ДСТУ EN 61786-1:2022 Измерение постоянного магнитного, переменного и переменного электрических полей от 1 Гц до 100 кГц с учетом облучения людей. Часть 1. Требования к измерительным приборам (EN 61786-1:2014,...

ДСТУ EN 61786-1:2022
(EN 61786-1:2014, IDT; IEC 61786-1:2013, IDT)

Вимірювання постійного магнітного, змінного магнітного та змінного електричних полів від 1 Гц до 100 кГц з огляду на опромінення людей.
Частина 1. Вимоги до вимірювальних приладів

 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

1 Scope

2 Normative references

3 Terms and definitions

3.1 Meters

3.2 Meter characteristics

3.3 Field characteristics

3.4 Measurements

4 Symbols

5 Instrumentation specifications

5.1 General

5.2 Measurement uncertainty

5.3 Magnitude range

5.4 Pass-band

5.5 Operating temperature and humidity ranges

5.6 Power supplies

5.7 Readability of scale

5.8 Instrument dimensions and choice of probe

5.8.1 General schema

5.8.2 Magnetic field meter

5.8.3 Electric field meter

5.8.4 Support for electric field meter

5.9 Electromagnetic compatibility

5.9.1 Immunity

5.9.2 Emissions

5.10 Crest factor

5.11 Durability

5.12 Weight

5.13 Instrumentation choice

6 Calibration

6.1 General

6.2 Calibration procedure

6.2.1 General

6.2.2 Magnetic field calibration system

6.2.3 Electric field calibration system

6.2.4 Three-axis probes calibration

6.2.5 Calibration values

6.2.6 Calibration uncertainty

6.3 Calibration documentation

7 Verification

Annex A (normative) Calibration methods

Annex B (informative) Example of calibration uncertainty

Annex C (informative) General characteristics of magnetic and electric fields

Annex D (informative) Magnetic flux density meters (magnetic field meters)

Annex Е (informative) Electric field strength meters (electric field meters)

Annex F (informative) Influence of humidity on electric field measurement

Annex G (informative) Units

Bibliography

Figure 1 - Schema of a field meter

Figure 2 - Insulating tripod and offset rod for an electric field probe (photograph RTE)

Figure 3 - Electric field measurement using a hand-held stick (photograph RTE)

Figure A.1 - Deviation in percentage departure of calculated axial field [7]

Figure A.2 - Coordinate system and geometry of rectangular loop of many turns of wire (see Equation (A. 1))

Figure A.3 - Circular Helmholtz coils

Figure A.4 - Deviation in percentage of calculated B₇ from centre value (see Equation (A.4))

Figure A.5 - Schematic view of a circuit for calibration of magnetic field meter using a square loop to produce a known field

Figure A.6 - Diagram for voltage injection technique

Figure A.7 - Calculated normalized electric field at plate surfaces and midway between plates as a function of the normalized distance from the edge of the plate

Figure A.8 - Parallel plates system for calibrating free-body electric field meters

Figure A.9 - Arrangement with parallel plates orientated perpendicular to the floor

Figure A.10 - Diagram for current injection technique

Figure C.1 — Oscillating and rotating field quantities for cases of elliptical polarization, linear polarization, and circular polarization

Figure C.2 - Magnetic field from current in straight and circular conductors

Figure C.3 - Perturbation of electric field distribution by a person (from IEC 62226-3-1)

Figure C.4 - Proximity effect with a 25 kV line and a building (from IEC 62110)

Figure D.1 - Schematic view of simple magnetic field meter with coil-type probe

Figure D.2 - Approximate equivalent circuit of a coil probe when connected to the detector

Figure E.1 - Single-axis free-body meter geometries

Figure E.2 - Designs for flat plate probes used with ground-referenced electric field meters

Figure F.1 - Test in the climatic chamber with the normal tripod (left) and the offset tripod (right) (photograph EDF R&D)

Figure F.2 - E field measured as a function of the humidity with a normal tripod

Figure F.3 - E field measured as a function of the humidity with an offset tripod

Table 1 - Mains terminal disturbance voltage limits for class В group 1 equipment measured on a test site

Table A.1 - Calculated normalized electric field values midway between plates and at plate surfaces

Table B.1 - Example of uncertainty calculation