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APPENDIX

For current information see:

www.lappgroup.com

1201

Appendix

Glossary

Electric resistance

Resistance with which an electric circuit opposes the passage of the

current. Resistance is specified and measured in Ohms.

Electricity

Form of energy based on the flow of free electrons. Electricity is pro-

duced in generators.

Electromagnetic protection

Protection against faults that could affect the cable from outside

(immisions). Protection against faults caused by the cable (emissions).

Braid, e. g. copper (tin plated) → flexible → coverage. Protection against

external influences: mechanical, e.g. cables over edges; stepping on;

pulling of cables; chemical: e. g. oils; thermal: heat, cold.

Element

Individual component of cables, a collective term for cores, pairs, bun-

dles and carrier organs.

Elongation at break, ultimate elongation

Elongation at break is the ratio of the elongation to the initial length

when a break occurs.

Elongation, extension, stretch

Extension of a body by mechanical forces. In the cable industry, it is

tested using a mechanical testing method to determine the tensile

strength of all components.

ELOT

Hellenic Organization for Standardization. Certification body for

Greece.

EMC

Abbreviation for Electromagnetic Compatibility. The ability of a system,

machine or item of equipment to work satisfactorily in the electromag-

netic environment without itself causing any electromagnetic interfer-

ence that would be unacceptable for all systems, machines or equip-

ment in that environment.

EMK

Abbreviation for electromotive force.

EMS

Abbreviation for Electromagnetic Susceptibility. This is the functional

resistance of a specific object to electromagnetic interference factors.

Abbreviation for European Standards.

EPDM

Abbreviation for Ethylene Propylene Dien Monomer rubber. Chemically

cross-linked elastomer with good electrical insulating properties and

outstanding flexibility at low and high temperatures.

EPIC

Abbreviation for Environmental Protected Industrial Connector. Regis-

tered trademark, a robust industrial connector from Contact.

ePLAN

ePLAN

is the leading CAE software for planning electrical designs and

documentation in machine and plant construction. The Lapp item data

and the cable type file enable the individual cores in the ePLAN

circuit

diagram to be assigned automatically. ePLAN

is produced by ePLAN

Software & Service GmbH & Co.KG. See

www.eplan.de

EPR

Abbreviation for Ethylene Propylene Rubber.

Ethylene-Propylene- Rubber

See → EPDM

ETSI

Abbreviation for European Telecommunication Standards Institute. Its

duties include developing harmonised standards for an integrated

European communication system.

Explosive atmospheres

See VDE 0165 Part 1. Cables with a thermoplastic, duroplastic or min-

eral insulated metal sheath can be used for fixed routing. There may

not be any cavities in the core bundle (not hose cable). The extruded

embedding material and the fillers, if used (press extruded), must be

“non-hygroscopic”. Flame retardant in compliance with IEC 60332-1.

Cables for mobile and transportable equipment must have connecting

cables with an outer sheath made of heavyduty polychloroprene or an

equivalent synthetic elastomer or a heavy-duty rubber insulated cable

or connecting cables with a comparably robust construction.

Extension cord

A mobile cable assembled with a coupling connector and socket. The

couplings are integrally moulded onto the cable using thermoplastics

and contain protective contacts.

Extrusion line

It is powered by a motor and coils through a cylinder in a spiral. The

filler is made up of thermoplastic prepared in the form of granules.

Granules, i. e. a free-flowing mixture of grains of equal size, are the

delivery form of various plastics for cable manufacture; in other words,

an extruder is a system in which a continuous supply of granules is

heated, compressed, mixed and homogenised.

Farad

Unit of measurement for electrical capacitance.

FDDI

Abbreviation for Fibre Distributed Data Interface. Network type made

up of a double ring with a 100 Mbit/s transmission rate and using wave-

guides as the transmission medium.

Fibre cover

Made up of one or more materials and is used to mechanically insulate

the fibres and to protect them against damage.

Fieldbus technology

Sensors and actuators are conventionally connected to a controller or

evaluation unit using an analogue 4 – 20 mA signal. With this technol-

ogy, a 2-core cable is necessary for each connection between the

sensor or actuator and the controller. In addition, an input/output cir-

cuit (I/O) must be provided for each sensor and actuator in the control-

ler (normally a PLC or PC). The picture looks very different when using

a field bus system. In this case, all devices are connected to a bus

cable (2, 4 or 5 cores depending on the field bus system). An interface

card is used instead of the input/output circuits. This saves on I/O

cards, reduces the space required in the control cabinet and perma-

nently cuts the wiring costs. In conventional systems, information (e. g.

measured values or a fault signal) can only be transmitted in one direc-

tion and in very limited amounts. This can be from the sensor to the

controller or from the controller to the actuator. By contrast, in a field