Selection Table for NLL Series Bolt Type Tension Clamp
☆ Product Usage
The NLL series bolt type aluminum alloy tension clamp is suitable for overhead lines of 20kV and below. It is used to secure aluminum stranded wires or steel core aluminum stranded wires under tension, and is used in conjunction with overhead insulated aluminum wires and insulation covers to provide insulation protection.
☆ Structural features
The clamp body is made of high-strength aluminum alloy
◆ Smooth appearance and long service life
◆ Easy to install and use
☆ Performance characteristics of insulation cover
1-10kV power frequency withstand voltage: ≥ 18kV withstand voltage for 1 minute without breakdown; 20kV power frequency withstand voltage: ≥ 30kV withstand voltage for 1 minute without breakdown
◆ Insulation resistance: ＞ 1.0 × 1014Ω
◆ Environmental temperature: -30 ℃ -90 ℃
◆ Climate resistance: Good performance after 1008 hours of artificial climate aging test
☆ Specifications and technical parameters 
model | Main dimensions | Adapt to wire diameter (including wrapping materials) | Nominal failure load (kN) | |
M | C | |||
NLL-1 | 16 | 18 | 8.0-12.0 | 60 |
NLL-2 | 16 | 18 | 12.0-16.0 | 60 |
NLL-3 | 16 | 27 | 16.0-18.0 | 80 |
NLL-4 | 18 | 30 | 18.0-22.5 | 80 |
NLL-5L | 18 | 36 | 22.5-26.0 | 90 |
NLL-5 | 18 | 36 | 22.5-29.0 | 90 |
NLL-6 | 22 | 42 | 26.0-32.7 | 120 |
