7/8'' aluminum feeder cable

                                                                                        Type No.

Standard cable                                                          7/8

Fire-retardant cable                         

Construction                                 

Inner conductor

Material

Copper tube

Diameter(mm)

9.40±0.10

Insulation

Material

Foamed PE

Diameter(mm)

22.8±0.25

Outer conductor

Material

Annular corrugated Aluminum tube

Diameter(mm)

25.3±0.25

Jacket

Material

LLDPE or fire-retardant PE

Min.thickness(mm)

>1.1

Diameter(mm)

27.50±0.25

Electrical  Characteristics                                    

Inner conductor DC resistance(Ω/km)

1.42

Outer conductor DC resistance(Ω/km)

1.30

Characteristic impedance(Ω)

50

Capacitance(p F/m)

73

Velocity(%)

91

Dielectric strength(KV)

8.0

Insulation resistance(MΩ/km)

>1×104

Peak power rating(KV)

91

Shielding attenuation,(dB)

>>120

Cut-off frequency(GHz)

5.2

Attenuation and Average power(Maximum attenuation value shall be 105% of the nominal attenuation value)                     

Frequency

(MHz)

Attenuation

(@20℃,d B/100m)

Average  power(kv)

200

1.75

4.83

450

2.71

2.88

800

3.67

2.09

900

3.89

1.98

1000

4.16

1.92

1500

5.19

1.55

1800

5.82

1.35

2000

6.09

1.30

2200

6.47

1.26

2500

6.86

1.20

3000

7.74

1.08

VSWR                                        

320MHz~480MHz

1.10

820MHz~960MHz

1.12

1700MHz~2250MHz

1.15