Re: [RE-wrenches] Radian AC inputs

[Ray]

To add to this point,  a customer inadvertently wired a 100 amp 240 vac 
Tesla charger circuit into an Outback backup system.  We later had to 
rebuild the inverters because they had cooked the 60 amp rated transfer 
relays.  The 50 amp breakers had tripped occasionally, but apparently 
not enough to save the relays.  The relays were not completely gone, but 
were no longer reliable.


Ray Walters
Remote Solar
303 505-8760

On 8/8/19 2:14 PM, Lones Tuss wrote:


I happen to like the 50 amp breaker as it should trip before the 
relays get stressed.


I hope this helps.

Take Care All


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Re: [RE-wrenches] Radian AC inputs

[Lones Tuss]

Hi William
Sorry for the delay in getting back to you.
Good catch on the observations in the Radian Quick Start Guide.

Link to Quick Start Guide
http://www.outbackpower.com/downloads/documents/inverter_chargers/radian_8048a_4048a/gs_8048a_4048a_quick_start.pdf
Link to the Radian Installation manual
http://www.outbackpower.com/downloads/documents/inverter_chargers/radian_8048a_4048a/gs_8048a_4048a_install.pdf


The QST statement

Only one AC source can be wired at a time;  use an external selector switch if 
more than one source is available.”

Is incorrect.
All Radian Inverters have 2 ac inputs, an external selector switch is 
unnecessary. That almost has to come from the FX inverters.
I have notified the Technical Manual Writer and he will change that .
Thank you

On the other observations I will have to split hairs.
The easiest first.
In the Quick start Guide
We do recommend #6 AWG THHN copper wire
under the heading
AC Wire Sizes and Torque Values


In the Quick Start Guide
Under
AC Wiring Notes
It is stated:
The Transfer Relay is rated 60 Aac….
Then recommends   up to a maximum 60 amp breaker.
This is not a false statement.

In the Radian Installation Manual
On Page 38 it is stated:
All overcurrent  devices in Permanent Installations must be sized for 50 Aac or 
less.

So perhaps a little history
The relay is the same ac input relay that was used on the Trace SW inverter, 
and on the Xantrex  SW and SW + Inverters.
It is rated at 60 amp pass through. In the GS installation manual we state a 50 
Amp breaker because that is what we use in the GS load centers.
Throughout OutBack’s history the ac breaker size has changed between 50 and 60 
amps.
The relay itself has not changed.
I happen to like the 50 amp breaker as it should trip before the relays get 
stressed.

I hope this helps.
Take Care All









From: William Miller 
Sent: Tuesday, August 6, 2019 6:51 PM
To: RE-wrenches 
Cc: Lones Tuss 
Subject: Radian AC inputs

** [EXTERNAL EMAIL] - Please report any suspicious attachments, links, or 
requests for sensitive information to the Help Desk. **

Friends:

I was wiling away the time perusing a Radian (GS4048/GS8048) quick-start guide 
that came with a recently acquired set of Radians.  I was quite surprised to 
see the AC inputs, outputs and throughputs are shown in the quick-start guide 
as rated at 60 Amp AC. The guide also indicates a minimum wire size of #6AWG 
(does not specify CU or AL, will assume CU).

I always remembered that rating to be 50 Amps AC.  I checked old and new 
installation manuals and they all say 50 Amps AC.  Am I missing something?

The guide also says:  “Only one AC source can be wired at a time;  use an 
external selector switch if more than one source is available.”  It really 
sounds like this section was cut and pasted from an FX/FXR manual by mistake.  
Anyone catch this?  Lones, you out there?

William


Miller Solar
17395 Oak Road, Atascadero, CA 93422
805-438-5600
www.millersolar.com
CA Lic. 773985

Quote of the month:  “As they age, batteries transition from energy
storage devices to energy consuming devices.“ W. Miller

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[RE-wrenches] Radian AC inputs

[William Miller]

Friends:



I was wiling away the time perusing a Radian (GS4048/GS8048) quick-start
guide that came with a recently acquired set of Radians.  I was quite
surprised to see the AC inputs, outputs and throughputs are shown in the
quick-start guide as rated at 60 Amp AC. The guide also indicates a minimum
wire size of #6AWG (does not specify CU or AL, will assume CU).



I always remembered that rating to be 50 Amps AC.  I checked old and new
installation manuals and they all say 50 Amps AC.  Am I missing something?



The guide also says:  “Only one AC source can be wired at a time;  use an
external selector switch if more than one source is available.”  It really
sounds like this section was cut and pasted from an FX/FXR manual by
mistake.  Anyone catch this?  Lones, you out there?



William





Miller Solar

17395 Oak Road, Atascadero, CA 93422

805-438-5600

www.millersolar.com

CA Lic. 773985



Quote of the month:  “As they age, batteries transition from energy

storage devices to energy consuming devices.“ W. Miller
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