thermocouple cables - southern cable cable catalogue.pdf · thermocouple cables in most cases...

THERMOCOUPLECABLES

THERMOELECTRICITYWhen a metallic conductor is exposed to a difference of temperature between the two extremities, anelectromotive force (emf) is generated by the temperature gradient, which causes a redistribution of theelectrons through the conductor. The EMF value depends on the material and the temperature gradient.

Let’s consider two materials, generically denominated A and B, exposed to the same difference oftemperature between their extremities. In each one an electromotive force will result. The EMF valuedepends on the type of material and the temperature gradient. In case of a homogeneous material the EMFvalue depends solely on the difference of temperature between the extremities.

The phenomenon described above is fundamental to understand the thermoelectricity and its applications tomeasurement of temperature it’s called See beck Effect, which is what creates the sensor known asthermocouple or thermoelectric couple. Elements A and B that make up a thermocouple are denominatedThermo elements.

In the configuration of a thermocouple, the extremity at which the thermo elements are joined is calledMeasuring (or hot) Junction. If the temperature of the Reference (or cold) Junction, the other extremity, isfixed at 0°C, then the EMF value will depend solely on the temperature of the Measuring (or hot) Junction.

Extension and Compensating cablesExtension and compensating cables shall have temperature-EMF characteristics similar to the thermocouplewith which they should be connected to transfer signals from the Measuring (or hot) Junction to theReference (or cold) Junction.

Extension cables comprise conductors with the same nominal composition as the correspondingthermocouple; compensating cables comprise conductors with different nominal composition but sametemperature – EMF characteristics as the corresponding thermocouple.

THERMOCOUPLE CABLES

SOUTHERN CABLE

THERMOCOUPLE CABLES

Table 1 :

SOUTHERN CABLE

Table 2 : Loop Resistance at 20°C (nominal value in Ω/km)

Thermocouple

Conductor material Conductor Size

IEC 605840.5 mm2 0.8 mm2 1.0 mm2 1.3 mm2 1.5 mm2

0.8 mm Ø 1.02 mm Ø 1.13 mm Ø 1.29 mm Ø 1.38 mm Ø

Solid Ω/km

J JX 1257 769 628 483 418

T TX 1044 639 522 402 348

E EX 2493 155 1246 958 831

K KX 2039 1248 1020 785 680

K KCB 1044 639 522 402 348

K KCA 1298 794 649 499 433

THERMOCOUPLE CABLES

In most cases thermocouples are connected to otherprocessing instruments by connecting cables.Connecting cables are divided into compensating cablesand extension cables. These can again be divided intosolid and stranded conductors.

Extension cables are connecting cables with conductorsmade of thermocouple material, i.e. of the samematerial as the thermocouple itself. Extension cablestherefore are subject to the same accuracy limits as thethermocouples. Extension cables are marked with an“X“ behind the identification letter for thethermocouple.

For example, “KX“ means that the cable is an extensioncable / insulated thermocouple wire for thethermocouple type K (NiCr-Ni).

Compensation cables are connecting cables withconductors made of materials which only in a limitedtemperature range have the same thermoelectricproperties as the thermocouple itself. Compensatingcables are marked with a “C“ behind the identificationletter for the thermocouple.

For example, “KC“ means that the cable is acompensating cable for the thermocouple type K.

The insulation of the conductors as well as of the sheaths can be made of a variety of materials.

The following criteria must be taken into considerationwhen selecting the appropriate material: chemical andmechanical resistance against the ambient conditions,temperature range, insulation resistance, flexibility,outside diameter, screening etc.

Apart from that there is a large number of cable typesavailable as compensating cables or extension cables aswell as those with more than two inner conductors.

Many special designs are available upon request, mostof them on a short term basis.

SOUTHERN CABLE

THERMOCOUPLE CABLES Extension and Compensating Cable acc. to EN 50288-7

Common Types 300 V

Extension and Compensating Cable

Solid conductor pairs, individual and/or overall static screen.

