Acme Electric T253010S Distribution Transformer. Acme Electric Distribution Transformer, Air Colled/Dry, 240/480 VAC Primary, 120/240 VAC Secondary, 60 Hz, 1 ph, 3.5/7/12 A Maximum, Wall Mount, NEMA 3R, 115 deg C, 5.13 in L x 5.5 in W x 10.5 in H. Additional Description: ACME-T253010S TFMR 1PH 1.0KVA 240X480-120/240 PRIMARY VOLTS , 120/240 SECONDARY VOLTS - FOUR WINDINGS. Catalog Description: Low Voltage Distribution Transformer - Single Phase, 240X480 - 120/240V, 1kVA.