Pole Mounted Transformer - 10 Nikou Belogianni Street, Agia Napa
The measured pole mounted transformer/residence is located in Nikou Belogianni street in Ayia Napa. The measurements were performed on the 21th of July 2010 at 12:30 pm.
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Figure 1:Pole mounted transformer “Photiou Clinic” |
Figure 2: Outside the residence – 2nd Veranda |
The pole mounted transformer is rated at a nominal power of 200 KVA. At the time when the measurements were performed the transformer load was recorded as:
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Red Phase |
Yellow Phase |
Blue Phase |
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48 A |
48 A |
58 A |
Table 1: Measured load current
From the resultant load of all three phases as shown above we note that the load is only 18 % of the nominal load (200 KVA Transformer).
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
The maximum obtained values are represented below and compared to the ICNIRP limits. The highest magnetic field inside was observed in the residence living room, with a value 0.237 μT and a percentage of 0.24 % as compared to the ICNIRP General Public standard.
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Magnetic Field Measurements |
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Measurement point /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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Measurements inside the residence - Living room |
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Measurement point A |
-- |
-- |
0.24 |
0.24% |
-- |
-- |
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Measurements inside the residence - Kitchen |
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Measurement point B |
-- |
-- |
0.07 |
0.07% |
-- |
-- |
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Measurements inside the residence - Veranda |
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Measurement point C |
-- |
-- |
0.18 |
0.18% |
-- |
-- |
Table 3: Magnetic Field Measurements inside area
Accordingly the highest magnetic field value outside was observed 2m away from the pole mounted transformer front side (1m from the starting point), with a value 0.215 μT and a percentage of 0.21 % as compared to the ICNIRP General Public standard. The following table summarizes the magnetic field values measured outside.
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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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Measurements outside the residence - 1st Veranda |
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Measurement point C |
-- |
-- |
0.18 |
0.18% |
-- |
-- |
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Pole mounted transformer - Front side |
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0m |
0.20 |
0.20% |
0.16 |
0.16% |
0.15 |
0.15% |
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1m |
0.17 |
0.17% |
0.14 |
0.14% |
0.16 |
0.16% |
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2m |
0.11 |
0.11% |
0.21 |
0.21% |
0.15 |
0.15% |
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Measurements outside the residence - 2nd Veranda |
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0m |
0.11 |
0.11% |
0.12 |
0.12% |
0.14 |
0.14% |
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1m |
0.12 |
0.12% |
0.11 |
0.11% |
0.12 |
0.12% |
Table 4: Magnetic Field Measurements outside area
Additionally, the highest electric field value inside and outside was observed directly in front of the pole mounted transformer “Photiou Clinic”, with a value 6.45 V/m and a percentage of 0.13 % as compared to the ICNIRP General Public standard. The following table summarizes the electric field values measured inside and outside.
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Inside and outside Field Measurements |
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Measurement point /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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Measurements outside the residence - 1st Veranda |
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Measurement point D |
-- |
-- |
0.74 |
0.01% |
-- |
-- |
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Measurements inside the residence - 2nd Veranda |
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Measurement point E |
-- |
-- |
5.68 |
0.11% |
-- |
-- |
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Measurements in front of pole mounted tranformer |
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Measurement point F |
-- |
-- |
-- |
-- |
6.45 |
0.13% |
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Measurement point G |
-- |
-- |
-- |
-- |
5.71 |
0.11% |
Table 5: Electric Field Measurements inside and outside area