Of Mark Frye
Sent: Monday, February 02, 2015 4:24 PM
To: RE-wrenches
Subject: [RE-wrenches] How to isolate the array DC
In order to clear up the conversation...
I you put a relay in a box within 10 feet of the array on the roof, you can
use an relay with a DC rated Normally Open contact to open
-wrenches
Subject: [RE-wrenches] How to isolate the array DC
In order to clear up the conversation...
I you put a relay in a box within 10 feet of the array on the roof, you can
use an relay with a DC rated Normally Open contact to open and
connect/isolate the array DC voltage.
You can drive the coil
The inverters' input capacitors may be charged and so that must also be
isolated near the inverter.
A grid operated contactor will not work for a battery-back up system.
Also, 600V DC can weld contacts closed and if this happens and there is
no feedback to show that
the contacts
-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of Mark Frye
Sent: Monday, February 02, 2015 4:24 PM
To: RE-wrenches
Subject: [RE-wrenches] How to isolate the array DC
In order to clear up the conversation...
I you put a relay in a box
In order to clear up the conversation...
I you put a relay in a box within 10 feet of the array on the roof, you
can use an relay with a DC rated Normally Open contact to open and
connect/isolate the array DC voltage.
You can drive the coil of that relay with either AC or DC, but either
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