Please excuse my ignorance, but I need to convert a three phase 208 building to operate a system that requires 220vac.
Back ground:
I understand that 220 vac in the USA operates two 110 leads 180 degrees out of phase and 208 has its out puts at 120 degrees of phase shift. This was why I believed the equipment we were installing was having problems. at first when using only two leads of the 208 power.
The equipment is from Europe and expects a 230 phase and a neutal. The machinerey does not have any neutral connections going to ground in any way, therefore typical installs in the USA work fine with standard US 220vac building wiring. The equipment has always been quite happy with the voltage potential supplied by the two 110vac phases 180 degrees apart.
The install team installed a Buck-boost transformer to get 230 (228 actual) when measured with a multimeter. They used two phases of 208 and the two leads out of the buck-boost. The equipment however, still failed to work poeperly.
The next attempt was to put one 208 phase and the neutral as an input and the equipment worked (I think this only provided 150+ vac across the out puts). Unfortunately it draws a shite load of current.
Questions:
What's wrong?
Is the 120 degree phasing of 208 making the 230 output of the buck boost unusable with my equipment? (It's an eddy current retarder) The rep at ACME says no, the output is 180 deg.
Is the rep wrong?
Thanks for any and all suggestions!
Back ground:
I understand that 220 vac in the USA operates two 110 leads 180 degrees out of phase and 208 has its out puts at 120 degrees of phase shift. This was why I believed the equipment we were installing was having problems. at first when using only two leads of the 208 power.
The equipment is from Europe and expects a 230 phase and a neutal. The machinerey does not have any neutral connections going to ground in any way, therefore typical installs in the USA work fine with standard US 220vac building wiring. The equipment has always been quite happy with the voltage potential supplied by the two 110vac phases 180 degrees apart.
The install team installed a Buck-boost transformer to get 230 (228 actual) when measured with a multimeter. They used two phases of 208 and the two leads out of the buck-boost. The equipment however, still failed to work poeperly.
The next attempt was to put one 208 phase and the neutral as an input and the equipment worked (I think this only provided 150+ vac across the out puts). Unfortunately it draws a shite load of current.
Questions:
What's wrong?
Is the 120 degree phasing of 208 making the 230 output of the buck boost unusable with my equipment? (It's an eddy current retarder) The rep at ACME says no, the output is 180 deg.
Is the rep wrong?
Thanks for any and all suggestions!