Section 466.20 Definitions

Section 466.20  Definitions

Terms defined in Section 16-102 of the Public Utilities Act

[220 ILCS 5] 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:

"Act" means the Public

Utilities Act [220 ILCS 5].

"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 energy resources 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 energy resources 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

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 energy resources 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".

"Contingent upgrades"

means proposed interconnection facilities or distribution system upgrades,

identified during interconnection studies for an applicant's interconnection

request, that are the responsibility of an interconnection request earlier in

the queue than the subject application for interconnection. The identified

contingent upgrades are required in order for the applicant's proposed

interconnection request to receive permission to operate and, if delayed or not

built by the earlier-queued interconnection request, could cause a need for

restudies of the interconnection request and may become the responsibility of

the applicant's interconnection request.

"Distributed energy resources

facility" or "DER" facility means the equipment used by an

interconnection customer to generate or store electricity that operates in

parallel with the electric distribution system.  A DER facility may include,

but is not limited to, an electric generator or energy storage system, 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 DER facility.  Distribution upgrades

do not include interconnection facilities

energy storage system, 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 DER 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.

"Earlier in the queue"

means that an interconnection request relative to another interconnection

request retains the rights to use any available distribution system capacity

first and may be interconnected first.

"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"

excludes facilities under the operational control of the regional transmission

organization (RTO) that would otherwise be classified as distribution.

"Energy storage system" (ESS)

means a mechanical, electrical, or electrochemical means to store and release

electrical energy, and its associated electrical inversion device and control

functions

) of electricity.  "Electric distribution system"

excludes facilities under the operational control of the regional transmission

organization (RTO) that would otherwise be classified as distribution.

"Energy storage system" (ESS)

means a mechanical, electrical, or electrochemical means to store and release

electrical energy, and its associated electrical inversion device and control

functions.

"Export capacity" means

the nameplate capacity in kilovolt amperes (kVA) of a DER facility except where

that capacity is limited by an acceptable means as identified in Section

466.75.

"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.

"Host load" means the

electrical power registered by the EDC during the prior 12-month period at the

customer meter to which the proposed DER facility is to be interconnected.

"IEEE" is the Institute

of Electrical and Electronics Engineers, Inc., 3 Park Avenue, New York NY

10016-5997 (http://www.ieee.org).

"IEEE C37.90" is the

IEEE Standard C 37.90 (2005), "IEEE Standard for Relays and Relay Systems

Associated with Electric Power Apparatus".

This

incorporation does not include any later amendments or editions.

"IEEE C37.90.1" is the

IEEE Standard C37.90.1 (2012), "IEEE Standard for Surge Withstand

Capability (SWC) Tests for Relays and Relay Systems Associated with Electric

Power Apparatus".

This incorporation does not

include any later amendments or editions.

"IEEE C37.90.2" is the

IEEE Standard C37.90.2 (2004), "IEEE Standard for Withstand Capability of

Relay Systems to Radiated Electromagnetic Interference from Transceivers"

tandard C37.90.1 (2012), "IEEE Standard for Surge Withstand

Capability (SWC) Tests for Relays and Relay Systems Associated with Electric

Power Apparatus".

This incorporation does not

include any later amendments or editions.

"IEEE C37.90.2" is the

IEEE Standard C37.90.2 (2004), "IEEE Standard for Withstand Capability of

Relay Systems to Radiated Electromagnetic Interference from Transceivers".

This incorporation does not include any later

amendments or editions.

"IEEE C62.92.6" is the

IEEE Standard C62.92.6 (2017), "IEEE Guide for Application of Neutral

Grounding in Electrical Utility Systems, Part VI--Systems Supplied by Current-Regulated

Sources". This incorporation does not include any later amendments or

editions.

"IEEE Standard 519-2014"

is the IEEE Standard 519-2014 "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.

"Inadvertent

export" means the unpermitted, unscheduled, and uncompensated export of

real power from a DER facility and exported across the point of interconnection

to the EDC's distribution system.

"Interconnection customer"

means a person or entity that interconnects, or seeks to interconnect, a DER

facility to an electric distribution system

es not include any later amendments or editions.

"Inadvertent

export" means the unpermitted, unscheduled, and uncompensated export of

real power from a DER facility and exported across the point of interconnection

to the EDC's distribution system.

