1. The problem statement, all variables and given/known data For a transformer, I need to get the ratings on the meters (wattmeter, ammeter, voltmeter) when it is put through an open circuit test and a short circuit test. Primary 240/480 Secondary 120/240 1KVA 60Hz 3. The attempt at a solution Now I am not sure what is meant by 'Primary 240/480' and 'Secondary 120/240'. In most transformer problems, I would be told something like 6600/230 V transformer, meaning Primary = 6600 V and secondary = 230 V. Anyone care to guess what it means?