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Alpha 400 Handbook
Adjustment and Derating:
The Alpha 400 series is designed to provide a max output power of 400W at nominal output voltages. The following
procedure must be used to ensure the PSU is operated within its ratings:
a) Calculate user power for each module (volts x amps).
b) Add all the individual module powers together. The total power must not exceed the power rating of the
C
converter 400W.
c) Calculate secondary transformer turns x amps or each module see outputs table for transformer
ssssecondary turns.
d) Add all the module turns x amps together and this must not exceed 80AT.
e) If necessary reduce the loading until the conditions are met. ie. power and ampere-turns maxima.
Output module ratings:
Module
Output Voltage
A
4.5 – 6V
AA
4.5 – 7V
AL
4.75 – 5.3V
BB
4.5 – 7V
B
4.5 – 6V
C, CC
5 – 16V
4.6 – 5.6V
CL
CM
5 – 7V
CH
11.4 – 13.5V
D, DD
18 – 29V
5 – 16V / 5 – 16V
E
EL
5 – 7V / 11 – 13V
EH
11 – 13V / 11 – 13V
EB
4.5 – 5.5V / 4.5 – 5.5V 9/9A
EQ
4.5 – 5.5V / 2.7 – 3.9V 9/9A
F
9 – 16V
G, GG
17.5 – 29V
H
18 – 32V / 18 – 32V
J, JJ
30 – 48V
K, KK
18 – 31V
L, LL
1.8 – 3.2V
M, MM
5 – 16V
N, NN
18 – 32V
P
18 – 29V / 5 – 16V
PL
22 – 26V / 5 – 7V
Q, QQ
2. 7 – 3.9V
R, RR
2. 7 – 3.9V
S, SS
1 – 5.7V
T, TT
1.8 – 3.2V
U, UU
10 – 21V
W, WW
4.5 – 5.5V
Z, ZZ
4.5 – 5.7V
A, AA & AL modules can be used in slots 1-5 up to 60A/channel.
•
BB & B modules can be used in slots 1-4 up to 25A/channel and in slots 5 up to 20A per channel.
•
C, CC, CL, CM & CH modules can be used in slots 1-5 up to 16A/channel if o/p is limited to 12V. At 15 to 16V C modules
•
can be used up to 12A/channel. Module derates linearly between 12 and 15V.
D & DD modules can be used in slots 1-5 up to 8A/channel.
•
E, EL & EH modules can be used in slots 1-3 up to 8A/channel and in slots 4 and 5 up to 6A/channel.
•
EB modules can be used in slots 1-5 up to 9A/channel
•
EQ modules can be used in slots 1-3 up to 9A/channel and in slots 4 and 5 up to 6.75A/channel
•
F & FF modules can be used in slots 1-5 up to 33A channel.
•
G & GG modules can be used in slots 1-5 up to 20A/channel.
•
H modules can be used in slots 1-3 up to 5A/channel and in slots 4 and 5 up to 4A/channel. For outputs voltages 30.01 to
•
32V maximum rated current is 1A.
Current Slots
Turns
60A
46mm
2
60A
46mm
2
60A
46mm
2
25A
23mm
1
25A
23mm
1
16A
23mm
1
1
16A
23mm
1
16A
23mm
1
8A
23mm
1
1
8/8A
23mm
1
8/8A
23mm
1
23mm
1
23mm
1
33A
46mm
2
25A
46mm
2
5/5A
23mm
1
10A
46mm
2
15A
35mm
2
25A
23mm
1
8A
23mm
1
5A
23mm
1
5/8A
23mm
1
5/8A
23mm
1
25A
23mm
1
60A
46mm
2
75A
46mm
2
60A
46mm
2
16A
23mm
1
15A
23mm
1
25A
23mm
1
Ampere-Turns
1
1
1
1
1
2
2
2
4
2/2
2/2
1/1
1/1
2
4
4/4
8
4
1
2
4
4/2
4/2
1
1
1
1
3
1
1
Page 16 of 26
Setting for
Max Current
Hazardous
Limit
Energy
>3V
60
>3V
60
60
>3V
-
25
-
25
>11.3V
32
>11.3V
32
>11.3V
>11.3V
32
>22.6V
32
-
16/16
-
-
16/16
-
9/9
-
9/9
>5.5V
66
>7.2V
100
-
20/20
>18.4V
80
>12V
60
25
-
16
-
20
-
20/16
-
20/16
-
25
>3V
60
>2.2V
75
>3V
60
>11.3V
48
-
15
-
25
17128 issue 34, June 2012
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