Glossary

Glossary Terms A - B

Please note that each glossary term is followed by the source of the definition.

Act (Ameren Illinois Tariff)
Public Utilities Act or Act means the Illinois Public Utilities Act, 220 ILCS 5/1-101 et seq.

Agent, Broker or Consultant (ABC)
An agent is a person or company that the customer has elected to give permission to act on behalf of the Customer for all purposes in arranging and managing services for the Customer. The Agent shall have on behalf of its Principle, the Customer, all rights and obligations, the Customer would have under the Company’s tariffs. The designation of an Agent shall not give the Customer or it Agent any additional rights than the Customer would have under the Company’s tariffs. The designation of an Agent shall not relieve the Customer of any obligation that it has under a tariff, including but not limited to the obligation to pay the Customer’s bill.

Broker is usually associated with natural gas transportation. That part of this program is under development and will be available later this year.

Consultants are generally associated with real time pricing and supply services purchased on an hourly price versus a fixed rate.

Alternative Retail Electric Supplier (Public Utilities Act)
Every person, coop., corp., municipal corp., company, assoc., joint stock company or assoc., firm, partnership, individual, or other entity, their lessees, trustees, or receivers appointed by any court whatsoever, that offers electric power or energy for sale, lease or in exchange for other value received to one or more retail Customers, and shall include, without limitation, resellers, aggregators and power marketers, but shall not include (i) electric utilities (or any agent of the electric utility to the extent the electric utility provides tariffed services to retail Customers through that agent), (ii) any electric coop. or municipal system as defined in Sec. 17-100 to the extent that the electric coop. or municipal system is serving retail Customers within any area in which it is or would be entitled to provide service under the law in effect immediately prior to the effective date of this amendatory Act of 1997, (iii) a public utility that is owned and operated by any public institution of higher education of this State, or a public utility that is owned by such public institution of higher education and operated by any of its lessees or operating agents, within any area in which it is or would be entitled to provide service under the law in effect immediately prior to the effective date of this amendatory Act of 1997, (iv) a retail Customer to the extent that Customer obtains elec. power and energy from that Customer’s own cogeneration or self-generation facilities, (v) an entity that owns, operates, sells, or arranges for the installation of a Customer’s own cogeneration or self-generation facilities, but only to the extent the entity is engaged in owning, selling or arranging for the installation of such facility, or operating the facility on behalf of such Customer, provided however that any such third party owner or operator of a facility built after 01-01-99, complies with the labor provisions of Sec. 16-128(a) as though such third party were an ARES, or (vi) an industrial or manufacturing Customer that owns its own distribution facilities, to the extent that the Customer provides service from that distribution system to a third-party contractor located on the Customer’s premises that is integrally and predominantly engaged in the Customer’s industrial or manufacturing process; provided, that if the industrial or manufacturing Customer has elected delivery services, the Customer shall pay transition charges applicable to the electric power and energy consumed by the third-party contractor unless such charges are otherwise paid by the third party contractor, which shall be calculated based on the usage of, and the base rates or the contract rates applicable to, the third-party contractor in accordance with Sec. 16-102.

Ancillary Services or Ancillary Transmission Services (Ameren Illinois Tariff)
Ancillary Services means the ancillary services provided for in the Transmission Provider’s Federal Energy Regulatory Commission (FERC)-approved tariffs related to Transmission Service that the FERC requires either be provided or offered to a Customer taking the delivery component of Transmission Service.

Annual Contract Period (Ameren Illinois Tariff)
The period of time from January 2, 2007, through May 31, 2008, for the retail prices generated by the initial CPA and the period from June 1 through May 31 for each subsequent CPA.

Applicant (Ameren Illinois Tariff)
A Person who applies for Residential or Non-Residential service and/or who requests an Extension.

Auction Commencement Date (Ameren Illinois Tariff)
The date on which bidding begins in the Illinois Auction, as defined in this General Definitions section.

Auction Completion Date (Ameren Illinois Tariff)
The date on which bidding ends in the Illinois Auction.

Auction Manager (Ameren Illinois Tariff)
An independent auction administrator contracted to manage the Illinois Auction.

Auction Product (Ameren Illinois Tariff)
Electric power and energy and financial responsibility for applicable Ancillary Transmission Services for a specified period of time required by an electric utility to serve the electric power and energy requirements of its Retail Customers and procured through a process that employs the Illinois Auction. The Auction Products procured by the Company are for electric power and energy supply requirements.

Backup (Ameren Illinois Tariff)
The kWh generation capability rating for Customers with generation capacity of 5,000 kW or more and such generation is not used for emergency purposes.

