Warning Spheres, Ø 600 mm aircraft warning marker spheres for overhead line conductors and earth wires of any voltage
The warning spheres of the manufacturer with a diameter of 600 mm make the conductors and overhead earth wires of overhead lines clearly visible to low-flying aircraft and helicopters. The markers comply with ICAO recommendations on obstacle marking and are suitable for lines of any voltage without changing the clearances. The catalogue programme covers conductors with a diameter from 9.3 to 54.8 mm.
- Sphere diameter
- 600 mm
- Hemisphere material
- painted polyethylene, UV and ozone resistant
- Colours
- red, orange, white; red-white, orange-white
- Conductor diameter
- 9.3–54.8 mm
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
According to the manufacturer, the company has developed warning spheres since 1964 and works to make the colour of the markers fade slowly. The spheres are installed near airports and on high spans over rivers, lakes, fjords, valleys, roads, railways, construction sites and pipelines. They are also mounted next to military facilities, police stations, hospitals, on helicopter routes and in other low-flying zones. The markers are fixed on the top conductors, earth wires or on the tops of towers. The task of the marker is simple: it must show the pilot of a low-flying aircraft or helicopter in good time where the conductor runs.
The marker consists of two hemispheres held on the conductor by two bolted clamps. The hemispheres are made of painted polyethylene resistant to ultraviolet and ozone. A special fixing mechanism allows one lineman to install the sphere easily. The clamp is designed so that the material is not deformed when the bolts are tightened, and a stainless steel locking plate prevents the clamp from loosening. The rigidity of the sphere is high, so the hemispheres do not rattle, make no noise and suffer no fatigue damage from vibration over the whole service life of the conductor.
The clamp jaws are made of aluminium alloy with a grooved channel, so the sphere does not slip along the conductor. The plates and screws are of hot-dip galvanised steel. Drain holes prevent rainwater and condensate from accumulating inside. The hemispheres nest into each other, which reduces transport and storage costs. The programme covers conductors from 9.3 to 54.8 mm in steps of 1.3 mm. For aluminium conductors and OPGW cables the manufacturer recommends fitting the spheres over protective spiral rods. Stainless steel bolts are supplied as an option.
The spheres are painted red, orange or white, and there are also two-colour red-white and orange-white versions. The colour is chosen to contrast with the natural background. Where the background changes with the seasons, two-colour spheres are used, or white spheres alternate with orange or red ones, and the line remains visible from the air all year round.
Technical specifications
| Sphere diameter | 600 mm |
|---|---|
| Hemisphere material | painted polyethylene, UV and ozone resistant |
| Colours | red, orange, white; red-white, orange-white |
| Conductor diameter | 9.3–54.8 mm |
| Clamps | aluminium alloy with grooved channel |
| Fixings | hot-dip galvanised steel; locking plate: stainless steel |
| Requirements | ICAO recommendations on obstacle marking |
| Option | S for stainless steel bolts |
Request a price and lead time
Warning Spheres, Ø 600 mm aircraft warning marker spheres for overhead line conductors and earth wires of any voltage. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 3926 90 97 90 |
|---|---|
| HS, 6 digits | 3926 90 |
| CN (EU) | 3926 90 97 |
| HTSUS (USA) | 3926 90 99 89 |
| China customs tariff | 3926 90 90 90 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
Do the clearances have to be changed after the spheres are installed?
No, the spheres are suitable for transmission and distribution lines of any voltage without changing the clearances.
What conductor diameters are the warning spheres designed for?
The catalogue programme covers conductors from 9.3 to 54.8 mm in steps of 1.3 mm. For aluminium conductors and OPGW it is recommended to fit the spheres over protective spiral rods.
What requirements do the warning spheres comply with?
The spheres of 600 mm diameter comply with ICAO recommendations on obstacle marking. They are supplied in red, orange and white and in two-colour versions.
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