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Which meter type is used for revenue metering at distribution voltage?

Self-contained metering

Transformer metering

Demand metering

Primary metering

Primary metering means placing the revenue meter on the distribution-side of the transformer, i.e., measuring at the distribution voltage. This is used for revenue metering on large customers or feeders because it records energy before the voltage is stepped down to service voltage, giving accurate billing data for the power flowing on the distribution circuit. The meter can be direct-connected if rated for that voltage and current, or it can use voltage transformers and current transformers to scale the signal down to the meter’s range.