External Sense Connection - Pacific Power Source AMX Series Operation Manual

SECTION 3 INSTALLATION
3.7

EXTERNAL SENSE CONNECTION

This paragraph describes connection of external sense leads to the AMX-Series Power
Source. External Sense wire size and methods are discussed.
The AMX-Series Power Source contains External Sense Circuits. These circuits measure
output voltage at an external sense point. Since this feature can be completely disabled, the
wiring detailed in this paragraph is optional. If the External Sense feature is desired, connect
the sense wires as described here.
LETHAL VOLTAGES ARE PRESENT AT THE OUTPUT TERMINALS OF THIS MACHINE !
REFER OUTPUT CONNECTION TO A QUALIFIED ELECTRICIAN.
Figures 3.7.1 and 3.7.2 show external sense wiring for 1, 2, and 3φ systems. There is little
or no current flowing through the External Sense metering lines. Standard 22 AWG, 600 Volt
(0.050" or 1.27mm ) control wire is recommended for this application. Twisting the External
Sense wiring is recommended and, in some cases, can improve performance. In noisy
environments, shielding may become necessary.
ground the shield at one end only, to prevent the possibility of creating a ground loop.
When wiring the External Sense Leads to a DELTA load (refer to paragraph 3.4.3), connect
the Neutral terminal of the External Sense Terminal block to the Neutral terminal of the Output
Terminal block.
When the neutral wire is not used by the load on a split phase output (2 Phase Output Mode,
refer to paragraph 3.4.2), connect the Neutral terminal of the External Sense Terminal block to
the Neutral terminal of the Output Power Terminal block. In cases where the load has a
neutral terminal, connect the neutral lead from External Sense Terminal block to the neutral
terminal of the load.
WARNING
78
If shielded cable is used, be sure to