APPENDIX D – INTERCONNECTION STANDARDS FOR DISTRIBUTIVE GENERATION AND OPERATION OF CUSTOMER-OWNED ELECTRIC GENERATING FACILITIESAPPENDIX D – INTERCONNECTION STANDARDS FOR DISTRIBUTIVE GENERATION AND OPERATION OF CUSTOMER-OWNED ELECTRIC GENERATING FACILITIES\Technical Requirements

1.            CHARACTER OF SERVICE:

The electrical service shall be 60 cycles per second alternating current (AC) at supply voltages and number of phases that apply under the City's rate schedules.

2.            CODE REQUIREMENTS:

The Generating Facility shall meet all requirements established by the National Electrical Code (NEC), National Electrical Safety Code (NESC), Institute of Electrical and Electronics Engineers (IEEE), and Underwriters Laboratories (UL). Specific codes are listed on the attached document entitled “National Certification Codes and Standards”.

Every person who desires to install a wind energy conversion system (WECS) shall be required to secure a permit from the office of the City Clerk. The application for such permit shall contain the information and comply with all regulations listed in this document.

a.    Within the city limits of Girard, the minimum from all zoning lot lines to any tower, poles, or other support base of the WECS shall be determined by using the following matrix:

Rotor Diameter (Ft)

Setback Distance (Ft)

5

100

10

165

15

220

20

270

25

310

30

340

35

365

40

385

       Intermediate rotor size distances will be interpolated. The WECS shall not be located in any required yard. WECS location considered for outside of Girard city limits but is serviced by the City of Girard electric utility will be approved on a case by case basis.

b.    The WECS shall not cause interference to microwave communications or radio and television reception in the area. Noise levels measured at the plot line shall not exceed 60dBA in a residential zone.

c.    To limit climbing access to a WECS tower, or other support structure, a six (6) foot high fence with locking portal shall be placed around the WECS support or if a tower is utilized, the tower climbing apparatus shall be limited to no lower than twelve (12) feet from the ground or the WECS support may be mounted on a roof top.

d.    All blades of a WECS shall be constructed of non-metallic substances. If the applicant can prove, in writing, that no electromagnetic interference will result, a metal content of up to 25% will be acceptable.

e.    Certification by a licensed professional structural engineer that the technical and dimensional data included in the application is accurate; the proposed WECS is structurally adequate to withstand foreseeable natural phenomena; that the tower and top adapter will withstand minimum horizontal thrusts of 900 pounds; and conforms to the requirements set forth in this section.

f.     Height of the WECS shall not exceed the maximum height restriction in the zone where it is located by more than 20 feet. The height of the WECS shall be measured at the center of the blade diameter.

g.    Certification will be required from the Rocky Flats Plant Energy Systems Group, Golden, Colorado, that has tested the proposed WECS, together with the resulting data pertaining to the operation, safety, noise, and potential interference with television, radio or communication reception by the proposed WECS.

h.    The WECS, if interconnected to a utility system, shall meet the requirements for interconnection and operation as set forth in the electric utility's current service regulations applicable to WECS.

i.     A plot plan shall be submitted with the application for the building permit showing the proposed location and dimensions of the WECS, guy wires, or other support, fencing and all other existing buildings within 200 feet of the boundaries of the exterior lines.

j.     A list of all property owners within 200 feet of the boundaries of the site upon which the WECS is proposed to be installed shall accompany all other required documents.

k.    No WECS shall be located near to an existing WECS closer than a distance equal to five times the diameter of the larger rotor. This distance may be reduced upon proof demonstrating that such a reduction in distance will not adversely affect the operation of the other WECS.

l.     Maintenance of any WECS shall be performed in accordance with the manufacturers' recommendations. Rotor blades shall be checked for fatigue annually by a licensed structural engineer who shall certify the results of such inspection to the city Codes Enforcement Official within ten days of inspection.

m.   The applicant shall provide a certificate of liability insurance. Annually the owner/operator shall present evidence to the Zoning Administrator that the liability insurance is still effect.

n.    Any WECS which thereafter becomes inoperable or fails to conform to the requirements specified in this document shall be repaired or removed within one year of the inoperable date.

3.            GENERATING FACILITY PARAMETERS:

The control system of the Generating Facility shall comply with the IEEE specifications and standards for parallel operation with the City, and in particular as follows:

a.    Power output control system shall automatically disconnect from City source upon loss of City voltage and not reconnect until City voltage has been restored by the City.

b.    Power output control system shall automatically disconnect from City source if City voltage fluctuates beyond plus or minus 10% (ten percent).

c.    Power output control system shall automatically disconnect from City if frequency fluctuates plus or minus 2 cycles (Hertz).

d.    Inverter output distortion shall meet IEEE requirements.

e.    The Generating Facility shall meet the applicable IEEE standards concerning impacts to the Distribution System with regard to harmonic distortion, voltage flicker, power factor, direct current injection and electromagnetic interference.

4.            FAULT CURRENT CONTRIBUTION

The Generating Facility shall be equipped with protective equipment designed to automatically disconnect during fault current conditions and remain disconnected until the voltage and frequency have stabilized.

5.            RECLOSING COORDINATION

The Generating Facility shall be coordinated with the Distribution System reclosing devices by disconnecting from the system during the initial de-energized operation and shall remain disconnected until the voltage and frequency have stabilized.

6.            DISCONNECT DEVICE:

A safety disconnect switch shall be installed that is visible to and readily accessible by City personnel. The switch shall be capable of being locked in the open position and shall prevent the generator from supplying power to the distribution system. It shall be clearly marked “Safety Disconnect Switch.”