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Raychem High Voltage Booster Shed HVBS

Raychem

TE Connectivity’s (TE) Raychem high voltage booster shed (HVBS) protects against flashovers caused by heavy insulator wetting and ice build up.

Heavy wetting flashover may occur during live-line washing or torrential rain. A large volume of polluted water flowing down one side of an insulator can bridge much of the leakage distance. It occurs predominantly on large bushings and post insulators where the sheds are closely spaced and are all the same diameter.

Icing flashover occurs when there is heavy snow or ice build up on the insulator skirts. When the temperature starts to rise above freezing, the melting droplets start a stream of water that can induce a flashover.

The booster shed breaks up long cascades of lightly contaminated water. HVBS cools, compresses and extinguishes discharges which run between it and the porcelain insulator. It also acts as an arc-chute or expulsion tube to eject heavy current arcs from its underside.

Superior high-voltage outdoor materials are used in the Booster Shed design. The rugged, non-tracking, UV-resistant, high temperature polymer ensures long-term performance even in the most extreme environmental conditions.

Applications

Technical Specifications

Voltage Rating: Works on all voltage classes (designed to prevent icing and heavy wetting induced flashovers).

Application: High voltage booster shed designed for large bushings and post insulators to prevent flashovers caused by heavy rain, live-line washing, and ice/snow melt.

Material: Rugged, non-tracking, UV-resistant, high-temperature polymer.

Mechanical Strength: Tensile strength 17 MPa (2450 psi) | Ultimate elongation 25% min. (per ISO 37 & ASTM D638).

Electrical Strength: Dielectric strength > 150 kV/cm (380 V/mil) at 2.5 mm thickness (per ASTM D149) | Volume resistivity 1 x 10^13 Ohm-cm min. (per ASTM D257) | Tracking & erosion resistance: No tracking, erosion to top surface, or flame failure after step voltage testing up to 3.25 kV (per ASTM D2303).

Thermal & Environmental: Low temperature flexibility: No cracking after 4 hrs at -40°C (per ASTM D2671) | Accelerated ageing (168 hrs at 120°C): Tensile strength 17 MPa, Elongation 25% min..

Available Sizes & Range:

HVBS-615/155-01-M-BP: Insulator Core 94–114 mm (3.7–4.5 in) | Medium Outside Skirt 161 mm (6.3 in) | Installed Dia 569 mm (22.4 in)
HVBS-665/205-01-M-BP: Insulator Core 140–160 mm (5.5–6.3 in) | Medium Outside Skirt 216 mm (8.5 in) | Installed Dia 616 mm (24.3 in)
HVBS-684/225-01-M-BP: Insulator Core 159–178 mm (6.2–7.0 in) | Medium Outside Skirt 235 mm (9.3 in) | Installed Dia 634 mm (25.0 in)
HVBS-710/250-01-M-BP: Insulator Core 175–201 mm (6.9–7.9 in) | Medium Outside Skirt 249 mm (9.8 in) | Installed Dia 657 mm (25.9 in)
HVBS-740/280-01-M-BP: Insulator Core 199–229 mm (7.8–9.0 in) | Medium Outside Skirt 276 mm (10.9 in) | Installed Dia 685 mm (27.0 in)
HVBS-770/310-01-M-BP: Insulator Core 227–257 mm (8.9–10.1 in) | Medium Outside Skirt 304 mm (12.0 in) | Installed Dia 713 mm (28.1 in)

Standards & Compliance: REACH and RoHS compliant | ISO 37, ASTM D149, ASTM D257, ASTM D2303, ASTM D2671, ASTM D638 | Reports: UVR-8107, EDR-5311 | Instructions: PII 56080

Key Features

Raychem High Voltage Booster Shed HVBS

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