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Old 05-19-2018, 07:12 PM
*rayman*'s Avatar
*rayman* *rayman* is offline
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Default PWM Controllers or Relays and circuit breakers

I've been looking for a more robust solution for my thermo fans wiring.

I currently have 2 x OEM ford fans in a shroud mounted up to a large alloy Desert cooler radiator. This radiator is cross flow, and quite a thick core. It definitely has the cooling capacity to keep the big block cool enough even through harsh summer in Australia. The fans are quite high CFM, supposedly about 3800. They pull heaps of air when they are working on high speed. They are a 2 speed fan, similar to the Lincoln fans a lot of you U.S guys resort to. The fans are currently wired on a relay each, with an inline fuse on each fan, operated by a manual ON/OFF switch. I've been melting fuses at 30amp, and have temporarily put 40amp fuses in. These fans are running on the high speed mode, and are pulling i believe right on about 30 amps. It would be nice to soft start them, or even utilise the two speed mode they are capable of, and only run them when necessary.

I bought a Derale 16749 fan controller, but have realised the 25amp continuous rating is not going to cut it. I planned to control 1 fan, with the option to switch the second fan on manually if required.

I recently missed out on a SPAL PWM-3 fan controller.

I've looked at the other various PWM fan controllers, but the reviews of some of these controllers really don't inspire me on their quality.

I came across these TRAC breakers, and thought that i might resort to manually operated with these breakers mounted up near the fans to have more idea of whats going on. Anyone used them and have any feedback?

https://www.tracoutdoor.com/shop/ele...it-breakers-3/

https://www.walmart.com/ip/Trac-12-V...eaker/40715420

Anybody used this guys stuff?
http://www.autocoolguy.com/home
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Last edited by *rayman*; 05-19-2018 at 07:33 PM.
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