Substation - Substation 3864, SPE Strovolou
On the 6th of February 2007 at 9:00 am magnetic field measurements were performed for Substation 3864 SPE Strovolou. The substation of interest is located on the ground floor of the Nikaia 65 Court Building, Prodromou Street in Nicosia.
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The substation is rated at a nominal power of 800 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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430A |
480A |
390A |
Table 1: Measured load current
The resultant load of all three phases was 39% 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 3864 SPE Strovolou: 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 |
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0m from Front Side |
1,42 |
0,28% |
1,56 |
0,31% |
1,36 |
0,27% |
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0.5m from Front Side |
2,56 |
0,51% |
2,68 |
0,54% |
2,47 |
0,49% |
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1m from Front Side |
30,32 |
6,06% |
11,36 |
2,27% |
6,89 |
1,38% |
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1.5m from Front Side |
22,98 |
4,60% |
136,78 |
27,36% |
14,84 |
2,97% |
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2m from Front Side |
78,85 |
15,77% |
333,44 |
66,69% |
41,06 |
8,21% |
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2.5m from Front Side |
490,72 |
98,14% |
247,05 |
49,41% |
107,28 |
21,46% |
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3m from Front Side |
252,03 |
50,41% |
196,17 |
39,23% |
245,28 |
49,06% |
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3.5m from Front Side
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31,06 |
6,21% |
45,31 |
9,06% |
20,15 |
4,03% |
Table 3: Maximum field measurements inside Substation 3864
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Substation 3864 SPE Strovolou: Fields Outside 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 |
0,53 |
0,53% |
0,46 |
0,46% |
0,38 |
0,38% |
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1m from Front Side |
0,45 |
0,45% |
0,20 |
0,20% |
0,18 |
0,18% |
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Substation Right Side Field Measurements |
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0m from Right Side |
22,52 |
22,52% |
50,25 |
50,25% |
12,08 |
12,08% |
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1m from Right Side |
2,69 |
2,69% |
3,15 |
3,15% |
2,41 |
2,41% |
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2m from Right Side |
1,19 |
1,19% |
1,21 |
1,21% |
0,84 |
0,84% |
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Substation Back Side Field Measurements
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0m from Back Side |
4,05 |
4,05% |
6,77 |
6,77% |
4,59 |
4,59% |
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1m from Back Side |
0,70 |
0,70% |
1,05 |
1,05% |
0,76 |
0,76% |
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2m from Back Side |
0,25 |
0,25% |
0,27 |
0,27% |
0,24 |
0,24% |
Table 4: Maximum field measurements outside Substation 3864
Apartment M2 / Apartment above Substation 3864
Apartment M2 of Nikaia 65 Court Nicosia is situated at the first floor of the building, directly above Substation 3864 SPE Strovolou, at Prodromou Street Nicosia.
Field measurements for this apartment were performed on the 2nd of March 2007 at 11:00am.
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The obtained results for the RMS magnetic fields inside the referenced apartment are shown in table 5 and a comparison is made with the ICNIRP recommendations.
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Apartment M2: Inside 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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Apartment Inside Field Measurements from Left Side Wall of Bedroom 1 |
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0m from Left Wall |
0,68 |
0,68% |
0,28 |
0,28% |
0,45 |
0,45% |
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0.5m from Left Wall |
0,59 |
0,59% |
0,33 |
0,33% |
0,16 |
0,16% |
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1m from Left Wall |
0,56 |
0,56% |
0,28 |
0,28% |
0,17 |
0,17% |
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1.5m from Left Wall |
0,28 |
0,28% |
0,26 |
0,26% |
0,15 |
0,15% |
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2m from Left Wall |
0,24 |
0,24% |
0,22 |
0,22% |
0,15 |
0,15% |
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2.5m from Left Wall |
0,24 |
0,24% |
0,20 |
0,20% |
0,15 |
0,15% |
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3m from Left Wall |
0,62 |
0,62% |
0,22 |
0,22% |
0,16 |
0,16% |
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Apartment Inside Field Measurements from Right Side Wall of Kitchen |
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0m from Right Wall |
0,81 |
0,81% |
0,35 |
0,35% |
0,35 |
0,35% |
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0.5m from Right Wall |
0,80 |
0,80% |
0,30 |
0,30% |
0,17 |
0,17% |
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1m from Right Wall |
1,19 |
1,19% |
0,40 |
0,40% |
0,15 |
0,15% |
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21.5m from Right Wall |
1,01 |
1,01% |
0,42 |
0,42% |
0,19 |
0,19% |
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2m from Right Wall |
0,79 |
0,79% |
0,32 |
0,32% |
0,17 |
0,17% |
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Apartment Inside Field Measurements Centre of Corridor
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Centre of Room |
0.97 |
0.97% |
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Apartment Inside Field Measurements Centre of Entrance Hall
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Centre of Room |
0.27 |
0.27% |
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Apartment Inside Field Measurements Centre of Living Room
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Centre of Room |
0.08 |
0.08% |
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Apartment Field Measurements Centre of Veranda
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Centre of Room |
0.15 |
0.15% |
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Table 5: Maximum field measurements in the apartment above Substation 3864