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eLibrary > 23/30453812 DC BS EN IEC 62271-208. High-voltage switchgear and controlgear - Part 208. Methods to quantify the steady state, power-frequency electromagnetic fields generated by HV switchgear assemblies and HV/LV prefabricated substations >

23/30453812 DC BS EN IEC 62271-208. High-voltage switchgear and controlgear - Part 208. Methods to quantify the steady state, power-frequency electromagnetic fields generated by HV switchgear assemblies and HV/LV prefabricated substations, 2023

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23/30453812 DC BS EN IEC 62271-208. High-voltage switchgear and controlgear - Part 208. Methods to quantify the steady state, power-frequency electromagnetic fields generated by HV switchgear assemblies and HV/LV prefabricated substations, 2023

17C_893e_CD.pdf [Go to Page]
1 Scope
2 Normative references
3 Terms and definitions
4 Evaluation requirements [Go to Page]
4.1 General
4.2 Methods of evaluation
4.3 Evaluation of electric fields [Go to Page]
4.3.1 HV switchgear assemblies
4.3.2 HV/LV prefabricated substations
4.4 Evaluation of magnetic fields [Go to Page]
4.4.1 HV switchgear assemblies
4.4.2 HV/LV prefabricated substations
5 Measurements [Go to Page]
5.1 General
5.2 Measuring instruments
5.3 Measurement procedures [Go to Page]
5.3.1 General
5.4 Hot-spot measurement procedure [Go to Page]
5.4.1 Electric field
5.4.2 Magnetic field
5.4.3 Background fields
5.4.4 Environmental factors [Go to Page]
5.4.4.1 Electric field measurement
5.4.4.2 Magnetic field measurement
5.4.4.3 Other conditions
5.5 Isoline measurement procedure [Go to Page]
5.5.1 General
5.5.2 Measurement height(s)
5.5.3 Intervals between measurement points
5.5.4 Background fields
5.5.5 Environmental factors
5.6 Measurement set-up [Go to Page]
5.6.1 General
5.6.2 Hot spot measurement set-up
5.6.3 Isoline measurement set-up
5.6.4 External connections
5.6.5 Additional provisions for HV/LV prefabricated substations [Go to Page]
5.6.5.1 Electric field
5.6.5.2 Magnetic field
6 Calculations [Go to Page]
6.1 General
6.2 Software
6.3 Calculation procedures
6.4 Results
6.5 Validation
7 Documentation [Go to Page]
7.1 Characteristics of the HV switchgear assembly or prefabricated substation
7.2 Evaluation method
7.3 Presentation of the measurement results
7.4 Presentation of the calculation results
Annex A (informative) Presentation of E or B field measurement data – Examples for a typical HV/LV prefabricated substation [Go to Page]
A.1 Presentation of Hot-spot B-field measurement results [Go to Page]
A.1.1 Hot spot locations
A.1.2 Hot spot locations with its E or B field values
A.1.3 Variation of the E or B field as a function of the distance
A.1.4 Field variation around substation at hot spot locations
A.1.5 Background fields
A.2 Presentation of Isoline B-field measurement results [Go to Page]
A.2.1 Location of measurement points on Isoline
A.2.2 Background fields [Go to Page]
A.2.3 Example of an Isoline measurement on a 250kVA transformer substation
Annex B (informative) Examples of analytical solutions to benchmark EMF calculations [Go to Page]
B.1 Magnetic field
B.2 Electric field [Go to Page]

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23/30453812 DC BS EN IEC 62271-208. High-voltage switchgear and controlgear - Part 208. Methods to quantify the steady state, power-frequency electromagnetic fields generated by HV switchgear assemblies and HV/LV prefabricated substations, 2023

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