• The operation of flow pumps

  • Deborah2682

Congratulations, esteemed community. I hope for the assistance of aquarists-electrical engineers. Please clarify the following points: 1) Can a DC pump rated for 24V operate at lower voltages, say 20V or 12V (from non-native power supplies, of course)? The question is whether it is possible to reduce the flow pump's power in this way. In this case, we are talking about the Jebao WP25. 2) I have a controller that can operate the pump in a mode of "on for a few seconds, off for a few seconds." Will such frequent on-off cycles harm the pump motor? In this case, I am interested in the AC pump HYDOR KORALIA NANO. Thank you!

Ronald5720

Regarding the second point... Hudor has its own original controller for the Coral Nano. So using a third-party one is not a problem.

Amanda5586

As for the controller for the Coralia, I'm aware of it, I just don't know if the operating principle of this original controller from Hidor matches that of my controller, which is why I'm asking knowledgeable people.

Kevin262

What principle does your controller have? Coralie Nano is 220V AC. It only allows on/off by breaking the power circuit.

Brent8919

As far as I understand, the power circuit is interrupted there using a relay. Thank you, it seems that I will be able to connect the corallium to my controller. And additionally, did I understand correctly that DC pumps cannot be controlled in this way, only with alternating current?

Courtney4094

The relay does not care which current circuit to break. However, with such a controller (breaking the current circuit using a relay), you will not be able to control the power of the DC pump (flow strength). Only on/off.

Randy

We have figured out point 2. What about point 1??? Is it safe for DC pumps to operate at a lower voltage than specified??? I want to decide whether to buy a new power supply for my Jebao WP25 or to get a new, less powerful Coral pump?? There's also the option of finding a new Jebao WP10 head compatible with my controller...

Chad9037

You can run a DC pump at a lower voltage - it will spin at a lower speed and, naturally, the flow will be less. Some controllers have a speed adjustment function based on the principle of reducing voltage. By the way, it's not necessary to buy a new power supply for a different voltage - you can simply add a regulator to the existing power supply and use it to adjust the desired speed of the DC pump.

Daniel

Thank you for your response! So, if my Jebao VP25 pump operates at 24V, do I understand correctly that in 50% power mode, only 12V is supplied to it from the controller? And if I want to reduce its output by half, do I need to supply only 5-6V? Could you please provide more detailed information about the regulator - what it is, how to connect it, and so on? At least some links to what is needed, please!

Barbara

Not quite, the dependence here is almost quadratic (due to design features) - if the voltage is reduced by half, the performance drops by 3-4 times. This needs to be assessed on-site. That's why I mentioned the speed controller. The controller is built on the LM317 chip and allows for seamless operation with a voltage of 30 Volts and a current of 1 Ampere. With such a controller, you can get an output of 12 Volts or even less when powered by a 24 Volt power supply. It can also be used for cooling fans in aquariums to reduce noise. If necessary, I can assemble and send it.

Tracy4603

Hello! The HYDOR KORALIA NANO pump, like all other modern pumps produced by Hydor, supports operation with frequent starts. Therefore, both the proprietary Srwave controller and any other timer controller can work with them.

Kevin3579

Over the weekend, I connected Oleg's device to the Jebao WP25 pump. The flight is normal. In the pump mode "Else" (which does not support power reduction by the pump's standard means), I set the voltage to 18 volts on the controller, and the water flow became quieter. The inhabitants are not being thrown around the corners of the aquarium. Thank you for the help in "taming" the WP25!