no i dont think he has tried this yet however the pannel is reported as 'dead'.
insulation resistance tested ring veritas 8 still connected
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If it is now dead then likelyhood is that it has lost its mains supply, could be a fuse inside the panel or something else. The backup battery has now run down and the panel has died. I don't think the veritas 8 loses its memory on power off so you shouldn't need to re-program it. It is recommended after deep discharge that the backup battery is replaced.
I take it they didn't have a battery backed bell box as that usually goes into alarm for 20mins when the panel dies.
The green light flashes when mains is lost, and will stop altogether when the battery in the panel goes flat.
You should not be carrying out IR tests between L&N>E as standard. You should test each conductor to each other.
A simple continuity test will usually show up a hidden load without damaging it.
No there was no sound from the bell box when power stopped. i did conduct the insulation tests between live conductors and then live conductors to cpc so i have probably increased the chance of damage!! as i had no reason to believe and any loads were still connected
However as rightly pointed out i should have took more time visually inspecting first.
The consumer unit was poorly labled ( red insulation tape " upstairs ,living room , dining room) the alarm was in the utillity room. (still my fault though)
I have sent the customer all the fuses for the panel which he will try then get back to me to see if i need to replace the panel , c.e.f. do them for 38.00 plus vat.
thx again for all your help guys a lesson has been learned ;0)[/b]
Okay it is "inverted" to 500V you still get the voltage through the transformer though otherwise when I was at skool I would not have been able to use a 9 volt battery a buzzer and a hornby transformer to make a rather nasty shock machine!
12 volt coil battery buzzer 240 coil couple of long wires bare at the end press into someones hand. Did even more damage with a capacitor Mum slapped me around the face though if I realsied what I was onto would have got to the tazer .......
Never taken a modern megger to bits, dunno if they use transformers or voltage doublers to make up the 500v.
You can use something like a square wave to run a transformer, as long as the current is constantly changing. With DC only the initial pulse will give a voltage on the output.
Went back to customer today sure enough his panel was dead...but no voltage TO fused spur either... further investigation revealed the alarm was not even on the ring. it just so happened that the protek 6 amp mcb which supplied alarm had failed to 'close' when switched back on.
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