To investigate possible increase in extrasystoles of workers when they are exposed to strong 50 Hz electromagnetic fields in their real-life working enviroment.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
50 Hz
Exposure duration:
30 min
|
|
|
Exposure 2:
50 Hz
Exposure duration:
30 min
|
|
|
Exposure 3:
50 Hz
Exposure duration:
30 min
|
|
|
Exposure 4:
50 Hz
Exposure duration:
30 min
|
|
| Frequency | 50 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 30 min |
| Exposure source |
|
|---|---|
| Setup | Male volunteers walked 1 km along the road under the transmission line. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 16.5 V/cm | minimum | measured | - | - |
| electric field strength | 1.72 kV/m | mean | measured | - | - |
| electric field strength | 1.75 kV/m | maximum | measured | - | - |
| magnetic flux density | 1.1 µT | minimum | measured | - | - |
| magnetic flux density | 157 µT | mean | measured | - | - |
| magnetic flux density | 1.85 µT | maximum | measured | - | - |
| Frequency | 50 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 30 min |
| Exposure source |
|
|---|---|
| Setup | Male volunteers walked 1 km along the road under the transmission line. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 442 V/m | minimum | measured | - | - |
| electric field strength | 4.6 kV/m | mean | measured | - | - |
| electric field strength | 4.9 kV/m | maximum | measured | - | - |
| magnetic flux density | 4.2 µT | minimum | measured | - | - |
| magnetic flux density | 5.8 µT | mean | measured | - | - |
| magnetic flux density | 7.07 µT | maximum | measured | - | - |
| Frequency | 50 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 30 min |
| Exposure source |
|
|---|---|
| Setup | Male volunteers walked 1 km along the road under the transmission line. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 27 V/cm | minimum | measured | - | - |
| electric field strength | 3.05 kV/m | mean | measured | - | - |
| electric field strength | 3.15 kV/m | maximum | measured | - | - |
| magnetic flux density | 1.56 µT | minimum | measured | - | - |
| magnetic flux density | 3.04 µT | mean | measured | - | - |
| magnetic flux density | 4.49 µT | maximum | measured | - | - |
| Frequency | 50 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 30 min |
| Exposure source |
|
|---|---|
| Setup | Transmission line workers walked 1 km along the road under the transmission line. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| electric field strength | 140 V/m | minimum | measured | - | - |
| electric field strength | 3.44 kV/m | mean | measured | - | - |
| electric field strength | 10.21 kV/m | maximum | measured | - | - |
| magnetic flux density | 1.02 µT | minimum | measured | - | - |
| magnetic flux density | 4.87 µT | mean | measured | - | - |
| magnetic flux density | 15.53 µT | maximum | measured | - | - |
Analysis of ECG recordings showed that extrasystoles or arrhythmias were as frequent outside the field as in the field. In some cases a small decrease in heart rate was observed after field exposure.
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