Common Types300 V

Halogen-free, flame retardant types

300 V

Fire resistance, Flame retardant types

500V

PE or XLPE(70°C) (90°C)

Insulated/LSOH-sheathed

PVC or PVCw or PE or XLPE(70°C) (105°C) (70°C) (90°C)

Insulated/PVC-sheathed

Non-Armoured Armoured Non-

Armoured Armoured

SOUTHERN CABLE


Common Types 300 V

Single & Multipair, Individual and/or Collective screen, PVC-sheath» Non-Armoured» Armoured» With or without chemical protection, armoured

Type of insulation/sheath

Type of cabling elements

No.of cabling elements

Conductor material

Conductor sizes

1. Non-Armoured types» Laying

» Bending radius

2. Armoured types» Laying

» Bending radius

3. Temperature range» During operation» During installation

4. Reaction to fire» Flame propagationa) Test on single cableb) Test on bunched cables

Application

SC-02 SC-03 SC-04

Technical Data

PVC/PVC PVCw/PVCw PE/PVC XLPE/PVC

Pair, Pair in Metal Foil

1, 2, 4, 5, 6, 8, 10, 12, 16, 20, 24

Extension or compensating material acc. to IEC 60584-3 / see Table 1, page ii

0.8 mm, 1.02 mm, 1.13 mm, 1.29 mm, 1.38 mm

SC-01

SC-05 SC-06 SC-07 SC-08

Recommended for indoor and outdoor installation, on racks,trays, in conduits, in dry and wet locations

7.5 x cable Ø

IEC 60332-1IEC 60332-3

For transmission of thermoelectric voltage from measuring junction to reference junction; allowed for use in zone 1 and zone 2, group II (IEC 60079-14)

Recommended for indoor and outdoor installation, on racks,trays, in conduits, in dry and wet locations, for direct burial

10 x cable Ø

- 30°C up to 70°C- 5°C up to 50°C

- 30°C up to 105°C- 5°C up to 50°C

- 30°C up to 70°C- 5°C up to 50°C

- 30°C up to 90°C- 5°C up to 50°C

SOUTHERN CABLE


Common Types 300 V

Single & Multipair, Individual and/or Collective screen, PVC-sheath● Non-Armoured● Armoured● With or without chemical protec on, armoured

Construction

Product Type

Conductor

» cross-section (mm2)» conductor design (mm)

Insulation materials ● Cross linked Polyethylene (XLPE) or● Polyethylene (PE) or● Polyvinylchloride (PVC) or● Polyvinylchloride heat resistant PVCw

Cabling element 1)

» without ind. Screen» with ind. Screen

Colour

Marking

Length1) Colour code of cabling elements : see Table 12) RP = Reduced flame propagation

1000 meter/Drum

Extension or compensating material acc. to IEC 60584-3

Outer sheath PVC and PVCw resp. ,see Table 1, page ii

e.g: SOUTHERN CABLE . EXTENSION OR COMPENSATING CABLE . STANDARD .

RATED VOLTAGE . RP2) . LENGTH MARKING

Inner sheath -- PVC and PVCw resp., black

Armouring -- Galvanised steel wire armouring;

Individual screen Aluminium/Plastic-tape over solid tinned copper drain wire, 0.6 mmplastic tape under and above screen

Wrapping at least one plastic tape above cable core

Overall screen Aluminium/Plastic-tape over solid tinned copper drain wire 0.5 mm2 / 20 x 0.18 mm

1.51 x 1.38

0.5

Armoured TypesNon-Armoured Types

PairPair in Metal Foil

1 x 0.80.75

1 x 1.021.0

1 x 1.131.3

1 x 1.29

wire Ø depending on cable- Ø under armouring, at least 0.9 mm

SOUTHERN CABLE


Common Types 300 V

Single & Multipair, Individual and/or Collective screen, PVC-sheath» Non-Armoured» Armoured» With or without chemical protection, armoured

Electrical Data at 20°C

Properties Character Unit

Conductor sizes nom. mm2 0.5 0.75 1.0 1.3 1.5

Conductor resistance (Loop) max. Ω/km

Insulation resistance ● PVC / PVCw - insula on min. MΩ.km

● PE/ XLPE - insula on min. MΩ.km

Mutual capacitance● PVC / PVCw - insula on Pair1), 2) max. nF/km

Pair in Metal Foil max. nF/km

● PE / XLPE - insula on Pair1), 2) max. nF/km


Test Voltage● Core/Core (Urms) V

● Core/Screen (Urms) V

Operating voltage (Urms) max. V

1) Values for cables with 1 element correspond to those for Pair in Metal Foi l2) Values for cables with 2 up to 4 elements + 20%

1500

300

300 V

see Table 2, page ii

100

5000

150

190

160

200

115 115

1500

75 85

SOUTHERN CABLE

Halogen-free, flame retardant types 300 V

Extension and Compensating Cable

Solid conductor pairs, individual and/or overall static screen.

