Yeah, I have had this exact thing bite me in the butt before.
From: Bill Prince
Sent: Friday, December 28, 2018 11:00 AM
To: [email protected]
Subject: Re: [AFMUG] DC Breakers
I prefer to use 2-pole breakers for the batteries. Often, single-pole breakers
are polarity sensitive, and since the batteries are both a source and a sink,
the polarity will reverse depending.
bp
<part15sbs{at}gmail{dot}com>
On 12/28/2018 9:50 AM, Ken Hohhof wrote:
Carling is another manufacturer of DC breakers.
The Altech V-EA series (part numbers end in UM) are rated 80VDC for the lower
amp ratings and 42VDC for the higher amp ratings. They are actually made by
Sursum, in Germany maybe, and are sturdier than other Altech breakers. For
high current applications, like protecting large battery strings, I use a dual
pole breaker for both sides of the batteries, this increases the DC voltage
rating because you are interrupting the current in 2 places at once.
From: AF mailto:[email protected] On Behalf Of Bill Prince
Sent: Friday, December 28, 2018 10:37 AM
To: [email protected]
Subject: Re: [AFMUG] DC Breakers
We get breakers that are specifically DC rated for the current we need. If
they are DC rated, they will also indicate the maximum operating voltage
(typically 48 volts) but you sometimes see higher voltages. Just be sure the
ones you get are rated above the voltage you'll be using them at. 2X is a good
place.
bp<part15sbs{at}gmail{dot}com> On 12/28/2018 7:37 AM, Jason McKemie wrote:
Do you generally size these about double the expected load?
I see a lot of them rated at higher voltages than I need, will these still
be effective?
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