fixed TDK Lambda rws600B 24v psu blew up when adjusting voltage

amateur_24 said:

Therefore I tried adjusting the output voltage to see if i could get 48v out of it. However it just suddenly cut out whilest i was adjusting the pot at the back.

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Did you check the datasheet?

It is unreasonable to expect such a PSU to give out twice the rated voltage.

amateur_24 said:

After leaving off for a bit, it now turns back on. I'm guessing I must of tripped the overvoltage protection.

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Correct.

amateur_24 said:

May I add it's not very effective as I was able to adjust the ouput up to 28v.

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Look at the datasheet, the voltage adjustment range is 21.6 to 27.6 volts, so the overvolt trip operating at 28v is reasonable.

amateur_24 said:

Any 24v electronics connected to it would be toast.

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Most unlikely.

And you expected to adjust the output to 48 volts ?
That seems an unrealistic expectation.
Where would the manufacturer set the overvolt trip on a PSU adjustable from 24 to 48 volts ?

JimB

true. I just didn't want to spend more money on a 48v psu. At least now I know my expensive psu is actually pretty well designed. As expected for such an expensive psu.

amateur_24 said:

Any 24v electronics connected to it would be toast.

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Most unlikely.

Really thats 4volts over. I am suprised by this.

amateur_24 said:

true. I just didn't want to spend more money on a 48v psu. At least now I know my expensive psu is actually pretty well designed. As expected for such an expensive psu.

Most unlikely.

Really thats 4volts over. I am suprised by this.

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Why?, most electronics isn't terribly voltage sensitive - exceptions tend to be specific IC's, such as TTL (usually 5V), or various CPU's etc. (often 3.3V or 5V) - but even then the circuit they are in 'probably' contains a voltage regulator to feed them.

While feeding 28V to a 24V circuit 'could' potentially damage it, I would imagine the chances would be relatively low.

I suppose a 24V circuit could use a 25V electrolytic across it's incoming supply, and that extra 4V 'could' damage it, modern electrolytics aren't very happy with over-voltage - but I'd like to think the electrolytic would be 35V, not 25V (that's a bit too close to 24V), so it probably wouldn't be an issue.

Most 24V industrial gear is rated for somewhere from 28 - 30V maximum, or sometimes even more.