Planning with SIVACON 8 PS - Siemens

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Further information about planning7.6 Magnetic fields7.6 Magnetic fieldsGeneral informationDue to their physical characteristics, busbars designed for power distribution andtransmission generate pulsating electromagnetic fields in their vicinity with a fundamentalfrequency of 50 Hz. These magnetic fields can impair the ability of sensitive equipment suchas computers or metering instruments to function in full working order.LimitsEMC directives and the associated standards do not set out requirements orrecommendations for the planning of busbar trunking systems. DIN VDE 0100-710 can beconsulted in relation to busbar trunking systems used in hospitals.DIN VDE 0100-710 defines limits for line frequency magnetic fields in hospitals. Forexample, at 50 Hz, the magnetic induction around a patient's bed must not exceed thefollowing values:B= 2 x 10 -7 tesla for EEGB= 4 x 10 -7 tesla for ECGThe limit for inductive interference between multi-core cables and lines in a high voltageinstallation (conductor cross section > 185 mm 2 ) and the patient beds to be protected issignificantly undershot if the minimum clearance of 9 m recommended in DIN VDE 0100-710is complied with.When using busbars, this clearance can generally be reduced, since the busbar systems aredesigned to effectively reduce the magnetic interference fields in the local vicinity.Magnetic field measurementsHowever, in order to facilitate evaluation of the busbars to be used, extensive magnetic fieldmeasurements have been taken in accordance with EN 60439-2. The magnetic fieldemissions of the busbar systems were measured on a straight trunking run 9.0 m long. Withthe busbars under a balanced rated current load, the magnetic fields were measures in eightdirections at intervals of 0.1 m and up to a clearance of 1 m.Figure 7-9Coordinate system for magnetic field measurementPlanning with SIVACON 8 PS262 Planning Manual, 10/2007, A5E01541101-01
Further information about planning7.6 Magnetic fields Figure 7-10BD2 magnetic fields for systems Al 250 A, 400 A, 800 A, Cu 1250 A Figure 7-11 BD2 load distance profile for 0.2 μT of systems Al 250 A, 400 A, 800 A, Cu 1250 APlanning with SIVACON 8 PSPlanning Manual, 10/2007, A5E01541101-01 263
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Planning Manual · 10/2007Planning
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Safety GuidelinesThis manual contai
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Table of contents3.3 Technical data
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Table of contents6 Planning with LR
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Table of contentsPlanning with SIVA
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System overview1.1 Overview of Siem
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System overview1.1 Overview of Siem
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System overview1.2 CD-K systemConne
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System overview1.3 BD01 systemConne
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System overview1.4 Networked busbar
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Planning principles2.2 Busbar trunk
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Planning principles2.3 Rated curren
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Planning principles2.4 System selec
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Planning principles2.4 System selec
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Planning with BD2A/BD2C3.2 System c
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Planning with BD2A/BD2C3.4 Conducto
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Planning with BD2A/BD2C3.5 Dimensio
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Planning with LDA/LDC 44.1 System d
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Planning with LDA/LDC4.3 Technical
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Planning with LRC 66.1 System descr
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Planning with LRC6.2 System compone
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