Output Connections - Agilent Technologies N8900 series Operating Manual

Connections-Single Unit
Single Load Connections
Multiple Load Connections
Remote Sense Connections

Output Connections

SHOCK HAZARD Turn off AC power before making rear panel connections.
HAZARDOUS VOLTAGES All models generate voltages in excess of 60 VDC, with some
models rated at up to 1,500 VDC! Ensure that all instrument connections, load wiring,
and load connections are either insulated or covered so that no accidental contact
with lethal output voltages can occur.
All output connections must be made with the unit turned off, and must be performed
by qualified personnel who are aware of the hazards involved. Improper actions can
cause fatal injury as well as equipment damage.
Never touch cables or connections immediately after turning off the unit. Depending on the model,
lethal voltages can remain at the output terminals for 10 seconds or more after turn-off. Verify that
there is no dangerous voltage on the output or sense terminals before touching them.
The following factors should be considered when wiring the load to the power supply:
Load wire current carrying capacity
l
Load wire insulation rating (must be equivalent to the maximum output voltage)
l
Load wire voltage drop
l
Load wire noise and impedance effect
l
Wire Sizes
FIRE HAZARD To satisfy safety requirements, load wires must be large enough not to
overheat when carrying the maximum short circuit current of the power supply. With
more than one load, any pair of load wires must be capable of safely carrying the full-
rated current of the supply.
The following table lists the characteristics of AWG (American Wire Gauge) copper wire. Paralleled wires may be sub-
stituted for single wires. For example, two AWG 3/0 (95 mm 2 ) cables may be paralleled for units rated at 510 A. Par-
alleled load wires may be required for larger-ampacity power supplies.
AWG
12
10
8
6
Agilent N8900 Series Operating and Service Guide
Nearest Metric size
4 mm 2
6 mm 2
10 mm 2
16 mm 2
Ampacity (Note1)
up to 30 A
up to 40 A
up to 60 A
up to 80 A
Connections-Single Unit
Resistance (Note2)
1.59
1.0
0.63
0.395
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