"Interconnection customer"

means a person or entity that interconnects, or seeks to interconnect, a DER

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 DER facility.  After installation, interconnection

facilities become part of the electric distribution system.  Collectively,

interconnection facilities include all facilities and equipment between the DER

facility's interconnection equipment and the point of interconnection,

including any modifications, additions, or upgrades necessary to physically and

electrically interconnect the DER 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 DER facility or to change the capacity or other operating

characteristics of an existing DER facility already interconnected with the

electric distribution system.

"Interconnection

study" is any study described in Section 466.120

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 DER facility or to change the capacity or other operating

characteristics of an existing DER 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.

"Like-kind modification"

means a modification to interconnection equipment such that the installed

interconnection equipment has analogous certification, size, ratings,

impedances, efficiencies, and operating capabilities.

"Limited export" means

the exporting capability of a DER facility whose generating capacity is limited

below the nameplate capacity by the use of a configuration or operating mode as

described in Section 466.75.

"Line section" is that

portion of an electric distribution system connected to an interconnection

customer's site, bounded by automatic sectionalizing devices 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.

"Material

modification" has the meaning ascribed in Section 466.125.

"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 10 hours of work and $5,000 in

materials

rd 1547.

"Material

modification" has the meaning ascribed in Section 466.125.

"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 10 hours of work and $5,000 in

materials.

"Nameplate capacity" is

the maximum rated output in kVA of a generator, prime mover, energy storage

system, 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 18, 2020).  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.

"Non-export" or

"non-exporting" means that the DER facility is sized and designed,

such that no electrical energy other than inadvertent export allowed by Section

466.75 is transferred from the DER facility to the electric distribution

system.

"Operating profile"

means the manner in which the DER facility is designed to be operated, based on

the generating prime mover and operating characteristics, including any energy

storage system.

"Parallel operation" or "parallel"

means a DER facility that is connected electrically to the electric

distribution system for longer than 100 milliseconds.

"Point of interconnection"

or "POI" means the point where the DER facility is electrically

connected to the electric distribution system

ed on

the generating prime mover and operating characteristics, including any energy

storage system.

"Parallel operation" or "parallel"

means a DER facility that is connected electrically to the electric

distribution system for longer than 100 milliseconds.

"Point of interconnection"

or "POI" means the point where the DER 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.

"Power control system"

means systems or devices that electronically limit or control steady state

currents to a programmable limit.

"Power rating configuration

setting" means the as-configured value of the active or apparent power

ratings that is used as the rating within the DER facility.

"Primary line" means an

electric distribution system line operating at greater than 600 volts.

"Protective function"

means the specific type of protection, based on the ANSI Protection Device

Numbers and functional descriptions, that a utility-grade protective relay

provides against conditions that, if left uncorrected, could result in, but not

limited to, the following:  harm to personnel, damage to equipment, loss of

safety or reliability, or operation outside pre-established parameters required

by the interconnection agreement.

"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.

"Regional Transmission

Organization" or "RTO" means the independent systems operator

that administers and oversees the wholesale electricity markets in which the

State participates

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.

"Regional Transmission

Organization" or "RTO" means the independent systems operator

that administers and oversees the wholesale electricity markets in which the

State participates.  In Illinois, the two RTOs are the Midcontinent Independent

System Operator, Inc. and PJM Interconnection, LLC.

"Scoping meeting" means

a meeting between representatives of the applicant and EDC conducted to discuss

interconnection issues and exchange 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 DER interconnection

agreement" means a standard interconnection agreement applicable to

interconnection requests for DER 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

rconnection requests for DER 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.

"UL 1741 CRD for PCS"

means the Certification Requirement Decision for Power Control Systems for the standard

titled "Inverters, Converters, Controllers and Interconnection System

Equipment for Use With Distributed Energy Resources" (March 8, 2019),

Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook IL 60062-2096.

This incorporation does not include any later amendments or editions.

"Utility-grade protective

relay" means a protective relay system that works under a variety of

environmental and operational conditions and that includes:

Test plugs/switches for testing

the operation of the relay without unwiring or disassembly;

Targets to indicate relay

operation;

Ability to record and store fault

events; and

Conformance with

IEEE C37.90, IEEE C37.90.1 and IEEE C37.90.2.

"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.