Copperhead Conductor Systems - VAHLE - #20

IX HEATING SYSTEMS FOR ICING CONDITIONS

Determine a heating cable of 30 to 45 W/m capacity.

If no suitable result from adjacent dia­grams, devide the length of the system into two or more heating sections.

Supply lower voltage via a transformer in case of shorter heating sections.

35

20

30

40

50

60

70

80

90

100

/ /my

50

U = Supply voltage [Volt]

R = Resistance of heating cable [Ohm/m]

L = Length of heating sections [m]

heating cable: H 0.48 — 0.48 Ohm/m heating cable: H 0.70 — 0.70 Ohm/m heating cable: H 0.90 — • r00 Ohm/m heating cable: H • »44 — • »44 Ohm/m heating cable: H 2.00 — 2.00 Ohm/m

Tolerance: ± 2.5% Outside diameter: ca. 4 mm

20

30

40

50

60

70

80

90

100

/ M

Composition of heating cable: Conductor: resistor material CrNi, stranded

Insulation: TFE-(Teflon-)insulation, natural colour, glass silk sheath

Sheath: V2Awire

Length of conductor raiU^_ (length of heating section)

Scheme of heating system for one section

? ?

Supply voltage 220 or 380 V

L1 L2 L3 — Length of conductor rail

Length of 3rd heating section

— Length of 2nd heating section-

- Length of 1 st heating section

Conductor rail

4

Heating cable with terminal clamp

Connection of insulated , conductor cable NSYAF -<r 2,5 mm²

? ?

--L1 supply voltage

-L2

___L3 220 or 380 V

Scheme of heating system for more than one section