Scope
The ETSI standard ES 202 336-12 defines the measurement and monitoring of power, energy, and environmental (PEE) parameters for ICT equipment in telecommunications, data centres, or customer premises, as well as the interface to obtain these parameters according to ETSI ES 202 336-1. This interface enables correlating these parameters with ICT equipment performance parameters. In addition to power and energy, environmental parameters like temperature and humidity are also defined.
This document focuses on ICT equipment, whereas other standards in the 202 336 series define measurements at the site and room levels (non-ICT equipment).
Summary
Power consumption measurements can be conducted internally (type 1 measurement, preferred) or externally (type 2 measurement) to the ICT equipment, and energy metering is based on it. Most requirements are common between type 1 and type 2. The relevant clauses about energy consumption and efficiency are:
- Clause 4.4.3.1 defines instant power P(t), power consumption – or actually, energy consumption – over an interval E(Tr), and mean power over an interval P(Tr), taking voltage and current as inputs:
Also, the corresponding time-discrete expressions (taking into account analog-digital conversion) are defined:
A power factor close to 1 is assumed.
- Clause 4.4.3.3 states that active power and energy metering must be ±3% accurate at 25-100% of maximum load and ±5% accurate at 5-25% load for the indoor temperature range (all ±5% for the outdoor temperature range).
- Clause 4.4.3.4 describes a local acquisition record meant for averaging/accumulating measurements over a reporting period. The reporting period shall be set between 5 and 60 minutes, with a recommendation of 15 minutes and an option of 1 minute.
Links
Clauses 4.4.3.1, 4.4.3.3, and 4.4.3.4, and Annexes A and B are referenced from 3GPP TS 28.552 to define how energy, power, temperature, voltage, current, and humidity are to be measured for 5GS. The energy measurements are most relevant, as they are used within 3GPP TS 28.554 to define the energy efficiency and consumption key performance indicators.
Relevance for EXIGENCE
Relevant for energy measurements.
