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Technology then and now

The influence of the electric field on the reaction of fish has long been used both for attracting and subsequently catching fish and for deterring fish from the area. Classic electrical barriers for fish consisted of a set of metal electrodes submerged in water, to which voltage was connected. Voltage was usually supplied by a 50/60 Hz electrical network. The voltage was changed by means of a transformer. With this type of construction, the electric field generated between electrodes was homogeneous, and the amount of electrical energy absorbed by the fish body depended on the size of the fish, the time spent in the inter-electrode area and the intensity of the electric field. This meant that if the voltage of the electrodes produced an electric field which deterred medium and large fish (without electrocuting them), it did not, in turn, deter small fish. Increasing the electric field strength, however, increasing the supply voltage, caused a deterrent effect on small fish, but paralysed both medium and large ones..

Safe electric field

A very important element determining the effective and safe for living organisms, including humans, working, is the way electrodes are powered. Selection of the power supply in the form of low voltage current pulses and appropriate selection of parameters such as: pulse duration, frequency and filling factor enable ecological and safe physical impact on fish. The field generated in this way does not paralyse fish, fry and other aquatic organisms and does not negatively affect their reproduction. Adequate selection of parameters and location of positive and negative electrodes reduces the risk of negative impact of the NEPTUN system on humans.

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PROCOM SYSTEM has been operating on the market since 1989, offering comprehensive implementation of tasks in the field of industrial automation, electrical installations, environmental protection systems and proprietary IT applications.

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