This Draft for Development specifies requirements for newly manufactured electronic secondary meters of sub-meters which measure either electrecal energies alone or electrical energies together with other eclectrical parameters associated with the energy.It applies to meters that measure active energy,apparent energy, reactive energy(capactive,inductive and/or total), and ampere squared hours (A2h) and to the measurement of current,voltage, active power,apparent power,reactive power (capacitive,inductive and/or total), power factor,phase angle and frequency when measured in addition to an energy.
It aoolies to all secondary and sub-meters for indoor and outdoor applications,both porthble and permanently installed, for all power frequencies including d.c. It also applies to all registers, indicators,displays and outputs,and to the operation of test outputs.
It does not apply to primary meters,to data interfaces to the meters, or to load survey analysers of load survey meters.The reliability aspest is not covered in this draft.
BS DD 8431:2005 history
2010BS 8431:2010 Electrical static meters for secondary metering and sub-metering - Specification
2005BS DD 8431:2005 Electrical static meters for secondary metering and sub-metering - Specification