Let the fun begin !!! ???

**PAULRO** · 06-03-2015

i decided to test the coil with a power up so i used a safe block , hooked up the brown and blue to 230 vac i then joined black and yellow together and red and orange together on the secondary and put them in a terminal connector . when i engaged the safe block the coil hummed for about a second and then stopped. i checked the fuse in the safe block ( 13 amp ) and it was blown so i tried again and the same thing happened. i metered the connector and obviously got no reading . am i correct in thinking that i should not have blown the fuse and should have 50v ac across the terminals?

**Clive S** · 06-03-2015

Do you have a link for the coil?

You need to connect the two sec. coils in series so join red and yellow and measure black and orange 50V It might well blow the fuse on start up with a 625w coil
..Clive

**PAULRO** · 06-03-2015

http://www.airlinktransformers.com/c...nge/CM0625225/

just my luck to blow fuses. i thought i might have connected it wrong or perhaps i shouldn't have tested in in the manner in which i did. should i wait to get the rest of the supply hooked up or would that matter?

**Clive S** · 06-03-2015

Originally Posted by PAULRO

http://www.airlinktransformers.com/c...nge/CM0625225/

just my luck to blow fuses. i thought i might have connected it wrong or perhaps i shouldn't have tested in in the manner in which i did. should i wait to get the rest of the supply hooked up or would that matter?

Ok short black and yellow together and take the output from red and orange then you should see 50V You have connected them in parallel . I think the fuse is blowing because of the surge. ..Clive

**PAULRO** · 06-03-2015

cheers Clive , 52.1 beautiful V ac.

**PAULRO** · 12-03-2015

finally got back to the power supply and got it set up . i'm reading 73 V DC . is this o.k. ? i know that 68 v dc is the magic number . is there a way to reduce it other than reducing the number of windings. i would not be comfortable with stripping out the coil to achieve that.

**Clive S** · 12-03-2015

Originally Posted by PAULRO

finally got back to the power supply and got it set up . i'm reading 73 V DC . is this o.k. ? i know that 68 v dc is the magic number . is there a way to reduce it other than reducing the number of windings. i would not be comfortable with stripping out the coil to achieve that.

Its fine at that and are measuring it without a load as well also the mains voltage will fluctuate.
How about a pic. ..Clive

**JAZZCNC** · 12-03-2015

Originally Posted by PAULRO

finally got back to the power supply and got it set up . i'm reading 73 V DC . is this o.k. ? i know that 68 v dc is the magic number . is there a way to reduce it other than reducing the number of windings. i would not be comfortable with stripping out the coil to achieve that.

What drives are you using.? If 80V max then it will be fine but if 75V max then it's a little close for comfort because as Clive says mains does fluctuate. When your reading 73Vdc what is the Mains input reading.?
Also as Clive says you have no load so connect the drives with motors attached and then check.