KW Transformer Question

Fixed 14V.  If you place wires on any 2 post, you get the voltage that the number between those two post states.

U to A and U to B are the handle variable voltage.  G

If you go U-C you get 6 volts. If you go d-u you get 20 volts. If you go C-D you get the 14 volts. Check your email. I just sent you the manual.

Rob

According to the Lionel instruction sheet, you get 14 volts by using the "C" and "D" terminals.

You can also get 18 volts by using the "D" and "U" terminals.

The sheet also indicated that you can get a lower variable voltage range by using "C" with the "A" or "B" terminal, which is 0-14 volts instead of the 6-18 volts provided when you use the "U" terminal with the "A" or "B" terminal.

Using "C" and "U" together is not documented.  The combination would give 6 volts, but this combination has no internal circult breaker protection. Therefore, I do not recomment that this combination be used.

These constant voltage outputs are used for lights , switches and trackside operating stuff.  They are independent of the A and B throttle.

CW, using C-U is documented to show 6 volts in the manual, although it does not show it being used as you mentioned.

Rob

I see C-U documented in the repair pages, but not in the copy of the instruction sheet that I used (from the 1978 edition of the Aurotech manual).

The service section states that the following combinations are not protected by the internal circuit breaker: A-B, B-D, and C-U.

oldrob,

   Right on the money sir, you know your stuff.

Stew,

   You are correct also, they are totally independent of A&B, for running switches and such.

If you use this transformer for running DCS you must have independent Breakers or fuses.

PCRR/Dave

"Such", yes, switches, probably not unless they are Marx.   Nor anything else using a layout common ground. 

The C & D combination really is for lights and other stand-alone accessories on a circuit completely separate from any circuit using common ground if you are tapping the 14 volts.