Question about Computers & Internet
Our mains supply is 220VAC with frequency 50hz in India. Is it possible to adjust the output voltage in Microtek Heritage 600 UPS? The output voltage reads on a DVM 255VAC!!! and the mains voltage reads 233VAC, the frequency reads 49.5hz also the telephone sockets at the back do they help?
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Posted on Jan 02, 2017
SOURCE: 50Hz to 60Hz conversion
Hi, Your idea is basically sound and should work as long as the UPS originally is designed to produce 240V 60Hz and has its own built in timebase. The reason is that the input as long as the voltage matches makes no difference (50 or 60 Hz). By design, the UPS converts the input voltage to DC to charge the internal battery. The battery then powers an electronic circuitry that produces the 240V 60Hz. The input is then isolated from the output in terms of frequency. This is a common design, however, there are some (not many) that uses for its local oscillation sampling from the source and therefore will replicate the input frequency to its output, but very rare; it's better that you know they exist. Hope this be of some help/idea. Post back how things turn up or should you need further information. Good luck and kind regards. P.S. The only problem with 50 and 60 Hz is heat buildup which is tolerable and still within safe parameters. The only time the 50/60 HZ makes a big difference is when motors are used, timers such as in the early designs of microwave ovens, washing machines, etc., pumps and other highly inductive consumers. Most electronic devices converts the AC input to DC and therefore the frequency has negligible effect. Of course others may see it differently.
Posted on Sep 16, 2007
Unfortunately, it seems that you UPS is mostly designed for 60 Hz. However, there seems to be an exception for 380-415V input / 380-415V output where 50 Hz is supported.
Of course, 380-415V is not usable for IT systems as is, you would then have to transform it back to 208V or whatever voltage your infrastructure is requirering.
Check out the table at page 2 of this document:
One thing that is not specified in this document is if the UPS can be easily switched from one input voltage to another or if you need to replace some parts.
Hope this helps.
Posted on Jan 26, 2008
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