110A 30kV contactor

[Doctorbass]

Today i was searching for a switch/contactor able to hold 100A peak for my ebike and that can have contact for DC voltage like 100V.. not easy to find i admit!!

I finally found the LEV200 from Kilovac that is a great popular switch for EV.. but it cost around 130$..

Then i remembered that in one of my multiple electronic stored boxes that i had a strange switch.. or SCR made in porcelaine that had KILOVAC writed on it..

So i deciced to find what is the spec for it.. and i found that this great switch can handle 110A at .... i say: 30 000V and that at 30kV 30A it can switch to 32MHZ !!!! More than i need...

But the important thing in this story is that i solved my arcing switch problem!!!.. I completly welded 3 switch on my bike since it is at 100.8V :lol: ..

http://relays.tycoelectronics.com/datasheets/kc20_30.pdf the KC-20

NO MORE PROBLEME!!!!

only 9 oz !! vaccum type!

and up to 30 000V.!!.. hummm.. ebike!!!.. 5305... ... ok..ok.. i'll keep 100.8V


but... it is writen that it's a "No Load Switching" type.. :| .. does it meanthat i can not carry current when changing the state of this relay?

Doc

 

[Link]

Hmm...If I had to guess, I'd say it's not made for switching under load, ESPECIALLY since it's got copper contacts. I think the ones made for load switching are usually coated in silver oxide.(?)

FWIW, if you use a precharge resistor, I think it would be okay to use, since then it wouldn't have to deal with that huge current surge when the capacitors charge.

 

[TylerDurden]

Ja Doc, don't switch under load... it could weld closed. As Link said, high power contactors use silver points and magnetic blowouts to reduce arcing. Precharge resistor is strongly suggested.

http://www.endless-sphere.com/forums/viewtopic.php?f=2&t=4611