Hi ruck,I got a "package" deal from a now defunct EV supplier who no longer responds with tech help. They sent 2 kilovac contactors. I know 1 goes between the bat and the controller for use with the key/ignition switch. (zilla hairball)
The 2nd contactor goes where? Here are possibilities I came up with:
1. place next to contactor 1 as a panic/emergency button on dash.
2. powers up the dc-dc convertor. (but why not use a regular switch for that?)
3. placed halfway through the pack and also hook to the key/ignition. (I find this unlikely in a 96v 260ah TS lifepo4 pack)
Which is correct? I am thinking the emergency button.
What do you think?
It sounds like others have eliminated problems by putting a separate switch on the dc-dc. Turn on the hairball first using the contactor, then switch on the convertor? This also sounds like it allows the car to be switched off completely for long-term storage without bat drain. Am I on the right track?
Also, are the "snubbers" on the contactor sufficient to slow the rush to fill the controller capacitors or do I need other precautions. I seem to remember seeing somebody put a resistor or something similar on the circuit to slow it down. Ideas?
Ideas? Read the manual http://cafeelectric.com/downloads/HB202.pdf
Page 23 has a nice schematic. Where it shows a disconnect, you could use the other contactor, or put it in the battery negative feed.
The hairball does the precharge, no external resistor required.
If you have the Kilovac EV200 contactors, there are no snubbers. But probably the coil economizer circuits. http://relays.tycoelectronics.com/datasheets/ev200.pdf