[RE-wrenches] Quantifying power quality

[Kevin Pegg]

Something we have done in similar situations is wire in a small, dedicated 48V inverter to run the sensitive loads. Always in invert mode never charging so gen power never touches it. It's way more efficient as well than having an inverter charging an UPS battery. It could of course also be a dedicated larger inverter if the loads demanded. 

At our off-grid shop we have a dedicated Exeltech inverter that runs servers, phones, alarm, cameras, etc. Works very well. 

In remote sites we typically power all the comms up by dedicated system like this. Gives us an opportunity to diagnose and or resolve remotely should the main power be offline for any reason. 

Kevin

-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org]On
Behalf Of William Miller
Sent: October 12, 2014 12:34 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Quantifying power quality


Friends:

The system is off grid with:
3 SI6048s in 3 phase
2 SB5000s
1SB4000
1 Generac 40kw generator
A Savant home automation system with
Furman 1500 UPS. 

Yes, when the SIs are running into the Furman we have cascading UPSs, but when the generator is powering loads it transfers straight through the SIS and then it is not cascading UPSs.

I would hope the Furman could "play nice" with the SIs and maybe it can. If indeed power quality from the SIs is acceptable, maybe we can program the Furman to be more accepting, or just shut off the beeper and email alarms and let it performed its intended function in silence. 

I will evaluate if alarms are more prevalent during gen run or non-gen run. I will also contact Furman.

Thanks for the feedback. 

William

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