VSE™ Anode
Impressed Current Cathodic Protection System for Wind Turbines
General Info
The VSE Anode system is designed to allow optimal operation of Mixed Metal Oxide activated titanium anode elements in saline mud, sand or silt burial conditions. This is achieved by providing a natural water envelope around the anode elements. Current is discharged from the underside of the anode sled. This type of anode material, as with all other types of impressed current anode, does not work predictably in saline mud exposure. The sled is designed to operate in harsh environments. Artificial frond arrays along the sides of the sled are designed to encourage self-burying, and a sacrificial steel plate is attached to the bottom to prevent damage to the screen during installation. This plate will corrode away within 2 years of installation, by which time the sled will be settled in place.
Anode elements are titanium tubes with triple coated MMO coating.
| Titanium Substrate | ASTM 338 Gr. 2 - 1.25” Tube 0.035” WT 48” Long |
|---|---|
| Two tubes used 1 @ 48 “ and 1@ 42” | |
| Coating | IrO2/Ta2O5 - Tri-Coat Mixed Metal Oxide |
| Center Connection | Internal tin compression connector, resistance ≤ 0.001 Ohm. |
| Sealed with proprietary resins, tested for integrity with helium gas. | |
| Interconnect | Cable #2 AWG Exane Insulated Flexible Locomotive Cable, with Teflon over sheath. |
Main Supply Cable - 600/1000V rated for direct burial.
| Conductor | 37 / 2.03 mm plain annealed copper 120 mm2 |
|---|---|
| Insulation | HMWPE 2.5 mm RT 19.4 mm OD |
| Bedding | PVC Type 9 1.2 mm RT 22.1 mm OD |
| Armor | 1.6 mm Galvanized Steel Wire |
| 1st Layer | LHL 42 Wires |
| 2nd Layer | RHL 47 Wires |
| Outer Sheath | HMWPE 1.2 mm RT 31.3 mm OD |
| Extra Abrasion Sheath | Steel reinforced rubber hose to 50.0 mm OD (First 16 Meters Only) |
| Resistance @ 20°C | 0.151 Ohm / 1000 M |
| Minimum Bend Radius | 450 mm |
| Anode Tether | 20 mm Wire Rope Dry Galvanized with hot dip galvanized clips and thimbles. |
| Bend Stiffener | Steel reinforced heavy-duty rubber. |
Anode Vault
| Material | ASTM A36 Steel – Welded Construction |
|---|---|
| Coating: Seawater Envelope | Teflon loaded Vinyl Ester, One Coat 35-45 mils DFT |
| Coating: Surface Prep. | SSPC SP5 or NACE 1 White Metal, Anchor Profile 4 mils minimum. |
| Coating:Rest of Vault (internal) | Bare Steel / Zinc Anodes |
| Coating: Vault External | Shop Primer / Zinc Anodes |
| Cathodic Protection | 2 x 48lb and 2 x 24lb Zinc Hull Anodes External, 2 x 24lb Zinc Hull Anodes Internal |
| Vault Primary Shield | Teflon Faced CPVC Composite. |
| Anti-Scour Fronds | Nylon 17” 63 Fronds / sq.ft. |
| Filters: Footprint | 96” x 41” x 3” Vinyl Ester Grating with 12 oz Polypropylene Felt Filter. |
| Filters: Gas Vent | 96” x 5” x 1.5” Vinyl Ester Grating with 12 oz Teflon Felt Filter. |
| Sacrificial Base Plate | ASTM A36 Steel Plate 40” x 96” x 0.25” |
| Side Ballast | 80 lb Concrete |
Overall Dimensions
| Length | 118” (2997 mm) |
|---|---|
| Width | 60” (1524 mm) |
| Height | 18” (457 mm) Excluding Anchor Feet |
| Height | 30” (762 mm) With Anchor feet |
| Weight: VSE Sled | 1500 lb (680 Kg) Without Cable |
| Weight: Main Power Cable | Approx 2 lb (0.9 Kg) per foot |
| Weight: Shark Hose main, Power cable protector | 0.6 lb (0.27 Kg) per foot |
| Weight: Shark Hose main, Ballast Cement | 160 lb (72.5 Kg) |