Hi, About HP power supply part number: 226519-001. It als has spare part # 253232-001. I need the diagram of its DC connector. Do you know who is the orginal power supply manufacturer? Kind regards, Valery Bliss

More info for you, it is made by ASTEC SEMICONDUCTOR, MODEL HPS3KW.

Here is the spec sheet: http://www.datasheetarchive.com/HPS3KW-d... with pin out. More info for you, it is made by ASTEC SEMICONDUCTOR, MODEL HPS3KW.
Here is the spec sheet: http://www.datasheetarchive.com/HPS3KW-datasheet.html with pin out.

Hi,

Thank you very much for the information. Indeed 253232-001 is exactly the same as ASTEC HPS3KW. I have it working stand alone and it produces 51.35V. It maintains same voltage even at max current 57A. This is too high voltage for me. I need 48V or bellow. I opened it and found a potentiometer (about 5mm square) and using it I was able to reduce the voltage to 50.55V. It is still high for me. I thought the power supply will have V sense, so that I can trick it, however when reading the specification I can not find such signal. Indeed there is a 48LS signal, but I do not know what it does.
Do you have any idea how to reduce the voltage?

How the power supply can be converted to Constant Current?

Kind regards,
Valery Hi, Thank you very much for the information. Indeed 253232-001 is exactly the same as ASTEC HPS3KW. I have it working stand alone and it produces 51.35V. It maintains same voltage even at max current 57A. This is too high voltage for me. I need 48V or bellow. I opened it and found a potentiometer (about 5mm square) and using it I was able to reduce the voltage to 50.55V. It is still high for me. I thought the power supply will have V sense, so that I can trick it, however when reading the specification I can not find such signal. Indeed there is a 48LS signal, but I do not know what it does. Do you have any idea how to reduce the voltage? How the power supply can be converted to Constant Current? Kind regards, Valery

You can build constant current source which fed by the regulated power supply, in this case, the HPS3KW. Just Google 'Constant current source circuits' design'. How much current are you looking for?
You can build simple one using regulator IC. http://www.discovercircuits.com/C/consta... You can build constant current source which fed by the regulated power supply, in this case, the HPS3KW. Just Google 'Constant current source circuits' design'. How much current are you looking for? You can build simple one using regulator IC. http://www.discovercircuits.com/C/constant.htm

Hi,

Thank you for the information.
I need DC constant current power supply for about 60A . Nominal voltage 42-50V. The quality of the stabilization is not important. I use it for HHO/Brown Gas. Total power of the power supply 3-4KW. I bought 253232-001 new from e-bay in Australia just for $46.
There is a better power supplier from Cisco WS-CAC-6000W. I have the pin out from EMERSON. These power supplies are great however at lot higher price. It is available only form US are higher transport cost.
There is a 3KW power supply HCP3000PS48 that allow constant voltage or current configuration. I can not find this power supply for sale. I have its specification and pin out.

Any ideas?

Kind regards, Hi, Thank you for the information. I need DC constant current power supply for about 60A . Nominal voltage 42-50V. The quality of the stabilization is not important. I use it for HHO/Brown Gas. Total power of the power supply 3-4KW. I bought 253232-001 new from e-bay in Australia just for $46. There is a better power supplier from Cisco WS-CAC-6000W. I have the pin out from EMERSON. These power supplies are great however at lot higher price. It is available only form US are higher transport cost. There is a 3KW power supply HCP3000PS48 that allow constant voltage or current configuration. I can not find this power supply for sale. I have its specification and pin out. Any ideas? Kind regards,

Hi,

Even Cisco WS-CAC-4000W has good current, but do not know if I can adjust it.

Regards,
Valery Hi, Even Cisco WS-CAC-4000W has good current, but do not know if I can adjust it. Regards, Valery

I look up the HCP3000PS48, the programmed current out is for maximum it will allow to put out, it is regulated output voltage power supply for up to current limit setting.
What is the HHO/Brown Gas and why does it need constant current feeding it, constant current power supply will vary it output voltage to get the desired regulated current to flow through the load. Is this load variabled? I look up the HCP3000PS48, the programmed current out is for maximum it will allow to put out, it is regulated output voltage power supply for up to current limit setting. What is the HHO/Brown Gas and why does it need constant current feeding it, constant current power supply will vary it output voltage to get the desired regulated current to flow through the load. Is this load variabled?

