ELECTRIC SCREEN DEVICE

摘要

An electric screen device 2 for preventing creatures from intruding into a water channel 1, which comprises a pair of opposed electrode assemblies 12, 12 disposed on opposite sides of a water intake channel 1, and a dc pulse applying device 13 for applying dc pulses between said electrode assemblies 12, 12. In such electric screen device, the product of the peak value of the intensity of an electric field produced between the electrode assemblies 12, 12 by said dc pulse applying device 13 and the body length of creatures to be prevented from intrusion into the water channel is not less than 0.1 V, the dc pulse applying time is within the range of 2 - 200 msec, and the duty factor of the dc pulse is not more than 0.5. <IMAGE>