• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.17 no.5
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• pp.351-357
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• 2024

The power handling capacity of the Loran-C transmitting antenna for terrestrial navigation was analyzed in this paper. The power handling capacity of a shortened umbrella-type monopole antenna for terrestrial navigation is determined by the insulation voltages of the base and guy insulators used in the antenna in addition to the effective height of the antenna. In this paper, the insulation voltage of the base insulator according to the transmitting antenna power was derived, and in order to obtain the insulation voltages of the points where the antenna and the guy lines are connected, the antenna voltages for the antenna height were derived. By comparing with the insulation voltages of the insulators used, the power handling capacity of the antenna can be analyzed. As a result of comparative analysis of the insulation characteristics of the insulators used for the transmitter antenna, the guy line insulation voltages were approximately 69[kV]~128[kV] depending on the antenna output of 50[kW]~100[kW], so the method of using two guy insulators in series was appropriate, and the insulation voltages at the base of the antenna were 64.8[kV]~91.7[kV], so it was possible to have a power handling capacity that could operate the antenna output power from 50[kW] to 100[kW].

• Transactions on Electrical and Electronic Materials
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• v.10 no.1
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• pp.9-15
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• 2009

There is a growing demand for a high voltage silicone rubber composite with high mechanical property and high electrical property. The effect of modified cross-linking agent on the mechanical, electrical properties, and short-circuit test performance of silicone rubber insulators have been investigated. To use base polymer, the various silicone polymers were prepared by the equilibrium polymerization. Aluminum trihydrate surface was treated by vinyl silane. Liquid silicone rubber nanocomposite was prepared from the compounding of VPMPS, HPDMS, catalyst, and alumina trihydrate modified with 1,3,5-trivinyl-l,3,5-trimethylcyclotrisiloxane. The mechanical property and electrical property for insulation materials were measured, indicating the high tensile strength and the good short-circuit property.

• Proceedings of the KIEE Conference
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• 2003.10a
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• pp.198-200
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• 2003

In this paper, electrical characteristics of EP(engineering plastic) studies for the purpose of electrical insulation materials. A base resin of the EP are Polyamide and Polyphthalamide. And filler is Glass Fibre. Electrical characteristics of EP represents volume resistivity, arc resistance and breakdown voltage according to glass fiber contents. We compare before water immersion and after water immersion. As the results of experiments, Polyphthalamide has good characteristics of insulation material rather than Polyamide as an insulator for electrical power system.