intermittent contact

i need to simulate an intermittent contact on a 10 amere test circuit.
0-10ohms would be about right.
Many thx
Daniel
Reply to
Danny
Loading thread data ...
sorry group, i stated the problem very badly...here it is again.. i have a load connected across mains voltage of 240v. the load draws 10amperes. I wish to simulate an itermittent connection (such as a bad switch contact or failing joint) in this circuit. has anyone any experience or knowledge that might help me. it's a little ironic that such faults often occur in practice but to design and build one....??? any ideas?
thx
Reply to
Danny
sorry group, i stated the problem very badly...here it is again.. i have a load connected across mains voltage of 240v. the load draws 10amperes. I wish to simulate an itermittent connection (such as a bad switch contact or failing joint) in this circuit. has anyone any experience or knowledge that might help me. it's a little ironic that such faults often occur in practice but to design and build one....??? any ideas?
thx
Use a relay or a solid state relay controlled by a random event generator.
Some examples of RNG circuits:
formatting link

Reply to
Tim Perry
thx, Tim, for that. i must say that thought had occurred to me...i was rather hoping for a kind of electro-mechanical solution which could simulate arcing...i am toying with the idea of a gas discharge surge arrestor in parallel with a resistor....any ideas gratefully accepted and acknowledged
many thx
Daniel
Reply to
Danny
thx, Tim, for that. i must say that thought had occurred to me...i was rather hoping for a kind of electro-mechanical solution which could simulate arcing...i am toying with the idea of a gas discharge surge arrestor in parallel with a resistor....any ideas gratefully accepted and acknowledged
many thx
Daniel
> > Use a relay or a solid state relay controlled by a random event generator. > > Some examples of RNG circuits:
formatting link
Reply to
Danny
Why not use a short length of steel or brass chain for your conductor. Attach a spring to put tension on the spring, then use a motor with a plastic cam and lever to disturb the chain intermittently.
Reply to
RFI-EMI-GUY
Would building something similar to an automotive distributor work? Go back in time to the breaker points.
----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==----
formatting link
The #1 Newsgroup Service in the World! >100,000 Newsgroups ---= - Total Privacy via Encryption =---
Reply to
Dean Hoffman
Going back in time...hmmm...now that's a thought that hadn't occurred to me...could get complicated tho'...;)
seriously tho' i'm not sure i understand what ur suggesting...sorry..anyway as soon as i need to connect it to a some sort of a rotating prime mover i'm thinking there must be a smaller. more elegant way
thx for the response anyway...
i'm starting to think 'pseudo white noise' generator (a little zener diode type gen) connected to an aluminium foil contact on a small speaker, the second contact just resting on it. also toying with a 'pseudo white noise' generator connected to an opamp buffer (ajustable level comparator) connected to a relay
any further suggestions actively encouraged and gratefully recieved
i'd a KISS design preferably
thx
Daniel
Reply to
Danny
A 10 amp arc flash is pretty hazardous to deal with.
I suggest you find a safe way to achieve your objective.
Perhaps model the conditions on a computer program
Reply to
Tim Perry
You are talking about 10A on a 240v circuit! This is not an aluminum foil solution. You are in over your head. Please hire someone with more experience to insure a safe as well as effective solution.
Reply to
Ben Miller
Benjamin,
not over my head....worked on much bigger stuff than this.
i never suggested that i was going to drive the 10 amperes thru that contact.
the salient point was a relay being driven by this (as mentioned), i realise that this would then be just a randomly generated spike rather than what i really wanted to do. but anyway i've come up with something better anyaway. thx for ur input.
Daniel
Reply to
Danny

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.