Base Rates (Public Utilities Act)
The rates for those tariffed services that the electric utility is required to offer pursuant to subsection (a) of Sec. 16-103 and that were identified in a rate order for collection for the electric utility's base rate revenue requirement, excluding (i) separate automatic rate adjustments then in effect, (ii) special or negotiated contract rates, (iii) delivery services tariffs filed pursuant to Sec. 16-108, (iv) real-time pricing, or (v) tariffs that were in effect prior to October 1, 1996 and that base charges for services on an index or average of other utilities' charges, but including (vi) any subsequent redesign of such rates for tariff services that is authorized by the Commission after notice and hearing.

Basic Generation Service - Large Service Real-Time Pricing Load, or Real Time Pricing – Large (Ameren Illinois Tariff)
Basic Generation Service - Large Service Real-Time Pricing Load (BGS-LRTP) represents the sum of the hourly load, multiplied by a loss expansion factor, of all Customers who are 1000 kW and greater and take service under Rider RTP-L. Customers take Rider RTP-L if they opt for service under Rider RTP-L, return from RES supply and not eligible to take service under Rider BGS-L, have generation that qualifies them for Rider RTP-L, or request partial service from a RES. Customers taking service under Rider RTP-L will be supplied from the BGS-LRTP Supplier Forward Contracts.

Basic Generation Service, or Basic Generation Service-Fixed Price Load (Ameren Illinois Tariff)
BGS-FP Load represents the sum of the hourly load, multiplied by a loss expansion factor, of all residential and small commercial and industrial (C&I) Customers (less than 1000 kW) that have not chosen a RES. The retail supply tariff is known as Rider BGS. Customers under 1000 kW will have available to them an optional Real-Time Pricing tariff (Rider RTP). Customers taking service under Rider BGS or Rider RTP will be supplied from the BGS-FP Supplier Forward Contracts. The BGS-FP Load is divided into one or more Auction Products as described in the Competitive Procurement Auction Process part of this Rider.

Basic Generation Service - Large, or Basic Generation Service-Large Customer Fixed Pricing Load (Ameren Illinois Tariff)
BGS-LFP Load represents the sum of the hourly load, multiplied by a loss expansion factor, of all Customers 1000 kW and greater who have not opted to be served by a RES nor elected Rider RTP-L or interruptible service under Rider RTP-LI for their electric power and energy supply service during the Open Enrollment Period. Rider BGS-L contains the terms and conditions for Customers electing such service. Customers taking service under Rider BGS-L will be supplied from the BGS-LFP Supplier Forward Contracts.

BGS Group (Ameren Illinois Tariff)
BGS Group means the Auction Products, collectively, procured by the Company in the Fixed Price Section, as defined in this general definitions part, or the Auction Product procured by the Company in the Hourly Price Section, as defined in this general definitions part, of the Illinois Auction.

Billing Period (Ameren Illinois Tariff)
The interval between consecutive meter reading dates during which electric service is provided and billed for by Company.

Budget Billing Plan (Ameren Illinois Tariff)
An optional payment plan available to Rate DS-1 and DS-2 Customers where Company will bill Customer a monthly amount equal to one-twelfth of the estimated annual billings to the Customer.

Bundled Service (Ameren Illinois Tariff)
Includes electric power and energy provided by the Company under Rider BGS, BGS-L, RTP or RTP-L; transmission service, distribution Delivery Service, metering service and related services provided by the Company under the filed tariff schedules.

Glossary Terms C

Please note that each glossary term is followed by the source of the definition.
 
Category of Service or Category
(Ameren Illinois Tariff)
A load category as defined for the Illinois Auction for the classification of Customers as provided under BGS-FP load, BGS-LFP load and BGS-LRTP load.

Central Prevailing Time (CPT) (Ameren Illinois Tariff)
Central Standard Time or Central Daylight Savings Time, as applicable. (EEI)

Cogeneration (EEI)
The simultaneous production of electric energy and useful thermal energy for industrial, commercial, heating or cooling purposes. The Energy Information Administration (EIA) has adopted the term “Combined Heat and Power” in place of “cogeneration”.

Commercial Customer (EEI)
An energy-consuming sector that consists of service-providing facilities and equipment of non-manufacturing businesses, such as restaurants, retail stores, hotels; and other private organizations, such as religious, social, or fraternal groups. The commercial sector includes institutional living quarters. Common uses or energy associated with this sector include space heating, water heating, air conditioning, lighting, refrigeration, cooking, and running a wide variety of other equipment. Commercial Customers may be classified as a function of energy demand or annual usage, which meets some specified limit set by the energy provider.

Commission or ICC (Ameren Illinois Tariff)
The Illinois Commerce Commission or any duly constituted successor to the Commission.

Company (Ameren Illinois Tariff)
The legal entity noted in the header for which this Schedule is applicable.

Competitive Market (Public Utilities Act)
An electric market opened to the sale of electricity by various electricity suppliers.