OK, I look up the HHO/Brown gas, you are trying to Oxyhydrogen - Fuel from Water? http://brownsgas.com/
The 60A current needed at 48vdc or so means that the load is about 0.8 Ohm. So if the maximum output voltage from constant power supply source is 48vdc, it means that it will not be able to maintain 60A through the load if the load resistance goes higher than 0.8 Ohm.
May be you can explain the setup of this HHO/BROWN GAS functions so I will understand the requirement of the power supply and what type it has to be.
The regulated power supply can supply contant voltage of 48v to the load with maximum current of 50 (60)A. OK, I look up the HHO/Brown gas, you are trying to Oxyhydrogen - Fuel from Water? http://brownsgas.com/ The 60A current needed at 48vdc or so means that the load is about 0.8 Ohm. So if the maximum output voltage from constant power supply source is 48vdc, it means that it will not be able to maintain 60A through the load if the load resistance goes higher than 0.8 Ohm. May be you can explain the setup of this HHO/BROWN GAS functions so I will understand the requirement of the power supply and what type it has to be. The regulated power supply can supply contant voltage of 48v to the load with maximum current of 50 (60)A.

Hi,
HHO is produced with electrolytic cell with high concentration of Sodium Hydroxide NaOH. Usually 25%wt. When is cool the resistance is low and the current is low. Therefore HHO gas production is low. At this time in order to maintain constant gas production we have to increase the current, so the voltage is to increase. When the cell is hot - about 70-80degrees C, the cell resistance is low therefore start to consume too much current, therefore we need to reduce the voltage on the cell.
For example see this:http://cgi.ebay.com/ebaymotors/HHO-2-4-L...

My generator is rather large compared to those on e-bay. I have sized it for 48V, but unfortunately the 48V power supply 253232-001 give me 51.35V which is a lot more than what I require. It appears that my HHO generator at 80 degrees would use about 4KW. I did not expect to go to that high temperature, but at this temperature the best gas is coming.

Kind regards,
Valery Hi, HHO is produced with electrolytic cell with high concentration of Sodium Hydroxide NaOH. Usually 25%wt. When is cool the resistance is low and the current is low. Therefore HHO gas production is low. At this time in order to maintain constant gas production we have to increase the current, so the voltage is to increase. When the cell is hot - about 70-80degrees C, the cell resistance is low therefore start to consume too much current, therefore we need to reduce the voltage on the cell. For example see this: http://cgi.ebay.com/ebaymotors/HHO-2-4-LPM-26Plates-316L-6X6-Dry-Cell-Generator-_W0QQcmdZViewItemQQhashZitem2a0aa662a1QQitemZ180567302817QQptZMotorsQ5fAutomotiveQ5fTools#ht_664wt_935 My generator is rather large compared to those on e-bay. I have sized it for 48V, but unfortunately the 48V power supply 253232-001 give me 51.35V which is a lot more than what I require. It appears that my HHO generator at 80 degrees would use about 4KW. I did not expect to go to that high temperature, but at this temperature the best gas is coming. Kind regards, Valery

HHO generator is very sensitive to voltage above 2V per cell. The function is exponential. HHO generator is very sensitive to voltage above 2V per cell. The function is exponential.

The current rises very fast that is why constant current power supply would perform better. The current rises very fast that is why constant current power supply would perform better.

If there is a regulated power supply, constant current. I need the power supply to be adjusted to give 50A. To maintain this current the power supply voltage will range from 48V (when the cell is cold) to 42V when the cell is hot (80 degrees). If there is a regulated power supply, constant current. I need the power supply to be adjusted to give 50A. To maintain this current the power supply voltage will range from 48V (when the cell is cold) to 42V when the cell is hot (80 degrees).

Ok, thanks for the explanation, I will have to study up on it more, it sounds like some kind of fuel cells?
So when it is cold the resistance is HIGH os less current will flow through the liquid, but to get constant gas out put, the voltage is increased which at the same time the cell will get hotter and its resistance goes down causes more current to flow if the voltage source is kept contant, so the the voltage has to go down. I see why you will need contant current feeding this thing, and worst case it can draw as much as 60A? But since the cell cannot be exposed to above 2v at the same time, this can be very complicate regulation of both voltage and current.
How do other people do it? This is very interesting! Ok, thanks for the explanation, I will have to study up on it more, it sounds like some kind of fuel cells? So when it is cold the resistance is HIGH os less current will flow through the liquid, but to get constant gas out put, the voltage is increased which at the same time the cell will get hotter and its resistance goes down causes more current to flow if the voltage source is kept contant, so the the voltage has to go down. I see why you will need contant current feeding this thing, and worst case it can draw as much as 60A? But since the cell cannot be exposed to above 2v at the same time, this can be very complicate regulation of both voltage and current. How do other people do it? This is very interesting!

