TITLE 83: PUBLIC UTILITIES
CHAPTER I: ILLINOIS COMMERCE COMMISSION
SUBCHAPTER c: ELECTRIC UTILITIES
PART 466 ELECTRIC INTERCONNECTION OF DISTRIBUTED GENERATION FACILITIES
SECTION 466.30 DEFINITIONS


 

Section 466.30  Definitions

 

Terms defined in Section 16-102 of the Public Utilities Act (Act) [220 ILCS 5/16-102] shall have the same meaning for purposes of this part as they have under Section 16-102 of the Act, unless further defined in this Part.  The following words and terms, when used in this Part, have the following meanings unless the context indicates otherwise:

 

"Adverse system impact" means a negative effect that compromises the safety or reliability of the electric distribution system or materially affects the quality of electric service provided by the electric distribution company (EDC) to other customers.

 

"Affected system" means an electric system not owned or operated by the electric distribution company reviewing the interconnection request that could suffer an adverse system impact from the proposed interconnection.

 

"Applicant" means a person (or entity) who has submitted an interconnection request to interconnect a distributed generation facility to an EDC's electric distribution system.

 

"Area network" means a type of electric distribution system served by multiple transformers interconnected in an electrical network circuit, generally used in large, densely populated metropolitan areas.

 

"Business day" means Monday through Friday, excluding State and federal holidays.

 

"Calendar day" means any day, including Saturdays, Sundays and State and federal holidays.

 

"Certificate of completion" means a certificate, in a form approved by the Commission, that contains information about the interconnection equipment to be used, its installation and local inspections (see Appendix B).

 

"Commissioning test" means tests applied to a distributed generation facility by the applicant after construction is completed to verify that the facility does not create adverse system impacts and performs to the submitted specifications.  At a minimum, the scope of the commissioning tests performed shall include the commissioning test specified in Institute of Electrical and Electronics Engineers, Inc. (IEEE) Standard 1547 Section 5.4 "Commissioning tests".

 

"Distributed generation facility" means the equipment used by an interconnection customer to generate or store electricity that operates in parallel with the electric distribution system.  A distributed generation facility typically includes an electric generator, a prime mover, and the interconnection equipment required to safely interconnect with the electric distribution system or local electric power system.

 

"Distribution upgrade" means a required addition or modification to the electric distribution system to accommodate the interconnection of the distributed generation facility.  Distribution upgrades do not include interconnection facilities.

 

"Draw-out type circuit breaker" means a switching device capable of making, carrying and breaking currents under normal and abnormal circuit conditions such as those of a short circuit.  A draw-out circuit breaker can be physically removed from its enclosure creating a visible break in the circuit.  The draw-out circuit breaker shall be capable of being locked in the open, drawn-out position.

 

"Electric distribution company" (EDC) means any electric utility subject to the jurisdiction of the Commission.

 

"Electric distribution system" means the facilities and equipment owned and operated by the EDC and used to transmit electricity to ultimate usage points such as homes and industries from interchanges with higher voltage transmission networks that transport bulk power over longer distances.  The voltage levels at which electric distribution systems operate differ among areas, but generally operate at less than 100 kilovolts (kV) of electricity.  "Electric distribution system" has the same meaning as the term "Area EPS," as defined in Section 3.1.6.1 of IEEE Standard 1547.

 

"Fault current" is the electrical current that flows through a circuit during an electrical fault condition.  A fault condition occurs when one or more electrical conductors contact ground or each other.  Types of faults include phase to ground, double-phase to ground, three-phase to ground, phase-to-phase, and three-phase.  Often, a fault current is several times larger in magnitude than the current that normally flows through a circuit.

 

"IEEE" is the Institute of Electrical and Electronics Engineers, Inc., 3 Park Avenue, New York NY 10016-5997 (http://www.ieee.org).

 

"IEEE Standard 519-2014" is the IEEE Standard 519-2014 (2014) "IEEE Recommended Practice and Requirements for Harmonic Control in Electric Power Systems". This incorporation does not include any later amendments or editions.

 

"IEEE Standard 1547" is the IEEE Standard 1547 (2003) "Standard for Interconnecting Distributed Resources with Electric Power Systems".  This incorporation does not include any later amendments or editions.

 

"IEEE Standard 1547.1" is the IEEE Standard 1547.1 (2005) "Conformance Test Procedures for Equipment Interconnecting Distributed Resources with Electric Power Systems."  This incorporation does not include any later amendments or editions.

 

"Interconnection customer" means a person or entity that interconnects a distributed generation facility to an electric distribution system.

