Best way to put voltage taps on 30a wire on transformer secondary winding?

[gary350]

I need 4 voltage taps on 30 amp wire at turn, 10, 13, 16, 19. What is the best way to make taps on #10 stranded wire?

 

[Nigel Goodwin]

Probably by running separate windings out, and joining them together.

 

[ZipZapOuch]

Get a scalpel and remove 1/4" of insulation, look up the insulation. Wrap a turn of wire to tap into that bare section of copper. Put a piece of craft paper behind the tap so it doesn't short to the core (and possibly some black electrical tape. Not difficult.

 

[Lightium]

What voltages are you dealing with? Electrical tape is only good for 600 volts.

 

[ZipZapOuch]

What voltages are you dealing with? Electrical tape is only good for 600 volts.

Listed in the first post.

 

[ChrisP58]

Listed in the first post.

Not that I could see. The OP only says he wants multiple taps at 10, 13, 16 and 19 turns. Without knowing the turns per volt, we really don't know what the voltages will be.

That said, the secondary voltage will be likely be low due to the relatively higher number of primary turns.

 

[gary350]

I have lost my MATH information to determine, capacitors, inductor, resistor, values for a power supply? I make notes then can't find them?

 

[gary350]

PS is finished and works good. I decided to use a 6KW auto transformer = variac on 120 vac to get 15 vdc on the secondary at first then I can dial in any voltage up to 35 vdc. 100a rectifier has heat sinks. C1 & C2 are both 2500uf 200v. Choke is .53mh. Bleeder resistor 4.7k. Output 35vdc 30a. Scope shows ripple in the DC = .000 volts.

 

[Nigel Goodwin]

PS is finished and works good. I decided to use a 6KW auto transformer = variac on 120 vac to get 15 vdc on the secondary at first then I can dial in any voltage up to 35 vdc. 100a rectifier has heat sinks. C1 & C2 are both 2500uf 200v. Choke is .53mh. Bleeder resistor 4.7k. Output 35vdc 30a. Scope shows ripple in the DC = .000 volts.

What scope?, and was that under load? - I don't see as sticking a multimeter on it is achieving much?. But with zero load, you should get zero ripple - you have far too little capacitance to give low ripple at high currents.

And what's with the choke?, a tiny choke like that isn't doing much at 50/60Hz (100/120Hz).

 

[gary350]

What scope?, and was that under load? - I don't see as sticking a multimeter on it is achieving much?. But with zero load, you should get zero ripple - you have far too little capacitance to give low ripple at high currents.

And what's with the choke?, a tiny choke like that isn't doing much at 50/60Hz (100/120Hz).

No load yet. What changes does it need?

 

[Nigel Goodwin]

No load yet. What changes does it need?

No load, no ripple - I'd say you need a LOT more capacitance, dump the choke as it's doing nothing. You're going to get ripple, it's just a question of how much is acceptable.

 

[gary350]

No load, no ripple - I'd say you need a LOT more capacitance, dump the choke as it's doing nothing. You're going to get ripple, it's just a question of how much is acceptable.

I have 2 of these 7400 mfd caps

 

[Nigel Goodwin]

What are you trying to do, and how much ripple is acceptable?.

 

[gary350]

Power supply capacitor discharge time should be slower than the next AC ripple.

 

[Nigel Goodwin]

Power supply capacitor discharge time should be slower than the next AC ripple.

That makes no sense at all?, how much ripple is acceptable?.