Guest Posted June 23, 2006 Posted June 23, 2006 So, I just measured from the panel, current is 1.07A. how meter? wintex? or voltage? assume still in day? say 350 - 450 mA for a single sab / strobe whoops overloaded & thats before we look at extension speakers. Bloody hell Lurch, keep your hair on. the mans busy tearing his hear out with sheer frustration
Guest heliart Posted June 23, 2006 Posted June 23, 2006 OK, so I've had a good look at this today - Now, please remember this in a DIY install, but I'm not stupid. 12v out of the main PSU is just over 1A, this is measured with oscilloscope and current clamp, running an average sample over about 3 seconds. I did spec the current on paper before the install, and as a result I actually made the install easy to split off half of the external stuff and run that on it's own 12v, so I'm going to look at doing this. Please, can I ask a question without having my head bitten off? Who makes a good wall mounted 2A 12V PSU, wall mounted, battery backed with tamper? http://www.ktassemblies.co.uk/index.html these guys seem to do just the right thing, but unsure of the cost. Any suggestions?
Guest Posted June 23, 2006 Posted June 23, 2006 Texecom do a 2A PSU, maybe try your supplier of the panel?
Guest Yaka Posted June 23, 2006 Posted June 23, 2006 Hi, I've just had a look for a Texecom munual but I can't find it so I'm going of memory a bit, I'm not saying your oscilloscope and clamp meter arn't accurate but I sure the fuse rating on your Aux is only one amp and 2 x 7.0Ah batterys is probably to big for the charging circuits so they will of gone flat so quick because they were not fully charged. For a OK PSU available to public try City Electrical Factors. Just out of curiosity unless you found some Tardis style panel how did you fit two 7.0Ah battery?
Guest Posted June 23, 2006 Posted June 23, 2006 12v out of the main PSU is just over 1A, this is measured with oscilloscope and current clamp, running an average sample over about 3 seconds. current reading with a clamp meter?? the ac or the dc?? are we talking a proper low current clamp meter?? may be an idea list all the items wired on on install do you know how to fit the power supply Just out of curiosity unless you found some Tardis style panel how did you fit two 7.0Ah battery? :hmm it will take a 17Ah battery would this en50131 have anything to with bigger battery but I sure the fuse rating on your Aux is only one amp yes you may be right but..... theres a bell fuse, a battery fuse, a network fuse ect...... total dc loading is 1.5Ah but you not meant to use evenhalf that much are you???
Guest Yaka Posted June 23, 2006 Posted June 23, 2006 current reading with a clamp meter?? the ac or the dc?? are we talking a proper low current clamp meter??may be an idea list all the items wired on on install do you know how to fit the power supply it will take a 17Ah battery would this en50131 have anything to with bigger battery it will take a 17Ah battery would this en50131 have anything to with bigger battery Ahhhh! Not fitted one since 2000'ish
Guest Posted June 23, 2006 Posted June 23, 2006 Ahhhh! Not fitted one since 2000'ish its always been the same box are you thinking of the vertias?
Guest Posted June 23, 2006 Posted June 23, 2006 ... but I sure the fuse rating on your Aux is only one amp and 2 x 7.0Ah batterys is probably to big for the charging circuits so they will of gone flat so quick because they were not fully charged.... are you trying to say that due to heavy load on AUX supply the PSU doesn't have anything left to battery charging circuitry..?
Guest Yaka Posted June 23, 2006 Posted June 23, 2006 are you trying to say that due to heavy load on AUX supply the PSU doesn't have anything left to battery charging circuitry..? Dosnt matter now I'm talking rubbish I was thinking of a totaly different panel
Guest heliart Posted June 29, 2006 Posted June 29, 2006 I thought I would post a follow up to my issue, to aid other DIY installers. My initial problem was found during an AC fail, where the main batteries would not power the system. I initially thought the problem was related to battery performance etc, but after doing some analysis, I found the issue was that the 1.6A poly fuse was going once the batteries were in circuit. Now, this was a bit of an eye opener, and I went back and analysed the current requirements of my entire system. 12v current was just over 1A at idle, so I can only assume the fuse was going due to some surge when the batteries are put in circuit. I've now installed a monitored battery backed PSU (Texecom PSU200), and pulled off about 700mA from the main panel. Everything now works as I originally planned. I think for a DIY installer, you need to pay much more attention to power/current requirements. I was surprised by my problem, and in all my research prior to specifying my installation I never came across any advice, or comments on the use of external PSU's. If some other DIY installer learns by this, then that's fantastic, and surely the entire purpose of this DIY forum!!! Finally, I just wanted to state that I had two main reasons for doing a DIY install in the first palce:- 1. I installed exactly what I wanted, and I was able to introduce some custom electronics into the whole system. The professional installers I talked to would not even entertain talking about that. 2. Great satisfaction by installing a system that I know inside out. It was a great learning exercices, even though I'm trained in electronics and electronic engineers.
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