siemens and hummer controller

[Blaine Becker]

HI.
Is it possible to up the voltage on the dump contorller from 294 to 550.
my inverters can handel more but the controller is braking at around 294.
siemens controller and 10kw hummer

[Rob Beckers]

Hi Blaine,

If he doesn't reply to this thread, send a Private Message (left side, see the menus) to Cor van Houten. He's the resident expert on Hummers and their controllers, and can tell you how to change the settings in there (and if that is a good idea or not).

-RoB-

[Blaine Becker]

Thanks ROB
There are switchs in contoller to set the voltage.So i set it to 309 volts and now inverter will hit 4800 before brake starts.
I have to aurora 6000 and they will not work together,which ever fines the grid first the other one goes on ground Fault.is the riso not shut off.



Blaine

[Rob Beckers]

You'll have to find and fix that ground fault first. In all the cases we've looked at the ground faults are real, and not some artifact caused by the inverter: Something on the DC side of the inverter (ie. the wind turbine, controller, rectifier etc.) is referencing ground, leaking current, and setting off the ground fault on the inverter.

The Aurora inverters are transformerless. This has advantages, but the one disadvantage is the DC input has the grid voltage (220 or 240V AC) superimposed on it, and that means the DC source (your wind turbine) has to be floating with respect to ground. Any reference to ground on that side will set up a large current to ground, and the inverter has to switch off.

The other one to be aware off is that I've seen many, many Aurora inverters destroyed because the DC input voltage exceeded 600V DC. You have to be very certain this will never happen, especially if you are considering raising the voltage at which the dump load switches on.

-RoB-

[Cor van Houtum]

the hummer controller is using the dc and ac input at the same time
put a small diversion trafo in between the power line (grid)
problem solved

kind regards

Cor

[Blaine Becker]

Thanks Cor
When I got into this game I never dreamed it was going to be anything like this.
there is no one answer for any given problem.But we've been makeing sense of stuff that was completely foren to us.
so far the hummer generator has been great.the system has been working now for three days with out a GFI so hope it stays


Blaine

[Cor van Houtum]

Blain,
we have had the same problem
you need to set the riso off in the second inverter

remember when you change the setting to riso off
and safe these settings it should be ok
but everytime you change the curve in this inverter the riso will be going on again
so the last thing to do is change the riso to off position

I am not sure if this is a standard bug or is related to a certain firmware revision

cor