TDK-Lambda Genesys GENH Series User Manual page 46

Programmable dc power supplies 750w in a 1u half-rack size
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2. Wire size should be selected to enable voltage drop per lead to be less than 1.0V at the rated
current. Although units will compensate for up to 5V in each load wire, it is recommended to
minimize the voltage drop (1V typical maximum) to prevent excessive output power consum-
ption from the power supply and poor dynamic response to load changes. Please refer to
Tables 3-2 and 3-3 for maximum wire length to limit voltage drop in American and European
dimensions respectively.
Wire size
AWG
Ohm/1000ft
14
12
10
8
6
4
2
0
Table 3-2: Maximum wire length for 1V drop on lead (in feet)
Cross sect.
Resistivity
area
(mm ) 2
2.5
4
6
10
16
25
35
Table 3-3: Maximum wire length for 1V drop on lead (in meters)
For currents not shown in Table 3-2 and 3-3, use the formula:
where current is expressed in Amperes and resistivity in ohms/km or ohms/1000ft.
3.9.3 Wire termination
The wires should be properly terminated with terminals securely attached. DO NOT use unter-
minated wires for load connection at the power supply.
CAUTION
When local sensing, a short from +LS or +S to -
V or -S or -LS, will cause damage to the power
supply. Reversing the sense wires might cause
damage to the power supply in local and remote
sensing. (Do not connect -S to +V or +S to -V.)
Maximum length in Feet to limit
Resistivity
voltage drop to 1V or less
5A
10A
2.526
80
40
1.589
120
60
0.9994
200
100
0.6285
320
160
0.3953
500
250
0.2486
800
400
0.1564
1200
600
0.0983
2000
1000
Maximum length in meters to limit
voltage drop to 1V or less
Ohm/Km
5A
10A
8.21
24.0
12.0
5.09
39.2
18.6
3.39
59.0
29.4
1.95
102.6
51.2
1.24
160.0
80.0
0.795
250.0
125.0
354.0
177.0
0.565
Maximum length=1000/(current x resistivity)
Vermeiden Sie bei lokalem Sensing unbedingt
einen Kurzschluss zwischen -V und +LS oder
+S sowie zwischen -LS und -V oder -S. Ein
solcher Kurzschluss w rde das Netzteil
besch digen. Ein Vertauschen der Sense-
Leitungen kann das Netzteil bei lokalem wie bei
Remote-Sensing besch digen. (Verbinden Sie
daher nicht -S mit +V oder +S mit -V).
19
19
20A
50A
150A
20
8
2
30
12
3.4
50
20
6
80
32
10
125
50
16
200
80
26
300
125
40
500
200
68
20A
50A
150A
6.0
2.4
0.8
9.8
4.0
1.4
14.8
5.8
2.0
25.6
10.2
3.4
16.0
40.0
5.4
25.2
62.0
8.4
35.4
11.8
88.0
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