Glass Fog Profile Suspension Insulators U160BP/170
160 kN Fog Disc on a 280 mm Shed With 20 mm Coupling
U160BP/170 is a 160 kN toughened glass fog disc on a 280 mm shed, with 450 mm of creepage and a 170 mm unit spacing. The smaller shed diameter keeps swing clearance and wind load down on narrow tower windows, while the 20 mm coupling carries the higher string load. Net weight is approximately 7.2 kg.
Key Benefits
- 160 kN failing load on a compact 280 mm shed
- 450 mm creepage handles moderate pollution without a full fog-class shed
- 20 mm ball and socket coupling for higher-load strings
- Lower wind area than a 320 mm fog disc at the same strength
Technical Features
- 280 mm shed diameter, 170 mm spacing
- 85 kV dry and 50 kV wet power-frequency withstand voltage
- 125 kV dry lightning impulse 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) | 280mm |
|---|---|
| Spacing (H) | 170mm |
| Creepage Distance | 450mm |
| Coupling Size | 20mm |
| Net Weight Each | 7.2kg |
| Mechanical Failing Load | 160kN |
|---|---|
| Tension Proof | 80kN |
| Dry Power-frequency Withstand Voltage | 85kV |
|---|---|
| Wet Power-frequency Withstand Voltage | 50 kV |
| Dry Lightning Impulse Withstand Voltage | 125 kV |
| Puncture Withstand Voltage | 130kV |
| Test Voltage RMS to Ground | 10kV |
|---|---|
| Maximum RIV at 1000 kHz | 50μV |
Application Scenarios
- Sub-transmission lines in mixed agricultural and industrial corridors
- Tower designs with a narrow insulator window
- High-wind corridors where string swing governs the design
Who It Is For
- Line designers balancing creepage against conductor swing
- Contractors standardising on a single 20 mm coupling across a project
- Utilities replacing 160 kN porcelain discs on existing towers
Problems It Solves
- Swing clearance failures caused by oversized fog discs
- Strings that need 160 kN capability but not full salt-fog creepage
- Mixed coupling sizes across a line that complicate spare part stocking
How This Design Differs From the Alternatives
Compared With U160BP / 155
Smaller 280 mm shed and 450 mm creepage instead of 320 mm and 550 mm, chosen when swing clearance matters more than leakage distance.
Compared With LXHP-120 / U120BP
Same 280 mm shed and 450 mm creepage, but 160 kN instead of 120 kN and a 20 mm rather than 16 mm coupling.
Specifying and Installing This Unit
- Check the swing angle and tower window before selecting shed diameter
- Verify your yoke plates and ball eyes take a 20 mm coupling
- Apply the 80 kN tension proof value as the routine working check
- Replace any unit whose shell has shattered at the next available outage
Questions About This Product
Why is the coupling 20 mm when the disc is the same size as a 120 kN unit?
Coupling size follows the mechanical rating, not the shed. At 160 kN the string load requires the 20 mm ball and socket, even though the 280 mm shed matches the 120 kN fog unit.
Can we mix this with 16 mm coupling units in one string?
No. A string must use one coupling designation throughout. Mixing sizes requires an adapter fitting, which becomes the weakest element.
What pollution level does 450 mm of creepage cover?
It depends on your specific creepage requirement in mm per kV. The 450 mm figure lets you complete that calculation against IEC 60815 or your own utility standard.
How are the units packed for export?
Units ship stacked and separated on pallets. Exact carton and pallet configuration is confirmed at order stage against your destination and handling equipment.
Do you supply matched hardware for the string?
We manufacture the insulators. Tell us the hardware you intend to use and we will confirm coupling compatibility against the drawing.
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Request A Quote for Glass Fog Profile Suspension Insulators U160BP/170
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.