ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Electrode boilers question
by annemarie1. 04/27/17 01:40 PM
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
Dimmable LED 2x4 lay in fixtures
by HotLine1. 04/24/17 05:43 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,842 Are you busy
169,616 Re: Forum
162,870 Need opinion
Who's Online Now
0 registered members (), 75 guests, and 6 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#204272 - 11/25/11 03:03 PM Automating Manual Gen Transfer Swtich...  
johnmixdecn  Offline
New Member
Joined: Nov 2011
Posts: 1
NY
Hi all. I have a setup with a diesel genset. This genset feeds a 3 phase panel (120/120/120). This panel has 4 double breakers, each feed a single phase panel, each of which has a manual transfer switch that switchs the panel between line power and the 3 phase gen panel. This has worked well for years.

What im looking to do is to automate this. Installing 3 auto transfer switchs is beyond my budget.

What im thinking is I will write a program that runs on a dedicated PC (on battery backup of course) that will watch the incoming power, and when we lose power, or a even lose a single phase...it will start and warm up the genset. Then it will wait a few minutes then flip each transfer switch over. I have writen a similar program for a smaller application that was in a communications shed in the woods. It worked great.

This is where my question comes in. Would it violate code in any way to have an electric actuator push/pull the handle of the transfer switchs from "Line" to "Gen"? I cant see how it would since this is external from any electrics and is doing this same thing as a human fliping the switch.

--John


Work Gear for Electricians and the Trades

#204273 - 11/25/11 04:20 PM Re: Automating Manual Gen Transfer Swtich... [Re: johnmixdecn]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,069
Estero,Fl,usa
When you change a manual transfer switch to automatic (any way you do it) you do bring in the requirement that the generator now must be capable of maintaining the entire connected load.
Does your program do load management?
Other than that you might bump into 110.3(B) about using equipment the way the manufacturer's instructions specify.



Greg Fretwell


Member Spotlight
RH1
RH1
California
Posts: 22
Joined: August 2009
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.011s Queries: 15 (0.004s) Memory: 0.7443 MB (Peak: 0.8599 MB) Zlib enabled. Server Time: 2017-04-28 02:23:25 UTC