Setting Of Cable (Wire) Resistance; Standard Battery-Connecting Cables; Calculation Of Cable Resistance - Eltek MultiCharger 1500 Description And Operating Instructions

Setting of cable (wire) resistance

Setting of cable (wire) resistance
The new software version of the MC1500 includes a cable (resistance) compensation to
compensate for voltage drop at the connecting cables of the battery.

4.1 Standard battery-connecting cables

In the delivery condition, a cable resistance of 15 mΩ is preset. This applies for a
5 meter/16 mm² battery connecting cable. If a different cable length or a different conductor
cross-section is used, the cable resistance has to be adjusted in the service menu
(see section 10.7).
Cable-resistance values of the battery's standard connecting cable:
Cable length/conductor cross-section:
5m/16mm²
7m/16mm²

4.2 Calculation of cable resistance

The cable resistance is calculated according to the following equation:
Example of a 5m battery connecting cable:
Cable length (��): 5m
Electrical conductivity of copper (ĸ): 56m/(Ωmm²)
Conductor cross-section (��): 16mm²
Transfer (contact) resistance = ��_transfer: 4m٠(transfer resistance of clamps and screw
Calculation of cable resistance
2280073 Rev.1
cable resistance:
15mΩ
20mΩ
2 ∗ ��
cable resistance =
ĸ ∗ ��
connections)
 ((2  5) / (56  16))  0.004
 0.01516Ω
 15mΩ
+ ��_transfer
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