Substation - Substation 5131, Vasilopoullos Court
On the 14th of April 2006 at 11:00 am, magnetic field measurements were performed for Substation 5131. The substation of interest is located in the basement of Vasilopoullos Court on Strovolos avenue in Nicosia.
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The substation is rated at a nominal power of 1000 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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160A |
170A |
160A |
Table 1: Measured load current
The resultant load of all three phases was 12% 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
The obtained results for the RMS fields inside and outside the substation are shown in tables 3 and 4 respectively and a comparison is made with the ICNIRP recommendations.
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Substation 5131 Vasilopoullos: Fields Inside Substation |
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Distance from Side (m) |
Maximum Magnetic Field (µT) at Z Height (m) |
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0.3m |
ICNIRP % |
1 m |
ICNIRP % |
1.75 m |
ICNIRP % |
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Inside SubStation Field Measurements (Distance from Front Inside Wall) |
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0m from Front Side |
2.19 |
0.44% |
2.72 |
0.54% |
2.15 |
0.43% |
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0.5m from Front Side |
10.51 |
2.10% |
20.37 |
4.07% |
14.26 |
2.85% |
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1m from Front Side |
13.42 |
2.68% |
24.53 |
4.91% |
17.81 |
3.56% |
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1.5m from Front Side |
80.51 |
16.10% |
344.59 |
68.92% |
239.13 |
47.83% |
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2m from Front Side |
164.50 |
32.90% |
90.61 |
18.12% |
49.07 |
9.81% |
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2.5m from Front Side |
82.86 |
16.57% |
241.68 |
48.34% |
19.79 |
3.96% |
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3m from Front Side |
153.61 |
30.72% |
159.54 |
31.91% |
63.84 |
12.77% |
Table 3: Maximum field measurements inside Substation 5131
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Substation 5131 Vasilopoullos: Fields outside the Substation |
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Distance from Side (m) |
Maximum Magnetic Field (μT) at Z Height (m) |
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0.3m |
ICNIRP % |
1 m |
ICNIRP % |
1.75 m |
ICNIRP % |
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SubStation Front Side Field Measurements |
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0m from Front Side |
-- |
-- |
0.93 |
0.93% |
-- |
-- |
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1m from Front Side |
-- |
-- |
0.21 |
0.21% |
-- |
-- |
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Substation Left Side Field Measurements (EAC Room) |
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In front of |
-- |
-- |
72.5 |
72.5% |
-- |
-- |
Table 4: Maximum field measurements outside Substation 5131
Parking area / office above Substation 5131
The parking area and office of Vasilopoullos Court are situated above Substation 5131, on the right side when facing the Vasilopoullos building.
Field measurements for this apartment were performed on the 14th of April 2006 at 12:00pm.
The obtained results for the RMS magnetic fields inside the referenced parking area and office are shown in table 5 and a comparison is made with the ICNIRP recommendations.
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Parking area / office above SS 5131: Maximum 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 % |
1 m |
ICNIRP % |
1.75 m |
ICNIRP % |
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Parking Area Field Measurements from Left Side of Parking Area (above Substation) |
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0m from Left Side |
0.84 |
0.84% |
0.50 |
0.50% |
0.41 |
0.41% |
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1m from Left Side |
1.31 |
1.31% |
0.67 |
0.67% |
0.43 |
0.43% |
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2m from Left Side |
1.54 |
1.54% |
0.66 |
0.66% |
0.41 |
0.41% |
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3m from Left Side |
1.36 |
1.36% |
0.57 |
0.57% |
0.34 |
0.34% |
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Office Inside Field Measurements from Office Front Side |
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0m from Front Side |
-- |
-- |
0.30 |
0.30% |
-- |
-- |
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1m from Front Side |
-- |
-- |
0.26 |
0.26% |
-- |
-- |
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3m from Front Side |
-- |
-- |
0.16 |
0.16% |
-- |
-- |
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5m from Front Side |
-- |
-- |
0.15 |
0.15% |
-- |
-- |
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7m from Front Side |
-- |
-- |
0.19 |
0.19% |
-- |
-- |
Table 5: Maximum field measurements in the parking area and office above Substation 5131