What is PD CLC/TR 50627- Electromagnetic Interference between Electrical Equipment/Systems Below 150 kHz about?
PD CLC/TR 50627 is a safety standard on electrical equipment/systems in the frequency range below 150 kHz.
PD CLC/TR 50627 is based on two Study Reports of CLC/SC 205A, having been worked out by their Task Force EMI [1a] [1b] and provides the results and findings of the documents. PD CLC/TR 50627 was created with the help and input from a broad range of involved stakeholders such as network operators, equipment manufacturers, universities, accredited test houses, and consultants.
Besides the actual standardization situation, PD CLC/TR 50627 reflects the current emission situation found in supply networks and installations and describes electromagnetic interference (EMI) cases from twelve countries; investigation and analysis of the latter show a wide range of diverse types of electrical devices to be considered as a source or a victim of related EMI.
PD CLC/TR 50627 highlights the occurrence of elevated levels of non-intentional emissions (NIE) in the considered frequency range, including values up to and exceeding the standardized limits for intentional signals from mains communicating systems (MCS), which also implies a high potential to cause EMI to other electrical equipment. On the other hand, several types of equipment show susceptibility to related emissions, being insufficiently immune.
PD CLC/TR 50627 addresses the following:
- Several diverse types of electrical equipment are generating such emissions and/or are susceptible, to such, thus representing EMI potential, as a source or a victim of such EMI
- The interaction of electrical equipment in a certain supply area respectively installation, with its complex and volatile impedance character, as having an additional EMI potential; that besides NIE from general electrical equipment and signals from MCS and technically being quite different from emissions
- The fact that besides the conducted interference also radiated interference from NIE or signals from MCS, through the magnetic H-field following to related currents on the mains, is to be considered, which is of some importance also for the interference-free operation of broadcast time-signal systems or electronic circuits controlled by such
- The ageing of electronic components in electric equipment, which causes increased emissions and EMI to other electrical equipment because of not showing the same EMC characteristics as before being placed on the market, therefore no longer being able to conform with EMC requirements
- The additional aspect of differential mode operation, which should be considered for related immunity and testing specifications
These findings confirm that EMI in this frequency range is not limited to single types of equipment like inverters or MCS; instead, a more general electromagnetic compatibility (EMC) problem concerning a larger spectrum of electrical equipment is identified.
Who is PD CLC/TR 50627- Electromagnetic Interference between Electrical Equipment/Systems Below 150 kHz for?
PD CLC/TR 50627 on electrical equipment/systems in the frequency range below 150 kHz is relevant to:
- Manufacturers of electrical equipment/systems
- Network operators
- Universities
- Accredited test houses and testing authorities
- Consultants
- Electromagnetic engineers
- Mechanical engineers
- Electrical engineers
- Electricians
- Network users
- Deliverers
Why should you use PD CLC/TR 50627- Electromagnetic Interference between Electrical Equipment/Systems Below 150 kHz?
PD CLC/TR 50627 aims at:
- Highlighting the broad relevance of recognized electromagnetic interference for safeguarding EMC also in the frequency range 2 kHz – 150 kHz
Extending knowledge about EMI cases having been observed between electrical equipment in the frequency range 2 kHz to 150 kHz, with an emphasis on interference between:
- Electrical equipment and its non-intentional emissions (NIE)
- Mains communicating systems (MCS) using (powerline communication) PLC technology with intentional signal injection for the transmission of information over the electricity supply network
- Different mechanisms causing interference to electrical equipment due to non-intentional or intentional voltage/current components in the considered frequency range
As a basis for evaluating the need for closing the recognized gap in standardization as highlighted in the first edition, and considering the recent developments; that:
- Without evaluating certain types of electrical equipment concerning applied technology or priority
And about:
- Problems having occurred with the operational equipment of distribution network operators (DNOs) related to smart metering and smart grids control and monitoring equipment
- Complaints by network users to deliverers and subsequently by deliverers to DNOs or by network users directly to their DNO, about degradation or loss of function of certain electrical equipment
- In both cases, network users, as well as deliverers, are primarily annoyed by the troubles they are experiencing with electrical equipment they have traded or bought, trusting in its interference-free operability, which they expect due to the CE mark
PD CLC/TR 50627 is based on:
- Reports on EMI cases and, following related complaints, investigations performed by an accredited test house, universities, DNOs, manufacturers, and consultants
Measurements performed by an accredited test house, universities, DNOs, manufacturers and consultants. In both cases to extend knowledge of emissions from different equipment in the considered frequency range, in case of the occurrence of EMI:
- To identify the actual interference source
- To clarify the interference mechanism
- To evaluate mitigation measures
- The present standardization situation and its actual development
Overall, PD CLC/TR 50627 is useful as it aims at catalysing progress in areas where energy production, distribution and use, mobility and transport, and information and communication technologies (ICT) are intimately interlinked and offer new interdisciplinary opportunities to improve services that about the global energy situation which, exceeding the primary and basic goal of supplying electrical energy by far, requires measures for ensuring future-proof energy.
