DrkAngel
1 GW
MeanWell Mods
MeanWell Mods - S-150-5
MeanWell Mods - S-150-12
MeanWell Mods - S-150-24
MeanWell Mods - S-150-48
MeanWell Mods - S-240-48
MeanWell Mods - S-350-48
See- ES Wiki MeanWell Mods for more
MeanWell S-350-48
Specs:
Mean Well S-350-48
350w max continuous output
48V - adjustable from 41V - 56V
7.3A max continuous output@48V -
48V x 7.3A = 350W
Thermal regulated fan
Factory Specs
Problem:
Rated at 7.3A, but will surge-sustain much higher, burning components
Solution:
Restrict the amp output -
The "R33" resister is the key to regulating amperage.
For testing purposes, I soldered 2 wires of a 2s balance plug to the ends of the R33 resister.
Then plugged a multi-turn 2K Pot (potentiometer) into the balance connector.
Then I lowered the voltage to minimum and applied "load".
Removing and measuring the pot's ohms at each 1/2 amp mark.
(Pot must be removed to measure! "In circuit" it is laid parallel with R33.)
Restricting Current (Amps):
9.1A = (OEM resister only) .350K = 350ohm
7.9A = 2.000K = 2000 ohm
7.5A = 1.432K = 1432 ohm
7.3A = 1.200K = 1200 ohm
7.0A = 1.000K = 1000 ohm
6.5A = .775K = 775 ohm
6.0A = .580K = 580 ohm
5.5A = .458K = 458 ohm
5.0A = .368K = 368 ohm
4.5A = .288K = 288 ohm
4.0A = .225K = 225 ohm
3.5A = .180K = 180 ohm
3.0A = .132K = 132 ohm
2.5A = .098K = 98 ohm
2.0A = .065K = 65 ohm
1.5A = .038K = 38 ohm
1.0A = .013K = 13 ohm
Wider Amp adjustment:
Disconnect, or remove R33.
Replace with adjustable "pot"
Amps ........ Ohms
1A ... from ... ? ohms
2A ... from ... ? ohms
3A ... from ... ? ohms
4A ... from ... ? ohms
5A ... from ... ? ohms
6A ... from ... ? ohms
7A ... from ... ? ohms
8A ... from ... ? ohms
9.1A ... from ... 350 ohms
10A .. from .. ? ohms
11A .. from .. ? ohms
12A .. from .. ? ohms
13A .. from .. ? ohms
14A .. from .. ? ohms
15A .. from .. ? ohms
16A .. from .. ? ohms
17A .. from .. ? ohms
18A .. from .. ? ohms
19A .. from .. ? ohms
20A .. from .. ? ohms
etc.
Need lower voltage high drain rig to determine higher amps.
Not precise ... used analog amp meter.
Widening the voltage range:
By changing the value of the Voltage pot, I was able to lower the output range substantially.
1K = 38.3 - 56.7V (oem)
2K = 29.8 - 56.7V
5K = ? - 56.7V (<20V - 56.7V estimated)
10K = ? - 56.7V
20K = ? - 56.7V
100K = ? - 56.7V
As I will demonstrate later, there can be great advantages to lower voltages.
Note! The higher value pots (100K etc) only allow a very "coarse" adjustment at the high voltage end. Harder to fine adjust.
Lowering Voltage
Lowering voltage could take advantage of higher amperage.
Without removing components, amperage is regulated below 9.1Amps.
R33 has a measured resistance of ~350ohms.
Component View
Raising Voltage?
Not tested ... or recommended!
This model has 63V caps ... a fairly strict limitation!
350 Watt!
To be safe and effective, amperage should be adjusted as voltage is altered.
Volts x Amps = Watts
Watts should equal, or be slightly below, 350 watts.
