AOC 15 user manual Tower and Wind Turbine Generator Installation

6.0 Tower and Wind Turbine Generator Installation 39

CAUTION

THE BLADES SHOULD NOT BE SCRATCHED OR GOUGED

DURING SITE HANDLING AS THIS CAN CAUSE A LOSS OF

ROTOR PERFORMANCE AND/OR BLADE DEGRADATION

FROM ENVIRONMENTAL EFFECTS.

The string in the conduit should be used to pull a #10 gage wire through the conduit. The blade cable should then be attached to the wire (with tape, for example) and pulled through the blade conduit, with the molded 3-pin connector at the root end of the blade. Lubricating the blade cable facilitates this operation. Female connectors should be crimped to the black and red wires and a fork-tongue connector to the blue wire. The female connectors should be connected to the rectifier and the fork-tongue connector to the ground point on the damper bracket (see Figure 6- 2).

To avoid damaging the tip brakes during blade installation, it is preferable to install them once the blades have been attached to the hub. Till then, the blade ends should be protected with foam to prevent damage, should they strike the ground or any hard object.

After connecting the electromagnet, the tip brake assembly should be inserted carefully into the end of the blade without pinching the electromagnet wires. Each tip brake should be bolted to its blade using low profile nylon-insert lock nuts over the blade end studs. The lock nuts should be torqued to 14.8 Nm (11 ft-lbs) for the 5/16" studs and 24 Nm (18 ft-lbs) for the 3/8" studs, using ½" and 9/16" socket wrenches, respectively. It is recommended to step torque each nut to distribute the force over all studs.

CAUTION

FORCING THE TIP BRAKE INTO THE BLADE CAVITY CAN

DAMAGE BOTH THE BLADE AND THE TIP BRAKE. TIP

BRAKES SHOULD SLIDE INTO THE BLADE CAVITY

EASILY.

After the tip brake has been mounted on the blade and wired, the blade should be positioned so that the tip brake can open and close freely. The tip brake should be opened and let go; it should close completely.

NOTICE: Use of the material contained in this document is subject to the warning on page Iv and the disclaimer on page v of this document.

DOC012R02 AOC 15/50 User Manual Nov 2001