INSTALLATION INFORMATION

1912

1.

Install brackets to I beam or girder, weld or bolt on 2 m (6´ – 6´´)centers for L 20, A 20, C 20 Rails; 2.5 m (8´ – 3´´) centers for allother rails.Spacing between VAHLE Rails is 150 mm std. (6´´ ), min. 100 mm(4 ´´) for L 20, A 20, C 20 Rails; 150 mm std. (6´´), min. 120 mm (5´´) for all other Types.For high voltage installations: approx. 250 mm (10´´)Check alignment. Fig. A
Expansion diagram

2.

hand tight. Secure insulators/rail supports to brackets (in accordance with the mounting instructions – see pages 13–15) leaving bolts For general Arrangement see Fig. A.When placing the conductors into the insulators, make sure thatthe bayonett clamp (incorporated in most VAHLE insulators) sup-ports the rail sliding tight to allow for expansion and contraction.Do not change the position (don’t turn rail holders) when tighteningsupport bolts against steel brackets.

Expansion diagram

The chart shows orientation lines for the different conductorrails, considering 42 m expansion joint intervals.For gap setting move the orientation line in parallel up to thepoint presenting the anticipated max. ambient temperature.Then connect point of actual ambient temperature duringinstallation to the right until intersecting with the orientationline. Follow the vertical axis downward to read the air gapdimension in mm.

3.

Connect the VAHLE Rails by rigid- or expansion joints using the holes provided at the ends of the 7 m (23´) sections. For systems up to 100 m (330´) no expansion joints required. With longer runs use an expansion joint after every 6 standard lengths of 7 m (23´)intervals. For special heat environment and strong temperaturefluctuations reduce these intervals to 28 m (92´). For gap setting see adjacent diagram and example.Provide an extra insulator/Rail support close to each expansionjoint – approx. 250 mm. Example: Ambient temperature 25°CAir gap F-Rail= 19 mmAir gap C-Rail = 24 mmAir gap A-Rail= 33 mm

4.

Anchor VAHLE Rails for controlled sliding in both directions, byfitting two locating clamps close to the center insulator of the runor in the center between two expansion joints (see Fig. B + C). Fig. B

5.

Install feeder clamps at feed points. Bolt to web of rail and braiseto copperhead. Fig. C Symbols: Rigid JointExpansion JointInsulator Insulator with Locating Clamps

6.

Prepare Collector Bracket to suite normal working height and fixing studs of Current Collectors (See page 16 and 17) and install Collectors securely.

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