Substation - Substation SEK-PEO, Filoktiti Street
The measured plot is located on Filoktiti Street in Nicosia. The measurements were performed on the 3rd of June 2008 at 09:00 am. Substation SEK-PEO is situated at a distance of 115 m from the investigated plot.
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Figure 1: Plot in Filoktiti Street |
Figure 2: Sek - Peo Substation |
The substation is rated at a nominal power of 200 KVA. At the time when the measurements were performed, the substation load power was recorded as:
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Red Phase |
Yellow Phase |
Blue Phase |
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50A |
45A |
25A |
Table 1: Measured load current
The resultant load of all three phases was 14.4% utilization of the nominal load current.
Limiting exposure values have been provided by the ICNIRP recommendations and are guidelines to many countries and organizations. 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 2: ICNIRP Exposure limits for Occupational and General Public exposure
A detailed description of the maximum measured magnetic fields in the outside area is shown in the following table.
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Outside Field Measurements |
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Distance from Side /m |
Maximum Magnetic Field 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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Plot Field Measurements |
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0m |
0.0092 |
0.01% |
0.0082 |
0.01% |
0.0081 |
0.01% |
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3m |
0.0081 |
0.01% |
0.0088 |
0.01% |
0.0080 |
0.01% |
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6m |
0.0090 |
0.01% |
0.0092 |
0.01% |
0.0085 |
0.01% |
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9m |
0.0091 |
0.01% |
0.0098 |
0.01% |
0.0098 |
0.01% |
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12m |
0.0096 |
0.01% |
0.0100 |
0.01% |
0.0093 |
0.01% |
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15m |
0.0094 |
0.01% |
0.0102 |
0.01% |
0.0098 |
0.01% |
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18m |
0.0103 |
0.01% |
0.0103 |
0.01% |
0.0100 |
0.01% |
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21m |
0.0108 |
0.01% |
0.0108 |
0.01% |
0.0109 |
0.01% |
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24m |
0.0087 |
0.01% |
0.0095 |
0.01% |
0.0091 |
0.01% |
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27m |
0.0089 |
0.01% |
0.0099 |
0.01% |
0.0092 |
0.01% |
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Substation Front Side |
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0m |
1.8587 |
1.86% |
1.6360 |
1.64% |
1.1090 |
1.11% |
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1m |
0.2391 |
0.24% |
0.2315 |
0.23% |
0.2039 |
0.20% |
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2m |
0.0798 |
0.08% |
0.0913 |
0.09% |
0.1590 |
0.16% |
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Substation Left Side |
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0m |
0.0431 |
0.04% |
0.0610 |
0.06% |
0.0710 |
0.07% |
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1m |
0.0253 |
0.03% |
0.0266 |
0.03% |
0.0249 |
0.02% |
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2m |
0.0308 |
0.03% |
0.0319 |
0.03% |
0.0375 |
0.04% |
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Substation Back Side |
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0m |
0.0937 |
0.09% |
0.1141 |
0.11% |
0.1713 |
0.17% |
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1m |
0.0414 |
0.04% |
0.0439 |
0.04% |
0.0385 |
0.04% |
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2m |
0.0285 |
0.03% |
0.0268 |
0.03% |
0.0236 |
0.02% |
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Substation Right Side |
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0m |
0.0431 |
0.04% |
0.0610 |
0.06% |
0.0710 |
0.07% |
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1m |
0.0253 |
0.03% |
0.0266 |
0.03% |
0.0249 |
0.02% |
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2m |
0.0308 |
0.03% |
0.0319 |
0.03% |
0.0375 |
0.04% |
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Field Measurements under the overhead power lines |
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0m |
0.0229 |
0.02% |
0.0190 |
0.02% |
0.0180 |
0.02% |
Table 3: Magnetic Field Measurements in the outside area
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Measurements at the edge of the plot at height 2.5 m |
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Measurement Point |
Maximum Magnetic Field at Z Height /m - Percentage of ICNIRP General Public Standard /% |
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0.3m |
ICNIRP % |
1m |
ICNIRP % |
2.5m |
ICNIRP % |
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Measurement Point A |
-- |
-- |
-- |
-- |
0.016 |
0.016% |
Table 4: Magnetic Field Measurements at the edge of the plot
Accordingly a detailed description of the maximum measured magnetic fields in the outside area is shown in the table below.
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Inside Field Measurements |
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Measurement Point |
Maximum Magnetic Field 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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Residence Bedroom |
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Measurement Point A |
-- |
-- |
0.015 |
0.015% |
-- |
-- |
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Measurement Point B |
-- |
-- |
0.046 |
0.046% |
-- |
-- |
Table 5: Magnetic Field Measurements of residence
The highest magnetic field measurement was observed in the outside area, at a distance of 0 m from the front side wall of Sek-Peo substation. The measured value at this point was 1.8587 µT and a percentage of 1.86% as compared to the ICNIRP General Public standards.
The Electric Field measured in the outside area was found to be 1.803 V/m and a percentage of 0.036 % as compared to the ICNIRP General Public standard. Additionally the Electric Field measured in the inside area was found to be 0.872 V/m and a percentage of 0.017 % as compared to the ICNIRP General Public standard.