Substation - Substation Choletrin, Residence 9 Vladimirou Kafkaridi Street
The measurements were performed on the 19th December 2014 at 10:00 a.m during clear weather conditions. The EMF measurements were performed for the residence, Vladimirou Kafkaridi Street and substation Choletrin in Strovolos, Nicosia.
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Limiting exposure values have been provided by the ICNIRP recommendations and are guidelines to many countries and organisations. The exposure limits at 50 Hz are tabulated in the following table according to the limits given by ICNIRP.
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Reference levels for Occupational exposure ICNIRP |
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Frequency |
Electric Field Strength, E (V/m) |
Magnetic Field Strength, H (A/m) |
Magnetic Flux Density, B (µT) |
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50 Hz |
10000 |
400 |
500 |
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Reference levels for General Public exposure ICNIRP |
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Frequency |
Electric Field Strength, E (V/m) |
Magnetic Field Strength, H (A/m) |
Magnetic Flux Density, B (µT) |
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50 Hz |
5000 |
80 |
100 |
Table 1: ICNIRP exposure limits for Occupational and General public exposure
The substation is rated at a nominal power of 500 KVA. At the time when the measurements were performed the substation load was recorded as:
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Red Phase |
Yellow Phase |
Blue Phase |
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40A |
50A |
50A |
Table 2: Measured load current
From the resultant load of all three phases as shown above we note that the load is only 6.44 % of the nominal load (500 KVA Transformer).It must therefore be noted that during the summer or in periods of peak load this will directly affect and produce an increase to the electric and magnetic fields.
The highest magnetic eld measurement was observed at the right side of the substation, 0 m away from the substation starting point and at a height of 0.3 m. The measured value at this point was 0.502µT and a persentage of 0.502% as compared to the INCIRP General Public stantard.
A detailed description of the maximum measured magnetic fields in the area under investigation, outside the substation, is shown in the following table.
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Magnetic Field Measurements |
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Distance from Side /m |
Maximum Magnetic Field (μT) at Z Height (m) |
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0.3m |
ICNIRP % |
1m |
ICNIRP % |
1.75m |
ICNIRP % |
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Substation right side - Mesh - Maximum values per line |
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M.L. 0m away from Substation right side |
0.502 |
0.502% |
0.249 |
0.249% |
0.159 |
0.159% |
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M.L. 1m away from Substation right side |
0.237 |
0.237% |
0.190 |
0.190% |
0.123 |
0.123% |
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M.L. 2m away from Substation right side |
0.135 |
0.135% |
0.095 |
0.095% |
0.064 |
0.064% |
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Substation back side - Mesh - Maximum values per line |
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M.L. 0m away from Substation back side |
0.287 |
0.287% |
0.220 |
0.220% |
0.124 |
0.124% |
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M.L. 1m away from Substation back side |
0.210 |
0.210% |
0.099 |
0.099% |
0.096 |
0.096% |
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M.L. 2m away from Substation back side |
0.276 |
0.276% |
0.074 |
0.074% |
0.059 |
0.059% |
Table 3: Maximum Magnetic Field Measurements.
A detailed description of the maximum measured magnetic fields in the area under investigation, inside the residence, is shown in the following table.
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Magnetic Field Measurements |
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Distance from Side /m |
Maximum Magnetic Field (μT) at Z Height (m) |
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0.3m |
ICNIRP % |
1m |
ICNIRP % |
1.75m |
ICNIRP % |
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Residence - Kitchen |
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Measurement Point A |
-- |
-- |
0.053 |
0.053% |
-- |
-- |
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Residence - Sitting room |
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Measurement Point B |
-- |
-- |
0.032 |
0.032% |
-- |
-- |
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Residence - Bedroom 1 |
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Measurement Point C |
-- |
-- |
0.057 |
0.057% |
-- |
-- |
| Residence - Bedroom 2 | ||||||
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Measurement Point D |
-- |
-- |
0.035 |
0.035% |
-- |
-- |
Table 4: Maximum Magnetic Field Measurements.
The highest electric field measurement was observed inside bedroom 2 at a height of 1 m. The measured value at this point was 4.494 V/m and a percentage of 0.090 % as compared to ICNIRP General Public standard. A detailed description of the maximum measured electric fields in the area under investigation, inside the residence, is shown in the following table.
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Electric Field Measurements |
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Measurement Point |
Maximum Electric Field (V/m) at Z Height /m - Percentage of ICNIRP General Public Standard /% |
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0.3m |
ICNIRP % |
1m |
ICNIRP % |
1.75m |
ICNIRP % |
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Substation right side - maximum values per line |
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Measurement Point A |
-- |
-- |
0.709 |
0.014% |
-- |
-- |
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Substation back side - maximum values per line |
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Measurement Point B |
-- |
-- |
0.787 |
0.016% |
-- |
-- |
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Residence - Kitchen |
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Measurement Point A |
-- |
-- |
0.858 |
0.017% |
-- |
-- |
| Residence - Sitting room | ||||||
| Measurement Point B | -- | -- | 1.104 | 0.022% | -- | -- |
| Residence - Bedroom 1 | ||||||
| Measurement Point C | -- | -- | 0.825 | 0.017% | -- | -- |
| Residence - Bedroom 2 | ||||||
| Measurement Point D | -- | -- | 4.494 | 0.090% | -- | -- |
Table 5: Electric Field Measurements.