56V x 6.25A = 350w
55V x 6.36A = 350w
54V x 6.48A = 350w
53V x 6.60A = 350w
52V x 6.73A = 350w
51V x 6.86A = 350w
50V x 7.00A = 350w
49V x 7.14A = 350w
48V x 7.30A = 350W
47V x 7.44A = 350w
46V x 7.60A = 350w
45V x 7.77A = 350w
44V x 7.95A = 350w
43V x 8.13A = 350w
42V x 8.33A = 350w
41V x 8.53A = 350w
40V x 8.75A = 350w
39V x 8.97A = 350w
38V x 9.21A = 350w
37V x 9.45A = 350w
36V x 9.72A = 350w
35V x 10.00A = 350w
34V x 10.29A = 350w
33V x 10.60A = 350w
32V x 10.93A = 350w
31V x 11.29A = 350w
30V x 11.66A = 350w
29V x 12.06A = 350w
28V x 12.5A = 350w
27V x 12.96A = 350w
26V x 13.46A = 350w
25V x 14.00A = 350w
24V x 14.58A = 350w
23V x 15.21A = 350w
20V x 17.50A = 350w
15V x 23.33A = 350w
10V x 35.00A = 350w
5V x 70.00A = 350w
Yeah ... I'm gonna try pushing everything to the limits ... and then a little further!
(Will test to confirm)
In Series
"In series" is when the negative of one power supply is run through the positive of another - combining their voltages.
Important!
When run in "series" the DC "negative" must be isolated from the 110AC negative ... on all but the primary unit!. Otherwise, the DC positive from the primary unit will "short" through the AC negative on the secondary unit.
The negatives are usually connected through the "ground".
Not confirmed yet!!!
It appears the S-350 series is ready for "in series" with no mods!
Not confirmed yet!!!
Submitted to Endless Sphere WIKI
MeanWell Mods - S-150-24 Mods w\Instructions
MeanWell Mods
S-150-5
S-150-12
S-150-24
S-150-48
S-240-48
S-350-48
MeanWell Mods - S-150-5
MeanWell Mods - S-150-12
MeanWell Mods - S-150-24
MeanWell Mods - S-150-48
MeanWell Mods - S-240-48
MeanWell Mods - S-350-48
See- ES Wiki MeanWell Mods for more
MeanWell S-350-48
![S-350-48.JPG S-350-48.JPG](https://endless-sphere.com/sphere/data/attachments/129/129802-03c1f1e510462b9b125eab75e46e51d6.jpg)
Specs:
Mean Well S-350-48
350w max continuous output
48V - adjustable from 41V - 56V
7.3A max continuous output@48V -
48V x 7.3A = 350W
Thermal regulated fan
Factory Specs
Problem:
Rated at 7.3A, but will surge-sustain much higher, burning components
Solution:
Restrict the amp output -
The "R33" resister is the key to regulating amperage.
![S-350-48_2.jpg](https://endless-sphere.com/w/images/4/41/S-350-48_2.jpg)
For testing purposes, I soldered 2 wires of a 2s balance plug to the ends of the R33 resister.
Then plugged a multi-turn 2K Pot (potentiometer) into the balance connector.
Then I lowered the voltage to minimum and applied "load".
Removing and measuring the pot's ohms at each 1/2 amp mark.
(Pot must be removed to measure! "In circuit" it is laid parallel with R33.)
Restricting Current (Amps):
9.1A = (OEM resister only) .350K = 350ohm
7.9A = 2.000K = 2000 ohm
7.5A = 1.432K = 1432 ohm
7.3A = 1.200K = 1200 ohm
7.0A = 1.000K = 1000 ohm
6.5A = .775K = 775 ohm
6.0A = .580K = 580 ohm
5.5A = .458K = 458 ohm
5.0A = .368K = 368 ohm
4.5A = .288K = 288 ohm
4.0A = .225K = 225 ohm
3.5A = .180K = 180 ohm
3.0A = .132K = 132 ohm
2.5A = .098K = 98 ohm
2.0A = .065K = 65 ohm
1.5A = .038K = 38 ohm
1.0A = .013K = 13 ohm
Wider Amp adjustment:
Disconnect, or remove R33.
