Hi every body,
I want to use my arduino to control a load with 150 Amps. So, I use a solid state relay with external DC supply.
This relay is shown in this website :
http://www.rselectronics.com/Products/Relays_Timers/Solid_State_Relays-Panel_Mount/DC_Control_24-280_VAC_Output_150_Amps.aspx
and I will build like this circuit shown in the figure.
So, Is this circuit will work in perfect case ?? " May you help me !"
relays.pdf (15.1 KB)
Well my first reaction is like, WOW, can you imagine the size of heat sink that will be required to keep the SSR within max temperature rating. SSRs typically drop about 2vac voltage drop and at 150 amps that's 300 watts of heat generated inside the SSR.
Good luck
Lefty
Well, data sheet says 210 W dissipation power at 150 A. Small heater, you will need a good heat-think.
Regarding referenced schematic, you don't need one. Read data sheet, it says 3 V / 15 mA, so you could drive it directly from arduino output pins.
And it looks like there is optocoupler build-in with 4 kV strength, so no threat for microcontroller, only take care of high voltage side.
Wow 150, what are you controlling? Perhaps the entire house at once?? Lol
150 amps at five volts is barely enough to keep you warm.
Can you confirm that what you need to switch is 150A single phase AC mains? If you're switching DC or a lower voltage, then a mosfet-based SSR or a bank of mosfets would be more suitable.
Below is the spec for the relay. Are you wanting to switch AC or DC, and what is the switched voltage?
Solid State Relays - Panel Mount DC Control, 24-280 VAC Output, 150 Amps
DC Control, SCR Output, 150 Amps, Solid State Panel & DIN Rail Mount Relays; Operating Voltage at 47-63Hz is 24-280Vrms; Load Current Range is .15-150Arms; Line Voltage is 240VAC; DC Input Control.
Yes, please let us know your application. There are electromechanical relays that would almost certainly cost less in a SPST configuration and not have the heat dissipation problem. However, your application would be paramount to making the distinction.