The following information is intended as a set of checklists to assist our customers in addressing the relevant details of an installation in logical sequences. Although most items apply to both large and small projects not every item will apply to every project. To insure thorough planning it is very important that the customer understand why a particular detail is or is not appropriate to the installation.

By reviewing the entire list at various stages of the project, the customer should be able to ensure that he/she has not overlooked any of the details necessary to complete a project

Siting Fact

Site selection may have a significant effect on annual energy production. It is typically worth the additional time and effort to locate the proper site to maximize energy production and maintain the wind turbine expected life. The following siting factors should be considered:

• Wind Resource Characteristics;
• Average wind speed;
• Makeup of average (frequency and duration of power producing winds);
• Prevailing wind direction (s);
• Turbulence;
• Peak windspeed;
• Height and location of obstructions;
• Distance from utility service point;
• Local restrictions relative to height, proximity to boundaries, etc. ;
• Tower height;
• Proximity of wind turbines to each other;
• Site accessibility and its effect on construction and maintenance costs;

Utility Factors

The EW15 includes an induction generator which requires the interfacing electrical system to provide generator excitation. Each Turbine includes a fixed set of power factor correction capacitors located within the dynamic brake capacitor box. The turbine installation must consider specific factors regarding the interfacing utility network to provide for a safe and efficient installation. The following utility related factors should be considered:

• Buy back rates, contract options, green pricing, and net billing;
• Available line capacity (in kVA);
• Available fault current;
• Voltage and phase configuration of the primary circuit and the local utility line;
• Distance to nearest substation;
• Size and winding configuration of the step down transformer required at the site (in kVA);
• Line protection required;
• Cogeneration standards for small power producers;
• Interconnection hardware and wiring standards;
• System operation requirements:
  • Voltage regulation;
  • Power factor;
  • Protective devices;
  • Utility/Wind turbine interface responsibilities;
• To properly interface with the utility network the customer needs to identify any and all power factor correction capacitors or unique loads connected to the utility system;
• To assist EWIS in designing your interface , EWIS needs the attached "Required Customer Power Grid Information" sheet to be completed;

Permit and Approval

Many wind turbine locations will require some of the permits and approvals identified herein. It is important to determine which permits / approvals apply to your particular site.

• Issued by:
  • Municipality or local council;
  • Country;
  • State or Province;
  • Federal (FAA, FCC, etc.);
  • Commission (energy, conservation, historic, etc.);
  • Utility;
• Type:
  • Construction;
  • Foundation Engineering;
  • Electrical;
  • Interconnection;
  • Zoning;
  • Communication Interference;
  • Aviation Interference;
  • Enviromental Impact;
• Inspections required for above

Plans and Drawings

Suggested items to have on hand or to prepare for efficient and proper site development and for the submittal, if necessary, for various approvals:

• Plot plan;
• Site layout;
• Tower foundation drawing;
• Tower assembly drawing;
• Site wiring layout;
• Control house interior wiring (if applicable) diagram;
• Control house physical layout (if applicable);
• Utility interface - single line drawing;
• Utility interface - three line drawing;
• Wind turbine generator to control box wiring schematic;
• Wind turbine generator wiring diagram;

Construction Planning Considerations

To minimize time and cost, the following items should be considered in the planning process:

• Subcontractor roles and responsibilities;
• Cable trenches (type, length and depth);
• Control enclosure design;
• Site specific weather extremes;
• Tower foundation type;
• Foundation forming details;
• Site accessibility and road conditions;
• Crane availability and cost;
• Concrete availability and cost;
• Backhoe availability and cost;
• Concrete Reinforcing Bar availability and cost;
• Labor skills and related costs;
• Soil Characteristics
  • Soil stability;
  • Depth to water table;
  • Depth to significant frost;
  • Allowable bearing capacities;
• Blasting needs;
• Tripod or backhoe for tower assembly;
• Availability of hand tools;
• Concrete working tools;
• Anchor bolt template and verification of proper placement;
• Fencing materials and security;

Electrical planning considerations

Your local wiring inspector should review the design of the electrical installation prior to commencing work at the site. The following items should be considered in the design / installation of the electrical system :

Anenometer Booms Photo courtesy KEA

Wire sizes, length, and type as described in Section 1.7 and Appendix B; Conduit type and size; Service entrance hardware; Revenue meter specifications; Protective hardware required by the interfacing utility; Distribution panel(s) with properly sized circuit protection; Single phase power for control house lights and receptacles; Step down transformer characteristics; Control house interior wireways; Control house junction box (es); Multiple unit control for wind power stations; Twist cable termination box; Foundation / conduit interfaces;

WARNING:
THE INSTALLATION OF A LARGE SIZE WIND TURBINE GENERATOR (SUCH AS THE EW15) REQUIRES SPECIALIZED SKILLS, EQUIPMENT AND EXPERIENCE. INFORMATION SUPPLIED BY ATLANTIC ORIENT CORPORATION AND ITS SUPPLIERS ASSUMES THAT PERSONNEL WILL HAVE THE REQUIRED SKILLS, EXPERIENCE, AND EQUIPMENT TO INSTALL AND/OR MAINTAIN ALL PRODUCTS. NO ONE SHOULD ATTEMPT TO CLIMB TOWERS, OPERATE, OR MAINTAIN WIND TURBINES WITHOUT THE NECESSARY SKILLS, EXPERIENCE, TOOLS, AND SAFETY EQUIPMENT.

ATLANTIC ORIENT CORPORATION ASSUMES NO DIRECT OR CONSEQUENTIAL LIABILITY IF FAULTY OR DANGEROUS INSTALLATION OR MAINTENANCE PRACTICES ARE USED. THERE ARE TRAINED AND EXPERIENCED PERSONNEL AVAILABLE TO ASSIST IN INSTALLATION, OPERATION, MAINTENANCE, AND TROUBLE SHOOTING. CONTACT ATLANTIC ORIENT CORPORATION OR ITS AUTHORIZED REPRESENTATIVE IF CONSULTATION OR ASSISTANCE IS REQUIRED.

ATLANTIC ORIENT CORPORATION AND ITS SUPPLIERS RECOMMEND RESTRICTED ACCESS, ANTI-CLIMB SECTIONS, OR FENCES FOR ALL TOWERS TO PREVENT UNAUTHORIZED PERSONS FROM CLIMBING THE TOWER. APPROPRIATE WARNING SIGNS SHOULD ALSO BE PLACED ON THE TOWER.

TOWERS SHOULD NOT BE INSTALLED NEAR UNPROTECTED POWER LINES. ALL ELECTRIC WIRES AND CABLES SHOULD BE CONSIDERED DANGEROUS.

For best performance, all wind turbine installations should be thoroughly inspected by qualified personnel within 60 days after completion, at least semi-annually, and after any major windstorm, earthquake or other severe event.

The inspection and service intervals identified by Atlantic Orient Corporation must be followed for any Atlantic Orient warranty to remain valid.