5.4 Strain Clamps
5.4.1 NLL series Aluminium alloy strain clamp
NLL series aluminium alloy strain clamp (Blot type ) is suitable for aerial line up to 10kV,fixing aluminium wire or steel core aluminium wire on the strain pole ,aerial insulation aluminium conductor and insulation aluminium cover are being used together, It’s action is insulation protection.
1.The body is made of high-strength aluminium alloy
2.Smooth surface long servile life
3.Easy installation
4.No waste electric energy
Specification
Type | conductor Dia | U bolt | broken load kN | Conductor(mm2) | ||
No. | Dia | 1KV | 10KV | |||
NLL-1 | 5.0~10.0 | 2 | M12 | 40 | 25-70 | 10-25 |
NLL-2 | 10.1~14.0 | 2 | M12 | 40 | 50-120 | 25-50 |
NLL-3 | 14.1~18.0 | 3 | M14 | 70 | 120-240 | 70-120 |
NLL-4 | 18.1~23.0 | 3 | M14 | 90 | 185-300 | 150-240 |
NLL-5 | 23.0~29.0 | 5 | M16 | 100 |
| 300 |
5.4.2 Strain clamp
NXJ Series is suitable for strain clamp insulation string of 10kV aerial insulation aluminium core wire JKLYJ terminal or two ends fixing and tighten aerial insulation
1.The shell made of anti-oxidate high strength aluminum alloy.
2.The core of wedge made of insulating reinforce plastics, withstand voltage : ≥18kV not breakdown one min.
3.Not remove the insulation layer,AI-core wire are current use..
4.Without waste power
5.Wedge structure
Specification
Strain clampstype |
|
| Aerial insulation aluminiumconducor/10kV |
| Failure load (kN) |
????Dia(mm) | ????Dia(mm) | ||||
NXJ-1Q | 25 | 8.4 | 14.8 | 2.5 | 10.5 |
35 | 9.8 | 15.8 | 3.4 | ||
50 | 11.2 | 17.1 | 4.6 | ||
70 | 12.8 | 18.8 | 6.7 | ||
NXJ-2Q | 50 | 11.2 | 17.1 | 4.6 | 34.7 |
70 | 12.8 | 18.8 | 6.7 | ||
95 | 14.8 | 20.4 | 8.9 | ||
120 | 16.2 | 21.8 | 11.3 | ||
NXJ-3Q | 120 | 16.2 | 21.8 | 11.3 | 43.4 |
150 | 18.2 | 23.4 | 13.6 | ||
185 | 20.2 | 25.0 | 17.3 | ||
240 | 22.6 | 27.2 | 22.5 |
5.4.3 Aluminium alloy strain clamp and insulation cover
NXL Series strain clamp (wedge type)is suitable for distribution wire up to 10kV,fixing the aerial insulation aluminium conductor or naked aluminium conductor on the rotate angle or insulator of terminal strain pole, and then fixing and tighting the aerial conductor ,insulation cover and strain clamp are used together. It’s action is insulation protection.
1.Withstand voltage: ≥18kV keep voltage one minute not break down
2.Insulation resistance: >1.0×1014Ω
3.Environments temperature: -30?~90?
4.Weather proof performance: have good performanced after 1008 hours artifical climate aging test.
Specification
type size |
section(mm2) |
Length (mm) |
Grip strength (kN) |
Failure load (kN) |
Insulation cover type | ||
with out coat | with coat | ?? | ??? | ||||
NXL-1 | 50 | - | 245 | 5.16 | 3.40 | 14.5 | NXL-95 |
70 | - | 7.12 | 4.60 | ||||
95 | - | 9.40 | 6.70 | ||||
NXL-2 | 120 | 35-70 | 255 | 12.70 | 8.90 | 23.4 | NXL-150 |
150 | 15.20 | 11.30 | |||||
NXL-3 | 185 | 70-120 | 300 | 18.50 | 13.60 | 36.3 | NXL240 |
240 | 23.60 | 17.30 | |||||
NXL-4 | 300-400 | 150-240 | 320 | 55.00 | 22.50 | 61.0 | - |
NXL-5 | - | 300-400 | 350 | 65.00 | 30.30 | 68.0 |
|
5.4.4 Strain clamp wedge type and insulation cover
NXT Series is suitable for the aerial insulation aluminium conductor, and then fixing and tighting the aerial conductor, insulation cover and strain clamp are used together. It’s action is insulation protection .The body made of high-intensity malleable iron, hot-dip galvanized.
Specification
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5.4.5Stram clamp and insulation cover
1.Skin the insulation material of wires with a length 5 cm more than that of wire clip, and hang C form parts and splitting wire on the main cable ,and then insert the wedge between the two wires with force .
2.Insert special bolt into the preset hole of C form parts ,where the bolt will be fixed into the threaded hole of wedge ,then screw the bolt on with a socket spanner until the first nut drops .
3.Use insulation tape to wrap the over-skimmed sections of clips and wires ,or protect the wire clips with clip covers .