Replace with adjustable "pot"
Amps ........ Ohms
1A ... from ... ? ohms
2A ... from ... ? ohms
3A ... from ... ? ohms
4A ... from ... ? ohms
5A ... from ... ? ohms
6A ... from ... ? ohms
7A ... from ... ? ohms
8A ... from ... ? ohms
9.1A ... from ... 350 ohms
10A .. from .. ? ohms
11A .. from .. ? ohms
12A .. from .. ? ohms
13A .. from .. ? ohms
14A .. from .. ? ohms
15A .. from .. ? ohms
16A .. from .. ? ohms
17A .. from .. ? ohms
18A .. from .. ? ohms
19A .. from .. ? ohms
20A .. from .. ? ohms
etc.
Need lower voltage high drain rig to determine higher amps.
Not precise ... used analog amp meter.
Widening the voltage range:
By changing the value of the Voltage pot, I was able to lower the output range substantially.
1K = 38.3 - 56.7V (oem)
2K = 29.8 - 56.7V
5K = ? - 56.7V (<20V - 56.7V estimated)
10K = ? - 56.7V
20K = ? - 56.7V
100K = ? - 56.7V
As I will demonstrate later, there can be great advantages to lower voltages.
Note! The higher value pots (100K etc) only allow a very "coarse" adjustment at the high voltage end. Harder to fine adjust.
Lowering Voltage
Lowering voltage could take advantage of higher amperage.
Without removing components, amperage is regulated below 9.1Amps.
R33 has a measured resistance of ~350ohms.
Component View
Raising Voltage?
Not tested ... or recommended!
This model has 63V caps ... a fairly strict limitation!
350 Watt!
To be safe and effective, amperage should be adjusted as voltage is altered.
Volts x Amps = Watts
Watts should equal, or be slightly below, 350 watts.
56V x 6.25A = 350w
55V x 6.36A = 350w
54V x 6.48A = 350w
53V x 6.60A = 350w
52V x 6.73A = 350w
51V x 6.86A = 350w
50V x 7.00A = 350w
49V x 7.14A = 350w
48V x 7.30A = 350W
47V x 7.44A = 350w
46V x 7.60A = 350w
45V x 7.77A = 350w
44V x 7.95A = 350w
43V x 8.13A = 350w
42V x 8.33A = 350w
41V x 8.53A = 350w
40V x 8.75A = 350w
39V x 8.97A = 350w
38V x 9.21A = 350w
37V x 9.45A = 350w
36V x 9.72A = 350w
35V x 10.00A = 350w
34V x 10.29A = 350w
33V x 10.60A = 350w
32V x 10.93A = 350w
31V x 11.29A = 350w
30V x 11.66A = 350w
29V x 12.06A = 350w
28V x 12.5A = 350w
27V x 12.96A = 350w
26V x 13.46A = 350w
25V x 14.00A = 350w
24V x 14.58A = 350w
23V x 15.21A = 350w
20V x 17.50A = 350w
15V x 23.33A = 350w
10V x 35.00A = 350w
5V x 70.00A = 350w
Yeah ... I'm gonna try pushing everything to the limits ... and then a little further!
(Will test to confirm)
In Series
"In series" is when the negative of one power supply is run through the positive of another - combining their voltages.
Important!
When run in "series" the DC "negative" must be isolated from the 110AC negative ... on all but the primary unit!. Otherwise, the DC positive from the primary unit will "short" through the AC negative on the secondary unit.
The negatives are usually connected through the "ground".
Not confirmed yet!!!
It appears the S-350 series is ready for "in series" with no mods!
Not confirmed yet!!!
Submitted to Endless Sphere WIKI
MeanWell Mods - S-150-24 Mods w\Instructions
MeanWell Mods
S-150-5
S-150-12
S-150-24
S-150-48
S-240-48
S-350-48