KEPCO ABC-DM SERIES - Manual (Page 30)

2-6
ABC 040104
specified performance at the output terminals would be transferred without impairment to any
load, regardless of electrical characteristics or proximity to each other.
The stabilized d-c power supply is definitely not an ideal voltage or current source, and practical
interfaces definitely fall short of the ideal. All voltage-stabilized power supplies have a finite
source impedance which increases with frequency, and all current-stabilized power supplies
have a finite shunt impedance which decreases with frequency. The method of interface
between the power supply output and the load must, therefore, take into account not only the
size with regard to minimum voltage drop, but the configuration with regard to minimizing the
impedance introduced by practical interconnection techniques (wire, bus bars, etc.). The series
inductance of the load wire must be as small as possible as compared to the source inductance
of the power supply: although the error sensing connection to the load compensates for the d-c
voltage drop in the power leads, it cannot compensate for the undesirable output effects of the
power lead inductance. These lead impedances (both power and sensing leads) are especially
important if the load: is constantly modulated or step-programmed; has primarily reactive char-
acteristics; or where the dynamic output response of the power supply is critical to load perfor-
mance.
2.7.5 LOAD CONNECTION - GENERAL
Load connections to the ABC power supply are achieved via the (+) and (–) binding posts
located on the front panel. A barrier strip is provided at the rear panel for connection to the load
(system applications).
NOTE REGARDLESS OF OUTPUT CONFIGURATION, OUTPUT SENSE LINES MUST BE
CONNECTED FOR OPERATION.
1. OBSERVE POLARITIES: The OUTPUT +S sensing wire must be connected to the
OUTPUT + load wire, and the OUTPUT –S sensing wire must be connected to the
OUTPUT – load wire.
2. IF LOCAL SENSING IS USED, INSTALL LINKS (see Figures 2-4 and 2-5). Links
may be installed at either the front or rear terminals, but not both (installing links at
both the front and rear will degrade power supply performance).