I bought some electrical sensitive equipment from overseas which runs on 220v. I tried to run it on 240v in Australia and some of the resistors have been burned. I know it will damage the equipment to run on 240v but cannot find a transformer to convert from 240v to 220v.
Any advice on this?
Thank you.
** You story sounds phoney.
What sort of gear was this ??
...... Phil
Use an autotransformer.
--
View in Courier
240>----+--+ +--->216
| O| |O
| P||S
| R||E T1
| I||C
| | |
| | +--->216
O| |O
P||S
R||E T2
I||C
| |
240>----+--+
T1 = 240P 240S
T2 = 240P 24S
JF
Or a bucking transformer with a secondary that produces 20VAC at (at least) the primary current, connected so that the 20VAC secondary bucks the 240VAC, producing 220VAC at the input of the equipment.
-- news:8t9pv3dmhoipmq1silgjlmerkab6d1iu00@4ax.com JF
Find it rather hard to believe; a) The equipment is THAT sensitive to voltage? Variation from 240 to
220 is less than 10%. Mains supplies in many countries can vary more than that on a regular basis. Are we sure there is not something else to this question????? b) That that in checking around no one has mentioned the two most obvious means of reducing voltage in such a situation. As described by other posters here; 1) An auto transformer 2) A bucking (voltage opposing) transformer; either of which can be used to knock off approximately 20 volts or so. c) Less sophisticated means could include sticking a large lamp (or several lamps in parallel) to knock off the unnecessary voltage, probably on the cut and try method. d) Several other odds and ends of reducing voltage come to mind, depending on whether keeping the waveform as close to a sine wave or not? Is it a constant load or a varying one. Hooking up one winding of transformer in series with the 240 supply and varying the load in one of its 'other windings' so as to modify line voltage. e) A Variac; sized depending on the wattage to be handled! Appears that more information, as not unusually, is needed to give a detailed answer!
Another thought. Is the eqipment designed to run on some other frequency such as 60 hertz (as in the Americas) and in Australia the supply is AFIK 50 hertz? Also the type of eqipment it is could be crucial! For example it was reported on one news group that those 60 cycle portable fridges and ice boxes coolers don't work well, if at all on 50 hertz and have to be mechanically modified/retuned!
Another: Just a wild idea? Not possibly a misprint of 220 volt for 120 volt? In some 'Chingrish' instructions? Having seen some things that can happen when eqipment was shipped to the Middle East, from the Far East, ostensibly of the right voltage. Then finding out the voltage rating was for a single phase instead of a 3 phase supply. Oops! With memories of dealing with an Indian technician, working for an Arabic company, purchasing from China equipment that was partially manufactured in S.Korea. Anyway just a thought!
schreef in bericht news: snipped-for-privacy@s37g2000prg.googlegroups.com...
Are you sure you did not use 60Hz equipment in a 50Hz environment?
petrus bitbyter
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