Competitive Procurement Auction (CPA) (Ameren Illinois Tariff)
The auction processes as approved in the ICC's order entered in Docket No. 05-0160/05-0161/05-0162 (Cons.)

Competitive Procurement Process (CPP) (Ameren Illinois Tariff)
The processes undertaken to procure electric power and energy and other related services.

Competitive Service (Public Utilities Act)
Includes (i) any service that has been declared to be competitive pursuant to Section 16-113 of the Act, (ii) contract service, and (iii) services, other than tariffed services, that are related to, but not necessary for, the provision of electric power and energy or delivery services.

Control Area (EEI)
A region of integrated generation and transmission operations that is controlled by a single operator who is responsible for scheduling interchanges with other control areas and balancing supply and demand within the area.

Customer Charge (EEI)
An amount to be paid monthly by a Customer for electric service often based upon costs incurred for current and potential meter transformers, service line, billing, contact centers, credit and collections, exclusive of demand or energy consumption.

Customer Group (Ameren Illinois Tariff)
The service classifications under Rider BGS, Rider BGS-L, Rider RTP and Rider RTP-L.

Customer or Retail Customer (Ameren Illinois Tariff)
A Person legally receiving service at a Premises or whose facilities are connected for utilizing service at the Premises.

Customer Self-Manager (CSM) (Ameren Illinois Tariff)
A Non-Residential retail Customer meeting certain requirements as stated in the Company’s Supplier Terms and Conditions that manages the procurement and use of its own supply of electric power and energy.

Customer Supply Group (Ameren Illinois Tariff)
The designation used to determine the Customer loads attributable to each Category described in the Customer Supply Group in this Rider and for the purpose of computing charges for electric power and energy supply applicable to Retail Customers.

Glossary Terms D - F

Please note that each glossary term is followed by the source of the definition.

Delivery Point or Point of Delivery (Ameren Illinois Tariff)
Delivery Point or Point of Delivery shall have the same definition as 83 Ill. Admin. Code Part 410 Subpart A: General (Section 410.10). “Point of Delivery” means the point at which the entity providing distribution facilities connects its lines or equipment to the lines or facilities owned or rented by the Customer, without regard to the location or ownership of transformers, substation or meters, unless otherwise provided for by written contract or tariffs.

Delivery Services (DS) (Ameren Illinois Tariff)
Those services that are provided by the Company that are necessary in order for the transmission and distribution systems to function so that retail Customers located in the Company’s Illinois service area can receive electric power and energy from suppliers other than the Company, and shall include, without limitation, standard metering and billing.

Delivery Voltage (Ameren Illinois Tariff)
The voltage of Company’s lines at the Point of Delivery.

Demand or Billing Demand (Ameren Illinois Tariff)
The highest average load in kilowatts (kW) during any fifteen minute interval during the time between regular meter readings. There shall be four fixed 15 minute intervals per hour with the first interval beginning at the top of the hour as registered on the meter.

Demand Side Management (DSM) (EEI)
The planning, implementation, and monitoring of utility activities designed to encourage consumers to modify patterns of electricity usage, including the timing and level of electricity demand. It refers only to energy and load-shape modifying activities that are undertaken in response to utility-administered programs. It does not refer to energy and load-shape changes arising from the normal operation of the marketplace or from government-mandated energy-efficiency standards. DSM covers the complete range of load-shape objectives, including strategic conservation and load management, as well as strategic load growth.

Determination Period (Ameren Illinois Tariff)
The calendar month for which a Market Value Adjustment (MVA) is determined for Retail Customers for which the Company procures electric power and energy supply for the BGS-FP Category of Service and the BGS-LFP Category of Service. Determination Periods means the appropriate costing period determined for Retail Customers for which the Company procures electric power and energy supply for the BGS-LRTP Category of Service.

Development (Ameren Illinois Tariff)
Multiple Premises each receiving Non-Residential Services and located on a parcel or parcels of land whose site plan or plats have been recorded with the appropriate governmental agencies.

Direct Access
The ability of a retail Customer to purchase commodity electricity directly from the wholesale market rather than through a local distribution company. A key component of the restructuring process that allows Customers to obtain access to a utility's delivery services separate from the purchase of electric power and energy from authorized suppliers.

Direct Access Service Request (DASR) (EEI)
A request used by the Company, CSMs, RESs, and MSPs to process switching and certain other requests.

Distribution System (Ameren Illinois Tariff)
The lower voltage, smaller capacity network of wires and equipment that connects the transmission system to the Customer's home or business. For purposes of determining Line and/or Service Extension applicability, means those poles, wire, and other equipment used to distribute electricity either overhead or underground at 20 kV or less.

