Monitoring of Moisture in Transformer Oil Using Optical Fiber as Sensor

Table 1

Measure of refractive index of transformer oil samples with different moisture content and temperature.

Temperature		Digital readings of microcontroller system with different percentage of oil-water mixture
In °C	Digital value	0%	0.2%	0.8%	2%	3%
50	102	204	312	356	425	438
45	092	141	283	270	368	347
40	081	125	180	194	235	261
35	071	82	128	137	165	188
30	061	60	88	95	104	115