IEC 63297:2025

Overview

IEC 63297:2025 - "Sensing Devices for Non-Intrusive Load Monitoring (NILM) Systems" - is an international standard from the International Electrotechnical Commission (IEC) that classifies sensing devices deployed in NILM systems. NILM, or non-intrusive load monitoring, is an advanced technique used for estimating and disaggregating energy consumption across different appliances or usages from measurements taken at a single point in an electrical installation (such as a building or industrial site).

This standard provides guidance on classifying sensing devices according to key performance parameters aligned with state-of-the-art NILM technologies. It aims to facilitate comparison, selection, and deployment of NILM sensing devices in AC and, potentially, DC electrical distribution networks.

Key Topics

• NILM Sensing Device (NSD) Classification: IEC 63297:2025 introduces clear classes for NILM sensing devices (NSDs) based on three essential parameters:
  • Sampling frequency (from <5 kHz up to ≥1 MHz and parameters-only devices)
  • Output data rate (from >30 minutes per data set down to ≤0.1 seconds)
  • Data bit rate (from