thermocouple cables - southern cable cable catalogue.pdf · thermocouple cables in most cases...
TRANSCRIPT
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
THERMOCOUPLE CABLES Extension and Compensating Cable acc. to EN 50288-7
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
THERMOCOUPLE CABLES Extension and Compensating Cable acc. to EN 50288-7
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
THERMOCOUPLE CABLES Extension and Compensating Cable acc. to EN 50288-7
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
Pair in Metal Foil 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
THERMOCOUPLE CABLES Extension and Compensating Cable acc. to EN 50288-7
SOUTHERN CABLE
THERMOCOUPLE CABLES Extension and Compensating Cable acc. to EN 50288-7
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
THERMOCOUPLE CABLES Extension and Compensating Cable acc. to EN 50288-7
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
THERMOCOUPLE CABLES Extension and Compensating Cable acc. to EN 50288-7
» 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
Pair in Metal Foil 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