scope:

The requirements of this Standard cover metrological requirements and associated testing for electrical energy submeters. The Standard applies to stand-alone meters with Standard inputs or metering systems comprising meters and associated sensors. These meters provide details of energy use for energy monitoring or revenue submetering.

The Standard does not apply to primary utility-owned meters.

The Standard includes AC and DC kilowatt-hour meters, demand meters, load survey meters, and power quality meters, single and four-quadrant meters, etc.

The Standard applies to indoor and outdoor applications and covers portable, permanently installed, and embedded meters.

The Standard covers AC meters rated at not more than 1000 V that measure active energy, apparent energy, reactive energy (capacitive, inductive and/or total) including received, delivered, and/or net and also those measuring current, voltage, active power, apparent power, reactive power (capacitive, inductive and/or total), power factor, phase angle, polarity, and frequency when measured in addition to energy.

The Standard also applies to DC meters rated not more than 1500 V that measure energy received, delivered, and/or net and also those that include additional measurement of power, current, and voltage.

The ESM1 Standard is broken into the following parts:

a. ESM1-1 General Requirements

b. ESM1-2 AC Active Energy Accuracy

c. ESM1-3 Revenue Submetering Requirements

d. ESM1-4 Additional Measurements Accuracy

e. ESM1-5 DC Energy Accuracy

f. ESM1-6 Power Quality Measurements and Accuracy

g. ESM1-7 Current Sensor Accuracy

h. ESM1-8 Demand Metering

i. ESM1-9 Field Testing