The measured substation/apartment is located in the 13, Filellinon str. in Paralimni. The measurements were performed on the 1st of July 2008 at 9:30 am. Substation POLYMNIA is situated in the car park of the Polymnia Court.
The substation is rated at a nominal power of 200 KVA. At the time when the measurements were performed, the substation load power was recorded as:
|
Red Phase |
Yellow Phase |
Blue Phase |
|
139A |
77A |
85A |
Table 1: Measured load current
The resultant load of all three phases was 36.1% 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.
|
Reference levels for Occupational exposure ICNIRP |
|||
|
Frequency |
Electric Field Strength, E (V/m) |
Magnetic Field Strength, H (A/m) |
Magnetic Flux Density, B (µT) |
|
50 Hz |
10000 |
400 |
500 |
|
Reference levels for General Public exposure ICNIRP |
|||
|
Frequency |
Electric Field Strength, E (V/m) |
Magnetic Field Strength, H (A/m) |
Magnetic Flux Density, B (µT) |
|
50 Hz |
5000 |
80 |
100 |
Table 2: ICNIRP Exposure limits for Occupational and General Public exposure
A detailed description of the maximum measured magnetic fields in the outside area is shown in the following table.
|
Outside Field Measurements |
||||||
|
Distance from Side /m |
Maximum Magnetic Field (µT) at Z Height /m - Percentage of ICNIRP General Public Standard /% |
|||||
|
0.3m |
ICNIRP % |
1m |
ICNIRP % |
1.75m |
ICNIRP % |
|
|
Substation Front Side |
||||||
|
0m |
0.568 |
0.57% |
0.531 |
0.53% |
0.472 |
0.47% |
|
1m |
0.172 |
0.17% |
0.152 |
0.15% |
0.138 |
0.14% |
|
2m |
0.054 |
0.05% |
0.055 |
0.06% |
0.052 |
0.05% |
|
Substation Right Side |
||||||
|
0m |
4.002 |
4.00% |
5.058 |
5.06% |
2.972 |
2.97% |
|
1m |
0.307 |
0.31% |
0.318 |
0.32% |
0.242 |
0.24% |
|
2m |
0.049 |
0.05% |
0.049 |
0.05% |
0.048 |
0.05% |
|
Substation Back Side |
||||||
|
0m |
0.036 |
0.04% |
0.069 |
0.07% |
0.088 |
0.09% |
|
1m |
0.019 |
0.02% |
0.026 |
0.03% |
0.027 |
0.03% |
|
2m |
0.014 |
0.01% |
0.014 |
0.01% |
0.012 |
0.01% |
|
Substation Left Side |
||||||
|
0m |
0.066 |
0.07% |
0.066 |
0.07% |
0.066 |
0.07% |
|
1m |
0.021 |
0.02% |
0.022 |
0.02% |
0.019 |
0.02% |
|
2m |
0.016 |
0.02% |
0.016 |
0.02% |
0.015 |
0.02% |
Table 3: Magnetic Field Measurements in the outside area - Polymnia Substation
Accordingly a detailed description of the maximum measured magnetic fields in the inside area is shown in the table below.
|
Mesh Field Measurements inside Polymnia Substation |
||||||
|
Distance from Side /m |
Maximum Magnetic Field (µT) at Z Height /m - Percentage of ICNIRP General Public Standard /% |
|||||
|
0.3m |
ICNIRP % |
1m |
ICNIRP % |
1.75m |
ICNIRP % |
|
|
Field Measurements inside the Substation |
||||||
|
0m |
8.786 |
1.76% |
10.732 |
2.15% |
9.933 |
1.99% |
|
0.5m |
2.528 |
0.51% |
1.282 |
0.26% |
0.927 |
0.19% |
|
1m |
2.639 |
0.53% |
1.429 |
0.29% |
1.694 |
0.34% |
|
1.5m |
3.37 |
0.67% |
1.486 |
0.30% |
0.87 |
0.17% |
|
2m |
8.614 |
1.72% |
2.953 |
0.59% |
2.219 |
0.44% |
|
2.5m |
34.868 |
6.97% |
30.682 |
6.14% |
10.984 |
2.20% |
|
3m |
5.209 |
1.04% |
9.305 |
1.86% |
9.305 |
1.86% |
|
3.5m |
2.084 |
0.42% |
3.484 |
0.70% |
1.995 |
0.40% |
|
4m |
0.789 |
0.16% |
0.87 |
0.17% |
0.687 |
0.14% |
Table 4: Magnetic Field Measurements inside Polymnia Substation
|
Field Measurements Inside Polymnia Court Apartment |
||||||
|
Measurement Point |
Maximum Magnetic Field (µT) at Z Height /m - Percentage of ICNIRP General Public Standard /% |
|||||
|
0.3m |
ICNIRP % |
1m |
ICNIRP % |
1.75m |
ICNIRP % |
|
|
Inside Polymnia Court Apartment |
||||||
|
Measurement Point A |
-- |
-- |
0.008 |
0.018% |
-- |
-- |
|
Measurement Point B |
-- |
-- |
0.011 |
0.011% |
-- |
-- |
|
Measurement Point C |
-- |
-- |
0.012 |
0.012% |
-- |
-- |
Table 5: Magnetic Field Measurements inside the Polymnia Court Apartment