I've connected a relay to one of the AUX inputs on my EasySolar-II GX to control the AC OUT 2 relay, thus overriding the default behaviour of AC OUT 2 (ie. load shedding when AC input is not available).
My relay allows me to force AC OUT 2 on (after checking load will be low enough of course) during an outage of AC IN.
I also want the default behaviour (that AC OUT 2 is disconnected when AC IN is lost, and that it is reconnected after AC IN has been available again for a given time).
To that end, I have two programmable relay assistants configured, one to turn the AC OUT 2 relay off, and another to turn it on, I have them configured as follows:
1. Programmable Relay
- Use ACOut 2 relay
- Set relay off
- When AC1 not available for 0 seconds
This assistant above works fine, the load is shed as expected if AC IN fails.
2. Programmable relay (1)
- Use ACOut2 relay
- Set relay on
- When AC1 available for 120 seconds
- When auxilliary input 2 is closed for 0 seconds
This is not working as expected - the part about aux2 works fine (the external switch controls the relay and AC OUT 2 can be forced on during an AC IN outage), but the part that should turn AC OUT 2 back on after AC IN has been available for 120 seconds is triggered too quickly.
What happens is that AC OUT 2 switches on exactly 120 seconds after mains power on AC IN is restored, NOT 120 seconds after this power has been accepted by the EasySolar.
What I mean is that, in VeConfigure, I can see the blue bar on the left (or under the popout bigger VE. Bus Monitor window) ticking across as the quality of the mains power is assessed by the system prior to accepting it.
After 120 seconds, even though the mains power has not yet been judged to be of appropriate quality to be accepted (this time can vary in my installation up to some tens of minutes), the AC OUT 2 relay will close. In actual use, what will happen as a result is that the sheddable loads on AC2 will be powered again before the AC IN power has actually been put on the bus, and so the inverter could be overloaded and shut itself down.
The delay specified in the assistant should be from when the power is accepted, not when it is first connected.