TYPICAL CHARACTERISTICS OF VARIOUS INSULATION MATERIAL FOR CABLES
Insulation compounds | ||||||||||||||
Thermoplastics | Crosslinked materials | |||||||||||||
Abbreviation (1) | PVC | PE | PBT-FR | TPE-E | ETFE | FEP | PTFE | EPR | PE-X | RX 125 | RX 1555 | RX 155 | PVDF-X | SIR |
CENELEC-type | T11 | E16 | ||||||||||||
Thermal characteristics | ||||||||||||||
Thermal resistance 20,000 h (°C) | 70 | 70 | 110 | 110 | 135 | 180 | 250 | 90 | 90 | 120 | 130 | 135 | 135 | 180 |
Thermal resistance 24 h (°C) | 100 | 100 | 160 | 160 | 220 | 240 | 300 | 180 | 180 | 200 | 220 | 220 | 220 | 260 |
Short circuit (°C) | 160 | 100 | 160 | 160 | 250 | 250 | 300 | 250 | 250 | 280 | 280 | 280 | 300 | 350 |
Resistance to cold, moving (°C) | -5 | -55 | -40 | -40 | -55 | -55 | -70 | -40 | -55 | -40 | -55 | -55 | -55 | -55 |
Mechanical characteristics | ||||||||||||||
Tensile strength (N/mm²) | >12.5 | >10 | >25 | >30 | >30 | >10 | >20 | >5.0 | >12.5 | >12.5 | >12.5 | >15 | >28 | >5.0 |
Elongation at break (%) | >125 | >300 | >200 | >150 | >200 | >200 | >200 | >200 | >200 | >200 | >200 | >200 | >200 | >150 |
Abrasion resistance | S | Good | Good | E | E | S | S | S | E | Good | E | Good | E | poor |
Flexibility (2) | S | poor | poor | poor | poor | poor | poor | poor | poor | S | poor | S | poor | E |
Electrical characteristics | ||||||||||||||
Volume resistivity at 20°C (Ωcm) | 10 e14 | 10 e16 | 10 e15 | 10 e15 | 10 e16 | 10 e18 | 10 e18 | 10 e15 | 10 e16 | 10 e14 | 10 e16 | 10 e16 | 10 e14 | 10 e15 |
Dielectric constant at 1 kHz | 5.0 | 2.3 | 3.7 | 3.8 | 2.6 | 2.2 | 2.0 | 3.0 | 2.4 | 4.2 | 2.6 | 2.8 | 5.7 | 3.0 |
Fire characteristics | ||||||||||||||
Flame retardant | Yes | No | Yes | No | Yes | Yes | Yes | No | No | Yes | Yes | Yes | Yes | Yes |
Halogen free | No | Yes | Yes | Yes | No | No | No | Yes | Yes | Yes | No | No | No | Yes |
Corrosive combustion gases | Yes | No | No | No | Yes | Yes | Yes | No | No | No | Yes | Yes | Yes | No |
Smoke generation | Strong | aver. | aver. | aver. | low | low | low | aver. | aver. | low | strong | strong | low | aver. |
Resistance to | ||||||||||||||
Ionizing radiation (kGy) | 100 | 1000 | 1000 | 1000 | 2000 | 100 | 100 | 2000 | 1000 | 1000 | 1000 | 1000 | 1000 | 500 |
Solvents (3) | S | S | Good | Good | E | E | E | S | S | S | Good | S | E | S |
Oils and fuels (3) | S | S | Good | Good | E | E | E | poor | S | S | Good | S | E | S |
Acids and alkaline solutions (3) | Good | E | S | S | E | E | E | E | E | Good | Good | Good | E | S |
Water/Hydrolysis (3) | Good | E | S | S | E | E | E | Good | E | Good | E | E | E | E |
Weather/UV radiation | Good | poor | Good | Good | E | E | E | Good | S | Good | Good | Good | E | E |
Förkortningar: E = Excellent, S = Satisfactoring, aver. = average
(1) RX = RADOX, for other abbreviations, see Material designations.
(2) depends greatly on cable construction
(3) influenced by type, time and medium temperature