The resistors measure 11.2 to 11.4 ohms between L1-L2, L2-L3 and L1-L3 disconnected from the controller.
Good.
Much better than "3, 20 and 30 ohms."
I tried the dump load on at 12 volt dc and got nothing. It started to produce some heat at 36vDC so it must be working.
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A load like that is not going to make much heat at 12V.
A tap off a single battery
I do not like that concept. Too many variables are not included in tapping a single battery. Avoid it as much as possible.
RossW is correct. Maybe the statement about "A" could be misinterpreted, and I may not understand it myself!
A dump load controller would enough for the controller. Or a secondary back-up controller.
The controller would be controlling other items,
(as Ross said, "Using a dumpload controller to pull in a decent contactor or relay on the 3-phase AC side bypasses a host of problems associated with switching high voltage DC.")
Using a dumpload controller to pull in a decent contactor or relay on the 3-phase AC side bypasses a host of problems associated with switching high voltage DC.
RossW,
What do you think about replacing the supplied relay... then adding a parallel (parallel coil) relay (or 2 relays in a 'Darlington concept' configuration)?
The addition driving an additional and smaller load configuration on the 3-ph AC side?
I thought it may reduce the make and/or break load on the contacts.
May add a bit of redundancy, even if not as much as the factory load.
=OR=
What if the factory relay was replaced, and used to drive a 3-ph motor contactor, which drives the 3-ph load?
I did not look up the factory Omron relay.
Hope the storm doesn't do any damage.
As I was typing my last reply, I heard the breezeway rear storm door open and close a couple times.
I thought I should go latch it correctly.
Then I heard 'extended' breaking glass. It slammed shut and broke a window.
Nothing I can do about that at the time?
Later, the broken window let in enough wind to blow out another window on the opposite side.
It was windy here.
I am not comfortable with the ghurd controller at 96VDC.
G-