Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 04-13-2011, 11:47 AM   #21
Senior Member
 
David472's Avatar
 
Join Date: Feb 2011
Location: SW Ontario
Posts: 1,393
Westom, yes, your explanation is in-line with my suggestion, which is, the popular surge protectors aren't what many people expect.

Progressive industries does sell a surge protector model SSP-30, which plugs into the pedistal, then you plug your RV into it. They sell for $99. I'm afraid to ask the price in Canada This item would equal the Cutler-Hamer unit you mentioned.
__________________

__________________
Jayco Eagle 31.5RLDS
GMC Sierra 2500 HD
David472 is offline   Reply With Quote
Old 04-13-2011, 06:15 PM   #22
Site Team
 
Crabman's Avatar
 
Join Date: Nov 2010
Location: Virginia`s Eastern Shore
Posts: 14,654
Moving right along now, I don`t even have a surge protector yet! I may have to put one on my wish list. One of Crabman`s many wants and needs.
__________________

__________________
2017 Coachmen Catalina 283RKS
2004 Chevy 2500 HD CC 6.0l
2010 Jayflight 28BHS (sold)
Crabman is offline   Reply With Quote
Old 04-13-2011, 06:17 PM   #23
Senior Member
 
Terry's Avatar
 
Join Date: Feb 2011
Location: Germantown, TN
Posts: 4,923
Great discussion and info!

So jwmmck -- hope you got your question answered - or at least a good amount of varied opinion and info so you are able to make an informed decision. You will find a lot of good discussions on these types of topics.

Be safe out there playing with electricity! Remember it is not the volts, its the amps
__________________
Terry
2009 Jayco 26BH
2004 Chevy Silverado 1500
2009 JayFlight Manual Library

Want to add a signature to your posts? --> Click Here
Terry is offline   Reply With Quote
Old 04-13-2011, 06:35 PM   #24
Senior Member
 
David472's Avatar
 
Join Date: Feb 2011
Location: SW Ontario
Posts: 1,393
First, I don't mean any ill-will,
So, in the interest of engineering accuracy, you will see in the attached thumbnail, for the V130LA20B MOV, when voltage reaches 350 volts, the MOV will be drawing about 30 amps (that much clamping action). If this event duration last for more than a few milli-seconds, which it could, this extra MOV current draw through the main breaker, will trip that breaker. Power dissipation ability of the MOV must be matched to the expected energy content (watt-seconds) of sustained over-voltage, until the main breaker opens up. The two will work in harmony. Note that, in the case of a direct lightning strike, this system is only marginally helpful. Mighty Thor has too much power available.
Attached Thumbnails
scan0001.jpg   scan0002.jpg   scan0003.jpg  
__________________
Jayco Eagle 31.5RLDS
GMC Sierra 2500 HD
David472 is offline   Reply With Quote
Old 04-14-2011, 07:35 AM   #25
Senior Member
 
David472's Avatar
 
Join Date: Feb 2011
Location: SW Ontario
Posts: 1,393
Since the orginal post was about voltage regulation, here is a link to an industrial product which truly does regulate an AC supply source. That is, it will boost a steady low voltage condition, or reduce a steady over voltage condition, under load. The company is called Sola.

http://www.solahd.com/products/power...g/mcr_hard.htm

For the RV world, the AC supply protection devices typically seen, only shut down in a low voltage or over voltage situation. That approach is not regulation, but rather is protection. See Progressive Industries link.

http://www.progressiveindustries.net/ems_hw30c.htm

I think I have said enough on this topic.
__________________
Jayco Eagle 31.5RLDS
GMC Sierra 2500 HD
David472 is offline   Reply With Quote
Old 04-14-2011, 06:15 PM   #26
Junior Member
 
Join Date: Apr 2011
Posts: 12
Quote:
Originally Posted by David472 View Post
So, in the interest of engineering accuracy, you will see in the attached thumbnail, for the V130LA20B MOV, when voltage reaches 350 volts, the MOV will be drawing about 30 amps (that much clamping action). If this event duration last for more than a few milli-seconds, which it could, this extra MOV current draw through the main breaker, will trip that breaker.
OK. 30 amps creating 350 volts for 20 milliseconds means the MOV is degraded on a first surge (see datasheet charts). Anything longer will probably create 'completely unacceptable' catastrophic destruction. I cannot say more because a transient that long is not even listed in those charts. Transient that long violates what MOV manufacturers intend. And may create a human safety issue.

Meanwhile, a 30 amp transient on a 20 amp circuit takes between 20 and 200 seconds to trip (numbers for various Square D 20 amp breakers). The MOV would have vaporized in flames before that circuit breaker even thought about tripping. That was my point. MOVs are not installed to trip circuit breakers or fuses.

MOVs are thermal fused. A 30 amp transient through an MOV causes an unacceptable (catastrophic) failure that endangers human life. A tiny thermal fuse would disconnect the MOV long before any fire and before any circuit breaker tripped. An effective surge protector is for transients that are hundreds or thousands of amps. And that occur in microseconds.

Surge Guard is a switch that disconnects from AC mains if prolonged AC voltage exceeds (for example) 132 volts.

MOV protector and the Surge Guard are for two completely different events. MOV based protector is for a microsecond transient. And requires a short connection to earth ground. The second is for an anomaly that may occur for seconds or hours. And does not require any earth ground.

Bottom line: Not listed are solutions for other anomalies such as power factor, frequency variation, harmonics, neutral failures, rapid power cycling, etc. For RV shore power, Surge Guard addresses a most common problem. A surge protector at the pedestal addresses a different and rare anomaly that is also so catastrophic. Two completely different solutions for two completely different problems.
westom is offline   Reply With Quote
Old 04-14-2011, 06:26 PM   #27
Senior Member
 
Terry's Avatar
 
Join Date: Feb 2011
Location: Germantown, TN
Posts: 4,923
Man...I am a pretty technical person, but you guys are taxing my brain lol!

I am going to stick with my Flux Capacitor. If my camper ever hits 88, watch out!
__________________
Terry
2009 Jayco 26BH
2004 Chevy Silverado 1500
2009 JayFlight Manual Library

Want to add a signature to your posts? --> Click Here
Terry is offline   Reply With Quote
Old 04-14-2011, 07:10 PM   #28
Member
 
Join Date: Jan 2011
Location: Carteret, N.J.
Posts: 30
Thanks to all

for the input.... Think I'll grab one of these...


http://www.campingworld.com/shopping...egulators/7507
__________________
2010 Eagle Superlite 314BDS

2008 Ford F-250 Crew Cab
6.4 Turbo Diesel 4:10 rear
Reese Dual Cam
Tekonsha Prodigy
jwmmck is offline   Reply With Quote
Old 04-14-2011, 07:14 PM   #29
Member
 
Join Date: Jan 2011
Location: Carteret, N.J.
Posts: 30
And....

maybe one of these.............................



http://www.campingworld.com/shopping...rge-guard/2279
__________________
2010 Eagle Superlite 314BDS

2008 Ford F-250 Crew Cab
6.4 Turbo Diesel 4:10 rear
Reese Dual Cam
Tekonsha Prodigy
jwmmck is offline   Reply With Quote
Old 04-14-2011, 07:30 PM   #30
Senior Member
 
bertscampers's Avatar
 
Join Date: Mar 2011
Location: Southwestern Ontario, Canada
Posts: 119
I am really trying to follow these posts but am struggling. I am picking up my RV in a week. I am not sure what I need to get to protect my trailer. Surge guard or surge protector. If I get nothing what then? I am just trying to understand.

Thanks for all the help.
__________________

bertscampers is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 05:03 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.