Hello, really sorry as didn't find an electrical only section to post this kind of projects, so I've chose this section for general interests and sharing ideas.
Long time ago I've turned an old UPS into an 6x 12v triggered AC power-outlets, however it was made out of an ~30A contactor with 24AC coil and had to build the trigger circuit, while this unit is still working ok, the only random issues are that AC relays/contactors may drop under high inrush currents and with small AC variations, not to mention that I had to mount the unit with a foam pad since sometimes gets noisy.
This time I've search my old parts bin and wanted to make a simpler more elegant unit with no extra power supply/transformers, and based on SSR's with dual independently controlled AC outlets for totaling 8x outlets.
So I've build an 3~32VDC trigger dual bank unit for my audio system.
Some specs/parts:
Case: Old APC BE500R
AC Plug: Hubbell Industrial.
Main Cable: 3/10AWG type SOW.
Breaker: Small 25A push to reset.
SSR's: 2x 125VAC 25A, 3~32VDC control.
MOV's: 150V clamp mains(241KD20), 130V clamp for extra SSR protection(201KD20).
Heatsink: Random AMD CPU cooler.
Relay: 8Pin 120VAC DPDT(optional).
TH Sensor: Elmwood 2450 F131(55c)(optional).
Input jacks: 2x 5.5mm x 2.5mm
Additionally the SSR's main rail cable is 10AWG and each AC outlets bank was wired with 14AWG, also I've decided to eliminate the time-delay module since most AVR's and new audio gear has its own turn-on delays and soft-start circuits.
Also since the SSR compartment is closed, I've used the 8Pin DPDT relay as an SSR overheat protection circuit in combination with an normally-open thermal sensor, so the relay will remain off until the the heatsink past about 55c effectively disabling the SSR's, between overheat is most likely uncommon with the dynamic power consumption nature of the audio gear but extra protection is always welcome.
Build images:
Long time ago I've turned an old UPS into an 6x 12v triggered AC power-outlets, however it was made out of an ~30A contactor with 24AC coil and had to build the trigger circuit, while this unit is still working ok, the only random issues are that AC relays/contactors may drop under high inrush currents and with small AC variations, not to mention that I had to mount the unit with a foam pad since sometimes gets noisy.
This time I've search my old parts bin and wanted to make a simpler more elegant unit with no extra power supply/transformers, and based on SSR's with dual independently controlled AC outlets for totaling 8x outlets.
So I've build an 3~32VDC trigger dual bank unit for my audio system.
Some specs/parts:
Case: Old APC BE500R
AC Plug: Hubbell Industrial.
Main Cable: 3/10AWG type SOW.
Breaker: Small 25A push to reset.
SSR's: 2x 125VAC 25A, 3~32VDC control.
MOV's: 150V clamp mains(241KD20), 130V clamp for extra SSR protection(201KD20).
Heatsink: Random AMD CPU cooler.
Relay: 8Pin 120VAC DPDT(optional).
TH Sensor: Elmwood 2450 F131(55c)(optional).
Input jacks: 2x 5.5mm x 2.5mm
Additionally the SSR's main rail cable is 10AWG and each AC outlets bank was wired with 14AWG, also I've decided to eliminate the time-delay module since most AVR's and new audio gear has its own turn-on delays and soft-start circuits.
Also since the SSR compartment is closed, I've used the 8Pin DPDT relay as an SSR overheat protection circuit in combination with an normally-open thermal sensor, so the relay will remain off until the the heatsink past about 55c effectively disabling the SSR's, between overheat is most likely uncommon with the dynamic power consumption nature of the audio gear but extra protection is always welcome.
Build images:
Final unit images:
Unit back view showing the 12v trigger inputs and the push to reset breaker, the small screw above the triggers input is for external device grounding.
Unit back view showing the 12v trigger inputs and the push to reset breaker, the small screw above the triggers input is for external device grounding.