Hey people,
a short, maybe silly, question. Would there be any advantage, or disadvantage, if the bleeder resistors which uncharge the psu capacitators would just be connected to the caps, when the psu is switched off. For example with a switching relay.
best regards J.
a short, maybe silly, question. Would there be any advantage, or disadvantage, if the bleeder resistors which uncharge the psu capacitators would just be connected to the caps, when the psu is switched off. For example with a switching relay.
best regards J.
Yes, it can be done, and it is effectively done for large capacitor banks, to ensure safety without having to needlessly dissipate huge amounts of power.
It has to be done carefully though, as a failure could have catastrophic results: if the bleeder remains in service when it shouldn't, it will cause excessive dissipation, and if it fails open, the capacitors will retain a dangerous charge
It has to be done carefully though, as a failure could have catastrophic results: if the bleeder remains in service when it shouldn't, it will cause excessive dissipation, and if it fails open, the capacitors will retain a dangerous charge