Common Types300 V

Halogen-free, flame retardant types

300 V

Fire resistance, Flame retardant types

500V

PE or XLPE(70°C) (90°C)

Insulated/LSOH-sheathed

PVC or PVCw or PE or XLPE(70°C) (105°C) (70°C) (90°C)

Insulated/PVC-sheathed

Non-Armoured Armoured Non-

Armoured Armoured


SOUTHERN CABLE


Halogen-free, flame retardant Types 300 V

Single & Multipair, Individual and/or Collective screen, PVC-sheath» Non-Armoured» Armoured

Technical Data

Type of insulation/sheath

Type of cabling elements

No.of cabling elements

Conductor material

Conductor sizes

1. Non-Armoured types» Laying

» Bending radius

2. Armoured types» Laying

» Bending radius

3. Temperature range» During operation» During installation

4. Reaction to fire» Flame propagationa) Test on single cableb) Test on bunched cables

a) amount of halogen acid gasb) degree of acidity of gases

Measurement of smoke density

Application

PE/LSOH XLPE/LSOH

Extension or compensating material acc. to IEC 60584-3 / see Table 1, page ii

0.5 mm2, 0.75 mm2, 1.0 mm2, 1.3 mm2, 1.5 mm2

SC/LSOH-01 SC/LSOH-02

Pair, Pair in Metal Foil

1, 2, 4, 5, 6, 8, 10, 12, 16, 20, 24

Recommended for indoor and outdoor installation, on racks,trays, in conduits, in dry and wet locations

7.5 x cable Ø

SC/LSOH-03 SC/LSOH-04Recommended for indoor and outdoor installation, on racks,trays, in conduits, in dry and wet locations, for direct burial

10 x cable Ø

- 30°C up to 70°C - 30°C up to 70°C

IEC 60332-1IEC 60332-3

- 5°C up to 50°C - 5°C up to 50°C

» Test on gases evolved during combustion:

IEC 60754-1 (0%)IEC 60754-2 (pH > 4.3, c < 10µS/mm)

IEC 61304-2 (Light transmission > 60%)

For transmission of thermoelectric voltage from measuring junction to reference junction; al lowed for use in zone 1 and zone 2, group II, classified areas (IEC 60079-14)

SOUTHERN CABLE


Halogen-free, flame retardant Types 300 V

Single & Multipair, Individual and/or Collective screen, PVC-sheath● Non-Armoured● Armoured

Construction

Product Type

Conductor

» cross-section (mm2)» conductor design (mm)

Insulation materials ● Polyethylene (PE) or● Cross linked Polyethylene (XLPE) or

Cabling element 1)

» without ind. Screen» with ind. Screen

Colour

Marking

Length1) Colour code of cabling elements : see Appendix 1, Table 1

black or blue for intrinsically safe systems

e.g: SOUTHERN CABLE . EXTENSION OR COMPENSATING CABLE . STANDARD . RATED VOLTAGE . LSOH . LENGTH MARKING

1000 meter/Drum

Extension or compensating material acc. to IEC 60584-3

plastic tape under and above screen

1 x 0.8 1 x 1.02 1 x 1.13 1 x 1.29 1 x 1.38

Outer sheath LSOH

Inner sheath -- LSOH, black

Armouring -- Galvanised steel wire armouring;wire Ø depending on cable- Ø under

armouring, at least 0.9 mm

Wrapping at least one plastic tape above cable core

Overall screen Aluminium/Plastic-tape over solid tinned copper drain wire 0.5 mm2 / 20 x 0.18 mm

PairPair in Metal Foil

Individual screen Aluminium/Plastic-tape over solid tinned copper drain wire, 0.6 mm

Non-Armoured Types Armoured Types

0.5 0.75 1.0 1.3 1.5

SOUTHERN CABLE


» Non-Armoured» Armoured

Electrical Data at 20°C

Properties Character Unit

Conductor sizes nom. mm2 0.5 0.75 1.0 1.3 1.5

Conductor resistance (Loop) max. Ω/km

Insulation resistance ● PE/ XLPE - insula on min. MΩ.km

Inductance max. mH/km

Mutual capacitance● PE / XLPE - insula on Pair1), 2) max. nF/km


Test Voltage● Core/Core (Urms) V

● Core/Screen (Urms) V

Operating voltage (Urms) max. V

1) Values for cables with 1 element correspond to those for Pair in Metal Foil2) Values for cables with 2 up to 4 elements + 20%

300

1

75 85

115 115

300 V

see Table 2, page ii

5000

1500

1500

SOUTHERN CABLE

thermocouple cables - southern cable cable catalogue.pdf · thermocouple cables in most cases...

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