 

"Interconnection equipment" means a group of components or an integrated system owned and operated by the interconnection customer that connects an electric generator with a local electric power system, as that term is defined in Section 3.1.6.2 of IEEE Standard 1547, or with the electric distribution system.  Interconnection equipment is all interface equipment including switchgear, protective devices, inverters or other interface devices.  Interconnection equipment may be installed as part of an integrated equipment package that includes a generator or other electric source.

 

"Interconnection facilities" means facilities and equipment required by the EDC to accommodate the interconnection of a distributed generation facility.  Collectively, interconnection facilities include all facilities and equipment between the distributed generation facility's interconnection equipment and the point of interconnection, including any modifications, additions, or upgrades necessary to physically and electrically interconnect the distributed generation facility to the electric distribution system.  Interconnection facilities are sole use facilities and do not include distribution upgrades.

 

"Interconnection request" means an applicant's request, in a form approved by the Commission, for interconnection of a new distributed generation facility or to change the capacity or other operating characteristics of an existing distributed generation facility already interconnected with the electric distribution system.

 

"Interconnection study" is any study described in Section 466.120.

 

"Lab-certified" means a designation that the interconnection equipment meets the requirements set forth in Section 466.70.

 

"Line section" is that portion of an electric distribution system connected to an interconnection customer's site, bounded by automatic sectionalizing devices and/or the end of the distribution line.

 

"Local electric power system" means facilities that deliver electric power to a load that is contained entirely within a single premises or group of premises.  Local electric power system has the same meaning as that term has as defined in Section 3.1.6.2 of IEEE Standard 1547.

 

"Minor system modifications" means modifications to an EDC's Electric Distribution System located between the service tap on the distribution circuit and the meter serving the Interconnection Customer or other minor system changes that the EDC estimates will entail less than four hours of work and $1000 in materials.

 

"Nameplate capacity" is the maximum rated output of a generator, prime mover, or other electric power production equipment under specific conditions designated by the manufacturer and usually indicated on a nameplate physically attached to the power production equipment.

 

"Nationally recognized testing laboratory" or "NRTL" means a qualified private organization that meets the requirements of the Occupational Safety and Health Administration's (OSHA) regulations.  See 29 CFR 1910.7. (February 25, 2011).  This incorporation does not include any later amendments or editions.  NRTLs perform independent safety testing and product certification.  Each NRTL shall meet the requirements as set forth by OSHA in its NRTL program.

 

"Parallel operation" or "parallel" means a distributed generation facility that is connected electrically to the electric distribution system for longer than 100 milliseconds.

 

"Point of interconnection" means the point where the distributed generation facility is electrically connected to the electric distribution system.  Point of interconnection has the same meaning as the term "point of common coupling" defined in Section 3.1.13 of IEEE Standard 1547.

 

"Primary line" means an electric distribution system line operating at greater than 600 volts.

 

"Queue position" means, for each distribution circuit or line section, the order of a completed interconnection request relative to all other pending completed interconnection requests on that distribution circuit or line section.  It is established by the date that the EDC receives the completed interconnection request.

 

"Radial distribution circuit" means a circuit configuration in which independent feeders branch out radially from a common source of supply.

 

"Scoping meeting" means a meeting between representatives of the applicant and EDC conducted for the purpose of discussing interconnection issues and exchanging relevant information.

 

"Secondary line" means an electric distribution system line, or service line, operating at 600 volts or less.

 

"Shared transformer" means a transformer that supplies secondary voltage to more than one customer.

 

"Spot network" means a type of electric distribution system that uses two or more inter-tied transformers to supply an electrical network circuit.  A spot network is generally used to supply power to a single customer or a small group of customers.  Spot network has the same meaning as the term "spot network" defined in Section 4.1.4 of IEEE Standard 1547.

 

"Standard distributed generation interconnection agreement" means a standard interconnection agreement applicable to interconnection requests for distributed generation facilities.  (see Appendices A and D).

 

"UL Standard 1741" means the standard titled "Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources (January 28, 2010), Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook IL 60062-2096.  This incorporation does not include any later amendments or editions.

 

"Witness test" means a verification either by an on-site observation or review of documents that the interconnection installation evaluation required by IEEE Standard 1547 Section 5.3 and the commissioning test required by IEEE Standard 1547 Section 5.4 have been performed.  For interconnection equipment that has not been lab-certified, the witness test shall also include verification of the on-site design tests as required by IEEE Standard 1547 Section 5.1 and verification of production tests required by IEEE Standard 1547 Section 5.2.  All verified tests are to be performed in accordance with the test procedures specified by IEEE Standard 1547.1.

 

(Source:  Amended at 41 Ill. Reg. 862, effective January 20, 2017)