Double umbrella disk Suspension Insulators UG70B146/450D 16R
70 kN Double Umbrella Disc for Dust and Dew Conditions
UG70B146/450D 16R is the 70 kN member of the double umbrella glass family: a 280 mm shed with two stacked skirts, 450 mm creepage, 146 mm spacing and a 16 mm coupling. It covers sub-transmission and heavy distribution lines in the same dusty environments where the 120 kN unit is used on the transmission sections, letting one contamination strategy run across a whole network. Net weight is around 6.3 kg.
Key Benefits
- Same contamination geometry as the 120 kN unit at a 70 kN rating
- 450 mm creepage on a 146 mm spacing and 16 mm coupling
- 35 kN routine tension proof for light and medium spans
- 120 kV dry lightning impulse withstand voltage
Technical Features
- 280 mm double umbrella shed, 146 mm spacing, 450 mm creepage
- 80 kV dry and 45 kV wet power-frequency withstand voltage
- 16 mm ball and socket coupling
- 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) | 146mm |
| Creepage Distance | 450mm |
| Coupling Size | 16mm |
| Net Weight Each | 6.3kg |
| Mechanical Failing Load | 70kN |
|---|---|
| Tension Proof | 35kN |
| Dry Power-frequency Withstand Voltage | 80kV |
|---|---|
| Wet Power-frequency Withstand Voltage | 45kV |
| Dry Lightning Impulse Withstand Voltage | 120kV |
| Puncture Withstand Voltage | 130kV |
| Test Voltage RMS to Ground | 10kV |
|---|---|
| Maximum RIV at 1000 kHz | 50μV |
Application Scenarios
- Sub-transmission lines feeding mine and quarry sites
- Distribution feeders in arid regions with seasonal dust
- Networks standardising one shed profile across voltage levels
Who It Is For
- Utilities running one contamination policy across a network
- Industrial plant operators maintaining their own feeders
- Contractors upgrading feeders in dusty corridors
Problems It Solves
- Feeder outages after dew settles on dust-covered strings
- Two different shed profiles in one network complicating maintenance
- Frequent washing of lines that are hard to access
How This Design Differs From the Alternatives
Compared With UG120B146/450D 16R
Identical shed, creepage, spacing and coupling at 70 kN instead of 120 kN, so the two can share hardware and stores.
Compared With LXP-70 / U70BL standard profile
Same 70 kN rating but 450 mm creepage with a contamination-resistant shed, instead of 320 mm on a plain profile.
Specifying and Installing This Unit
- Use the 35 kN proof value in the string load calculation
- Keep the same profile through a string and ideally through a feeder
- Inspect after the first dew of the dry season, when contamination flashover is most likely
- Handle by the cap and store upright
Questions About This Product
Can this replace a fog profile unit one for one?
If the existing unit is a 70 kN, 146 mm spacing, 16 mm coupling disc with 450 mm creepage, the geometry matches. Confirm the coupling and spacing against your drawing first.
Why does a 70 kN unit weigh the same as the 120 kN version?
Both are approximately 6.3 kg because the shed geometry and glass volume are the same. The difference is in the cap, pin and cement system that carries the mechanical load.
Is the double umbrella harder to wash?
No. The two skirts are open to a wash spray. The point of the geometry is that it holds its leakage path longer between washes.
What standards does this design follow?
It is produced to the GB and IEC disc insulator designations shown in the type reference. State the standard you buy against and we will quote to it.
How is it packed?
Units are stacked and separated on pallets for export. The exact configuration is confirmed at order stage.
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Request A Quote for Double umbrella disk Suspension Insulators UG70B146/450D 16R
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.