31
Instruction Manual
EL 3000 A Series
EN
Date: 12-05-2011
5. Installation
5.1 Visual check
After receipt, the unit has to be checked for signs of phy-
sical damage. If any damage can be found, the unit may
not be operated. Also contact your dealer immediately.
5.2 Mains connection
The mains connection is done with the included mains
cord.
The plug is a 10A mains plug as IEC 320 version. The
mains cord has a length of about 1.5m and a cross section
of 3 x 0.75mm².
The unit is fused with a 5 x 20mm safety fuse (M0.63A),
which is accessible at the rear side
5.3 Terminal DC input
The load input is located at the front side of the device.
The connection to any feeding source is done here by
Büschel plugs or screw & clamp. Always take care for
correct polarity! Only DC voltages allowed!
The input is
not
fused. In order to prevent damages by the
feeding source always observe the nominal values of the
electronic load! If necessary, install an extra fuse between
load and source, especially when discharging batteries.
The cross section of the load cables depend on the cur-
rent input. We recommend to use
up to
25A
:
2 x 1mm² or at least 1 x 4mm²
up to
60A
:
2 x 6mm² or at least 1 x 16mm²
per cable
(flexible wire).
Attention!
Max. current via the 4mm safety plug
contacts 32A!
5.4 Grounding the DC input
The inputs “+” und “-“ are not grounded, so that
one
of
them may be grounded, if necessary.
Attention! When grounding one of the input poles
always check if one of the output poles of the source
(eg. power supply) is also grounded. This could result
in a short-circuit!
5.5 Terminal AUX (remote sense)
The remote sense feature is wired at terminal
AUX
.
In order to compensate voltage drops over the load cables
(max. 1.1V per line) between feeding source and consu-
mer, the load can measure the voltage at the source via
the remote sense input poles at the terminal
AUX
and
regulates accordingly.
The terminal furthermore leads out a trigger signal via the
pins TRIG and GND. More information about the trigger
signal in section „6.7.3 Level A/B (pulsed operation)“.
The connection is done with correct polarity at the rear
side of the device at the terminal
AUX
, at pin 1 (+ Sen-
se) and pin 4 (–Sense). Recommended cross section:
0,2mm
2
– 2,5mm
2
flexible wire with cable end sleeves.
(+) Sense must only be connected to (+) output
and (–) Sense must only be connected to (–) output
of the feeding source. Else both device might get
damaged.
5.6 Interface card slot
The unit can be equipped with an optional, digital inter-
face card. The slot to insert the card is located at the rear
side. Further information about the interface cards can
be found in section 9., as well in the external instruction
manual of the interface cards.
About the device