Effective Period (Ameren Illinois Tariff)
The monthly Billing Period during which an MVA is applied to kilowatt-hours (kWhs) provided to Retail Customers. With respect to Retail Customers for which the Company procures electric power and energy supply for the BGS-FP Category of Service and the BGS-LFP Category of Service, the Effective Period is the monthly billing period occurring two months after the Determination Period, and the March 2007 monthly Billing Period is the first such Effective Period. With respect to Retail Customers for which the Company procures electric power and energy supply for the BGS-LRTP Category of Service, the Effective Period relates to how the costs are adjusted.

End of Business (Ameren Illinois Tariff)
5:00 p.m. CPT

Energy (Supplier Forward Contract)
Three-phase, 60-cycle alternating current electric energy expressed in units of kilowatt-hours or megawatt-hours.

Energy Efficiency Contractor (EE Contractor)
An Energy Efficiency Contractor is an entity that contracts to perform work with the primary focus being the energy efficiency ratio for a building and its appliances. For further incentives, review Ameren’s ActOnEnergy.com website.

Federal Energy Regulatory Commission (FERC) (Ameren Illinois Tariff)
The Federal Energy Regulatory Commission or any successor federal agency, commission, or department.

Filing Month (Ameren Illinois Tariff)
Filing Month means the month in which the MVA is determined and filed with the Illinois Commerce Commission.

Firm Point-to-Point Transmission Service (Ameren RES Handbook)
Transmission Service that is reserved and/or scheduled between specified Points of Receipt and Delivery pursuant to Part II of MISO's EMT.

Fixed Price Section (Ameren Illinois Tariff)
The part of the Illinois Auction through which Auction Products are procured for which charges to Retail Customers are fixed for specified periods of time.

Glossary Terms G - L

Please note that each glossary term is followed by the source of the definition.

Generation Company (EEI)
The concept of a company that is solely engaged in the function of generating electricity.

Generator (EEI)
A machine which transforms mechanical energy into electric energy.

Grid (EEI)
An interconnected network of electric transmission lines, and related facilities.

Hourly Price Section (Ameren Illinois Tariff)
The part of the Illinois Auction through which Auction Products are procured for which charges to Retail Customers include a component that varies on an hourly basis.

Illinois Auction (Ameren Illinois Tariff)
A competitive process, conducted in accordance with the ICC's Order entered in the Docket Nos. 05-0160/05-0161/05-0162 (Cons.) and this Rider, through which the Company procures electric power and emery supply it requires for Customers choosing electric power and energy service from the Company. The Illinois Auction may include with other electric utilities that provide for the electric power and energy supply requirements of any such other electric utility's Retail Customers, in accordance with applicable orders issued by the ICC.

Illinois Auction Rules (Ameren Illinois Tariff)
The rules for the Illinois Auction established by the Auction Manager in compliance with this Rider and orders from the ICC.

Illinois Commerce Commission (ICC) or Commission (Ameren Illinois Tariff)
The Illinois Commerce Commission or any duly constituted successor to the Commission.

Independent System Operator (ISO) (EEI)
An independent, federally regulated control area operator with the primary responsibility of ensuring short-term reliability of the transmission grid. An ISO performs essentially the same function as a Regional Transmission Organization (RTO), but may not have the same requirements for regional configuration as an RTO.

Investor-owned Utility (EEI)
A privately-owned electric utility whose stock is publicly traded. It is rate regulated and authorized to achieve an allowed rate of return. Also known as a Shareholder-Owned Electric Utility or IOU.

Kilovar (kVAr) (EEI)
1,000 reactive voltamperes.

Kilowatt (kW) (Ameren Illinois Tariff)
A unit of measurement of the demand for electricity or rate at which electricity is used.

Kilowatt-hour (kWh) (Ameren Illinois Tariff)
A unit of measurement of the amount of electricity used.

kW-Day (Ameren Illinois Tariff)
The highest average load in kW during any fifteen minute interval during the calendar day for Customers in the Self-Generating Customer Group, and MW-Day/1000 for all other Customers.

Landlords and Property Managers
Landlords and property manages can use Ameren's Property Management site to help manage their units. The service provides managers with the ability to turn on/turn off service, receive notification of disconnection and much more.

Letter of Agency (LOA) (Ameren Illinois Tariff)
A document, as described in Section 2EE(2) of the Consumer Fraud and Deceptive Business Practices Act (815 ILCS 505/2EE(2)), provided by a Customer to the Retail Electric Supplier or Metering Services Provider to authorize that RES or MSP to change or provide certain services for such Customer.

Line Extension (Ameren Illinois Tariff)
Line Extension, for purposes of calculating Extension charges, is that portion of a single- or multi-phase Distribution System Extension on public right-of-way built to potentially serve additional Customers.

LMP (Locational Marginal Price) Market (Public Utilities Act)
An energy market operated by the MISO in which Energy is bought and sold at prices that vary with the points of delivery.

Load (EEI)
The term "load" is considered synonymous with "demand". "Load" may also be defined as an end-use device or an end-use customer that consumes power. Using this definition of "load," "demand" is the measure of power that a "load" receives or requires.

