OK i dont claim to be an electrician but i have his job, and would like to see if you guys can help me size some of the projects i have cuz i found the formulas i need for sizing transformers ie: VxA=VA, VA/V=A, W/V=A. So with this new found info i begin my journey as a technician. I have 480VAC input to a fused disconnect switch with (3)30amp fuses. L1,L2,L3 goto terminal blocks, then split and goto a motor starter with blower(5.5amps), and to a 240/480VPri. 120Vsec. 1000VA transformer. I have 18 total pilot lights(.02a each), a daul solenoid valve(45VA / 120v = .375a?), 12 solenoid valves(8.1Watts each / 120V = 0.0675a X 12=.81a), 6 flame monitors at 1a a piece. This is all running on the 120v line from the transformer except the motor starter and blower. Is my transformer sized correctly?
.36 amps in pilot lights? 18 total @.02a each?
.375 amps for dual valve? 45VA
.81 amps total for single solenoids @ 8.1watts each
6. amps in flame monitors
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7.545amps total?
X 120v
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905.4VA?
