Conductix-Wampfler Cables for Reeling Systems

64
Technical Exhibit
Introduction
Low-voltage and high-voltage cables for moving systems and lifting gear must be selected according to their intended use. Here,
in particular the cable guidance system (spiral winding, cylindrical winding, with/without guiding funnel, etc.) and the specified
operational and installation conditions must be taken into consideration.
It must also be ensured that the ends of cables are protected from the penetration of moisture and humidity. Thermal and/or chemical
influences should equally be considered during selection of the cable type.
Flexible cables as shown here are generally NOT suitable for routing UNDERGROUND!
Temporary covering by sand, gravel or other, similar materials, is not considered underground.
When connecting to moving, mobile systems and lifting gear, flexible low- and high-voltage cables must be protected from damage
due to fasteners, twists, kinks, and snarls. Another important topic is tension relief, which is covered thoroughly on page 68.
Voltage
For different cable voltages, the
definitions in DIN VDE 0298 Part 3
apply, which will be excerpted below.
AC (alternating current)
DC (direct current)
Rated voltage
The rated voltage of an insulated
high-tension cable is the voltage on
which the design and testing of the
cable is based, based on the electrical
properties of the cable.
The rated voltage is specified in V or KV
by the two values Vo and V.
Uo Effective value between an external
conductor and the ground conductor
U Effective value between two external
conductors of a multi-strand cable
or a system of single-strand cables.
In systems with alternating current, the
rated voltage of the cable must be at
least equal to the rated voltage of the
system in which it is used. This applies
to both the value Uo as well as the
value U.
In systems with direct current, it must
be ensured that it does not exceed
1.5 times the permissible total voltage.
Operating voltage
This is the voltage applied locally and
momentarily between the conductors
and the ground of a high-tension
system in undisturbed operation.
Cables with rated voltages Uo/U up
to 450/750 V are suitable for use in
three-phase, AC, and DC systems
whose highest permanent permissible
operating voltage does not exceed the
rated voltage of the cable by more than
10%.
For cables with a rated voltage
Uo/U ≥ 0.6/1 kV, this limit is 20%.
Test voltage
The corresponding specifications of
DIN VDE 0250 apply.
We can provide electrical testing
protocols upon request.