I am jumping into some projects where I will be using some capacitors and wondering how "universal" they are. By that I mean: does it matter if it is AC or DC, if I have a 1KV 1F Capacitor, can I use it for 1V and 1KF?
While I understand a low voltage capacitor may not give enough shielding to prevent a higher voltage from jumping across and shorting out, does the high voltage capacitor have too much separation to be used at low voltage?
Can I think of them as simply storing a certain amount of watt hours, and then depending on the voltage I am supplying it will fill up to full, but only at that voltage - as in I will put 1V in, and it will stay at 1V, but develop a massive collection of that? Obviously if I am using a 250V capacitor on a 110V line, it isn't storing it at 250V, so I would assume my assumption is correct, the question becomes is there a limit to how low the voltage it will store actually is?
Say on a motor starting capacitor, if it calls for a 250V 5uF, but I supply a 5KV 1F, it shouldn't do anything bad since the motor is just going to use what it needs right? I realize that using too small a capacitor would result in it not working as desired, but kind of like plugging in a D cell battery to a tiny LED, if the voltage is right, it doesn't matter what the ability of the battery is to deliver more is.
While I understand a low voltage capacitor may not give enough shielding to prevent a higher voltage from jumping across and shorting out, does the high voltage capacitor have too much separation to be used at low voltage?
Can I think of them as simply storing a certain amount of watt hours, and then depending on the voltage I am supplying it will fill up to full, but only at that voltage - as in I will put 1V in, and it will stay at 1V, but develop a massive collection of that? Obviously if I am using a 250V capacitor on a 110V line, it isn't storing it at 250V, so I would assume my assumption is correct, the question becomes is there a limit to how low the voltage it will store actually is?
Say on a motor starting capacitor, if it calls for a 250V 5uF, but I supply a 5KV 1F, it shouldn't do anything bad since the motor is just going to use what it needs right? I realize that using too small a capacitor would result in it not working as desired, but kind of like plugging in a D cell battery to a tiny LED, if the voltage is right, it doesn't matter what the ability of the battery is to deliver more is.