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Published in Philip A. Laplante, Comprehensive Dictionary of Electrical Engineering, 2018
pig tail pig tail a type of hot stick that can slide over an overhead conductor. piggyback board See daughter board. pinch-off region pigtail short electrical conductor used to connect the brushes of an electrical motor or generator to the external electrical connections of the machine. pilot carrier a means of providing a carrier at the receiver, which matches the received carrier in phase and frequency. In this method, which is employed in suppressed carrier modulation systems, a carrier of very small amplitude is inserted into the modulated signal prior to transmission, extracted and amplified in the receiver, and then employed as a matching carrier for coherent detection. pilot sequence a spreading code sequence used in a CDMA cellular network such as IS-95 to facilitate the PN code synchronization and coherent demodulation of the received signal. In the most typical case, the pilot sequence is utilized in the forward channel, i.e., transmission by the base station. pin the electronic connection that allows connection between an integrated circuit or circuit board and some socket into which it is plugged. PIN diode a diode with a large intrinsic region sandwiched between p- and n-doped semiconducting regions. pin insulator an electric insulator which is concentric with a hollow, threaded hole so that it can be screwed onto a steel pin mounted on a utility pole or crossarm. pinch effect the collapse of a hollow conductor due to the magnetic effects of very large currents. Sometimes observed in cable shields which have been struck by lightning. See ohmic region. pinch resistance the resistance of a fully depleted channel of a junction field effect transistor (JFET).
Optimised performance of cap and pin insulator under wet pollution conditions using a mono-objective genetic algorithm
Published in Australian Journal of Electrical and Electronics Engineering, 2019
D. Doufene, S. Bouazabia, A. Haddad
The studied sample (Figure 1) is a glass cap and pin insulator F12AS type. Its electrodes are made of a cast iron cap, which is set to ground potential and an energised steel pin. The insulating skirt is made of glass. The insulator has four under-shed ribs, numbered 1 to 4 in Figure 1, where S1 refers to the upper surface of the insulating glass shed and S2 refers to the entire surface of the creepage length.