| Author | Message | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1494 Registered: 10-2006 Posted From: 69.19.14.18  Rating: |
"Living well in a dump" was my tongue in cheek name for an article I wrote about a decade ago ,, a short piece on the concept of Load Shedding. Living large with only 15A service , is easily done with a couple of relays , the ones I used were from Grainger's. Now I'm trying to find that majic Grainger parts number or article to no avail. Since that was 3 computers ago , looking in my file is not an option. Anyone still using Load Shedding to help in poorer campgrounds? FF | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2056 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
did you bring up their site to find them? | ||
| Sean Welsh (Sean)
Registered Member Username: Sean Post Number: 1251 Registered: 1-2003 Posted From: 67.142.130.34  Rating: N/A |
Fred, We have such a load-shedding system. I used relays I had lying around, but there are several suitable types on the market. I have never found Grainger to be particularly competitive; you can get these from Del City and other suppliers for less. What rating are you looking for? -Sean http://OurOdyssey.BlogSpot.com | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1318 Registered: 3-2007 Posted From: 71.55.183.81  Rating: N/A |
Mcmaster-car also has switches. sometimes pricey but available. Gomer | ||
| Pete/RTS Daytona (Pete_rtsdaytona)
Registered Member Username: Pete_rtsdaytona Post Number: 643 Registered: 1-2005 Posted From: 184.88.99.113  Rating: N/A |
Would these work ???? http://www.surpluscenter.com/item.asp?item=11-2418&catname=electric or http://www.surpluscenter.com/item.asp?item=11-3121&catname=electric | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1495 Registered: 10-2006 Posted From: 69.19.14.32 Rating: N/A |
As I remember the relays were all 120V at least 15A rated (20A?) and used 120v to pull the coil. They were configured when sold as NO (normally open) but a simple parts flop and they could be configured as NC (normally closed). This way they were ideal as something like the HW heater could be on as long as it desired EXCEPT if the control wire from the fridge compressor became hot., then the relay would open, shedding the HW heater load. Scanning the Archives it seems the article was in Pete's archive for a short time. FF | ||
| Pete/RTS Daytona (Pete_rtsdaytona)
Registered Member Username: Pete_rtsdaytona Post Number: 646 Registered: 1-2005 Posted From: 184.88.99.113 Rating: N/A |
could they be --> Potter-Brumfeld PRD11dy0-110 http://cgi.ebay.com/POTTER-BRUMFIELD-PRD-11DY0-110-NSFP-PRD11DY0110-/230550762461 http://www.onlinecomponents.com/pb-tyco_prd-11dy0-110.html?p=12111005 | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1500 Registered: 10-2006 Posted From: 66.82.9.81 Rating: N/A |
Thanks Pete , I looked at the spec sheet and I can't find out if they can be set to NC (normally closed) to open when a signal is sent. This is required for Load Shedding to work. Current cap is fine , as is the price. FF | ||
| Pete/RTS Daytona (Pete_rtsdaytona)
Registered Member Username: Pete_rtsdaytona Post Number: 647 Registered: 1-2005 Posted From: 184.88.99.113 Rating: N/A |
Fred These are DPDP - so there are 2 sets of BOTH N/O and N/C contacts connections They can be wired either way without fliping contacts | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1501 Registered: 10-2006 Posted From: 69.19.14.32 Rating: N/A |
Thanks Pete , that will work! For those that have not heard of Load Shedding , it is an easy concept. When in a site that has very limited power power on board AC users are staged. The HW heater would be in all the time , BUT, when the fridge needs power ,a wire from the fridge motor activates the relay , and the HW heater goes off. When the fridge finishes , the power to its motor stops , and the relay allow the HW heater to go back on. It works seamlessly after you set it up. The possibilities are almost endless. FF | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 1480 Registered: 7-2006 Posted From: 97.225.132.115  Rating: N/A |
Good stuff folks....thanx for that!  RCB |
