Overview
IEC TR 62055-21:2005 - "Electricity metering - Payment systems - Part 21: Framework for standardization" provides a structured framework for integrating standards into a system specification for electricity payment metering systems. The technical report defines the application process, generic processes, generic functions, data elements, and system entities and interfaces that exist in current payment metering systems, enabling consistent specification, interoperability and procurement.
Key Topics and Requirements
- Generic entity model and application process reference model for payment metering systems, describing roles and interactions between system components.
- Generic functions (e.g., metering, accounting, receipting, security, time, display, recording, data exchange) and their sub-classifications to support modular system design.
- Generic processes such as supply agreement, meter reading, billing, payment receipting, token vending, and system testing that form the lifecycle of a payment metering application.
- Data elements and records required for transactions, tokens and meter configuration to ensure consistent data exchange and auditing.
- System entities and interfaces including CIS (Customer Information System), POS (Point Of Sale), Token_Carrier, Token_Carrier_to_Meter and POS_to_Token_Carrier interfaces, and the Payment_Meter, specifying interaction points for interoperability.
- Example specification and annex showing how to derive requirements from an existing system and how to map functions, records and interfaces into a cohesive specification.
- Emphasis on security, time synchronization and testability as foundational requirements for reliable payment metering implementations.
Applications and Practical Value
IEC TR 62055-21 is a practical framework used to:
- Develop vendor-neutral system specifications for prepayment and postpaid electricity metering.
- Guide integration between meters, token vending systems, POS terminals and utility back-office systems.
- Support interoperability and procurement by defining common functions, interfaces and data elements.
- Inform testing, certification and compliance activities by enumerating processes and function classes.
- Assist utilities, system integrators and manufacturers in designing scalable, auditable payment metering solutions.
Who Should Use This Standard
- Electricity utilities and metering service providers
- Meter manufacturers and embedded system designers
- POS and token vending solution vendors
- System integrators and software developers for CIS/back-office systems
- Test laboratories, regulators and standards committees
Related Standards
- Part of the IEC 62055 series (payment metering standards). Use this framework in combination with other applicable IEC metering standards and local regulatory requirements when specifying or deploying payment metering systems.
Keywords: IEC TR 62055-21, electricity metering, payment metering systems, payment meter, token carrier, point of sale (POS), Customer Information System (CIS), metering standard, framework for standardization.