| Author |
Message |
    
Vernonott
| | Posted on Sunday, October 14, 2001 - 12:18 pm: | 
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About once a year I have the bridge rectifiers blow in my big box.Could it be caused by something I am doing or is this the normal life span of them? |
bruce
| | Posted on Sunday, October 14, 2001 - 8:58 pm: |
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sounds strange i have many power supplys that use them no problems at all almost sounds like they are underrated for PIV or surge current the realy old ones sealumn ( medal oxide ) were unstable and had large voltage drops but i havent seen one in 30 years. see if you can find one with slightly higher ratings i like to see if that is it
bruce |
Hamcber
| | Posted on Sunday, October 14, 2001 - 10:45 pm: |
|
My bridge rectifiers are over 20 years old and formerly saw broadcast use 24/7. You may be drawing too much current for them to handle. If the diodes are 1 amp types and you draw more than 1 amp through them, WHAMMO!
Either that or maybe a transient is hitting them. Does the whole stack blow at once or does one diode at a time short out? You may have to put some transient caps across the individual diodes to take the transients off of them. |
Vernonott
| | Posted on Monday, October 15, 2001 - 6:46 am: |
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Thanks for responding.It cost me about $65.00 a year which isn't too bad. |
Hamcber
| | Posted on Monday, October 15, 2001 - 11:30 am: |
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$65 a year which is an unnecessary expense... |
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