Glass Standard Profile Suspension Insulators LXP-70 / U70BL
70 kN Standard Profile Glass Disc LXP-70 / U70BL
Catalogued as LXP-70 / U70BL, this is the 70 kN toughened glass disc on a 255 mm standard-profile shed with 320 mm creepage, 146 mm spacing and a 16 mm coupling. At about 3.5 kg it is the general purpose suspension disc for sub-transmission and heavy distribution lines in clean air, and it shares hardware with the 120 kN unit on the same shed.
Key Benefits
- 70 kN failing load with a 35 kN routine tension proof
- Shares the 255 mm shed and 16 mm coupling with the 120 kN disc
- 3.5 kg per unit for fast string assembly
- 100 kV dry lightning impulse withstand voltage
Technical Features
- 255 mm shed, 320 mm creepage, 146 mm spacing
- 16 mm ball and socket coupling
- 70 kV dry and 40 kV wet power-frequency withstand voltage
- 130 kV puncture withstand voltage
Published Figures for This Design
The values below are the catalogued figures for this type. Where a figure your specification needs is not listed, ask and we will confirm it in writing rather than estimate it.
| Diameter (D) | 255mm |
|---|---|
| Spacing (H) | 146mm |
| Creepage Distance | 320mm |
| Coupling Size | 16mm |
| Net Weight Each | 3.5kg |
| Mechanical Failing Load | 70kN |
|---|---|
| Tension Proof | 35kN |
| Dry Power-frequency Withstand Voltage | 70kV |
|---|---|
| Wet Power-frequency Withstand Voltage | 40kV |
| Dry Lightning Impulse Withstand Voltage | 100kV |
| Puncture Withstand Voltage | 130kV |
| Test Voltage RMS to Ground | 10kV |
|---|---|
| Maximum RIV at 1000 kHz | 50μV |
Application Scenarios
- 33 kV to 110 kV suspension strings in clean inland air
- Heavy distribution feeders with longer spans
- Line rebuilds replacing ageing porcelain discs
Who It Is For
- Distribution and sub-transmission utilities
- Line construction contractors
- Maintenance stores holding a general purpose disc
Problems It Solves
- Mixed disc types accumulating in maintenance stores
- Porcelain strings whose condition cannot be judged from the ground
- Over-specification of 120 kN discs on spans that need 70 kN
How This Design Differs From the Alternatives
Compared With LXP-120 / U120BL
Same shed, creepage and coupling at half the mechanical rating, so the two can share hardware and stores across a network.
Compared With LXHP-70 / U70BP fog profile
Same 70 kN rating but 320 mm creepage rather than 400 to 450 mm; the fog unit is the one for polluted sites.
Specifying and Installing This Unit
- Use the 35 kN proof value, not the 70 kN failing load, in the string calculation
- Match the 16 mm coupling against your existing ball eyes and socket clevises
- Keep one variant per string
- Replace any unit whose shell has shattered at the next patrol
Questions About This Product
Is U70B the same as U70BL?
The unit is catalogued as LXP-70 / U70BL. U70B is the short form used on the old listing for the same standard profile 70 kN disc.
Can we build a string mixing 70 kN and 120 kN units?
No. A string is rated by its weakest unit, so mixing ratings gives you a 70 kN string with 120 kN units wasted in it.
What creepage does this unit give?
320 mm per unit. Multiply by the unit count to get the string creepage and compare with your site requirement.
Do you supply the ball eyes and socket clevises?
We manufacture the insulators. Confirm your hardware model with us and we will check coupling compatibility against the drawing.
What documentation comes with an order?
Routine test records for the production lot ship with the goods. Type test reports are available on request before order placement.
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Request A Quote for Glass Standard Profile Suspension Insulators LXP-70 / U70BL
Send the quantity, the destination port and the standard you buy against. Routine test records ship with the goods and type test reports are available on request.