Pulse Power Switch

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#21
#24
Well, here is another type of impulse relays, better, same type other application from telemecanique. It's a impulse relay to be used in electrical instalations like corridors or stairs. it is for rail mounting, but it functions the same way of the others.

(funny I'm answering my yesterday question?!)
 
#28
"well I bought one of those relays from finder

pn 26028230

it works fine "

What happens when the power cord is un-plugged and plugged back in? Does the relay remember where it was at... or does it default to NO (or NC)

Thanks
 
#30
Is this the right way to connect momentary switch and that
impulse relay from Finder?

I'am just about to buy that relay, so I want to be sure.

bye,
mario
 

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#32
Fun with LED's

kristijan-k, do you know where I could tie in LED's into your circuit?

I was thinking one for standby and another for power indication. Would my relay need to be double pole in order to do this? I was thinking I could connect one of the poles between the standby and power led loops, while the other pole would be connected between the AC line voltage for the amp.

What do you think?

Thanks,
Wes
 
#33
GE RRx relays

These things aren’t exactly what you guys have been talking about, but I thought they might be worth mentioning here. Its a solenoid operated toggle switch made in all kinds of sizes by GE. The ones I used had three connections for the coils; a common, on and off. a 24vac pulse between common and one of the states would set the toggle switch to that state.

I’ve been able to source them from my corner lighting supply house for about $15 a piece.

They also feature low current contacts to indicate off and on positions.

http://www.geindustrial.com/cwc/products?pnlid=3&id=tlc-rely&SMSESSION=NO

They are very tough and very reliable.
 

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#38
I dont know that this is the best device for the application, but I thought I would toss it out for discussion. Most notably I could not find any reference to a DPST version that could be used for switching hot and neutral together. I like the aproaches taken by Kristijan-K and PendroPO.

These things seem to exist mostly for use in lighting control systems for large buildings. I first ran across a box full of them about twenty years ago, and the ones I found were old then. They seem to be a relatively jurassic technology, but elegant none the less. I have a large home wiring project coming up and have been thinking about using some to enable low voltage controls.I have some recollection of a wiring sheet included in the box with the relay. I also remember cutting off the Molex looking connector and spending a little time noodleing over it with a transformer ohm-meter.

The GE site tells me that there are five low voltage wires. I will submit that it one of those wires will be a common or neutral connection. The remaining four wires would have two for operation and two for indication.

For operation applying a 24VAC pulse between the common and operating line would set the switch to appropriate position: Set the switch on, and set the switch off.

The indicating lines would be two SPST closures (or one SPDT depending on where your standing). One line would be closed between common and itself when the switch was set to the on position, and one would be closed when switch was set to the on position.
 

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#39
Thanks

Thanks kristijan,
Thats exactly what I was looking for. I've been doing some research and I found this relay...

http://www.findernet.com/en/products/detail.php?codice=405290090000&lang=en&gruppo=gruppo3

This looks like it will get the job done; however, I am using it in place of the line switch for a Leach Amp.

Prof. Leach reccomends a 15 A or greater AC line switch. Although the relay above is only rated at 8A.

Question: this is 8A at 250V according to the chart right? ... so this should be 16A at 110-120 V?. 16 A at 120 V is 1920VA, which is under 2000VA. So this should work right, or am I way off?

Also it is DPDT which is what the circuit calls for right?

Thanks for bearing with me on this one, I am a rookie.

Thanks,
Wes
 
#40
Off topic or perhaps subtext:

I found this company that builds home lighting control systems that use lots of GE RR7 and RR9 relays. The house we just moved into has lots of aluminum wiring that has all got to go.

http://www.touchplate.com/index.shtml

I'm hopping that this company will have a cost effective approach to low voltage control. A lot of these guys want to charge $200 bucks for a plate with two SPST push buttons on it, and all it does is act as part of a replacement for a $2 toggle switch.

If these guys don’t work out I'll likely start building my own low voltage switch panels but yikes there will need to be a bunch of them.

I forgot to mention one of the neat things about the GE relay. The solenoid outside diameter is sized to fit in a standard electric box knock out.

One controller I built had to RR9s on one side of a 1900 box with a 24VAC transformer on the next. I screwed a barrier strip to the back of the box to make all of the low voltage connections. Neat, small, and simple, just like my wife describes me!

I will now return you to your normally scheduled program.

-Dave
 
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