Substation - Substation Zalongou, Residence 11 Lapathou Street, Strovolos
The measurements were performed on the 12th March 2012 at 05:00 p.m during clear weather conditions. The EMF measurements were performed for the residence 11 Lapathou Street, Strovolos and substation Zalongou" in 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 315 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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35 A |
20 A |
55 A |
Table 2: Measured Load Current when building was fully operating
From the resultant load of all three phases as shown above we note that the load is only 8.03 % of the nominal load (315 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 field measurement was observed 2m away from the back corner of the substation - into the garden of the house, at the height of 0.30m. The measured value at this point was 0.267µT and the percentage of 0.267% as compared to the ICNIRP General Public Standard.
A detailed description of the maximum measured magnetic fields in the area of investigation is shown in the following table.
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Magnetic 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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Inside the living room |
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Measurement point |
-- |
-- |
0.091 |
0.091 |
-- |
-- |
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Inside the dinning room |
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Measurement point |
-- |
-- |
0.186 |
0.186 |
-- |
-- |
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Inside the sitting room |
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Measurement point |
-- |
-- |
0.153 |
0.153 |
-- |
-- |
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Inside the bedroom 1 |
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Measurement point |
-- |
-- |
0.107 |
0.107 |
-- |
-- |
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Inside the bedroom 2 |
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Measurement point |
-- |
-- |
0.126 |
0.126 |
-- |
-- |
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Inside the bedroom 3 |
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Measurement point |
-- |
-- |
0.164 |
0.164 |
-- |
-- |
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Inside the bedroom 4 |
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Measurement point |
-- |
-- |
0.103 |
0.103 |
-- |
-- |
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Inside the bathroom |
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Measurement point |
-- |
-- |
0.101 |
0.101 |
-- |
-- |
Table 3: Magnetic field measurements inside area
The highest electric field measurement was observed at the back corner of the substation - into the garden of the house, at the height of 1m. The measured value at this point was 0.649V/m and a percentage of 0.0138% as compared to the ICNIRP General Public Standard.
A detailed description of the maximum measured electric fields is shown in the following table.
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Electric Field Measurements |
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Distance from Side /m |
Maximum Electric 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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Measurement point |
-- |
-- |
0.694 |
0.014 |
-- |
-- |
Table 4: Maximum electric field measurements.