Connecting The Load; Load Wiring; Current Carrying Capacity - Delta D750 User Manual

User Manual
D750
DC Power Supply

2.8 Connecting The Load

Turn off the AC input power before making or changing any rear panel connection. Ensure
that all connections are securely tightened before applying power. There is a potential
shock hazard when using a power supply with a rated output greater than 40V.

2.8.1 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 2.8.2)
*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 2.8.2)
*Noise and impedance effects of the load wiring (refer to 2.8.4).

2.8.2 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 consumption from the power supply and poor dynamic response to load
changes. Please refer to Tables 2-2 and 2-3 for maximum wire length to limit voltage
drop in American and European dimensions respectively.
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