Query on 24V supply

[jinu_j]

Hi Folks

have a basic question on Fundamentals. I have a Power supply that has the following terminals +12V, 0V and -12V. Now normally i can get 12V by connecting between 0 and 12 and -12V by connecting load between 0 and -12V. I can also get 24V by connecting load between -12V and +12V.

Now my queries

1. Is the 24V i get by connecting load between -12V and +12V same as connecting the load between a 0V and 24V power supply. Is there anything to take care of when using one source against the other ?

2. Now assuming there are 5A fuses between 0V and -12V and also between 0 and 12V. Now when i connect the load between -12V and 12V, would these fuses come into play?

Thanks

[stj]

Re: Query on 24V supply

is the + and - rated for the same current?

[jinu_j]

Re: Query on 24V supply

is the + and - rated for the same current?

Yes they are rated for the same current 5A

[stj]

Re: Query on 24V supply

then you can get 24v, but you cant connect the psu to anything earthed

[jinu_j]

Re: Query on 24V supply

can i use this voltage/source on components that have specified range of 0-24V. For eg: if i am using an IC whose VCC pin range is 0-30V can i use this power source ?

[stj]

Re: Query on 24V supply

yes, but as i said - no part of your circuit can connect the 0v(GND) rail to mains ground.

not unless you modify the psu first.