3.9 CONNECTING THE LOAD

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.

3.9.1Load 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 dimensions respectively.

Wire size

Resistivity

 

Maximum length in Feet to limit

 

 

voltage drop to 1V or less

 

AWG

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)

19

83-515-000 Rev. B

Page 27
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TDK 5KW technical manual Connecting the Load, Load Wiring, Current Carrying Capacity, Awg

5KW specifications

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