I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

[sam_sam_sam]

How I build something like this

I need it to start clamping the voltage at 28 volts
The data sheet shows that max amperage is 2 amps


This is on a coil type horn

[stj]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

i'm lost.
you want to make transient spikes, or kill transient spikes???

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

i'm lost.
you want to make transient spikes, or kill transient spikes???

I want kill transient spikes how would I go about doing this

I not going to hook it to a PLC but I want to follow there recommendations that they have about transient spikes because I want to use a switching power I also have to power a LED strobe unit which has the same requirements about transient spikes

I do not want to fry the switching power supply

Thanks

[stj]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

VDR's
operate like a zener diode and look like a disc capacitor.

[budm]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

So what is required suppression limit? I will have to be higher than 24V of the source is 24V. So what is the maximum transient is allowed?

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

So what is required suppression limit? I will have to be higher than 24V of the source is 24V. So what is the maximum transient is allowed?

That the part of what I do not know ----> i was thinking of starting to clamp it around 28 volts or so but I do not know if this is right place to start

[budm]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

So are you trying to drive the 24VDC coil type horn (https://www.galco.com/buy/Edwards-Signaling/877-G1) directly or you are trying to drive a switching power supply that requires 24VDC feeding it?

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

So are you trying to drive the 24VDC coil type horn (https://www.galco.com/buy/Edwards-Signaling/877-G1) directly or you are trying to drive a switching power supply that requires 24VDC feeding it?

It will be going through a ( 120 or 24 ) volt timer cube on it's aux contacts
But the horn will be powered by the 24 volt switching power supply along with the 24 volt LED strobe light which will not be on a timer

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

So are you trying to drive the 24VDC coil type horn (https://www.galco.com/buy/Edwards-Signaling/877-G1) directly or you are trying to drive a switching power supply that requires 24VDC feeding it?

The horn will controlled by ( 120 or 24 ) volt timer cube with its aux contacts
The strobe will be controlled by the controller main contactor aux contacts of the unit that going on

and both of them being powered by the 24 volt switching power supply

I could do it the way you hook up relays to micro controllers up where you put a diode across the coil but I am not sure if this will take care of all transit voltage or not and I do not want to fry the strobe light or the switching power supply

This why I am asking these questions

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

VDR's
operate like a zener diode and look like a disc capacitor.

I tried to google VDR ‘s and find what you are talking about

[stj]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

try MOV's

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

try MOV's

Would this work

https://www.digikey.com/product-deta...30K-ND/2798241

And this

https://www.digikey.com/product-deta...DICT-ND/190671

Thanks

[redwire]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

I would use a large TVS diode, 5000W peak-rated like 5KP24A
They don't conduct until 26.7V and deal with the -ve voltage spikes.

The smaller 3000W rated parts are OK but I did not see stock at Digikey.

These buzzers also make a lot of EMI from their contacts arcing, so the wiring to it will radiate EMI. So I would add a 0.22uF cap across the input too.

That would look like a TVS+cap across the buzzer's input connections.
If you want to be sneaky, solder them inside.

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

That would look like a TVS+cap across the buzzer's input connections.
If you want to be sneaky, solder them inside.

I love it when a plan comes together
That is how I am going to do this it has a terminal block where the wires goes

Thanks for the info

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

I want to thank everyone who helped with this problem that I need to resolve

[CapLeaker]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

I would use a large TVS diode, 5000W peak-rated like 5KP24A
They don't conduct until 26.7V and deal with the -ve voltage spikes.

The smaller 3000W rated parts are OK but I did not see stock at Digikey.

These buzzers also make a lot of EMI from their contacts arcing, so the wiring to it will radiate EMI. So I would add a 0.22uF cap across the input too.

That would look like a TVS+cap across the buzzer's input connections.
If you want to be sneaky, solder them inside.

This get's my vote. The MOV's are a little too "crude" compared to a TVS Diode. The TVS diode will measure open in both directions when good.

[budm]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

The 5KP24A is UNIDIRECTIONAL so polarity must be observed.
The BIDIRECTIONAL will show open circuit in both direction.

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

What would the part number be for this

The BIDIRECTIONAL will show open circuit in both direction.

Is this what I am looking for

https://www.digikey.com/product-deta...0CT-ND/6174240

[CapLeaker]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

That one is ending with CA, so it is bidirectional.

[sam_sam_sam]

Re: I need to build a transient voltage spikes 28 to 30 volts @ 2 amps

Is this cap going to work

https://www.digikey.com/scripts/DkSe...87845804219290