Substation

The measurements were performed on the 5th November 2015 at 09:30 a.m during cloudy weather conditions. The EMF measurements were performed for the Larnaca Municipal Library and substation “Larnaca Municipal Library” located at Leonida Kioupi Street, Larnaca. The following figures provide pictures of the area where EMF measurements were recorded.


Figure 1: Substation Larnaca Municipal Library	Figure 2:Residence in direct proximity

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 1: ICNIRP Exposure limits for Occupational and General Public exposure

The substation is rated at a nominal power of 500 KVA. At the time when the measurements were performed the substation load was recorded as:

Red Phase	Yellow Phase	Blue Phase
164A	170A	140A

Table 2: Measured load current

From the resultant load of all three phases as shown above we note that the load is 21.80 % of the nominal load (500 KVA Transformer).It must therefore be noted that during the summer or in periods of peak load this will directly affect and produce an increase to the electric and magnetic fields.

The maximum obtained values from the investigation are represented below and compared to the ICNIRP specified limits of General Public and Occupational standards. The highest magnetic field measurement is observed at the left side of the substation and has a value of 0.290 μT.

More specifically, this measurement is located 0 m away from the substation left side, 4 meters away from the starting point.

A detailed description of the maximum measured magnetic fields in the area under investigation is shown in the following table.

Magnetic Field Measurements
Distance from Side /m	Maximum Magnetic Field at Z Height /m - Percentage of ICNIRP General Public Standard /%
Distance from Side /m	0.3m	ICNIRP %	1m	ICNIRP %	1.75m	ICNIRP %
Substation front side - Mesh - Maximum values per line
M.L. 0m away from Substation front side	-	-	0.151	0.151%	-	-
M.L. 1m away from Substation front side	-	-	0.206	0.206%	-	-
M.L. 2m away from Substation front side	-	-	0.169	0.169%	-	-
Substation left side - Mesh - Maximum values per line
M.L. 0m away from Substation lef side	-	-	0.657	0.657%	-	-
M.L. 1m away from Substation left side	-	-	0.429	0.429%	-	-
M.L. 2m away from Substation left side	-	-	0.246	0.246%	-	-
Substation right side - Mesh - Maximum values per line
M.L. 0m away from Substation right side	0.259	0.259%	0.129	0.129%	0.096	0.096%
M.L. 1m away from Substation right side	0.241	0.241%	0.091	0.091%	0.089	0.089%
M.L. 2m away from Substation right side	0.139	0.139%	0.113	0.113%	0.148	0.148%
Substation back side - Mesh - Maximum values per line
M.L. 0m away from Substation back side	-	-	0.155	0.155%	-	-
M.L. 1m away from Substation back side	-	-	0.136	0.136%	-	-
M.L. 2m away from Substation back side	-	-	0.123	0.123%	-	-
Larnaca Mucipal Library - Groud Floor
M.P. MFG-A	-	-	0.091	0.091%	-	-
Larnaca Mucipal Library - First Floor
M.P. MFF1-B	-	-	0.031	0.031%	-	-
Larnaca Mucipal Library - Second Floor
M.P. MFF2-B	-	-	0.032	0.032%	-	-

Table 3: Maximum Magnetic Field Measurements.

The highest electric field measurement is observed inside the Larnaca Municipal Library at second floor. More specifically, the maximum value observed at the second floor is 3.944 V/m (measurement point EFG-A).

The maximum electric field measurements in the area under investigation are shown in the following table.

Outside Field Measurements
Measurement Point	Maximum Electric Field at Z Height /m - Percentage of ICNIRP General Public Standard /%
Measurement Point	0.3m	ICNIRP %	1m	ICNIRP %	1.75m	ICNIRP %
Substation Front side - Maximum point measurements
Measurement Point ESS-A	-	-	0.706	0.014%	-	-
Substation Left side - Maximum point measurements
Measurement Point ESS-D	-	-	0.771	0.015%	-	-
Substation Right side - Maximum point measurements
Measurement Point ESS-B	-	-	1.070	0.021%	-	-
Substation Back side - Maximum point measurements
Measurement Point ESS-C	-	-	0.724	0.014%	-	-
Larnaca Municipal Library Ground Floor - Maximum point measurements
Measurement Point EFG-A	-	-	3.944	0.014%	-	-
Larnaca Municipal Library First Floor - Maximum point measurements
Measurement Point EF1-B	-	-	0.817	0.016%	-	-
Larnaca Municipal Library Second Floor - Maximum point measurements
Measurement Point EF2-B	-	-	2.197	0.044%	-	-

Table 4: Electric Field Measurements.

Substation - Substation Larnaca Municipal Library, Leonida Kioupi Street