Heatbox temp and duration?

[Kirkll]

Your theory is good, but I'm uncertain how the power supply will react with a closed circuit for long periods of time. There are most likely ground fault saftey switches , breakers,  or fuses built into these power supplies with digital readouts that shut things down before they  generate enough heat.

The newer battery chargers have safety switches built into them, and kick off automatically way before the heat strips warmed up.

But I suppose there is only one way to find out. Buy one and see if it works. If not, send it back.

[mmattockx]

Your theory is good, but I'm uncertain how the power supply will react with a closed circuit for long periods of time.

They are designed for that sort of service. I have a battery charger I use for my radio controlled aircraft batteries. It has a mode specifically for powering a hot wire, for cutting foam. It will run that mode non-stop forever as long as you don't exceed its power ratings and overheat it. The power supplies should be the same thing.

Doing some more reading, it appears they act as I say above.

https://www.tek.com/en/blog/dc-bench-power-supply-fundamentals

https://www.ni.com/en/shop/electronic-test-instrumentation/power-supplies-and-loads/what-are-programmable-power-supplies/remote-sense-ripple-noise.html?srsltid=AfmBOoo8NVjFXfYXgoFkklEwTkN2jRY1c1OXiwx5fFZQIZDgoWOEZGYJ

They will power a load indefinitely as long as you stay within their power rating limits. Since they are DC output a resistive load is no issue.

But I suppose there is only one way to find out. Buy one and see if it works. If not, send it back.

Most likely this is the answer.


Mark

[Kirkll]

This unit puts out 60 volts, 300 watts DC....
"https://www.amazon.com/Adjustments-Adjustable-Switching-Regulated-Quick-Charge/dp/B0D93S1Y7T/ref=sr_1_1_sspa?crid=1ZC8L0BISTNYH&dib=eyJ2IjoiMSJ9.r4MhqVAO4lyiREM4IKlg3l4UuiZojLBN_VSKEcL7-Tafb54mqVn9yrHooRmrHAYXn5rDRjNXtbFT9xdwvJzk155U2nVtdgfw2er5_S-XQXL5Zj36w-uQREbgj_hrR0_n_DlyGbkZUCzSk84VE9bf0NsvhQnVZJdi__noMg3PoU__0pcBCmRzfyRDWTDYZZ3O7_sNTdz6KnqkD5KUJr7LAuMtpg-okKK4Fs3ANKksxas.4qgVYpkS12Bq9F692HHU2yC5HSQ7lSru7pD0N-2ZcfM&dib_tag=se&keywords=60%2Bvolt%2BDC%2Bpower%2Bsupply&qid=1762792782&sprefix=60%2Bvolt%2Bdc%2Bpower%2Bsupply%2Caps%2C254&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1

But this is what concerns me.

"Short circuit alarm: In order to improve the safety of lab power supply and prolong its service life, we designed a short circuit alarm device for DC power supply. After the OCP function is turned on, if the load equipment is short-circuited in the working process, the variable power supply will automatically stop outputting and send a buzzer to remind the user, protecting the adjustable power supply and the load from being damaged. Bench power supply also has safety protection functions such as overvoltage, overcurrent, overtemperature and overload."

Isn't hooking up the positive and negative leads together with the heat strip between the leads a short circuit? Even if it doesn't turn off, keeping a constant voltage to reach temps needed for the heat strips may kick the unit off too with the other built in saftey features.