KEPCO EL Series Electronic Load Operator Manual P/N 243-1295 Firmware Version 3.12 (Unit Rev 2) - Manual (Page 25)

2-8
SERIES EL 070110
2.4 COOLING
The power devices used within the electronic load are maintained within their operating temper-
ature range by means of internal heat sink assemblies cooled by six cooling fans.
ALL INLET AND EXHAUST OPENINGS AT THE FRONT AND REAR OF THE ELECTRONIC
LOAD MUST BE KEPT CLEAR OF OBSTRUCTION TO ENSURE PROPER AIR ENTRY AND
EXHAUST.
These units are zero-clearance stackable, i.e., no top or side ventilation is required when rack
mounting. However, If the unit is rack mounted, or installed within a confined space, care must
be taken that the ambient temperature, which is the temperature of the air immediately sur-
rounding the load, does not rise above the specified limits (see Table 1-2).
2.5 INSTALLATION
WARNING!
The load is very heavy (80 - 90 pounds). Exercise care when lifting,
mounting or otherwise handling this product. It is recommended that
two or more persons handle the electronic load.
2.5.1 RACK MOUNTING
The unit is intended to be either used on a bench or mounted directly in a 19-inch wide rack.
These units are zero-clearance stackable, i.e., no top or side ventilation is required when rack
mounting (see cooling, PAR. 2.4). Optional slides (see Table 1-5) can be used.
Four front panel mounting holes are provided. When optional slides are not used, additional
support is required.
When at least 1/2U space is available at the bottom, either a bottom support platform (shelf) or
side support brackets can be used. Contact factory for proper bracket depending on rail set-
back.
For zero-clearance stacking, support must be provided at the rear; contact factory for details.
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.