Substation - Substation 3262, Exinta Skales
On the 17th of February 2006 at 11:30 am, electric and magnetic field measurements were performed for Substation 3262 Exinta Skales. The substation of interest is located on the ground floor of Rita Court 27 Apartments, Zakynthou street in Nicosia.
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The substation is rated at a nominal power of a 1000 KVA but the maximum observed values during the year are not usually greater than 800KVA.
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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350A |
310A |
280A |
Table 1: Measured load current
The resultant load of all three phases was 22.5% 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 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 3262 Exinta Skales: Fields inside the substation
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Field Description |
Position at height 1.75m |
Value |
ICNIRP |
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Magnetic Field (µT) |
In front of RMU at a distance of 0m |
5.3 |
1.06% |
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n front of LV Pillar at a distance of 0m |
192 |
38.40% |
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In front of LV Pillar at a distance of 1m |
23.8 |
4.76% |
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In front of Transformer at a distance of 0m |
123 |
24.60% |
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Electric Field (V/m) |
In the middle of the room |
8.1 |
0.08% |
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In front of LV Pillar |
78.41 |
0.78% |
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Table 3: Fields inside the substation
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Substation 3262 Exinta Skales: 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 |
2.964 |
2.96% |
3.193 |
3.19% |
1.778 |
1.78% |
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1m from front side |
0.7958 |
0.80% |
0.7055 |
0.71% |
0.5271 |
0.53% |
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2m from dront side |
0.5354 |
0.54% |
0.5536 |
0.55% |
0.4743 |
0.47% |
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Substation Left Side Field Measurements |
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0m from left side |
1.2932 |
1.29% |
1.5585 |
1.56% |
1.3618 |
1.36% |
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1m from left side |
0.5298 |
0.53% |
0.5673 |
0.57% |
0.5724 |
0.57% |
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2m from left side |
0.4587 |
0.46% |
0.2889 |
0.29% |
0.2781 |
0.28% |
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Substation Right Side Field Measurements |
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0m from right side |
29.641 |
29.64% |
24.092 |
24.09% |
5.9521 |
5.95% |
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1m from right side |
4.3889 |
4.39% |
4.8538 |
4.85% |
2.5016 |
2.50% |
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Substation Back Side Field Measurements |
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0m from back side |
0.6143 |
0.61% |
1.4451 |
1.45% |
1.8925 |
1.89% |
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1m from back side |
0.6441 |
0.64% |
0.5563 |
0.56% |
0.6262 |
0.63% |
Table 4: Fields outside the substation
Apartment 101
Apartment 101 is situated on the first floor of Rita Court 27, directly above Substation 3262 Exinta Skales, at Zakynthou street in Nicosia. Field measurements for this apartment were performed on the 17th of February 2006 at 10:00 am.
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Apartment 101 Measured Fields |
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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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Master Bedroom |
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0.5m from Left Side |
0.264 |
0.26% |
0.114 |
0.11% |
0.086 |
0.09% |
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0.5m from Right Side |
0.128 |
0.13% |
0.238 |
0.24% |
0.084 |
0.08% |
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Bedroom 1 |
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0.5m from Left Side |
0.420 |
0.42% |
0.166 |
0.17% |
0.125 |
0.13% |
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0.7m from Right Side |
0.1555 |
0.16% |
0.112 |
0.11% |
0.0668 |
0.07% |
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Kitchen |
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0.8m from Left Side |
0.8467 |
0.85% |
0.3451 |
0.35% |
0.2035 |
0.20% |
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Living Room - Corridor |
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Parallel to Side wall |
0.2061 |
0.21% |
0.1656 |
0.17% |
0.1325 |
0.13% |
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Along the Center |
0.2171 |
0.22% |
0.1823 |
0.18% |
0.1925 |
0.19% |
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Corridor 0.5m Side wall |
0.4922 |
0.49% |
0.3028 |
0.30% |
0.3459 |
0.35% |
Table 5: Apartment 101 Rita Court field measurements