I am in the process of designing an AC Power Supply. My team and I have decided to go with a Multi tap Transformer to tap the 7 voltages that we need (240, 380, 400, 480, 600, 690, and 1,000VAC). At each of these 7 Voltages we are 4 current levels of 0.5, 2.5, 5.0, and 10Amps. We are in the process of ordering a Variable Resistive AC load bank that will automatically give us the resistance values at each voltage to reach the currents that we need. My manager had informed me that I will need switches within the power supply for the transformer and the load bank to properly operate. I have never had to order relays before but I was wondering based off of the information that I have given what switches would I need for the AC power supply and how would they function within the supply. Such as high powered relays and solid state relays. Thanks to anyone who can help.