on this, all the info I have read only states there being only two taps for the primary side.
On my multi tap transformer, there are choices of 20 0 208 220 380 420 460 ESS on the primary side
and secondary 0 30 0 110 0 25 50
On the schematic it looks like the secondary has three different windings. On the schematic it shows it being hooked up to 0 and 420v but it was actually hooked up using 0 and 380v
So, my questions are this;
1.Why are there multiple choices for the primary side?
2.I am looking at using single phase 220v. Do I need to hook it up to the 0 and 220 taps on the primary side to get the voltages stated on the secondary side?
thanks to anyone who can shed any light on this, all the info I have read only states there being only two taps for the primary side.