Deans Ultra Y harness

[Tony]

I'm trying to hook up lipos in series. Do you guys DIY, or do you buy them some where? Also,10 or 12 guage?

[detox]

Dean's makes one...here's link:

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXNKY9&P=ML

Parallel version:

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXNKY8&P=M

[detox]

Castle bullet connectors are less resistant and are better at preventing sharp voltage loss. DIY is best.

Read this post by Steve.
http://forums.offshoreelectrics.com/...ead.php?t=5740

[Tony]

Where can i get Castle bullet connectors?

[Chilli]

Bullet Connectors:
http://www.offshoreelectrics.com/products.php?cat=39

Series Y Harness:
http://www.offshoreelectrics.com/pro...d=ose-yharness

[lomdel]

The OSE -harness and Etti 150 ESC both come with 12-gauge wires, but my 4000mah 3S Zippy lipo's came complete with thick 10-gauge wires. How will different gauge wires in this configuration affect heat build-up and performance?

[AndyKunz]

If you aren't sucking insane amps, you won't notice th difference. Thinner wires will run hotter. The Deans connectors will be hotter than the wires, but that's normal. But then, only if you run insane amps.

Andy

[Tony]

If you aren't sucking insane amps, you won't notice th difference. Thinner wires will run hotter. The Deans connectors will be hotter than the wires, but that's normal. But then, only if you run insane amps.

Andy

How about a 12 guage Y connector with 5.5mm connectors to the esc, and two Deans connectors to the Lipos in series?

[egneg]

If you have bullet connectors on the lipo's and esc and the leads are long enough you don't need anything. Just plug in the positive from one lipo to the esc and the negative to the positive on the other lipo and the negative from that lipo to the esc. I hope this is NOT clear as mud.

[lomdel]

Bullet connectors on lipos is not a good idea, because of the possibility of them touching each other and short-circuiting your pack... Deans are kept apart by the plastic thingie they are inserted into, for that reason.

[Tony]

Bullet connectors on lipos is not a good idea, because of the possibility of them touching each other and short-circuiting your pack... Deans are kept apart by the plastic thingie they are inserted into, for that reason.

What i meant was one end of the Y has two 5.5mm bullet connectors, and the other two ends of the Y have two Dean connectors. The 5.5 mm bullets are
connecting to the ESC. While the two Dean connectors are pluging into the Lipos.

[DISAR]

Deans connectors are for upto 60 Amps. If your setup uses higher amps the best thing is to have bullet connectors (5.5-6) on your batteries and ESC. As Egneg stated above if you have the following combination of bullets and your cables are long enough you just don't need an extra Y harness:

Batteries: Red -Male, Black- Female
ESC: Red -Female, Black-Male

Plug the Nr.1 battery red to the ESC red, the Nr.1 bat. black to the Nr.2 bat. red and the Nr.2 bat black to the ESC black. This is just for info. and guessed that should mention.

[lomdel]

Thanks Disar! I didn't know that Deans is rated at max 60A... So using two 4000mah 20C 3S1P lipo packs in series will be too much for a Deans Y-harness? 2x (4x20=80A) = 160A through one Deans to the ESC would melt it, right? Or can I take the chance? How do I keep the two bullets on one pack from touching each other and short-circuiting?

[azjc]

Deans Ultra connectors are rated for 75 amps on thier site but I have put over 125 amps through them and they have been fine, I feel they just give them a conservative rating. you will be pulling the most amps when you go WOT from a stand still

[DISAR]

In theory the Deans are fow max. 60A and stated in the OSE site:
http://www.offshoreelectrics.com/products.php?cat=39

The Amps that you mention are the max.Amps that your batteries can deliver and not the actual Amps of your setup. The only way to find the Amps of your setup is to use an Eagle tree system or the OSE method:
http://www.offshoreelectrics.com/conversion.htm

My proposal is not to take the chance with the Deans and use the bullet connectors (4 or 5.5 or 6 mm). I also changed to bullets because my Deans were getting hot (not melted) at about 70 amps. Also you see that the contact area of a Deans connector is smaller than that of bullet.
To avoid short circuit and wrong polarities you fit a male bullet on the red(+) and a female on the black(-) with heatshrink tubing. In that way you cannot have short circuit or confuse positives and negatives. An on the ESC you fit a female on the red and a male on the black and if your cables are long enough you can plug as mentioned above. If the cables are short then you will have to make a harness. I will add a photo if you like.