FBD Buck-N-Boost Transformer 60Hz 30 Amp - 14-0378-0005Buck N Boost transformer assembly with cord, 60Hz, 0. 5 KVA, 30 amp plug, for a FBD 56X or 77X frozen beverage dispenser with a 30 amp plug. When to use a Buck N Boost transformer: 1) To raise or lower the line voltage to the range required by the unit, 2) to prolong the life of electrical components, 3) unit voltage reads below 200V when the compressor is ON, 4) unit voltage reads above 230V when the compressor is ON, 5) to maintain voltage in the