People manufacture current controllers for HHO, however they are only for 12V.
In addition they do not work correctly.
The trick is that the efficiency of the cell (Liter of gas produced for Watt of energy) depends strongly on the applied voltage. When the voltage is high the cell produces too much heat and little good gas.
Those off the shelf current controllers do not regulate the voltage on the cell to reduce the voltage, but they change the duty cycle of the full voltage pulses sent to the cell. This is no good. I already build several of those with a 800A Pulse MOS transistor. I do not use it now because it is not a good method to control the cell.
The voltage must be reduced when the cell gets hot. You would be surprise how millivolts change in the power supply voltage changes the current in Amps. People manufacture current controllers for HHO, however they are only for 12V. In addition they do not work correctly. The trick is that the efficiency of the cell (Liter of gas produced for Watt of energy) depends strongly on the applied voltage. When the voltage is high the cell produces too much heat and little good gas. Those off the shelf current controllers do not regulate the voltage on the cell to reduce the voltage, but they change the duty cycle of the full voltage pulses sent to the cell. This is no good. I already build several of those with a 800A Pulse MOS transistor. I do not use it now because it is not a good method to control the cell. The voltage must be reduced when the cell gets hot. You would be surprise how millivolts change in the power supply voltage changes the current in Amps.

That is very sensitive, I wonder how they will make power supply with the output voltage and current you need with very low ripple voltage in millivolts range (<10 millivolts?) that will be small enough not to affect the cell, you will need power supply with KELVIN connection to really get good regulation since voltage drops on the power lead will be important also. I really do not have much suggestion at this point but please keep post on your result of the solution you may have found, thanks. That is very sensitive, I wonder how they will make power supply with the output voltage and current you need with very low ripple voltage in millivolts range (<10 millivolts?) that will be small enough not to affect the cell, you will need power supply with KELVIN connection to really get good regulation since voltage drops on the power lead will be important also. I really do not have much suggestion at this point but please keep post on your result of the solution you may have found, thanks.

Short ripples are not a problem. E.g 253232-001/HPS3KW is actually too good for the purpose from ripples point of view.

HPS3KW has a 48LS signal on pin 1-A.
I am wondering If I could use this signal to force the power supply to limit the current, in effect forcing it to reduce voltage.

I can not find a reference how to control the signal on 48LS externally.
I found this document, but can not figure it out.http://focus.ti.com/lit/ug/sluu166a/sluu... Short ripples are not a problem. E.g 253232-001/HPS3KW is actually too good for the purpose from ripples point of view. HPS3KW has a 48LS signal on pin 1-A. I am wondering If I could use this signal to force the power supply to limit the current, in effect forcing it to reduce voltage. I can not find a reference how to control the signal on 48LS externally. I found this document, but can not figure it out. http://focus.ti.com/lit/ug/sluu166a/sluu166a.pdf

Well, now that I know what you're trying to do...as far as I know, these power supplies are rated at 48V 5% meaning you can adjust up but not down.
You need to drop a specific number of volts without getting fluctuations so I suggest simply tacking a few high wattage diodes to the output.
For instance, if you wanted to drop ~ 2.4V - 2.8V, add 4 diodes rated at at least 48V 3000W. You will find diodes like this are usually classified as TV diodes or TVS.
They're cheap, so give yourself some room and go a fair bit over voltage and over current if you can to avoid thermal breakdown. Well, now that I know what you're trying to do...as far as I know, these power supplies are rated at 48V 5% meaning you can adjust up but not down. You need to drop a specific number of volts without getting fluctuations so I suggest simply tacking a few high wattage diodes to the output. For instance, if you wanted to drop ~ 2.4V - 2.8V, add 4 diodes rated at at least 48V 3000W. You will find diodes like this are usually classified as TV diodes or TVS. They're cheap, so give yourself some room and go a fair bit over voltage and over current if you can to avoid thermal breakdown.