Lambda 2U GENESYS 5kW, Техническое руководство

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83-515-000 Rev. A
19
3.9 CONNECTING THE LOAD
3.9.1 Load Wiring
The following considerations should be made to select wiring for connecting the load to the power
supply:
∗
Current carrying capacity of the wire (refer to Section 3.9.2)
∗
Insulation rating of the wire should be at least equivalent to the maximum output voltage of the
power supply.
∗
Maximum wire length and voltage drop (refer to Section 3.9.2)
∗
Noise and impedance effects of the load wiring (refer to Section 3.9.4).
3.9.2 Current Carrying Capacity
Two factors must be considered when selecting the wire size:
1. Wires should be at least heavy enough not to overheat while carrying the power supply load
current at the rated load, or the current that would flow in the event the load wires were
shorted, whichever is greater.
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 consump-
tion from the power supply and poor dynamic response to load changes. Please refer to Ta-
bles 3-2 and 3-3 for maximum wire length (to limit voltage drop) in American and European di-
mensions respectively.
Maximum length in Feet to limit
voltage drop to 1V or less
Wire size
AWG
Resistivity
OHM/1000ft
10A 20A 50A 100A 200A 400A
14 2.526 40 20 8 4 2 ---
12 1.589 60 30 12 6 3 ---
10 0.9994 100 50 20 10 5 2
8 0.6285 160 80 32 15 8 4
6 0.3953 250 125 50 25 12 6
4 0.2486 400 200 80 40 20 10
2 0.1564 600 300 125 60 30 15
0 0.0983 1000 500 200 100 50 25
Table 3-2: Maximum wire length for 1V drop on lead (in feet)
WARNING
Turn Off the AC input power before making or changing any
rear panel connection. Ensure that all connections are se-
curely tightened before applying power. There is a potential
shock hazard when using a power supply with a rated output
greater than 40V.