Load Forecast (EEI)
Predicted demand for electric power. A load forecast may be short-term (e.g., 15 minutes) for system operation purposes, long-term (i.e., 5 to 20 years ) for generation planning purposes, or for any range in between. Load forecasts may include peak demand (kW), energy (kWh), reactive power (kVAr) and/or load profile. Forecasts may be made of total system load, transmission load, substation/feeder load, individual customers' loads, and /or appliances.

Load Profile (EEI)
Shows the quantity of energy used by a class of customers or individual customer at specific time/intervals over a 24-hour period.

Local Distribution Utility (LDU) (EEI)
The utility that delivers electricity to a retail customer’s home or business along the distribution poles, wires and other necessary equipment, that the LDU either owns or operates (formerly a local electric utility).

Locational Marginal Price (LMP) (Ameren Illinois Tariff)
The price calculated and published by the MISO for a given point of delivery or collection of points of delivery.

Long-Term Firm Point-to-Point Transmission Service (Ameren RES Handbook)
Firm Point-to-Point Transmission Service under Part II of MISO's EMT with a term of one year or more.

Glossary Terms M - N

Please note that each glossary term is followed by the source of the definition.
 
Market Value (MV)
(Ameren Illinois Tariff)
Market Value or MV is being used consistent with the provisions of Section 16-112 and Section 16-111(i) of the Customer Choice Law.

Megawatt (MW) (Ameren Illinois Tariff)
Equals 1,000 kilowatts. MW is a unit measurement of the demand for electricity or rate at which electricity is used.

Megawatt-hour (MWh) (Ameren Illinois Tariff)
Equals 1,000 kWh. MWh is a unit of measurement of the amount of electricity used.

Meter Voltage (Ameren Illinois Tariff)
The voltage of the Company's or Customer's electric system at the point at which the metering is connected for the purpose of measuring power and energy for utility billing purposes.

Metering Services (Ameren Illinois Tariff)
The functions specified in 83 Illinois Administrative Code Part 460.

Metering Services Provider (MSP) (Ameren Illinois Tariff)
A retail provider of unbundled Metering Services, other than the Company, certified by the ICC and authorized to engage in the provision of Metering Services to eligible retail electric service Customers in the Company’s Service Territory.

Midwest Independent Transmission System Operator (MISO) (Ameren Illinois Tariff)
The Midwest Independent Transmission System Operator, Inc., or its successor. The MISO is a fully integrated regional transmission organization. The non-profit MISO assures industry consumers of unbiased regional grid management and open access to the transmission facilities under MISO’s functional supervision. MISO optimizes the efficiency of the interconnected system, provides regional solutions to regional planning needs, and continually minimizes any risk to reliability.

MISO Administered Markets (Ameren Illinois Tariff)
The markets for capacity and real-time energy, if any, administered by the MISO.

MISO Delivery Point (Rider MV) (Ameren Illinois Tariff)
The load zone(s) recognized by the MISO as encompassing the BGS-FP Load, BGS-LFP Load and BGS-LRTP Load of the Company.

MISO Off-Peak Period (Ameren Illinois Tariff)
All hours other than those included in the MISO Peak Period.

MISO Peak Period (Ameren Illinois Tariff)
The hours from 6 A.M. until 10 P.M. Central Prevailing Time (CPT), Monday through Friday except on days designated by the NERC.

Multi-Account Managers
Those who assist business entities or the customers themselves needing to consolidate and organize multiple accounts can use this portal to aid in management of the accounts.

Multi-Tenant (Ameren Illinois Tariff)
A multiple occupancy building with three or more Customers who each qualify for the Residential rate or two or more Customers who each qualify for a Non-Residential rate.

MW-Day (Ameren Illinois Tariff)
MW-Day means the Customer's contribution to the previously established annual system peak demand, plus any applicable reserve requirement required by the regional reliability entity to which the Company belongs.

NERC (Ameren Illinois Tariff)
The North American Electric Reliability Council or its successor.

Non-Refundable Contribution (Ameren Illinois Tariff)
An amount paid prior to construction by a Customer and/or Applicant to Company that is not subject to refund.

Non-Residential Service (Ameren Illinois Tariff)
Non-Residential Service, for purposes of determining Line and/or Service Extension applicability, is the electric utility service rendered which does not meet the definition of Residential Service as defined in Section 3 of Company’s tariffs.

Non-Summer Period (Ameren Illinois Tariff)
Non-Summer Period means the January, February, March, April, May, October, November, and December monthly periods.

Glossary Terms O - Q

Please note that each glossary term is followed by the source of the definition.
 
