KEPCO EL Series Electronic Load Operator Manual P/N 243-1295 Firmware Version 3.22 through 3.41 - Manual (Page 27)

SERIES EL 062011
2-9
2.6 WIRING INSTRUCTIONS
Interconnections between an a-c power source and the load, and between the load and the unit
under test are as critical as the interface between other types of electronic equipment. Figure 2-
7 illustrates connections for a typical test setup.
Series EL is provided with a three-terminal IEC appliance coupler for connection of the mains
supply source, one terminal of which is dedicated for the protective earthing conductor; no other
ground or earth connection is required, although the chassis may be separately connected to
earth ground for noise or other reasons, such as user or site requirements.
FIGURE 2-7. TYPICAL INTERCONNECTIONS
2.6.1 MAINS POWER
Mains power is connected at the rear panel of the Series EL Electronic Load (see Figure 2-3)
via the IEC 320-style recessed power inlet connector, which provides interface to the three-wire
safety line cord (supplied) via a polarized mating plug. (see PAR. 2.3 for mains power require-
ments).
It is recommended that the 1/4-inch bolt with wingnut and flat washers (supplied) at the top left
of the rear panel be connected to earth ground.
2.6.2 UNIT UNDER TEST (UUT) TO LOAD CONNECTION
WARNING!
Loose test connections between the UUT and the Series EL load can
lead to load instability, erratic operation and possible equipment
damage. In addition, loose connections or insufficiently sized
conductors can become very hot and cause burns.
2.6.2.1 POWER CONNECTIONS
Connections between the UUT and the Series EL Electronic Load are achieved via the (+) and
(–) LOAD terminals located on the rear panel.