Electronics > Beginners

Not sure if i broke a power supply just now

(1/3) > >>

Mp3:
Hey everybody. I have a Mean Well RQ-50D which provides +5v, -5v, +24v and -24v.

I intended to test it out before i wired it up to the device it was going to connected to, just to be sure all the voltages were correct, so i wired up the AC plus ground in line with a power switch. When i flipped the power switch the green LED on the RQ-50D lit up for a second then went back away. With the switch set to either on or off, i'm not measuring any AC or DC voltage from any of the screw terminals.

Did I kill it by feeding power to the power supply without any loads connected to the DC output terminals?

Thanks in advance.... I already have another RQ-50D in the mail. I just don't know if i killed it for sure or if i got a faulty unit.

JxR:
Did you happen to check if there is a fuse for 120V/230V on the input? Sometimes you have to change the orientation of the fuse, sometimes it is just flipping a switch.


--- Quote from: Mp3 on June 06, 2019, 10:45:33 pm ---With the switch set to either on or off, i'm not measuring any AC or DC voltage from any of the screw terminals.

--- End quote ---

If you are not able to measure AC voltage on the terminals then you either have something wired wrong, you tripped a fuse, or something is wrong with your meter.  Forget about the DC output at the moment, if you really have no AC input.

Mp3:

--- Quote from: JxR on June 06, 2019, 11:01:50 pm ---Did you happen to check if there is a fuse for 120V/230V on the input? Sometimes you have to change the orientation of the fuse, sometimes it is just flipping a switch.


--- Quote from: Mp3 on June 06, 2019, 10:45:33 pm ---With the switch set to either on or off, i'm not measuring any AC or DC voltage from any of the screw terminals.

--- End quote ---

If you are not able to measure AC voltage on the terminals then you either have something wired wrong, you tripped a fuse, or something is wrong with your meter.  Forget about the DC output at the moment, if you really have no AC input.

--- End quote ---

Thank you and for now i'll double check the AC. I had a feeling  that i might have damaged a connection on AC inlet, so i'll try wiring AC power directly to the AC input and check again.

I'll also take the lid off to check for a fuse, but i dont believe this is one of the models you have to do that on (could be wrong)

It looks like this:

JxR:
Ok.  Just be careful.  If your unsure about any thing, such is what wire goes where for the AC line when your connecting it to your cable, please make sure you look at some material online before going further.  Double check your wires to the plug end of your cable using the continuity setting on your voltmenter to make sure you know which wire is what.  Most voltmeters require you to set it specifically to AC voltage as well, so double check that before taking your measurements.

MarkF:
You better check the voltages again.  The values you listed for the RQ-50D are incorrect.
https://www.meanwell.com/Upload/PDF/RQ-50/RQ-50-SPEC.PDF

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod