KEPCO MBT Series - Manual (Page 35)

MBTSVC 111609
2-11
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 size
with regard to minimum voltage drop, but 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: error sensing cannot compensate for reactive effects due to this. These dynamic
conditions are especially important if the load is constantly modulated or step-programmed, or
has primarily reactive characteristics, or where the dynamic output response of the power sup-
ply is critical to load performance.
2.7.5 LOAD CONNECTION - GENERAL
Load connections to the MBT power supply are achieved via the OUTPUT and COMMON bind-
ing posts located on the rear panel. A barrier strip is provided at the rear panel for connection of
error sensing and monitor connections.
NOTE REGARDLESS OF OUTPUT CONFIGURATION, OUTPUT SENSE LINES MUST BE
CONNECTED FOR OPERATION. OBSERVE POLARITIES: THE OUTPUT S SENS-
ING WIRE MUST BE CONNECTED TO THE OUTPUT LOAD WIRE, AND THE COM
S SENSING WIRE MUST BE CONNECTED TO THE COMMON LOAD WIRE. IF
LOCAL SENSING IS USED, INSTALL LINKS AS SHOWN IN FIGURE 2-3.
For M and MG units (non-“R” option), the OUTPUT binding post is always positive with respect
to COMMON. For MR and MGR units, the OUTPUT is positive with respect to COMMON when
polarity is nonreversed, negative with respect to COMMON when polarity is reversed.
2.7.6 LOAD CONNECTION USING LOCAL SENSING
Figure 2-5 shows a typical configuration using local sensing and a grounded load; Figure 2-6
shows a typical configuration using local sensing with an isolated (“floating”) load.
2.7.7 LOAD CONNECTION USING REMOTE SENSING
Figure 2-7 shows a typical configuration using remote sensing and a grounded load; Figure 2-8
shows a typical configuration using remote sensing with an isolated (“floating”) load.
2.8 OPERATING CONFIGURATION
The complete operating configuration is defined by
• The Model Number (e.g. MBT 100-3.6M)
• Options included (“G” or “R,” see PAR. 1.5)
• Jumper configuration of internal boards.
Table 2-4 lists the location of the internal jumpers and their function. This information is provided
for reference purposes only, to indicate the configuration options available. Do not attempt to
alter the jumper configuration. For assistance in changing any jumper-selected parameter con-
tact Kepco applications engineering.