[SML] Relays vs. Traditional Circuit Breakers for LED Power.

[tech dept]

OK, relays (err contactors) for blocks of breakers and not individual breakers, that is more practical.
What is the "inrush" current of the instruments you plan on using, how many lamps per circuit breaker, how many circuit breakers (total), and will you have have designers capable of not exceeding the breakers rated ampacity during power-up of the instruments?
The only time I would be concerned would be right after a power outage and full power would restored to ALL the instruments at one time with breakers loaded to capacity.
Seems to me there was a sold out stadium in St Louis that had this problem (never found out how they corrected the problem but they were down to emergency lights while their cold strike lamps had to cool). Bad analogy but a maxed out system trying to charge ALL the power supplies could continuous keep re-tripping.


> -----Original Message-----
> From: stagecraft at theatrical.net
> Sent: Wed, 10 Aug 2016 22:29:52 -0500
> To: stagecraft at theatrical.net
> Subject: Re: [SML] Relays vs. Traditional Circuit Breakers for LED Power.
> 
> They're suggesting "sequenced circuit breaker panels," and/or
> "relay-type dimmers."
> 
> On Wed, Aug 10, 2016 at 10:28 PM, Kristi R-C via Stagecraft
> <stagecraft at theatrical.net> wrote:
>> I suspect your suppliers are suggesting "breaker" as opposed to
>> "dimmers"
>> for the LED fixtures and the confusion is in the terminology being used
>> not
>> the location or type of the breakers themselves.
>> 
>> Kristi R-C
>> 
>> 
>> 
>> ---- Original Message ----
>> From: tech dept via Stagecraft <stagecraft at theatrical.net>
>> To: Stagecraft Mailing List <stagecraft at theatrical.net>
>> Cc: tech dept <tech.dept at inbox.com>
>> Sent: Wed, Aug 10, 2016 10:03 pm
>> Subject: Re: [SML] Relays vs. Traditional Circuit Breakers for LED
>> Power.
>> 
>> It sounds to me like someone is trying to sell you a very exotic bill of
>> goods that you really don't need and could do much cheaper and probably
>> have
>> better reliability a more conventional way. (Standard regular circuit
>> breakers and a relay pack (though I really see no need for the extra
>> step of
>> a relay pack.) I assume all the fixtures are standard theatrical brands
>> and
>> DMX controlled. A nice large 'company switch' (AKA Bulldog) preceding
>> the
>> permanent breaker panel Is all the good night switching I would want for
>> the
>> breakers.
>> An inspector would really raise an eyebrow if you were regularly
>> switching
>> on and off the breaker for non-fault reasons.
>> 
>>> -----Original Message-----
>>> From: stagecraft at theatrical.net
>>> Sent: Wed, 10 Aug 2016 21:45:03 -0500
>>> To: stagecraft at theatrical.net
>>> Subject: [SML] Relays vs. Traditional Circuit Breakers for LED Power.
>>> 
>>> We're in the midst of looking at upgrading a significant portion of
>>> our stage lighitng to LED in the near future. As part of the
>>> exploration, vendors have suggested the addition/installation of relay
>>> controlled breakers to supply power to the various positions. One of
>>> our own University electricians asked me "why do you have to have
>>> relays, couldn't you just flip the breakers?" I didn't have an answer
>>> that I felt good about giving him, so I'm here now asking the
>>> collective -
>>> 
>>> Is there an absolute "must have" reason for the remote relays,
>>> especially given that we're looking at full rack replacement, and the
>>> installation of a new control network anyway? Access to the panel
>>> would be very convenient; it's not likely to be placed in a
>>> hard-to-reach spot. I'd really like to have a reason other than "the
>>> recommendation of the vendor is to use this."
>>> 
>>> Thanks in advance for your collective wisdom.
>>> 
>>> -RG
>>> 
>>> --
>>> Rob Graham
>>> photonguide at gmail.com
>>> 
>>> ____________________________________________________________
>>> For list information see <http://stagecraft.theprices.net/>
>>> Stagecraft mailing list
>>> Stagecraft at theatrical.net
>>> http://theatrical.net/mailman/listinfo/stagecraft_theatrical.net
>> 
>> ____________________________________________________________
>> FREE 3D MARINE AQUARIUM SCREENSAVER - Watch dolphins, sharks & orcas on
>> your
>> desktop!
>> Check it out at http://www.inbox.com/marineaquarium
>> 
>> 
>> 
>> ____________________________________________________________
>> For list information see <http://stagecraft.theprices.net/>
>> Stagecraft mailing list
>> Stagecraft at theatrical.net
>> http://theatrical.net/mailman/listinfo/stagecraft_theatrical.net
>> 
>> ____________________________________________________________
>> For list information see <http://stagecraft.theprices.net/>
>> Stagecraft mailing list
>> Stagecraft at theatrical.net
>> http://theatrical.net/mailman/listinfo/stagecraft_theatrical.net
> 
> 
> 
> --
> Rob Graham
> photonguide at gmail.com
> 
> ____________________________________________________________
> For list information see <http://stagecraft.theprices.net/>
> Stagecraft mailing list
> Stagecraft at theatrical.net
> http://theatrical.net/mailman/listinfo/stagecraft_theatrical.net

____________________________________________________________
FREE ONLINE PHOTOSHARING - Share your photos online with your friends and family!
Visit http://www.inbox.com/photosharing to find out more!