Table 1b: Accompanying laws and regulations

There are 13 efficiency measures EM and three EE performance levels EEPL (Table 3). At best, four points can be awarded per criterion, so that 64 points can be achieved in the highest class EIEC4.

Table 2: Energy efficiency classes for LV systems [1) not valid for residential buildings]

Implementation of the measures
The new regulation offers four quality levels EM0 - EM4 and EEPL0 - EEPL4 for each of the aspects mentioned. Their evaluation with points is based on calculation (e.g. transformer selection, positioning), measurement (load profile, cosϕ), analysis (e.g. IE-classified motor use) or consideration (e.g. reactive power; residential buildings do not require BLK compensation, the criterion not to be considered immediately leads to four points). Planned control measurements with permanent logging of the load, for example, require special devices such as the energy monitoring server (image). It collects, stores and processes measured values from the connected products. The integrated LAN interface forwards this data to the relevant end devices (PC, notebook, tablet) via its web server functionality. Alarm messages can be sent in a targeted manner using an email notification function. The device supports visualized evaluation in accordance with DIN VDE 0100-801.

Table 3: Efficiency profiles EM, EEPL (0-4, score 1-4)

Outlook
As a step towards EE in LV switchgear, the new part of the standard - without limit values - requires a complete examination of the system. Its low loss is described in a reproducible and transparent manner for all functional groups via the scalable point evaluation resulting in the efficiency class with continuous, metrological monitoring of certain states. Determining the class is part of qualified system project planning. As a result, it minimizes internal consumption and extends the service life. The associated additional costs are usually amortized in a short time. The focal points include Determination/measurement monitoring of the load profile as a replacement for the fixed determination of the load centre of gravity from the theoretical connected load, the selection of the location of the main feed-in, the permanent optimization analyses of components if necessary and the documentation of the feed-in/transfer point. Due to the increased integration of digital technology, the safety risks to be managed are also growing.

Standard: A publicly accessible technical requirement or rule without legal status on a specific subject or subject area at national or international level. As a generally recognized, binding standard that must be observed and never violated, it represents the state of the art. With legal significance, it conveys the current technical and scientific level in a legal dispute as a binding source of knowledge.