Hi
I need electronic switching devices that take the following voltages and currents at the input and provide them to DC loads connected at the output. The switches are to be controlled by control signals that come from a controller. So every switch must have three terminals. An input terminal, a control signal terminal ( to turn the switch ON or OFF) and an output terminal.The currents and voltages at the input are as follows:
1. A switching device for 144V, 400A
2. A switching device for 144V, 110A
3. A switching device for 24V, 15A
Can anyone suggest suitable devices? Thanks.

 

Don't know if they come that big, but Google SSR's (AKA solid state relays). Basically a optically coupled triac and LED.

 

Not SCRs or triacs, because this is a DC application.

Try Powerex: http://www.pwrx.com/

They can meet the spec with either IGBTs or MOSFETs.

But this is not going to be an inexpensive project.

 

Anyone messing with this voltage and power should already have a pretty good backgound in power electronics of be an electrician. Is this true here?

 

No sorry I am afraid I have almost no background in power electronics. I am a fresh internee at an organisation and have been assigned the task to find a switching device meeting the above specs. I would be obliged if someone can suggest specific devices( their names and links to their data sheets). Thanks to all of you for your useful feedback.

 

I believe you should seek professional help in this endeavor, as there are many questions that have to be answered in terms of loads, not just voltage and current.
How to control a power handling device is probably as important as the device itself.

Regards, DPW

 

ok thank you very much.