OASIS (Supplier forward Contract)
Open Access Same-time Information System. OASIS is a secured web site provided for use by transmission customers to electronically request transmission and ancillary services from transmission providers in a non-discriminatory, standardized method. The Transmission Provider receives and responds to requests for service via OASIS and also posts information on its tariff terms and prices for transmission service, availability of transmission capability, business practices and procedures for acquiring transmission service, and other relevant transmission information.

Off-Cycle Switching (Ameren Illinois Tariff)
An eligible Customer who switches to a different provider of electric power and energy supply services with such switch effective on a date other than on the Company's normally scheduled meter reading or billing cycle date.

Open Access (EEI)
A regulatory mandate to allow others to use a utility's transmission and distribution facilities to move bulk power from one point to another on a nondiscriminatory basis for a cost-based fee.

Open Enrollment Period (Ameren Illinois Tariff)
The period in which Customers can enroll for service under Rider BGS-L for the next Annual Contract Period. The length of the Open Enrollment Period varies dependent upon the Customer's Demand in accordance with the ICC's Order entered in Docket Nos. 05-0160/05-0161/05-0162. (Cons.). In addition, Customers at or above 3,000 kW of Demand must sign the non-binding Pre-Qualification Form for their load to be included in the CPA under BGS-LFP Category in order to be eligible to elect service under Rider BGS-L during the Open Enrollment Period.

Partial Requirements Supply Service (PRSS) (Ameren Illinois Tariff)
Partial Requirements Supply Service or PRSS means a portion of a Customer’s electric power and energy supply requirements that may be provided as Company-supplied power and energy subject to the Terms and Conditions as specified in Rider RTP, Rider RTP-L and Rider RTP-LI.

Person (Ameren Illinois Tariff)
A natural Person, corporation, developer, firm, real estate trust, partnership, organization, association or other legal entity.

Points of Delivery (Ameren RES Handbook)
Point(s) on the Transmission Provider's Transmission System where capacity and energy transmitted by the Transmission Provider will be made available to the receiving party under Part II of MISO's EMT. The Point(s) of Delivery shall be specified in the Service Agreement for Long-Term Firm Point-To-Point Transmission Service.

Points of Receipt (Ameren RES Handbook)
Point(s) of interconnection on the Transmission Provider’s Transmission System where capacity and energy will be made available to the Transmission Provider by the Delivering party under Part II of MISO’s EMT. The Point(s) of Receipt shall be specified in the Service Agreement for Long-Term Firm Point-To-Point Transmission Service.

Point-to-Point Transmission Service (Ameren RES Handbook)
The reservation and transmission of capacity and energy on either a firm or non-firm basis from the Point(s) of Receipt to the Point(s) of Delivery under Part II of MISO’s EMT.

Power Marketer (EEI)
Business entity that engages in buying, selling and marketing electricity in the wholesale markets. Power marketers, unlike power brokers, take title to the electricity. Power marketers that sell electricity for resale at wholesale prices are considered to be public utilities under the Federal Power Act. Power marketers are required to be certified by the Federal Energy Regulatory Commission (FERC). A Power Marketer may also be an Alternative Retail Electric Supplier (ARES).

Premises (Ameren Illinois Tariff)
A contiguous tract of land separated by nothing more than a highway, street, alley or railroad right-of-way where all buildings and/or electric consuming devices located thereon are owned or occupied by a single Customer or applicant for electric service, or where all electricity delivered thereto is utilized to supply one or more buildings and/or electric loads which the Company considers as components of a unified operation.

Pre-Qualification Form (Ameren Illinois Tariff)
The non-binding form a Customer, at or above 3,000 kW of Demand, must sign for their load to be included under the BGS-LFP Category in order to be eligible to elect service under Rider BGS-L during the Open Enrollment Period.

Public Utilities Act (Act) (Ameren Illinois Tariff)
The Illinois Public Utilities Act, 220 ILCS 5/1-101 et seq.

Public Utility Regulatory Policies Act (PURPA) (EEI)
One of the five bills signed into law on November 8, 1978 as the National Energy Act. It sets forth procedures and requirements applicable to state utility commissions, electric and natural gas utilities and certain federal regulatory agencies. A major aspect of this law is the mandatory purchase obligation from qualifying facilities.

QF (Qualifying Facility) Generation (Supplier Forward Contract)
Capacity or Energy delivered to a Company from a Qualifying Facility as that term is defined in 83 IAC Part 430 that is not included in MISO’s market model and is not considered as generation by MISO for the purposes of the calculation of the zonal load.

Qualifying Facility (QF) (Supplier Forward Contract)
A cogeneration facility or a small power production facility which meets the criteria for qualification set forth in Subpart B of 18 CFR 292.

Glossary Terms - R

Please note that each glossary term is followed by the source of the definition.

Reactive Demand (Ameren Illinois Tariff)
The flow of reactive power in kilovars (kvar) from Company's system to Customer's facilities in any 15-minute Billing Demand period, adjusted for energy losses, if applicable.

