Time Pattern Regime

Time Pattern Regimes (TPRs) are the detailed timing rules that specify which half-hours of the day each meter register captures. Every SSC (Standard Settlement Configuration) links to one or more TPRs, which together define how a meter's consumption is split across different time periods for billing.

Why TPRs matter:

For multi-rate tariffs like Economy 7, TPRs define exactly when "night" and "day" rates apply. While you might think "night rate = midnight to 7am", the actual switching times vary and are precisely defined by the TPR code.

How TPRs work:

Each day has 48 settlement periods (00:00-00:30 is period 1, 00:30-01:00 is period 2, etc.). A TPR specifies which periods belong to each register:

Clock vs Switch TPRs:

• Clock TPRs (Type C): Fixed times that don't change seasonally
• Teleswitch TPRs (Type S): Radio-controlled switching that can vary

Relationship to SSC:

Each SSC links to 1-6 TPRs. For example:

• SSC 0393 (7-hour E7): Links to 2 TPRs (day and night)
• SSC 0144 (6-rate SToD): Links to 6 TPRs (seasonal time-of-day rates)

Finding TPR data:

TPR definitions are maintained in Elexon's Market Domain Data (MDD). EnergyCode provides TPR reference data through the MHHS Reference feature and Enterprise API.