Reactive Power (EEI)
The portion of electricity that establishes and maintains the electric and magnetic fields of alternating-current equipment. It is used to control voltage on the transmission network. Reactive power must be supplied to most types of magnetic equipment, such as motors and transformers. It also must supply the reactive losses on transmission facilities. Reactive power is provided by generators, synchronous condensers, or electrostatic equipment such as capacitors and directly influences electric system voltage. It is usually expressed in kilovars (kVAr) or megavars (MVAr), and is the mathematical product of voltage and current consumed by reactive loads. Examples of reactive loads include capacitors and inductors. These types of loads, when connected to an alternating current voltage source, will draw current, but because the current is 90 degrees out of phase with the applied voltage, they actually consume no real power.

Real Time Pricing (Public Utilities Act)
Charges for delivered electric power and energy that vary on an hour-to-hour basis for retail customers.
  
Realtors
A Realtor is an entity working with Ameren energy efficiency programs and the customer to sell, rent, or invest in the customer’s property(s). Realtors can now access 12-24 months of electricity and natural gas usage history, dollar amounts charged for consumption and an average bill amount.

Refundable Deposit (Ameren Illinois Tariff)
An amount paid by a Customer and/or Applicant in cash or other payment arrangements available and agreed to by the Company, to the Company, that potentially may be refunded in whole or in part, when certain conditions are met.

Regional Transmission Organization (RTO) (Ameren Illinois Tariff)
An independent organization formed by transmission owners, transmission users, and other entities that is responsible for ensuring nondiscriminatory open transmission access and the planning and security of the combined bulk transmission systems of transmission owners within a given geographic region, and which has been approved by FERC pursuant to Order No. 2000, 89 FERC ¶ 61.285 (1999).

Reliability (EEI)
The degree of performance of the elements of the bulk electric system that results in electricity being delivered to customers within accepted standards and in the amount desired. Reliability may be measured by the frequency, duration, and magnitude of adverse effects on the electric supply.

Residential (Ameren Illinois Tariff)
Those Customers eligible for Residential service pursuant to the Availability Section of Rate DS-1 - Residential Delivery Service.

Residential Service (Ameren Illinois Tariff)
Residential Service, for purposes of determining Line and/or Service Extension applicability, is the electric service rendered to two Customers or less on the same Premises and qualifying for the Residential rate.

Retail Aggregate Load (Ameren Illinois Tariff)
The electric power and energy delivered by the Company to its Retail Customers, including losses on the distribution and transmission systems located in the Company’s Service Territory.

Retail Aggregate Load - BGS-FP (Ameren Illinois Tariff)
The portion of the Retail Aggregate Load attributable to Retail Customers in the following Customer Groups as described in the Customer Supply Groups section of this Definitions part and served pursuant to the BGS-FP Category Auction Products:
Residential Customer Groups (BGS-1), Small General Service Customer Group (BGS-2), General Service Customer Group (BGS-3), Lighting Service Customer Group (BGS-5), Optional Real Time Pricing Customer Groups (RTP-1, RTP-2, RTP-3).

Retail Aggregate Load - BGS-LFP (Ameren Illinois Tariff)
The portion of the Retail Aggregate Load attributable to Retail Customers in the Large General Service (BGS-4) Customer Group as described in the Customer Supply Groups Definition section of this Definitions parts and served pursuant to the BGS-LFP Category Auction Products.

Retail Aggregate Load - BGS-LRTP (Ameren Illinois Tariff)
The Retail Aggregate Load attributable to Retail Customers in the Large General Service (RTP-4) Customer Group electing Real-Time Pricing and Retail Customers in the Large General Service Customer Group who self generate 5,000 kW or more as described in the Customer Supply Groups section of this Definitions part and served pursuant to the BGS-LRTP Category Auction Products.

Retail Electric Supplier (RES) (Ameren Illinois Tariff)
Retail Electric Supplier or RES means either:
(i) an Alternative Retail Electric Supplier (ARES), as long as it remains certified by the ICC pursuant to the Public Utilities Act, authorized to provide electric power and energy supply services in the Company’s service territory (or service area); or (ii) an Illinois electric utility other than the Company, providing electric power and energy service in Company’s service territory (or service area).

Retail Off-Peak period (Ameren Illinois Tariff)
Retail Off-Peak Period means all hours other than those included in the Retail Peak Period.

Retail Peak Period or Retail On-Peak Period (Ameren Illinois Tariff)
The hours from 10 A.M. until 10 P.M. Central Prevailing Time (CPT), Monday through Friday except New Year’s Day, Memorial Day, Fourth of July, Labor Day, Thanksgiving Day and Christmas Day or if one of the preceding holidays occurs on a Sunday, the Monday immediately following the holiday.

Retail Supply Charges (Ameren Illinois Tariff)
The Market Value prices determined pursuant to this Rider and applicable to Retail Customers electing electric power and energy supply from the Company.

Glossary Terms S - W

Please note that each glossary term is followed by the source of the definition.
 
Section (Ameren Illinois Tariff)
The Fixed Price Section or the Hourly Price Section within the Illinois Auction.

Service Area or Service Territory (Ameren Illinois Tariff)
Defined in Section 16-102 of the Act, the boundaries of which may be modified by Commission approval pursuant to the Electric Suppliers Act (220 ILCS 30/1 et seq).

Service Extension (Ameren Illinois Tariff)
Service Extension, for purposes of calculating Extension charges, is that portion of the Extension dedicated to the Customer, on Customer’s Premises and means the wiring and equipment used for delivering energy, regardless of voltage, from either the Distribution System or the Line Extension to the Company’s designated Point of Delivery.

Short-Term Firm Point-to-Point Transmission Service (Ameren RES Handbook)
Firm Point-to-Point Transmission Service under Part II of MISO’s EMT with a term of less than one year.

Single Billing or Single Billing Option (SBO) (Ameren Illinois Tariff)
A Customer's RES issues a single bill that contains the charges for the service provided by both the RES and the Company.

Small Commercial Retail Customer (Public Utilities Act)
A non-residential customer that consumes 15,000 kilowatt hours or less of electricity annually in its service area.

Staff (Ameren Illinois Tariff)
The Staff of the ICC.

Standard Cost Equivalent (Ameren Illinois Tariff)
The free line extension allowance which is the cost equivalent of up to 250 feet of single-phase overhead Distribution System, excluding the cost of a transformer, and any abnormal construction conditions or unusual expenditures.

Subdivision (Ameren Illinois Tariff)
A parcel or parcels of land consisting of four or more residential lots whose site plan or plats have been recorded with the appropriate governmental agencies.

Summer Period (Ameren Illinois Tariff)
The June, July, August, and September monthly periods.

Supplemental (Ameren Illinois Tariff)
Electric power and energy supply in excess of the amount classified as Backup.

Supplier Forward Contract (SFC) (Ameren Illinois Tariff)
A standard contract form pursuant to which the Company enters into binding wholesale contracts for the procurement of electric power and energy supply, and certain other related services, from suppliers as described in this Rider.

Supplier of Last Resort (EEI)
The company providing generation services to those who do not choose another supplier, are unable to find a supplier willing to serve them, or for some reason no longer receive generation services from another supplier. Typically, the Local Distribution Utility or Delivery Service Company is the Supplier of Last Resort.

Supply Voltage (Ameren Illinois Tariff)
The voltage of transmission or distribution lines used for delivery of electric energy to Customer’s Premises before the connection of transformers.

Tariff (EEI)
A document filed with the regulatory authority(s) (FERC and/or ICC) specifying lawful rates, charges, rules and conditions under which the utility provides service to the public.

Tariffed Service (Public Utilities Act)
Services provided to retail customers by an electric utility as defined by its rates on file with the Commission pursuant to the provisions of Article IX of the Act, but shall not include competitive services.

Tranche (Ameren Illinois Tariff)
Tranche of the Retail Aggregate Load - BGS-FP, or the Retail Aggregate Load - BGS-LFP or the Retail Aggregate Load BGS-LRTP means a percentage share of the Retail Aggregate Load - BGS-FP, or the Retail Aggregate Load - BGS-LFP or the Retail Aggregate Load BGS-LRTP, respectively in each hour. The approximate size of a Tranche is 50 MW of peak coincident retail load.

Transmission Customer (EEI)
Any eligible customer (or its designated agent) that can or does execute a transmission service agreement or can or does receive transmission service.

Transmission Provider (Ameren Illinois Tariff)
Any entity that owns, operates or controls facilities used for transmission of electric energy in interstate commerce and which provides Transmission Service under a tariff approved by FERC.

Transmission Service (Ameren Illinois Tariff)
The services identified as transmission services in the applicable tariffs on file with the FERC for the provision of transmission services within the Company's service territory.

Transmission System (EEI)
An interconnected group of electric transmission lines and associated equipment for moving or transferring electric energy in bulk between points of supply and points at which it is transformed for delivery over the distribution system lines to customers, or is delivered to other electric systems.

Unbundled Service (Public Utilities Act)
A component or constituent part of a tariffed service which the electric utility subsequently offers separately to its customers.

Usage History
A report that reflects 12-24 months of electric and/or natural gas consumption, the service address and the average bill amount.

Volt (EEI)
The unit of electromotive force or electric pressure analogous to water pressure in pounds per square inch. It is the electromotive force that, if steadily applied to a circuit having a resistance of one ohm, will produce a current of one ampere.

Watt (EEI)
The electric unit of power or rate of doing work.
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